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MemoFunction
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SUMMARY: NESTED | <A HREF="#fields_inherited_from_class_net.sf.saxon.expr.instruct.UserFunction">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
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com.saxonica.expr</FONT>
<BR>
Class MemoFunction</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/instruct/Procedure.html" title="class in net.sf.saxon.expr.instruct">net.sf.saxon.expr.instruct.Procedure</A>
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html" title="class in net.sf.saxon.expr.instruct">net.sf.saxon.expr.instruct.UserFunction</A>
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>com.saxonica.expr.MemoFunction</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/expr/Container.html" title="interface in net.sf.saxon.expr">Container</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>MemoFunction</B><DT>extends <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html" title="class in net.sf.saxon.expr.instruct">UserFunction</A></DL>
</PRE>
<P>
A user-defined function that is declared as a memo function, meaning that it remembers results
of previous calls.
<P>
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../serialized-form.html#com.saxonica.expr.MemoFunction">Serialized Form</A></DL>
<HR>
<P>
<!-- =========== FIELD SUMMARY =========== -->
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<A NAME="fields_inherited_from_class_net.sf.saxon.expr.instruct.UserFunction"><!-- --></A>
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<TH ALIGN="left"><B>Fields inherited from class net.sf.saxon.expr.instruct.<A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html" title="class in net.sf.saxon.expr.instruct">UserFunction</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#evaluationMode">evaluationMode</A></CODE></TD>
</TR>
</TABLE>
<A NAME="fields_inherited_from_class_net.sf.saxon.expr.instruct.Procedure"><!-- --></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.instruct.<A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html" title="class in net.sf.saxon.expr.instruct">Procedure</A></B></TH>
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<TD><CODE><A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#body">body</A></CODE></TD>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<TD><CODE><B><A HREF="../../../com/saxonica/expr/MemoFunction.html#MemoFunction()">MemoFunction</A></B>()</CODE>
<BR>
</TD>
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<!-- ========== METHOD SUMMARY =========== -->
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<B>Method Summary</B></FONT></TH>
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<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="../../../com/saxonica/expr/MemoFunction.html#call(net.sf.saxon.om.ValueRepresentation[], net.sf.saxon.expr.XPathContextMajor)">call</A></B>(<A HREF="../../../net/sf/saxon/om/ValueRepresentation.html" title="interface in net.sf.saxon.om">ValueRepresentation</A>[] actualArgs,
<A HREF="../../../net/sf/saxon/expr/XPathContextMajor.html" title="class in net.sf.saxon.expr">XPathContextMajor</A> context)</CODE>
<BR>
Call this function to return a value.</TD>
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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="../../../com/saxonica/expr/MemoFunction.html#computeEvaluationMode()">computeEvaluationMode</A></B>()</CODE>
<BR>
Determine the preferred evaluation mode for this function</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/expr/MemoFunction.html#isMemoFunction()">isMemoFunction</A></B>()</CODE>
<BR>
Ask whether this function is a memo function</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_net.sf.saxon.expr.instruct.UserFunction"><!-- --></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.instruct.<A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html" title="class in net.sf.saxon.expr.instruct">UserFunction</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#call(net.sf.saxon.om.ValueRepresentation[], net.sf.saxon.Controller)">call</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#callUpdating(net.sf.saxon.om.ValueRepresentation[], net.sf.saxon.expr.XPathContextMajor, net.sf.saxon.expr.PendingUpdateList)">callUpdating</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#containsTailCalls()">containsTailCalls</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#gatherDirectContributingCallees(java.util.Set)">gatherDirectContributingCallees</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#getArgumentType(int)">getArgumentType</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#getConstructType()">getConstructType</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#getDeclaredResultType()">getDeclaredResultType</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#getEvaluationMode()">getEvaluationMode</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#getFunctionName()">getFunctionName</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#getNumberOfArguments()">getNumberOfArguments</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#getObjectName()">getObjectName</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#getParameterDefinitions()">getParameterDefinitions</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#getResultType(net.sf.saxon.type.TypeHierarchy)">getResultType</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#isInlineable()">isInlineable</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#isTailRecursive()">isTailRecursive</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#isUpdating()">isUpdating</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#iterateEvents(net.sf.saxon.om.ValueRepresentation[], net.sf.saxon.expr.XPathContextMajor)">iterateEvents</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#process(net.sf.saxon.om.ValueRepresentation[], net.sf.saxon.expr.XPathContextMajor)">process</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#setFunctionName(net.sf.saxon.om.StructuredQName)">setFunctionName</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#setInlineable(boolean)">setInlineable</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#setParameterDefinitions(net.sf.saxon.expr.instruct.UserFunctionParameter[])">setParameterDefinitions</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#setResultType(net.sf.saxon.value.SequenceType)">setResultType</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#setTailRecursive(boolean, boolean)">setTailRecursive</A>, <A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#setUpdating(boolean)">setUpdating</A></CODE></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_net.sf.saxon.expr.instruct.Procedure"><!-- --></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.instruct.<A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html" title="class in net.sf.saxon.expr.instruct">Procedure</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getBody()">getBody</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getColumnNumber()">getColumnNumber</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getColumnNumber(long)">getColumnNumber</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getContainerGranularity()">getContainerGranularity</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getExecutable()">getExecutable</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getHostLanguage()">getHostLanguage</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getLineNumber()">getLineNumber</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getLineNumber(long)">getLineNumber</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getLocationProvider()">getLocationProvider</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getProperties()">getProperties</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getProperty(java.lang.String)">getProperty</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getPublicId()">getPublicId</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getStackFrameMap()">getStackFrameMap</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getSystemId()">getSystemId</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#getSystemId(long)">getSystemId</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#setBody(net.sf.saxon.expr.Expression)">setBody</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#setExecutable(net.sf.saxon.expr.instruct.Executable)">setExecutable</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#setHostLanguage(int)">setHostLanguage</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#setLineNumber(int)">setLineNumber</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#setStackFrameMap(net.sf.saxon.expr.instruct.SlotManager)">setStackFrameMap</A>, <A HREF="../../../net/sf/saxon/expr/instruct/Procedure.html#setSystemId(java.lang.String)">setSystemId</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#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>
<P>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
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<B>Constructor Detail</B></FONT></TH>
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<A NAME="MemoFunction()"><!-- --></A><H3>
MemoFunction</H3>
<PRE>
public <B>MemoFunction</B>()</PRE>
<DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
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<A NAME="computeEvaluationMode()"><!-- --></A><H3>
computeEvaluationMode</H3>
<PRE>
public void <B>computeEvaluationMode</B>()</PRE>
<DL>
<DD>Determine the preferred evaluation mode for this function
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#computeEvaluationMode()">computeEvaluationMode</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html" title="class in net.sf.saxon.expr.instruct">UserFunction</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="isMemoFunction()"><!-- --></A><H3>
isMemoFunction</H3>
<PRE>
public boolean <B>isMemoFunction</B>()</PRE>
<DL>
<DD>Ask whether this function is a memo function
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#isMemoFunction()">isMemoFunction</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html" title="class in net.sf.saxon.expr.instruct">UserFunction</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if this function is marked as a memo function</DL>
</DD>
</DL>
<HR>
<A NAME="call(net.sf.saxon.om.ValueRepresentation[], net.sf.saxon.expr.XPathContextMajor)"><!-- --></A><H3>
call</H3>
<PRE>
public <A HREF="../../../net/sf/saxon/om/ValueRepresentation.html" title="interface in net.sf.saxon.om">ValueRepresentation</A> <B>call</B>(<A HREF="../../../net/sf/saxon/om/ValueRepresentation.html" title="interface in net.sf.saxon.om">ValueRepresentation</A>[] actualArgs,
<A HREF="../../../net/sf/saxon/expr/XPathContextMajor.html" title="class in net.sf.saxon.expr">XPathContextMajor</A> context)
throws <A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE>
<DL>
<DD>Call this function to return a value.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html#call(net.sf.saxon.om.ValueRepresentation[], net.sf.saxon.expr.XPathContextMajor)">call</A></CODE> in class <CODE><A HREF="../../../net/sf/saxon/expr/instruct/UserFunction.html" title="class in net.sf.saxon.expr.instruct">UserFunction</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>actualArgs</CODE> - the arguments supplied to the function. These must have the correct
types required by the function signature (it is the caller's responsibility to check this).
It is acceptable to supply a <A HREF="../../../net/sf/saxon/value/Closure.html" title="class in net.sf.saxon.value"><CODE>Closure</CODE></A> to represent a value whose
evaluation will be delayed until it is needed. The array must be the correct size to match
the number of arguments: again, it is the caller's responsibility to check this.<DD><CODE>context</CODE> - This provides the run-time context for evaluating the function. It is the caller's
responsibility to allocate a "clean" context for the function to use; the context that is provided
will be overwritten by the function.
<DT><B>Returns:</B><DD>a Value representing the result of the function.
<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 while evaluating the function</DL>
</DD>
</DL>
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