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GeneralVariable
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SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
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net.sf.saxon.expr.instruct</FONT>
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Class GeneralVariable</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 "><B>net.sf.saxon.expr.instruct.GeneralVariable</B>
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<DT><B>All Implemented Interfaces:</B> <DD><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/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</A></DD>
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<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../../net/sf/saxon/expr/instruct/GlobalVariable.html" title="class in net.sf.saxon.expr.instruct">GlobalVariable</A>, <A HREF="../../../../../net/sf/saxon/expr/instruct/LocalParam.html" title="class in net.sf.saxon.expr.instruct">LocalParam</A>, <A HREF="../../../../../net/sf/saxon/expr/instruct/LocalVariable.html" title="class in net.sf.saxon.expr.instruct">LocalVariable</A>, <A HREF="../../../../../net/sf/saxon/expr/instruct/WithParam.html" title="class in net.sf.saxon.expr.instruct">WithParam</A></DD>
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<DT><PRE>public abstract class <B>GeneralVariable</B><DT>extends <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><DT>implements <A HREF="../../../../../net/sf/saxon/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</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></DL>
</PRE>
<P>
This class defines common behaviour across xsl:variable, xsl:param, and xsl:with-param;
also saxon:assign
<P>
<P>
<HR>
<P>
<!-- =========== FIELD SUMMARY =========== -->
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<B>Field Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#evaluationMode">evaluationMode</A></B></CODE>
<BR>
</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#referenceCount">referenceCount</A></B></CODE>
<BR>
</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#slotNumber">slotNumber</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#variableQName">variableQName</A></B></CODE>
<BR>
</TD>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<B>Constructor Summary</B></FONT></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#GeneralVariable()">GeneralVariable</A></B>()</CODE>
<BR>
Create a general variable</TD>
</TR>
</TABLE>
<!-- ========== METHOD SUMMARY =========== -->
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>Method Summary</B></FONT></TH>
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<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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#addReference(boolean)">addReference</A></B>(boolean isLoopingReference)</CODE>
<BR>
Register a variable reference that refers to the variable bound in 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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#checkAgainstRequiredType(net.sf.saxon.expr.parser.ExpressionVisitor)">checkAgainstRequiredType</A></B>(<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor</A> visitor)</CODE>
<BR>
Check the select expression against the required type.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#computeEvaluationMode()">computeEvaluationMode</A></B>()</CODE>
<BR>
</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getCardinality()">getCardinality</A></B>()</CODE>
<BR>
Get the cardinality of the result of this instruction.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getColumnNumber()">getColumnNumber</A></B>()</CODE>
<BR>
Get the column number of the 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/Container.html" title="interface in net.sf.saxon.expr">Container</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getContainer()">getContainer</A></B>()</CODE>
<BR>
Get the container in which this expression is located.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getEvaluationMode()">getEvaluationMode</A></B>()</CODE>
<BR>
Get the evaluation mode of the variable</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../net/sf/saxon/expr/instruct/Executable.html" title="class in net.sf.saxon.expr.instruct">Executable</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getExecutable()">getExecutable</A></B>()</CODE>
<BR>
Get the executable containing 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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getInstructionNameCode()">getInstructionNameCode</A></B>()</CODE>
<BR>
Get the name of this instruction (that is xsl:variable, xsl:param etc) for diagnostics</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../net/sf/saxon/value/IntegerValue.html" title="class in net.sf.saxon.value">IntegerValue</A>[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getIntegerBoundsForVariable()">getIntegerBoundsForVariable</A></B>()</CODE>
<BR>
If the variable is bound to an integer, get the minimum and maximum possible values.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getLineNumber()">getLineNumber</A></B>()</CODE>
<BR>
Get the line number 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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getLocalSlotNumber()">getLocalSlotNumber</A></B>()</CODE>
<BR>
If this is a local variable held on the local stack frame, return the corresponding slot number.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getLocationId()">getLocationId</A></B>()</CODE>
<BR>
Get the location ID of the expression</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../net/sf/saxon/event/LocationProvider.html" title="interface in net.sf.saxon.event">LocationProvider</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getLocationProvider()">getLocationProvider</A></B>()</CODE>
<BR>
Get the LocationProvider allowing location identifiers to be resolved.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getPublicId()">getPublicId</A></B>()</CODE>
<BR>
Get the publicId of the module containing the expression (to satisfy the SourceLocator interface)</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getRequiredType()">getRequiredType</A></B>()</CODE>
<BR>
Get the required type of this variable</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getSelectExpression()">getSelectExpression</A></B>()</CODE>
<BR>
Get the expression to which this variable is bound</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../net/sf/saxon/om/ValueRepresentation.html" title="interface in net.sf.saxon.om">ValueRepresentation</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getSelectValue(net.sf.saxon.expr.XPathContext)">getSelectValue</A></B>(<A HREF="../../../../../net/sf/saxon/expr/XPathContext.html" title="interface in net.sf.saxon.expr">XPathContext</A> context)</CODE>
<BR>
Evaluate the variable.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getSlotNumber()">getSlotNumber</A></B>()</CODE>
<BR>
Get the slot number allocated to this variable</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getSystemId()">getSystemId</A></B>()</CODE>
<BR>
Get the systemId of the module containing the expression</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getSystemId(long)">getSystemId</A></B>(long locationId)</CODE>
<BR>
</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#getVariableQName()">getVariableQName</A></B>()</CODE>
<BR>
Get the name of this variable</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#init(net.sf.saxon.expr.Expression, net.sf.saxon.om.StructuredQName)">init</A></B>(<A HREF="../../../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> select,
<A HREF="../../../../../net/sf/saxon/om/StructuredQName.html" title="class in net.sf.saxon.om">StructuredQName</A> qName)</CODE>
<BR>
Initialize the properties of the variable</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#isAssignable()">isAssignable</A></B>()</CODE>
<BR>
Test whether it is permitted to assign to the variable using the saxon:assign
extension element.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#isGlobal()">isGlobal</A></B>()</CODE>
<BR>
Indicate whether the binding is local or global.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#isImplicitlyRequiredParam()">isImplicitlyRequiredParam</A></B>()</CODE>
<BR>
Ask whether this variable represents a parameter that is implicitly required, because there is no usable
default value</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#isRequiredParam()">isRequiredParam</A></B>()</CODE>
<BR>
Ask whether this variable represents a required parameter</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#isTunnelParam()">isTunnelParam</A></B>()</CODE>
<BR>
Ask whether this variable represents a tunnel parameter</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#iterateSubExpressions()">iterateSubExpressions</A></B>()</CODE>
<BR>
Get all the XPath expressions associated with this instruction
(in XSLT terms, the expression present on attributes of the instruction,
as distinct from the child instructions in a sequence construction)</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#optimize(net.sf.saxon.expr.parser.ExpressionVisitor, net.sf.saxon.expr.parser.ExpressionVisitor.ContextItemType)">optimize</A></B>(<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor</A> visitor,
<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.ContextItemType.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor.ContextItemType</A> contextItemType)</CODE>
<BR>
</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.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> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setAssignable(boolean)">setAssignable</A></B>(boolean assignable)</CODE>
<BR>
Indicate whether this variable is assignable using saxon:assign</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setContainer(net.sf.saxon.expr.Container)">setContainer</A></B>(<A HREF="../../../../../net/sf/saxon/expr/Container.html" title="interface in net.sf.saxon.expr">Container</A> container)</CODE>
<BR>
Mark a variable as being in a given Container.</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setImplicitlyRequiredParam(boolean)">setImplicitlyRequiredParam</A></B>(boolean requiredParam)</CODE>
<BR>
Indicate that this variable represents a parameter that is implicitly required (because there is no
usable default value)</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setLocationId(int)">setLocationId</A></B>(int id)</CODE>
<BR>
Set the location ID on 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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setReferenceCount(int)">setReferenceCount</A></B>(int refCount)</CODE>
<BR>
Set the nominal number of references to this variable</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setRequiredParam(boolean)">setRequiredParam</A></B>(boolean requiredParam)</CODE>
<BR>
Indicate that this variable represents a required parameter</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setRequiredType(net.sf.saxon.value.SequenceType)">setRequiredType</A></B>(<A HREF="../../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A> required)</CODE>
<BR>
Set the required type of this variable</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setSelectExpression(net.sf.saxon.expr.Expression)">setSelectExpression</A></B>(<A HREF="../../../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> select)</CODE>
<BR>
Set the expression to which this variable is bound</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setSlotNumber(int)">setSlotNumber</A></B>(int s)</CODE>
<BR>
Set the slot number of this variable</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setTunnel(boolean)">setTunnel</A></B>(boolean tunnel)</CODE>
<BR>
Indicate whether this variable represents a tunnel parameter</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#setVariableQName(net.sf.saxon.om.StructuredQName)">setVariableQName</A></B>(<A HREF="../../../../../net/sf/saxon/om/StructuredQName.html" title="class in net.sf.saxon.om">StructuredQName</A> s)</CODE>
<BR>
Set the name of the variable</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#simplify(net.sf.saxon.expr.parser.ExpressionVisitor)">simplify</A></B>(<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor</A> visitor)</CODE>
<BR>
Simplify this variable</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="../../../../../net/sf/saxon/expr/instruct/GeneralVariable.html#typeCheck(net.sf.saxon.expr.parser.ExpressionVisitor, net.sf.saxon.expr.parser.ExpressionVisitor.ContextItemType)">typeCheck</A></B>(<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor</A> visitor,
<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.ContextItemType.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor.ContextItemType</A> contextItemType)</CODE>
<BR>
</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#toString()" title="class or interface in java.lang">toString</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>
<A NAME="methods_inherited_from_class_net.sf.saxon.expr.Binding"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from interface net.sf.saxon.expr.<A HREF="../../../../../net/sf/saxon/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#evaluateVariable(net.sf.saxon.expr.XPathContext)">evaluateVariable</A></CODE></TD>
</TR>
</TABLE>
<P>
<!-- ============ FIELD DETAIL =========== -->
<A NAME="field_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>Field Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="variableQName"><!-- --></A><H3>
variableQName</H3>
<PRE>
protected <A HREF="../../../../../net/sf/saxon/om/StructuredQName.html" title="class in net.sf.saxon.om">StructuredQName</A> <B>variableQName</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>
<A NAME="slotNumber"><!-- --></A><H3>
slotNumber</H3>
<PRE>
protected int <B>slotNumber</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>
<A NAME="referenceCount"><!-- --></A><H3>
referenceCount</H3>
<PRE>
protected int <B>referenceCount</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>
<A NAME="evaluationMode"><!-- --></A><H3>
evaluationMode</H3>
<PRE>
protected int <B>evaluationMode</B></PRE>
<DL>
<DL>
</DL>
</DL>
<!-- ========= 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="GeneralVariable()"><!-- --></A><H3>
GeneralVariable</H3>
<PRE>
public <B>GeneralVariable</B>()</PRE>
<DL>
<DD>Create a general variable
<P>
</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="init(net.sf.saxon.expr.Expression, net.sf.saxon.om.StructuredQName)"><!-- --></A><H3>
init</H3>
<PRE>
public void <B>init</B>(<A HREF="../../../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> select,
<A HREF="../../../../../net/sf/saxon/om/StructuredQName.html" title="class in net.sf.saxon.om">StructuredQName</A> qName)</PRE>
<DL>
<DD>Initialize the properties of the variable
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>select</CODE> - the expression to which the variable is bound<DD><CODE>qName</CODE> - the name of the variable</DL>
</DD>
</DL>
<HR>
<A NAME="setContainer(net.sf.saxon.expr.Container)"><!-- --></A><H3>
setContainer</H3>
<PRE>
public void <B>setContainer</B>(<A HREF="../../../../../net/sf/saxon/expr/Container.html" title="interface in net.sf.saxon.expr">Container</A> container)</PRE>
<DL>
<DD>Mark a variable as being in a given Container. This link is used primarily for diagnostics:
the container links to the location map held in the executable.
<p>This affects the expression and all its subexpressions. Any subexpressions that are not in the
same container are marked with the new container, and this proceeds recursively. However, any
subexpression that is already in the correct container is not modified.</p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>container</CODE> - The container of this expression.</DL>
</DD>
</DL>
<HR>
<A NAME="getContainer()"><!-- --></A><H3>
getContainer</H3>
<PRE>
public <A HREF="../../../../../net/sf/saxon/expr/Container.html" title="interface in net.sf.saxon.expr">Container</A> <B>getContainer</B>()</PRE>
<DL>
<DD>Get the container in which this expression is located. This will usually be a top-level construct
such as a function or global variable, and XSLT template, or an XQueryExpression. In the case of
free-standing XPath expressions it will be the StaticContext object
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the expression's container</DL>
</DD>
</DL>
<HR>
<A NAME="setLocationId(int)"><!-- --></A><H3>
setLocationId</H3>
<PRE>
public void <B>setLocationId</B>(int id)</PRE>
<DL>
<DD>Set the location ID on an expression.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>id</CODE> - the location id</DL>
</DD>
</DL>
<HR>
<A NAME="getLocationId()"><!-- --></A><H3>
getLocationId</H3>
<PRE>
public final int <B>getLocationId</B>()</PRE>
<DL>
<DD>Get the location ID of the expression
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a location identifier, which can be turned into real
location information by reference to a location provider</DL>
</DD>
</DL>
<HR>
<A NAME="getLineNumber()"><!-- --></A><H3>
getLineNumber</H3>
<PRE>
public int <B>getLineNumber</B>()</PRE>
<DL>
<DD>Get the line number of the expression
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://download.oracle.com/javase/6/docs/api/javax/xml/transform/SourceLocator.html?is-external=true#getLineNumber()" title="class or interface in javax.xml.transform">getLineNumber</A></CODE> in interface <CODE><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></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getColumnNumber()"><!-- --></A><H3>
getColumnNumber</H3>
<PRE>
public int <B>getColumnNumber</B>()</PRE>
<DL>
<DD>Get the column number of the expression
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://download.oracle.com/javase/6/docs/api/javax/xml/transform/SourceLocator.html?is-external=true#getColumnNumber()" title="class or interface in javax.xml.transform">getColumnNumber</A></CODE> in interface <CODE><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></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getSystemId()"><!-- --></A><H3>
getSystemId</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>getSystemId</B>()</PRE>
<DL>
<DD>Get the systemId of the module containing the expression
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://download.oracle.com/javase/6/docs/api/javax/xml/transform/SourceLocator.html?is-external=true#getSystemId()" title="class or interface in javax.xml.transform">getSystemId</A></CODE> in interface <CODE><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></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getPublicId()"><!-- --></A><H3>
getPublicId</H3>
<PRE>
public final <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>getPublicId</B>()</PRE>
<DL>
<DD>Get the publicId of the module containing the expression (to satisfy the SourceLocator interface)
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://download.oracle.com/javase/6/docs/api/javax/xml/transform/SourceLocator.html?is-external=true#getPublicId()" title="class or interface in javax.xml.transform">getPublicId</A></CODE> in interface <CODE><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></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getExecutable()"><!-- --></A><H3>
getExecutable</H3>
<PRE>
public <A HREF="../../../../../net/sf/saxon/expr/instruct/Executable.html" title="class in net.sf.saxon.expr.instruct">Executable</A> <B>getExecutable</B>()</PRE>
<DL>
<DD>Get the executable containing this expression
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the containing Executable</DL>
</DD>
</DL>
<HR>
<A NAME="getLocationProvider()"><!-- --></A><H3>
getLocationProvider</H3>
<PRE>
public <A HREF="../../../../../net/sf/saxon/event/LocationProvider.html" title="interface in net.sf.saxon.event">LocationProvider</A> <B>getLocationProvider</B>()</PRE>
<DL>
<DD>Get the LocationProvider allowing location identifiers to be resolved.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the LocationProvider used to turn the location id into real location information</DL>
</DD>
</DL>
<HR>
<A NAME="getSystemId(long)"><!-- --></A><H3>
getSystemId</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>getSystemId</B>(long locationId)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="setSelectExpression(net.sf.saxon.expr.Expression)"><!-- --></A><H3>
setSelectExpression</H3>
<PRE>
public void <B>setSelectExpression</B>(<A HREF="../../../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> select)</PRE>
<DL>
<DD>Set the expression to which this variable is bound
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>select</CODE> - the initializing expression</DL>
</DD>
</DL>
<HR>
<A NAME="getSelectExpression()"><!-- --></A><H3>
getSelectExpression</H3>
<PRE>
public <A HREF="../../../../../net/sf/saxon/expr/Expression.html" title="class in net.sf.saxon.expr">Expression</A> <B>getSelectExpression</B>()</PRE>
<DL>
<DD>Get the expression to which this variable is bound
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the initializing expression</DL>
</DD>
</DL>
<HR>
<A NAME="setRequiredType(net.sf.saxon.value.SequenceType)"><!-- --></A><H3>
setRequiredType</H3>
<PRE>
public void <B>setRequiredType</B>(<A HREF="../../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A> required)</PRE>
<DL>
<DD>Set the required type of this variable
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>required</CODE> - the required type</DL>
</DD>
</DL>
<HR>
<A NAME="getRequiredType()"><!-- --></A><H3>
getRequiredType</H3>
<PRE>
public <A HREF="../../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A> <B>getRequiredType</B>()</PRE>
<DL>
<DD>Get the required type of this variable
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#getRequiredType()">getRequiredType</A></CODE> in interface <CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the required type</DL>
</DD>
</DL>
<HR>
<A NAME="getIntegerBoundsForVariable()"><!-- --></A><H3>
getIntegerBoundsForVariable</H3>
<PRE>
public <A HREF="../../../../../net/sf/saxon/value/IntegerValue.html" title="class in net.sf.saxon.value">IntegerValue</A>[] <B>getIntegerBoundsForVariable</B>()</PRE>
<DL>
<DD>If the variable is bound to an integer, get the minimum and maximum possible values.
Return null if unknown or not applicable
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#getIntegerBoundsForVariable()">getIntegerBoundsForVariable</A></CODE> in interface <CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a pair of integers containing the minimum and maximum values for the integer value;
or null if the value is not an integer or the range is unknown</DL>
</DD>
</DL>
<HR>
<A NAME="setAssignable(boolean)"><!-- --></A><H3>
setAssignable</H3>
<PRE>
public void <B>setAssignable</B>(boolean assignable)</PRE>
<DL>
<DD>Indicate whether this variable is assignable using saxon:assign
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>assignable</CODE> - true if this variable is assignable</DL>
</DD>
</DL>
<HR>
<A NAME="setRequiredParam(boolean)"><!-- --></A><H3>
setRequiredParam</H3>
<PRE>
public void <B>setRequiredParam</B>(boolean requiredParam)</PRE>
<DL>
<DD>Indicate that this variable represents a required parameter
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>requiredParam</CODE> - true if this is a required parameter</DL>
</DD>
</DL>
<HR>
<A NAME="setImplicitlyRequiredParam(boolean)"><!-- --></A><H3>
setImplicitlyRequiredParam</H3>
<PRE>
public void <B>setImplicitlyRequiredParam</B>(boolean requiredParam)</PRE>
<DL>
<DD>Indicate that this variable represents a parameter that is implicitly required (because there is no
usable default value)
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>requiredParam</CODE> - true if this is an implicitly required parameter</DL>
</DD>
</DL>
<HR>
<A NAME="setTunnel(boolean)"><!-- --></A><H3>
setTunnel</H3>
<PRE>
public void <B>setTunnel</B>(boolean tunnel)</PRE>
<DL>
<DD>Indicate whether this variable represents a tunnel parameter
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>tunnel</CODE> - true if this is a tunnel parameter</DL>
</DD>
</DL>
<HR>
<A NAME="setReferenceCount(int)"><!-- --></A><H3>
setReferenceCount</H3>
<PRE>
public void <B>setReferenceCount</B>(int refCount)</PRE>
<DL>
<DD>Set the nominal number of references to this variable
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>refCount</CODE> - the nominal number of references</DL>
</DD>
</DL>
<HR>
<A NAME="getEvaluationMode()"><!-- --></A><H3>
getEvaluationMode</H3>
<PRE>
public int <B>getEvaluationMode</B>()</PRE>
<DL>
<DD>Get the evaluation mode of the variable
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the evaluation mode (a constant in <A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionTool.html" title="class in net.sf.saxon.expr.parser"><CODE>ExpressionTool</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="isAssignable()"><!-- --></A><H3>
isAssignable</H3>
<PRE>
public final boolean <B>isAssignable</B>()</PRE>
<DL>
<DD>Test whether it is permitted to assign to the variable using the saxon:assign
extension element. This will only be true if the extra attribute saxon:assignable="yes"
is present.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#isAssignable()">isAssignable</A></CODE> in interface <CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if the binding is assignable</DL>
</DD>
</DL>
<HR>
<A NAME="getCardinality()"><!-- --></A><H3>
getCardinality</H3>
<PRE>
public int <B>getCardinality</B>()</PRE>
<DL>
<DD>Get the cardinality of the result of this instruction. An xsl:variable instruction returns nothing, so the
type is empty.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the empty cardinality.</DL>
</DD>
</DL>
<HR>
<A NAME="isGlobal()"><!-- --></A><H3>
isGlobal</H3>
<PRE>
public boolean <B>isGlobal</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#isGlobal()">Binding</A></CODE></B></DD>
<DD>Indicate whether the binding is local or global. A global binding is one that has a fixed
value for the life of a query or transformation; any other binding is local.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#isGlobal()">isGlobal</A></CODE> in interface <CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if the binding is global</DL>
</DD>
</DL>
<HR>
<A NAME="getLocalSlotNumber()"><!-- --></A><H3>
getLocalSlotNumber</H3>
<PRE>
public int <B>getLocalSlotNumber</B>()</PRE>
<DL>
<DD>If this is a local variable held on the local stack frame, return the corresponding slot number.
In other cases, return -1.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#getLocalSlotNumber()">getLocalSlotNumber</A></CODE> in interface <CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the slot number on the local stack frame</DL>
</DD>
</DL>
<HR>
<A NAME="isRequiredParam()"><!-- --></A><H3>
isRequiredParam</H3>
<PRE>
public final boolean <B>isRequiredParam</B>()</PRE>
<DL>
<DD>Ask whether this variable represents a required parameter
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if this is a required parameter</DL>
</DD>
</DL>
<HR>
<A NAME="isImplicitlyRequiredParam()"><!-- --></A><H3>
isImplicitlyRequiredParam</H3>
<PRE>
public final boolean <B>isImplicitlyRequiredParam</B>()</PRE>
<DL>
<DD>Ask whether this variable represents a parameter that is implicitly required, because there is no usable
default value
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if this variable is an implicitly required parameter</DL>
</DD>
</DL>
<HR>
<A NAME="isTunnelParam()"><!-- --></A><H3>
isTunnelParam</H3>
<PRE>
public final boolean <B>isTunnelParam</B>()</PRE>
<DL>
<DD>Ask whether this variable represents a tunnel parameter
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if this is a tunnel parameter</DL>
</DD>
</DL>
<HR>
<A NAME="getInstructionNameCode()"><!-- --></A><H3>
getInstructionNameCode</H3>
<PRE>
public int <B>getInstructionNameCode</B>()</PRE>
<DL>
<DD>Get the name of this instruction (that is xsl:variable, xsl:param etc) for diagnostics
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the name of this instruction, as a name pool name code</DL>
</DD>
</DL>
<HR>
<A NAME="simplify(net.sf.saxon.expr.parser.ExpressionVisitor)"><!-- --></A><H3>
simplify</H3>
<PRE>
public void <B>simplify</B>(<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor</A> visitor)
throws <A HREF="../../../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE>
<DL>
<DD>Simplify this variable
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>visitor</CODE> - an 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 a failure occurs</DL>
</DD>
</DL>
<HR>
<A NAME="typeCheck(net.sf.saxon.expr.parser.ExpressionVisitor, net.sf.saxon.expr.parser.ExpressionVisitor.ContextItemType)"><!-- --></A><H3>
typeCheck</H3>
<PRE>
public void <B>typeCheck</B>(<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor</A> visitor,
<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.ContextItemType.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor.ContextItemType</A> contextItemType)
throws <A HREF="../../../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE>
<DL>
<DD><DL>
</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></DL>
</DD>
</DL>
<HR>
<A NAME="optimize(net.sf.saxon.expr.parser.ExpressionVisitor, net.sf.saxon.expr.parser.ExpressionVisitor.ContextItemType)"><!-- --></A><H3>
optimize</H3>
<PRE>
public void <B>optimize</B>(<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor</A> visitor,
<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.ContextItemType.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor.ContextItemType</A> contextItemType)
throws <A HREF="../../../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE>
<DL>
<DD><DL>
</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></DL>
</DD>
</DL>
<HR>
<A NAME="computeEvaluationMode()"><!-- --></A><H3>
computeEvaluationMode</H3>
<PRE>
public void <B>computeEvaluationMode</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</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>Copy an expression. This makes a deep copy.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the copy of the original expression</DL>
</DD>
</DL>
<HR>
<A NAME="addReference(boolean)"><!-- --></A><H3>
addReference</H3>
<PRE>
public void <B>addReference</B>(boolean isLoopingReference)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#addReference(boolean)">Binding</A></CODE></B></DD>
<DD>Register a variable reference that refers to the variable bound in this expression
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#addReference(boolean)">addReference</A></CODE> in interface <CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>isLoopingReference</CODE> - - true if the reference occurs within a loop, such as the predicate
of a filter expression</DL>
</DD>
</DL>
<HR>
<A NAME="checkAgainstRequiredType(net.sf.saxon.expr.parser.ExpressionVisitor)"><!-- --></A><H3>
checkAgainstRequiredType</H3>
<PRE>
public void <B>checkAgainstRequiredType</B>(<A HREF="../../../../../net/sf/saxon/expr/parser/ExpressionVisitor.html" title="class in net.sf.saxon.expr.parser">ExpressionVisitor</A> visitor)
throws <A HREF="../../../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE>
<DL>
<DD>Check the select expression against the required type.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>visitor</CODE> - an expression visitor
<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 check fails</DL>
</DD>
</DL>
<HR>
<A NAME="getSelectValue(net.sf.saxon.expr.XPathContext)"><!-- --></A><H3>
getSelectValue</H3>
<PRE>
public <A HREF="../../../../../net/sf/saxon/om/ValueRepresentation.html" title="interface in net.sf.saxon.om">ValueRepresentation</A> <B>getSelectValue</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>Evaluate the variable. That is,
get the value of the select expression if present or the content
of the element otherwise, either as a tree or as a sequence
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>context</CODE> - the XPath dynamic context
<DT><B>Returns:</B><DD>the result of evaluating the variable
<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 of the select expression fails
with a dynamic error</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>Get all the XPath expressions associated with this instruction
(in XSLT terms, the expression present on attributes of the instruction,
as distinct from the child instructions in a sequence construction)
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>an iterator over all the contained expressions (in practice,
the select 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>Replace one subexpression by a replacement subexpression
<P>
<DD><DL>
</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="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>Diagnostic print of expression structure. The abstract expression tree
is written to the supplied output destination.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>out</CODE> - the object used to present the output</DL>
</DD>
</DL>
<HR>
<A NAME="getSlotNumber()"><!-- --></A><H3>
getSlotNumber</H3>
<PRE>
public int <B>getSlotNumber</B>()</PRE>
<DL>
<DD>Get the slot number allocated to this variable
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the slot number, that is the position allocated to the variable on its stack frame</DL>
</DD>
</DL>
<HR>
<A NAME="setSlotNumber(int)"><!-- --></A><H3>
setSlotNumber</H3>
<PRE>
public void <B>setSlotNumber</B>(int s)</PRE>
<DL>
<DD>Set the slot number of this variable
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - the slot number, that is, the position allocated to this variable on its stack frame</DL>
</DD>
</DL>
<HR>
<A NAME="setVariableQName(net.sf.saxon.om.StructuredQName)"><!-- --></A><H3>
setVariableQName</H3>
<PRE>
public void <B>setVariableQName</B>(<A HREF="../../../../../net/sf/saxon/om/StructuredQName.html" title="class in net.sf.saxon.om">StructuredQName</A> s)</PRE>
<DL>
<DD>Set the name of the variable
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - the name of the variable (a QName)</DL>
</DD>
</DL>
<HR>
<A NAME="getVariableQName()"><!-- --></A><H3>
getVariableQName</H3>
<PRE>
public <A HREF="../../../../../net/sf/saxon/om/StructuredQName.html" title="class in net.sf.saxon.om">StructuredQName</A> <B>getVariableQName</B>()</PRE>
<DL>
<DD>Get the name of this variable
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html#getVariableQName()">getVariableQName</A></CODE> in interface <CODE><A HREF="../../../../../net/sf/saxon/expr/Binding.html" title="interface in net.sf.saxon.expr">Binding</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the name of this variable (a QName)</DL>
</DD>
</DL>
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