<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!--NewPage--> <HTML> <HEAD> <!-- Generated by javadoc (build 1.6.0_18) on Fri Dec 09 20:47:34 GMT 2011 --> <TITLE> CompiledExpression </TITLE> <META NAME="date" CONTENT="2011-12-09"> <LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"> <SCRIPT type="text/javascript"> function windowTitle() { if (location.href.indexOf('is-external=true') == -1) { parent.document.title="CompiledExpression"; } } </SCRIPT> <NOSCRIPT> </NOSCRIPT> </HEAD> <BODY BGCOLOR="white" onload="windowTitle();"> <HR> <!-- ========= START OF TOP NAVBAR ======= --> <A NAME="navbar_top"><!-- --></A> <A HREF="#skip-navbar_top" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> <TR> <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_top_firstrow"><!-- --></A> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR> </TABLE> </TD> <TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> </EM> </TD> </TR> <TR> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../com/saxonica/bytecode/CompareToIntegerConstantCompiler.html" title="class in com.saxonica.bytecode"><B>PREV CLASS</B></A> <A HREF="../../../com/saxonica/bytecode/ComponentCompiler.html" title="class in com.saxonica.bytecode"><B>NEXT CLASS</B></A></FONT></TD> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?com/saxonica/bytecode/CompiledExpression.html" target="_top"><B>FRAMES</B></A> <A HREF="CompiledExpression.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--> </SCRIPT> <NOSCRIPT> <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A> </NOSCRIPT> </FONT></TD> </TR> <TR> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | <A HREF="#fields_inherited_from_class_net.sf.saxon.expr.Expression">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> </TR> </TABLE> <A NAME="skip-navbar_top"></A> <!-- ========= END OF TOP NAVBAR ========= --> <HR> <!-- ======== START OF CLASS DATA ======== --> <H2> <FONT SIZE="-1"> com.saxonica.bytecode</FONT> <BR> Class CompiledExpression</H2> <PRE> <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> <IMG SRC="../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">net.sf.saxon.expr.Expression</A> <IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>com.saxonica.bytecode.CompiledExpression</B> </PRE> <DL> <DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://download.oracle.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/javax/xml/transform/SourceLocator.html?is-external=true" title="class or interface in javax.xml.transform">SourceLocator</A>, <A HREF="../../../net/sf/saxon/event/LocationProvider.html" title="interface in net.sf.saxon.event">LocationProvider</A>, <A HREF="../../../net/sf/saxon/event/SaxonLocator.html" title="interface in net.sf.saxon.event">SaxonLocator</A>, <A HREF="../../../net/sf/saxon/trace/InstructionInfo.html" title="interface in net.sf.saxon.trace">InstructionInfo</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/org/xml/sax/Locator.html?is-external=true" title="class or interface in org.xml.sax">Locator</A></DD> </DL> <HR> <DL> <DT><PRE>public class <B>CompiledExpression</B><DT>extends <A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></DL> </PRE> <P> An expression that has been compiled to Java bytecode. The actual bytecode is contained in a separate object of type <A HREF="../../../com/saxonica/bytecode/GeneratedCode.html" title="class in com.saxonica.bytecode"><CODE>GeneratedCode</CODE></A>, to which evaluation is delegated <P> <P> <DL> <DT><B>See Also:</B><DD><A HREF="../../../serialized-form.html#com.saxonica.bytecode.CompiledExpression">Serialized Form</A></DL> <HR> <P> <!-- =========== FIELD SUMMARY =========== --> <A NAME="field_summary"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> <B>Field Summary</B></FONT></TH> </TR> </TABLE> <A NAME="fields_inherited_from_class_net.sf.saxon.expr.Expression"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> <TH ALIGN="left"><B>Fields inherited from class net.sf.saxon.expr.<A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></B></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#EFFECTIVE_BOOLEAN_VALUE">EFFECTIVE_BOOLEAN_VALUE</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#EVALUATE_METHOD">EVALUATE_METHOD</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#EVENT_FEED_METHOD">EVENT_FEED_METHOD</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#ITEM_FEED_METHOD">ITEM_FEED_METHOD</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#ITERATE_METHOD">ITERATE_METHOD</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#locationId">locationId</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#MAX_SEQUENCE_LENGTH">MAX_SEQUENCE_LENGTH</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#MAX_STRING_LENGTH">MAX_STRING_LENGTH</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#PROCESS_METHOD">PROCESS_METHOD</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#PUSH_SELECTION">PUSH_SELECTION</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#staticProperties">staticProperties</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#UNBOUNDED_LOWER">UNBOUNDED_LOWER</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#UNBOUNDED_UPPER">UNBOUNDED_UPPER</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#WATCH_METHOD">WATCH_METHOD</A></CODE></TD> </TR> </TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --> <A NAME="constructor_summary"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> <B>Constructor Summary</B></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#CompiledExpression(net.sf.saxon.expr.Expression, com.saxonica.bytecode.GeneratedCode)">CompiledExpression</A></B>(<A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> original, <A HREF="../../../com/saxonica/bytecode/GeneratedCode.html" title="class in com.saxonica.bytecode">GeneratedCode</A> byteCode)</CODE> <BR> </TD> </TR> </TABLE> <!-- ========== METHOD SUMMARY =========== --> <A NAME="method_summary"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> <B>Method Summary</B></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../net/sf/saxon/expr/parser/PathMap.PathMapNodeSet.html" title="class in net.sf.saxon.expr.parser">PathMap.PathMapNodeSet</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#addToPathMap(net.sf.saxon.expr.parser.PathMap, net.sf.saxon.expr.parser.PathMap.PathMapNodeSet)">addToPathMap</A></B>(<A HREF="../../../net/sf/saxon/expr/parser/PathMap.html" title="class in net.sf.saxon.expr.parser">PathMap</A> pathMap, <A HREF="../../../net/sf/saxon/expr/parser/PathMap.PathMapNodeSet.html" title="class in net.sf.saxon.expr.parser">PathMap.PathMapNodeSet</A> pathMapNodeSet)</CODE> <BR> Add a representation of this expression to a PathMap.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> void</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#checkForUpdatingSubexpressions()">checkForUpdatingSubexpressions</A></B>()</CODE> <BR> Check to ensure that this expression does not contain any inappropriate updating subexpressions.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> void</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#checkPermittedContents(net.sf.saxon.type.SchemaType, net.sf.saxon.expr.StaticContext, boolean)">checkPermittedContents</A></B>(<A HREF="../../../net/sf/saxon/type/SchemaType.html" title="interface in net.sf.saxon.type">SchemaType</A> parentType, <A HREF="../../../net/sf/saxon/expr/StaticContext.html" title="interface in net.sf.saxon.expr">StaticContext</A> env, boolean whole)</CODE> <BR> Check that any elements and attributes constructed or returned by this expression are acceptable in the content model of a given complex type.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>protected int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#computeCardinality()">computeCardinality</A></B>()</CODE> <BR> Compute the static cardinality of this expression</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#computeDependencies()">computeDependencies</A></B>()</CODE> <BR> Compute the dependencies of an expression, as the union of the dependencies of its subexpressions.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>protected int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#computeSpecialProperties()">computeSpecialProperties</A></B>()</CODE> <BR> Compute the special properties of this expression.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#copy()">copy</A></B>()</CODE> <BR> Copy an expression.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> void</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#evaluatePendingUpdates(net.sf.saxon.expr.XPathContext, net.sf.saxon.expr.PendingUpdateList)">evaluatePendingUpdates</A></B>(<A HREF="../../../net/sf/saxon/expr/XPathContext.html" title="interface in net.sf.saxon.expr">XPathContext</A> context, <A HREF="../../../net/sf/saxon/expr/PendingUpdateList.html" title="interface in net.sf.saxon.expr">PendingUpdateList</A> pul)</CODE> <BR> Evaluate an updating expression, adding the results to a Pending Update List.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> void</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#explain(net.sf.saxon.trace.ExpressionPresenter)">explain</A></B>(<A HREF="../../../net/sf/saxon/trace/ExpressionPresenter.html" title="class in net.sf.saxon.trace">ExpressionPresenter</A> out)</CODE> <BR> Diagnostic print of expression structure.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getCardinality()">getCardinality</A></B>()</CODE> <BR> Determine the static cardinality of the expression.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getConstructType()">getConstructType</A></B>()</CODE> <BR> Get the type of this expression for use in tracing and diagnostics</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getDependencies()">getDependencies</A></B>()</CODE> <BR> Determine which aspects of the context the expression depends on.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getExpressionName()">getExpressionName</A></B>()</CODE> <BR> Get a name identifying the kind of expression, in terms meaningful to a user.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getHostLanguage()">getHostLanguage</A></B>()</CODE> <BR> Get the host language (XSLT, XQuery, XPath) used to implement the code in this container</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getImplementationMethod()">getImplementationMethod</A></B>()</CODE> <BR> An implementation of Expression must provide at least one of the methods evaluateItem(), iterate(), or process().</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getIntrinsicDependencies()">getIntrinsicDependencies</A></B>()</CODE> <BR> Determine the intrinsic dependencies of an expression, that is, those which are not derived from the dependencies of its subexpressions.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../net/sf/saxon/type/ItemType.html" title="interface in net.sf.saxon.type">ItemType</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getItemType(net.sf.saxon.type.TypeHierarchy)">getItemType</A></B>(<A HREF="../../../net/sf/saxon/type/TypeHierarchy.html" title="class in net.sf.saxon.type">TypeHierarchy</A> th)</CODE> <BR> Determine the data type of the expression, if possible.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../net/sf/saxon/om/StructuredQName.html" title="class in net.sf.saxon.om">StructuredQName</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getObjectName()">getObjectName</A></B>()</CODE> <BR> Get a name identifying the object of the expression, for example a function name, template name, variable name, key name, element name, etc.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="http://download.oracle.com/javase/6/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getProperties()">getProperties</A></B>()</CODE> <BR> Get an iterator over all the properties available.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#getProperty(java.lang.String)">getProperty</A></B>(<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> name)</CODE> <BR> Get the value of a particular property of the instruction.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> boolean</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#isSubtreeExpression()">isSubtreeExpression</A></B>()</CODE> <BR> Determine whether the expression can be evaluated without reference to the part of the context document outside the subtree rooted at the context node.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> boolean</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#isUpdatingExpression()">isUpdatingExpression</A></B>()</CODE> <BR> Determine whether this is an updating expression as defined in the XQuery update specification</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> boolean</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#isVacuousExpression()">isVacuousExpression</A></B>()</CODE> <BR> Determine whether this is a vacuous expression as defined in the XQuery update specification</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../net/sf/saxon/om/SequenceIterator.html" title="interface in net.sf.saxon.om">SequenceIterator</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#iterate(net.sf.saxon.expr.XPathContext)">iterate</A></B>(<A HREF="../../../net/sf/saxon/expr/XPathContext.html" title="interface in net.sf.saxon.expr">XPathContext</A> context)</CODE> <BR> Return an Iterator to iterate over the values of a sequence.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="http://download.oracle.com/javase/6/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</A><<A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A>></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#iterateSubExpressions()">iterateSubExpressions</A></B>()</CODE> <BR> Get the immediate sub-expressions of this expression.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> void</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#process(net.sf.saxon.expr.XPathContext)">process</A></B>(<A HREF="../../../net/sf/saxon/expr/XPathContext.html" title="interface in net.sf.saxon.expr">XPathContext</A> context)</CODE> <BR> Process the instruction, without returning any tail calls</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> boolean</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#replaceSubExpression(net.sf.saxon.expr.Expression, net.sf.saxon.expr.Expression)">replaceSubExpression</A></B>(<A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> original, <A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> replacement)</CODE> <BR> Replace one subexpression by a replacement subexpression</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../com/saxonica/bytecode/CompiledExpression.html#toString()">toString</A></B>()</CODE> <BR> The toString() method for an expression attempts to give a representation of the expression in an XPath-like form, but there is no guarantee that the syntax will actually be true XPath.</TD> </TR> </TABLE> <A NAME="methods_inherited_from_class_net.sf.saxon.expr.Expression"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> <TH ALIGN="left"><B>Methods inherited from class net.sf.saxon.expr.<A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></B></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#adoptChildExpression(net.sf.saxon.expr.Expression)">adoptChildExpression</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#computeStaticProperties()">computeStaticProperties</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#doPromotion(net.sf.saxon.expr.Expression, net.sf.saxon.expr.parser.PromotionOffer)">doPromotion</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#dynamicError(java.lang.String, java.lang.String, net.sf.saxon.expr.XPathContext)">dynamicError</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#effectiveBooleanValue(net.sf.saxon.expr.XPathContext)">effectiveBooleanValue</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#evaluateAsString(net.sf.saxon.expr.XPathContext)">evaluateAsString</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#evaluateItem(net.sf.saxon.expr.XPathContext)">evaluateItem</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#explain(java.io.OutputStream)">explain</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getColumnNumber()">getColumnNumber</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getColumnNumber(long)">getColumnNumber</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getContainer()">getContainer</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getEvaluationMethod()">getEvaluationMethod</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getExecutable()">getExecutable</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getIntegerBounds()">getIntegerBounds</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getLineNumber()">getLineNumber</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getLineNumber(long)">getLineNumber</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getLocationId()">getLocationId</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getLocationProvider()">getLocationProvider</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getPublicId()">getPublicId</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getSlotsUsed()">getSlotsUsed</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getSpecialProperties()">getSpecialProperties</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getSystemId()">getSystemId</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#getSystemId(long)">getSystemId</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#hasLoopingSubexpression(net.sf.saxon.expr.Expression)">hasLoopingSubexpression</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#hasVariableBinding(net.sf.saxon.expr.Binding)">hasVariableBinding</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#implementsStaticTypeCheck()">implementsStaticTypeCheck</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#iterateEvents(net.sf.saxon.expr.XPathContext)">iterateEvents</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#iterateSameFocusSubExpressions()">iterateSameFocusSubExpressions</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#markTailFunctionCalls(net.sf.saxon.om.StructuredQName, int)">markTailFunctionCalls</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#optimize(net.sf.saxon.expr.parser.ExpressionVisitor, net.sf.saxon.expr.parser.ExpressionVisitor.ContextItemType)">optimize</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#promote(net.sf.saxon.expr.parser.PromotionOffer, net.sf.saxon.expr.Expression)">promote</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#resetLocalStaticProperties()">resetLocalStaticProperties</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#setContainer(net.sf.saxon.expr.Container)">setContainer</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#setEvaluationMethod(int)">setEvaluationMethod</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#setFiltered(boolean)">setFiltered</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#setFlattened(boolean)">setFlattened</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#setLocationId(int)">setLocationId</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#simplify(net.sf.saxon.expr.parser.ExpressionVisitor)">simplify</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#staticTypeCheck(net.sf.saxon.value.SequenceType, boolean, net.sf.saxon.expr.parser.RoleLocator, net.sf.saxon.TypeCheckerEnvironment)">staticTypeCheck</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#suppressValidation(int)">suppressValidation</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#typeCheck(net.sf.saxon.expr.parser.ExpressionVisitor, net.sf.saxon.expr.parser.ExpressionVisitor.ContextItemType)">typeCheck</A>, <A HREF="../../../net/sf/saxon/expr/Expression.html#typeError(java.lang.String, java.lang.String, net.sf.saxon.expr.XPathContext)">typeError</A></CODE></TD> </TR> </TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> </TR> </TABLE> <P> <!-- ========= CONSTRUCTOR DETAIL ======== --> <A NAME="constructor_detail"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> <B>Constructor Detail</B></FONT></TH> </TR> </TABLE> <A NAME="CompiledExpression(net.sf.saxon.expr.Expression, com.saxonica.bytecode.GeneratedCode)"><!-- --></A><H3> CompiledExpression</H3> <PRE> public <B>CompiledExpression</B>(<A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> original, <A HREF="../../../com/saxonica/bytecode/GeneratedCode.html" title="class in com.saxonica.bytecode">GeneratedCode</A> byteCode)</PRE> <DL> </DL> <!-- ============ METHOD DETAIL ========== --> <A NAME="method_detail"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> <B>Method Detail</B></FONT></TH> </TR> </TABLE> <A NAME="getExpressionName()"><!-- --></A><H3> getExpressionName</H3> <PRE> public <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>getExpressionName</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getExpressionName()">Expression</A></CODE></B></DD> <DD>Get a name identifying the kind of expression, in terms meaningful to a user. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getExpressionName()">getExpressionName</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>a name identifying the kind of expression, in terms meaningful to a user. The name will always be in the form of a lexical XML QName, and should match the name used in explain() output displaying the expression.</DL> </DD> </DL> <HR> <A NAME="getImplementationMethod()"><!-- --></A><H3> getImplementationMethod</H3> <PRE> public int <B>getImplementationMethod</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getImplementationMethod()">Expression</A></CODE></B></DD> <DD>An implementation of Expression must provide at least one of the methods evaluateItem(), iterate(), or process(). This method indicates which of these methods is provided directly. The other methods will always be available indirectly, using an implementation that relies on one of the other methods. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getImplementationMethod()">getImplementationMethod</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the implementation method, for example <A HREF="../../../net/sf/saxon/expr/Expression.html#ITERATE_METHOD"><CODE>Expression.ITERATE_METHOD</CODE></A> or <A HREF="../../../net/sf/saxon/expr/Expression.html#EVALUATE_METHOD"><CODE>Expression.EVALUATE_METHOD</CODE></A> or <A HREF="../../../net/sf/saxon/expr/Expression.html#PROCESS_METHOD"><CODE>Expression.PROCESS_METHOD</CODE></A></DL> </DD> </DL> <HR> <A NAME="getCardinality()"><!-- --></A><H3> getCardinality</H3> <PRE> public int <B>getCardinality</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getCardinality()">Expression</A></CODE></B></DD> <DD>Determine the static cardinality of the expression. This establishes how many items there will be in the result of the expression, at compile time (i.e., without actually evaluating the result. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getCardinality()">getCardinality</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>one of the values Cardinality.ONE_OR_MORE, Cardinality.ZERO_OR_MORE, Cardinality.EXACTLY_ONE, Cardinality.ZERO_OR_ONE, Cardinality.EMPTY. This default implementation returns ZERO_OR_MORE (which effectively gives no information).</DL> </DD> </DL> <HR> <A NAME="getItemType(net.sf.saxon.type.TypeHierarchy)"><!-- --></A><H3> getItemType</H3> <PRE> public <A HREF="../../../net/sf/saxon/type/ItemType.html" title="interface in net.sf.saxon.type">ItemType</A> <B>getItemType</B>(<A HREF="../../../net/sf/saxon/type/TypeHierarchy.html" title="class in net.sf.saxon.type">TypeHierarchy</A> th)</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getItemType(net.sf.saxon.type.TypeHierarchy)">Expression</A></CODE></B></DD> <DD>Determine the data type of the expression, if possible. All expression return sequences, in general; this method determines the type of the items within the sequence, assuming that (a) this is known in advance, and (b) it is the same for all items in the sequence. <p>This method should always return a result, though it may be the best approximation that is available at the time.</p> <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getItemType(net.sf.saxon.type.TypeHierarchy)">getItemType</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>th</CODE> - the type hierarchy cache <DT><B>Returns:</B><DD>a value such as Type.STRING, Type.BOOLEAN, Type.NUMBER, Type.NODE, or Type.ITEM (meaning not known at compile time)</DL> </DD> </DL> <HR> <A NAME="getDependencies()"><!-- --></A><H3> getDependencies</H3> <PRE> public int <B>getDependencies</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getDependencies()">Expression</A></CODE></B></DD> <DD>Determine which aspects of the context the expression depends on. The result is a bitwise-or'ed value composed from constants such as XPathContext.VARIABLES and XPathContext.CURRENT_NODE. The default implementation combines the intrinsic dependencies of this expression with the dependencies of the subexpressions, computed recursively. This is overridden for expressions such as FilterExpression where a subexpression's dependencies are not necessarily inherited by the parent expression. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getDependencies()">getDependencies</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>a set of bit-significant flags identifying the dependencies of the expression</DL> </DD> </DL> <HR> <A NAME="process(net.sf.saxon.expr.XPathContext)"><!-- --></A><H3> process</H3> <PRE> public void <B>process</B>(<A HREF="../../../net/sf/saxon/expr/XPathContext.html" title="interface in net.sf.saxon.expr">XPathContext</A> context) throws <A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#process(net.sf.saxon.expr.XPathContext)">Expression</A></CODE></B></DD> <DD>Process the instruction, without returning any tail calls <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#process(net.sf.saxon.expr.XPathContext)">process</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>context</CODE> - The dynamic context, giving access to the current node, the current variables, etc. <DT><B>Throws:</B> <DD><CODE><A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></CODE> - if a dynamic error occurs</DL> </DD> </DL> <HR> <A NAME="evaluatePendingUpdates(net.sf.saxon.expr.XPathContext, net.sf.saxon.expr.PendingUpdateList)"><!-- --></A><H3> evaluatePendingUpdates</H3> <PRE> public void <B>evaluatePendingUpdates</B>(<A HREF="../../../net/sf/saxon/expr/XPathContext.html" title="interface in net.sf.saxon.expr">XPathContext</A> context, <A HREF="../../../net/sf/saxon/expr/PendingUpdateList.html" title="interface in net.sf.saxon.expr">PendingUpdateList</A> pul) throws <A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#evaluatePendingUpdates(net.sf.saxon.expr.XPathContext, net.sf.saxon.expr.PendingUpdateList)">Expression</A></CODE></B></DD> <DD>Evaluate an updating expression, adding the results to a Pending Update List. The default implementation of this method, which is used for non-updating expressions, throws an UnsupportedOperationException <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#evaluatePendingUpdates(net.sf.saxon.expr.XPathContext, net.sf.saxon.expr.PendingUpdateList)">evaluatePendingUpdates</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>context</CODE> - the XPath dynamic evaluation context<DD><CODE>pul</CODE> - the pending update list to which the results should be written <DT><B>Throws:</B> <DD><CODE><A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></CODE> - if evaluation fails</DL> </DD> </DL> <HR> <A NAME="toString()"><!-- --></A><H3> toString</H3> <PRE> public <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>toString</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#toString()">Expression</A></CODE></B></DD> <DD>The toString() method for an expression attempts to give a representation of the expression in an XPath-like form, but there is no guarantee that the syntax will actually be true XPath. In the case of XSLT instructions, the toString() method gives an abstracted view of the syntax <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#toString()">toString</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>a representation of the expression as a string</DL> </DD> </DL> <HR> <A NAME="explain(net.sf.saxon.trace.ExpressionPresenter)"><!-- --></A><H3> explain</H3> <PRE> public void <B>explain</B>(<A HREF="../../../net/sf/saxon/trace/ExpressionPresenter.html" title="class in net.sf.saxon.trace">ExpressionPresenter</A> out)</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#explain(net.sf.saxon.trace.ExpressionPresenter)">Expression</A></CODE></B></DD> <DD>Diagnostic print of expression structure. The abstract expression tree is written to the supplied output destination. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#explain(net.sf.saxon.trace.ExpressionPresenter)">explain</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>out</CODE> - the expression presenter used to display the structure</DL> </DD> </DL> <HR> <A NAME="checkPermittedContents(net.sf.saxon.type.SchemaType, net.sf.saxon.expr.StaticContext, boolean)"><!-- --></A><H3> checkPermittedContents</H3> <PRE> public void <B>checkPermittedContents</B>(<A HREF="../../../net/sf/saxon/type/SchemaType.html" title="interface in net.sf.saxon.type">SchemaType</A> parentType, <A HREF="../../../net/sf/saxon/expr/StaticContext.html" title="interface in net.sf.saxon.expr">StaticContext</A> env, boolean whole) throws <A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#checkPermittedContents(net.sf.saxon.type.SchemaType, net.sf.saxon.expr.StaticContext, boolean)">Expression</A></CODE></B></DD> <DD>Check that any elements and attributes constructed or returned by this expression are acceptable in the content model of a given complex type. It's always OK to say yes, since the check will be repeated at run-time. The process of checking element and attribute constructors against the content model of a complex type also registers the type of content expected of those constructors, so the static validation can continue recursively. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#checkPermittedContents(net.sf.saxon.type.SchemaType, net.sf.saxon.expr.StaticContext, boolean)">checkPermittedContents</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>parentType</CODE> - the "given complex type": the method is checking that the nodes returned by this expression are acceptable members of the content model of this type<DD><CODE>env</CODE> - the static context<DD><CODE>whole</CODE> - if true, we want to check that the value of this expression satisfies the content model as a whole; if false we want to check that the value of the expression is acceptable as one part of the content <DT><B>Throws:</B> <DD><CODE><A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></CODE> - if the value delivered by this expression cannot be part of the content model of the given type</DL> </DD> </DL> <HR> <A NAME="computeCardinality()"><!-- --></A><H3> computeCardinality</H3> <PRE> protected int <B>computeCardinality</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#computeCardinality()">Expression</A></CODE></B></DD> <DD>Compute the static cardinality of this expression <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#computeCardinality()">computeCardinality</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the computed cardinality, as one of the values <A HREF="../../../net/sf/saxon/expr/StaticProperty.html#ALLOWS_ZERO_OR_ONE"><CODE>StaticProperty.ALLOWS_ZERO_OR_ONE</CODE></A>, <A HREF="../../../net/sf/saxon/expr/StaticProperty.html#EXACTLY_ONE"><CODE>StaticProperty.EXACTLY_ONE</CODE></A>, <A HREF="../../../net/sf/saxon/expr/StaticProperty.html#ALLOWS_ONE_OR_MORE"><CODE>StaticProperty.ALLOWS_ONE_OR_MORE</CODE></A>, <A HREF="../../../net/sf/saxon/expr/StaticProperty.html#ALLOWS_ZERO_OR_MORE"><CODE>StaticProperty.ALLOWS_ZERO_OR_MORE</CODE></A></DL> </DD> </DL> <HR> <A NAME="computeSpecialProperties()"><!-- --></A><H3> computeSpecialProperties</H3> <PRE> protected int <B>computeSpecialProperties</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#computeSpecialProperties()">Expression</A></CODE></B></DD> <DD>Compute the special properties of this expression. These properties are denoted by a bit-significant integer, possible values are in class <A HREF="../../../net/sf/saxon/expr/StaticProperty.html" title="class in net.sf.saxon.expr"><CODE>StaticProperty</CODE></A>. The "special" properties are properties other than cardinality and dependencies, and most of them relate to properties of node sequences, for example whether the nodes are in document order. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#computeSpecialProperties()">computeSpecialProperties</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the special properties, as a bit-significant integer</DL> </DD> </DL> <HR> <A NAME="computeDependencies()"><!-- --></A><H3> computeDependencies</H3> <PRE> public int <B>computeDependencies</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#computeDependencies()">Expression</A></CODE></B></DD> <DD>Compute the dependencies of an expression, as the union of the dependencies of its subexpressions. (This is overridden for path expressions and filter expressions, where the dependencies of a subexpression are not all propogated). This method should be called only once, to compute the dependencies; after that, getDependencies should be used. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#computeDependencies()">computeDependencies</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the depencies, as a bit-mask</DL> </DD> </DL> <HR> <A NAME="getIntrinsicDependencies()"><!-- --></A><H3> getIntrinsicDependencies</H3> <PRE> public int <B>getIntrinsicDependencies</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getIntrinsicDependencies()">Expression</A></CODE></B></DD> <DD>Determine the intrinsic dependencies of an expression, that is, those which are not derived from the dependencies of its subexpressions. For example, position() has an intrinsic dependency on the context position, while (position()+1) does not. The default implementation of the method returns 0, indicating "no dependencies". <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getIntrinsicDependencies()">getIntrinsicDependencies</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>a set of bit-significant flags identifying the "intrinsic" dependencies. The flags are documented in class net.sf.saxon.value.StaticProperty</DL> </DD> </DL> <HR> <A NAME="checkForUpdatingSubexpressions()"><!-- --></A><H3> checkForUpdatingSubexpressions</H3> <PRE> public void <B>checkForUpdatingSubexpressions</B>() throws <A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#checkForUpdatingSubexpressions()">Expression</A></CODE></B></DD> <DD>Check to ensure that this expression does not contain any inappropriate updating subexpressions. This check is overridden for those expressions that permit updating subexpressions. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#checkForUpdatingSubexpressions()">checkForUpdatingSubexpressions</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Throws:</B> <DD><CODE><A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></CODE> - if the expression has a non-permitted updating subexpression</DL> </DD> </DL> <HR> <A NAME="isUpdatingExpression()"><!-- --></A><H3> isUpdatingExpression</H3> <PRE> public boolean <B>isUpdatingExpression</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#isUpdatingExpression()">Expression</A></CODE></B></DD> <DD>Determine whether this is an updating expression as defined in the XQuery update specification <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#isUpdatingExpression()">isUpdatingExpression</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>true if this is an updating expression</DL> </DD> </DL> <HR> <A NAME="isVacuousExpression()"><!-- --></A><H3> isVacuousExpression</H3> <PRE> public boolean <B>isVacuousExpression</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#isVacuousExpression()">Expression</A></CODE></B></DD> <DD>Determine whether this is a vacuous expression as defined in the XQuery update specification <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#isVacuousExpression()">isVacuousExpression</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>true if this expression is vacuous</DL> </DD> </DL> <HR> <A NAME="copy()"><!-- --></A><H3> copy</H3> <PRE> public <A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> <B>copy</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#copy()">Expression</A></CODE></B></DD> <DD>Copy an expression. This makes a deep copy. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#copy()">copy</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the copy of the original expression</DL> </DD> </DL> <HR> <A NAME="replaceSubExpression(net.sf.saxon.expr.Expression, net.sf.saxon.expr.Expression)"><!-- --></A><H3> replaceSubExpression</H3> <PRE> public boolean <B>replaceSubExpression</B>(<A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> original, <A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> replacement)</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#replaceSubExpression(net.sf.saxon.expr.Expression, net.sf.saxon.expr.Expression)">Expression</A></CODE></B></DD> <DD>Replace one subexpression by a replacement subexpression <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#replaceSubExpression(net.sf.saxon.expr.Expression, net.sf.saxon.expr.Expression)">replaceSubExpression</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>original</CODE> - the original subexpression<DD><CODE>replacement</CODE> - the replacement subexpression <DT><B>Returns:</B><DD>true if the original subexpression is found</DL> </DD> </DL> <HR> <A NAME="getConstructType()"><!-- --></A><H3> getConstructType</H3> <PRE> public int <B>getConstructType</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getConstructType()">Expression</A></CODE></B></DD> <DD>Get the type of this expression for use in tracing and diagnostics <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html#getConstructType()">getConstructType</A></CODE> in interface <CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html" title="interface in net.sf.saxon.trace">InstructionInfo</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getConstructType()">getConstructType</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the type of expression, as enumerated in class <A HREF="../../../net/sf/saxon/trace/Location.html" title="class in net.sf.saxon.trace"><CODE>Location</CODE></A></DL> </DD> </DL> <HR> <A NAME="getObjectName()"><!-- --></A><H3> getObjectName</H3> <PRE> public <A HREF="../../../net/sf/saxon/om/StructuredQName.html" title="class in net.sf.saxon.om">StructuredQName</A> <B>getObjectName</B>()</PRE> <DL> <DD><B>Description copied from interface: <CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html#getObjectName()">InstructionInfo</A></CODE></B></DD> <DD>Get a name identifying the object of the expression, for example a function name, template name, variable name, key name, element name, etc. This is used only where the name is known statically. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html#getObjectName()">getObjectName</A></CODE> in interface <CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html" title="interface in net.sf.saxon.trace">InstructionInfo</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getObjectName()">getObjectName</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the QName of the object declared or manipulated by this instruction or expression</DL> </DD> </DL> <HR> <A NAME="getProperty(java.lang.String)"><!-- --></A><H3> getProperty</H3> <PRE> public <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> <B>getProperty</B>(<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> name)</PRE> <DL> <DD><B>Description copied from interface: <CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html#getProperty(java.lang.String)">InstructionInfo</A></CODE></B></DD> <DD>Get the value of a particular property of the instruction. Properties of XSLT instructions are generally known by the name of the stylesheet attribute that defines them. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html#getProperty(java.lang.String)">getProperty</A></CODE> in interface <CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html" title="interface in net.sf.saxon.trace">InstructionInfo</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getProperty(java.lang.String)">getProperty</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>name</CODE> - The name of the required property <DT><B>Returns:</B><DD>The value of the requested property, or null if the property is not available</DL> </DD> </DL> <HR> <A NAME="getProperties()"><!-- --></A><H3> getProperties</H3> <PRE> public <A HREF="http://download.oracle.com/javase/6/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</A> <B>getProperties</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getProperties()">Expression</A></CODE></B></DD> <DD>Get an iterator over all the properties available. The values returned by the iterator will be of type String, and each string can be supplied as input to the getProperty() method to retrieve the value of the property. The iterator may return properties whose value is null. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html#getProperties()">getProperties</A></CODE> in interface <CODE><A HREF="../../../net/sf/saxon/trace/InstructionInfo.html" title="interface in net.sf.saxon.trace">InstructionInfo</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getProperties()">getProperties</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>an iterator over the properties.</DL> </DD> </DL> <HR> <A NAME="getHostLanguage()"><!-- --></A><H3> getHostLanguage</H3> <PRE> public int <B>getHostLanguage</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getHostLanguage()">Expression</A></CODE></B></DD> <DD>Get the host language (XSLT, XQuery, XPath) used to implement the code in this container <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#getHostLanguage()">getHostLanguage</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>typically <A HREF="../../../net/sf/saxon/Configuration.html#XSLT"><CODE>Configuration.XSLT</CODE></A> or <A HREF="../../../net/sf/saxon/Configuration.html#XQUERY"><CODE>Configuration.XQUERY</CODE></A></DL> </DD> </DL> <HR> <A NAME="addToPathMap(net.sf.saxon.expr.parser.PathMap, net.sf.saxon.expr.parser.PathMap.PathMapNodeSet)"><!-- --></A><H3> addToPathMap</H3> <PRE> public <A HREF="../../../net/sf/saxon/expr/parser/PathMap.PathMapNodeSet.html" title="class in net.sf.saxon.expr.parser">PathMap.PathMapNodeSet</A> <B>addToPathMap</B>(<A HREF="../../../net/sf/saxon/expr/parser/PathMap.html" title="class in net.sf.saxon.expr.parser">PathMap</A> pathMap, <A HREF="../../../net/sf/saxon/expr/parser/PathMap.PathMapNodeSet.html" title="class in net.sf.saxon.expr.parser">PathMap.PathMapNodeSet</A> pathMapNodeSet)</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#addToPathMap(net.sf.saxon.expr.parser.PathMap, net.sf.saxon.expr.parser.PathMap.PathMapNodeSet)">Expression</A></CODE></B></DD> <DD>Add a representation of this expression to a PathMap. The PathMap captures a map of the nodes visited by an expression in a source tree. <p>The default implementation of this method assumes that an expression does no navigation other than the navigation done by evaluating its subexpressions, and that the subexpressions are evaluated in the same context as the containing expression. The method must be overridden for any expression where these assumptions do not hold. For example, implementations exist for AxisExpression, ParentExpression, and RootExpression (because they perform navigation), and for the doc(), document(), and collection() functions because they create a new navigation root. Implementations also exist for PathExpression and FilterExpression because they have subexpressions that are evaluated in a different context from the calling expression.</p> <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#addToPathMap(net.sf.saxon.expr.parser.PathMap, net.sf.saxon.expr.parser.PathMap.PathMapNodeSet)">addToPathMap</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>pathMap</CODE> - the PathMap to which the expression should be added<DD><CODE>pathMapNodeSet</CODE> - the PathMapNodeSet to which the paths embodied in this expression should be added <DT><B>Returns:</B><DD>the pathMapNodeSet representing the points in the source document that are both reachable by this expression, and that represent possible results of this expression. For an expression that does navigation, it represents the end of the arc in the path map that describes the navigation route. For other expressions, it is the same as the input pathMapNode.</DL> </DD> </DL> <HR> <A NAME="isSubtreeExpression()"><!-- --></A><H3> isSubtreeExpression</H3> <PRE> public boolean <B>isSubtreeExpression</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#isSubtreeExpression()">Expression</A></CODE></B></DD> <DD>Determine whether the expression can be evaluated without reference to the part of the context document outside the subtree rooted at the context node. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#isSubtreeExpression()">isSubtreeExpression</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>true if the expression has no dependencies on the context node, or if the only dependencies on the context node are downward selections using the self, child, descendant, attribute, and namespace axes.</DL> </DD> </DL> <HR> <A NAME="iterate(net.sf.saxon.expr.XPathContext)"><!-- --></A><H3> iterate</H3> <PRE> public <A HREF="../../../net/sf/saxon/om/SequenceIterator.html" title="interface in net.sf.saxon.om">SequenceIterator</A> <B>iterate</B>(<A HREF="../../../net/sf/saxon/expr/XPathContext.html" title="interface in net.sf.saxon.expr">XPathContext</A> context) throws <A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#iterate(net.sf.saxon.expr.XPathContext)">Expression</A></CODE></B></DD> <DD>Return an Iterator to iterate over the values of a sequence. The value of every expression can be regarded as a sequence, so this method is supported for all expressions. This default implementation handles iteration for expressions that return singleton values: for non-singleton expressions, the subclass must provide its own implementation. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#iterate(net.sf.saxon.expr.XPathContext)">iterate</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Parameters:</B><DD><CODE>context</CODE> - supplies the context for evaluation <DT><B>Returns:</B><DD>a SequenceIterator that can be used to iterate over the result of the expression <DT><B>Throws:</B> <DD><CODE><A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></CODE> - if any dynamic error occurs evaluating the expression</DL> </DD> </DL> <HR> <A NAME="iterateSubExpressions()"><!-- --></A><H3> iterateSubExpressions</H3> <PRE> public <A HREF="http://download.oracle.com/javase/6/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</A><<A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A>> <B>iterateSubExpressions</B>()</PRE> <DL> <DD><B>Description copied from class: <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#iterateSubExpressions()">Expression</A></CODE></B></DD> <DD>Get the immediate sub-expressions of this expression. Default implementation returns a zero-length array, appropriate for an expression that has no sub-expressions. <P> <DD><DL> <DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/Expression.html#iterateSubExpressions()">iterateSubExpressions</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>an iterator containing the sub-expressions of this expression</DL> </DD> </DL> <!-- ========= END OF CLASS DATA ========= --> <HR> <!-- ======= START OF BOTTOM NAVBAR ====== --> <A NAME="navbar_bottom"><!-- --></A> <A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> <TR> <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_bottom_firstrow"><!-- --></A> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR> </TABLE> </TD> <TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> </EM> </TD> </TR> <TR> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../com/saxonica/bytecode/CompareToIntegerConstantCompiler.html" title="class in com.saxonica.bytecode"><B>PREV CLASS</B></A> <A HREF="../../../com/saxonica/bytecode/ComponentCompiler.html" title="class in com.saxonica.bytecode"><B>NEXT CLASS</B></A></FONT></TD> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?com/saxonica/bytecode/CompiledExpression.html" target="_top"><B>FRAMES</B></A> <A HREF="CompiledExpression.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--> </SCRIPT> <NOSCRIPT> <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A> </NOSCRIPT> </FONT></TD> </TR> <TR> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | <A HREF="#fields_inherited_from_class_net.sf.saxon.expr.Expression">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> </TR> </TABLE> <A NAME="skip-navbar_bottom"></A> <!-- ======== END OF BOTTOM NAVBAR ======= --> <HR> Copyright (c) 2004-2011 Saxonica Limited. 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