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| org.apache.xalan.lib</FONT> | |
| <BR> | |
| Class ExsltDynamic</H2> | |
| <PRE> | |
| java.lang.Object | |
| <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../org/apache/xalan/lib/ExsltBase.html" title="class in org.apache.xalan.lib">org.apache.xalan.lib.ExsltBase</A> | |
| <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.xalan.lib.ExsltDynamic</B> | |
| </PRE> | |
| <HR> | |
| <DL> | |
| <DT><PRE>public class <A HREF="../../../../src-html/org/apache/xalan/lib/ExsltDynamic.html#line.61"><B>ExsltDynamic</B></A><DT>extends <A HREF="../../../../org/apache/xalan/lib/ExsltBase.html" title="class in org.apache.xalan.lib">ExsltBase</A></DL> | |
| </PRE> | |
| <P> | |
| This class contains EXSLT dynamic extension functions. | |
| It is accessed by specifying a namespace URI as follows: | |
| <pre> | |
| xmlns:dyn="http://exslt.org/dynamic" | |
| </pre> | |
| The documentation for each function has been copied from the relevant | |
| EXSLT Implementer page. | |
| <P> | |
| <P> | |
| <DL> | |
| <DT><B>See Also:</B><DD><a href="http://www.exslt.org/">EXSLT</a></DL> | |
| <HR> | |
| <P> | |
| <!-- =========== FIELD SUMMARY =========== --> | |
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| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>static java.lang.String</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../org/apache/xalan/lib/ExsltDynamic.html#EXSL_URI">EXSL_URI</A></B></CODE> | |
| <BR> | |
| </TD> | |
| </TR> | |
| </TABLE> | |
| | |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> | |
| <A NAME="constructor_summary"><!-- --></A> | |
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| <B>Constructor Summary</B></FONT></TH> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD><CODE><B><A HREF="../../../../org/apache/xalan/lib/ExsltDynamic.html#ExsltDynamic()">ExsltDynamic</A></B>()</CODE> | |
| <BR> | |
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| | |
| <!-- ========== METHOD SUMMARY =========== --> | |
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| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>static org.w3c.dom.NodeList</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../org/apache/xalan/lib/ExsltDynamic.html#closure(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)">closure</A></B>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr)</CODE> | |
| <BR> | |
| The dyn:closure function creates a node set resulting from transitive closure of | |
| evaluating the expression passed as the second argument on each of the nodes passed | |
| as the first argument, then on the node set resulting from that and so on until no | |
| more nodes are found.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>static <A HREF="../../../../org/apache/xpath/objects/XObject.html" title="class in org.apache.xpath.objects">XObject</A></CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../org/apache/xalan/lib/ExsltDynamic.html#evaluate(org.apache.xalan.extensions.ExpressionContext, java.lang.String)">evaluate</A></B>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| java.lang.String xpathExpr)</CODE> | |
| <BR> | |
| The dyn:evaluate function evaluates a string as an XPath expression and returns | |
| the resulting value, which might be a boolean, number, string, node set, result | |
| tree fragment or external object.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>static org.w3c.dom.NodeList</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../org/apache/xalan/lib/ExsltDynamic.html#map(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)">map</A></B>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr)</CODE> | |
| <BR> | |
| The dyn:map function evaluates the expression passed as the second argument for | |
| each of the nodes passed as the first argument, and returns a node set of those values.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>static double</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../org/apache/xalan/lib/ExsltDynamic.html#max(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)">max</A></B>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr)</CODE> | |
| <BR> | |
| The dyn:max function calculates the maximum value for the nodes passed as | |
| the first argument, where the value of each node is calculated dynamically | |
| using an XPath expression passed as a string as the second argument.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>static double</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../org/apache/xalan/lib/ExsltDynamic.html#min(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)">min</A></B>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr)</CODE> | |
| <BR> | |
| The dyn:min function calculates the minimum value for the nodes passed as the | |
| first argument, where the value of each node is calculated dynamically using | |
| an XPath expression passed as a string as the second argument.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>static double</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../org/apache/xalan/lib/ExsltDynamic.html#sum(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)">sum</A></B>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr)</CODE> | |
| <BR> | |
| The dyn:sum function calculates the sum for the nodes passed as the first argument, | |
| where the value of each node is calculated dynamically using an XPath expression | |
| passed as a string as the second argument.</TD> | |
| </TR> | |
| </TABLE> | |
| <A NAME="methods_inherited_from_class_org.apache.xalan.lib.ExsltBase"><!-- --></A> | |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
| <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> | |
| <TH ALIGN="left"><B>Methods inherited from class org.apache.xalan.lib.<A HREF="../../../../org/apache/xalan/lib/ExsltBase.html" title="class in org.apache.xalan.lib">ExsltBase</A></B></TH> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD><CODE><A HREF="../../../../org/apache/xalan/lib/ExsltBase.html#toNumber(org.w3c.dom.Node)">toNumber</A>, <A HREF="../../../../org/apache/xalan/lib/ExsltBase.html#toString(org.w3c.dom.Node)">toString</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.Object</B></TH> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</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="EXSL_URI"><!-- --></A><H3> | |
| EXSL_URI</H3> | |
| <PRE> | |
| public static final java.lang.String <A HREF="../../../../src-html/org/apache/xalan/lib/ExsltDynamic.html#line.64"><B>EXSL_URI</B></A></PRE> | |
| <DL> | |
| <DL> | |
| <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.xalan.lib.ExsltDynamic.EXSL_URI">Constant Field Values</A></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="ExsltDynamic()"><!-- --></A><H3> | |
| ExsltDynamic</H3> | |
| <PRE> | |
| public <A HREF="../../../../src-html/org/apache/xalan/lib/ExsltDynamic.html#line.61"><B>ExsltDynamic</B></A>()</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="max(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)"><!-- --></A><H3> | |
| max</H3> | |
| <PRE> | |
| public static double <A HREF="../../../../src-html/org/apache/xalan/lib/ExsltDynamic.html#line.99"><B>max</B></A>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr) | |
| throws org.xml.sax.SAXNotSupportedException</PRE> | |
| <DL> | |
| <DD>The dyn:max function calculates the maximum value for the nodes passed as | |
| the first argument, where the value of each node is calculated dynamically | |
| using an XPath expression passed as a string as the second argument. | |
| <p> | |
| The expressions are evaluated relative to the nodes passed as the first argument. | |
| In other words, the value for each node is calculated by evaluating the XPath | |
| expression with all context information being the same as that for the call to | |
| the dyn:max function itself, except for the following: | |
| <p> | |
| <ul> | |
| <li>the context node is the node whose value is being calculated.</li> | |
| <li>the context position is the position of the node within the node set passed as | |
| the first argument to the dyn:max function, arranged in document order.</li> | |
| <li>the context size is the number of nodes passed as the first argument to the | |
| dyn:max function.</li> | |
| </ul> | |
| <p> | |
| The dyn:max function returns the maximum of these values, calculated in exactly | |
| the same way as for math:max. | |
| <p> | |
| If the expression string passed as the second argument is an invalid XPath | |
| expression (including an empty string), this function returns NaN. | |
| <p> | |
| This function must take a second argument. To calculate the maximum of a set of | |
| nodes based on their string values, you should use the math:max function. | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>myContext</CODE> - The ExpressionContext passed by the extension processor<DD><CODE>nl</CODE> - The node set<DD><CODE>expr</CODE> - The expression string | |
| <DT><B>Returns:</B><DD>The maximum evaluation value | |
| <DT><B>Throws:</B> | |
| <DD><CODE>org.xml.sax.SAXNotSupportedException</CODE></DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="min(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)"><!-- --></A><H3> | |
| min</H3> | |
| <PRE> | |
| public static double <A HREF="../../../../src-html/org/apache/xalan/lib/ExsltDynamic.html#line.180"><B>min</B></A>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr) | |
| throws org.xml.sax.SAXNotSupportedException</PRE> | |
| <DL> | |
| <DD>The dyn:min function calculates the minimum value for the nodes passed as the | |
| first argument, where the value of each node is calculated dynamically using | |
| an XPath expression passed as a string as the second argument. | |
| <p> | |
| The expressions are evaluated relative to the nodes passed as the first argument. | |
| In other words, the value for each node is calculated by evaluating the XPath | |
| expression with all context information being the same as that for the call to | |
| the dyn:min function itself, except for the following: | |
| <p> | |
| <ul> | |
| <li>the context node is the node whose value is being calculated.</li> | |
| <li>the context position is the position of the node within the node set passed | |
| as the first argument to the dyn:min function, arranged in document order.</li> | |
| <li>the context size is the number of nodes passed as the first argument to the | |
| dyn:min function.</li> | |
| </ul> | |
| <p> | |
| The dyn:min function returns the minimum of these values, calculated in exactly | |
| the same way as for math:min. | |
| <p> | |
| If the expression string passed as the second argument is an invalid XPath expression | |
| (including an empty string), this function returns NaN. | |
| <p> | |
| This function must take a second argument. To calculate the minimum of a set of | |
| nodes based on their string values, you should use the math:min function. | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>myContext</CODE> - The ExpressionContext passed by the extension processor<DD><CODE>nl</CODE> - The node set<DD><CODE>expr</CODE> - The expression string | |
| <DT><B>Returns:</B><DD>The minimum evaluation value | |
| <DT><B>Throws:</B> | |
| <DD><CODE>org.xml.sax.SAXNotSupportedException</CODE></DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="sum(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)"><!-- --></A><H3> | |
| sum</H3> | |
| <PRE> | |
| public static double <A HREF="../../../../src-html/org/apache/xalan/lib/ExsltDynamic.html#line.261"><B>sum</B></A>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr) | |
| throws org.xml.sax.SAXNotSupportedException</PRE> | |
| <DL> | |
| <DD>The dyn:sum function calculates the sum for the nodes passed as the first argument, | |
| where the value of each node is calculated dynamically using an XPath expression | |
| passed as a string as the second argument. | |
| <p> | |
| The expressions are evaluated relative to the nodes passed as the first argument. | |
| In other words, the value for each node is calculated by evaluating the XPath | |
| expression with all context information being the same as that for the call to | |
| the dyn:sum function itself, except for the following: | |
| <p> | |
| <ul> | |
| <li>the context node is the node whose value is being calculated.</li> | |
| <li>the context position is the position of the node within the node set passed as | |
| the first argument to the dyn:sum function, arranged in document order.</li> | |
| <li>the context size is the number of nodes passed as the first argument to the | |
| dyn:sum function.</li> | |
| </ul> | |
| <p> | |
| The dyn:sum function returns the sumimum of these values, calculated in exactly | |
| the same way as for sum. | |
| <p> | |
| If the expression string passed as the second argument is an invalid XPath | |
| expression (including an empty string), this function returns NaN. | |
| <p> | |
| This function must take a second argument. To calculate the sumimum of a set of | |
| nodes based on their string values, you should use the sum function. | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>myContext</CODE> - The ExpressionContext passed by the extension processor<DD><CODE>nl</CODE> - The node set<DD><CODE>expr</CODE> - The expression string | |
| <DT><B>Returns:</B><DD>The sum of the evaluation value on each node | |
| <DT><B>Throws:</B> | |
| <DD><CODE>org.xml.sax.SAXNotSupportedException</CODE></DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="map(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)"><!-- --></A><H3> | |
| map</H3> | |
| <PRE> | |
| public static org.w3c.dom.NodeList <A HREF="../../../../src-html/org/apache/xalan/lib/ExsltDynamic.html#line.363"><B>map</B></A>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr) | |
| throws org.xml.sax.SAXNotSupportedException</PRE> | |
| <DL> | |
| <DD>The dyn:map function evaluates the expression passed as the second argument for | |
| each of the nodes passed as the first argument, and returns a node set of those values. | |
| <p> | |
| The expressions are evaluated relative to the nodes passed as the first argument. | |
| In other words, the value for each node is calculated by evaluating the XPath | |
| expression with all context information being the same as that for the call to | |
| the dyn:map function itself, except for the following: | |
| <p> | |
| <ul> | |
| <li>The context node is the node whose value is being calculated.</li> | |
| <li>the context position is the position of the node within the node set passed | |
| as the first argument to the dyn:map function, arranged in document order.</li> | |
| <li>the context size is the number of nodes passed as the first argument to the | |
| dyn:map function.</li> | |
| </ul> | |
| <p> | |
| If the expression string passed as the second argument is an invalid XPath | |
| expression (including an empty string), this function returns an empty node set. | |
| <p> | |
| If the XPath expression evaluates as a node set, the dyn:map function returns | |
| the union of the node sets returned by evaluating the expression for each of the | |
| nodes in the first argument. Note that this may mean that the node set resulting | |
| from the call to the dyn:map function contains a different number of nodes from | |
| the number in the node set passed as the first argument to the function. | |
| <p> | |
| If the XPath expression evaluates as a number, the dyn:map function returns a | |
| node set containing one exsl:number element (namespace http://exslt.org/common) | |
| for each node in the node set passed as the first argument to the dyn:map function, | |
| in document order. The string value of each exsl:number element is the same as | |
| the result of converting the number resulting from evaluating the expression to | |
| a string as with the number function, with the exception that Infinity results | |
| in an exsl:number holding the highest number the implementation can store, and | |
| -Infinity results in an exsl:number holding the lowest number the implementation | |
| can store. | |
| <p> | |
| If the XPath expression evaluates as a boolean, the dyn:map function returns a | |
| node set containing one exsl:boolean element (namespace http://exslt.org/common) | |
| for each node in the node set passed as the first argument to the dyn:map function, | |
| in document order. The string value of each exsl:boolean element is 'true' if the | |
| expression evaluates as true for the node, and '' if the expression evaluates as | |
| false. | |
| <p> | |
| Otherwise, the dyn:map function returns a node set containing one exsl:string | |
| element (namespace http://exslt.org/common) for each node in the node set passed | |
| as the first argument to the dyn:map function, in document order. The string | |
| value of each exsl:string element is the same as the result of converting the | |
| result of evaluating the expression for the relevant node to a string as with | |
| the string function. | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>myContext</CODE> - The ExpressionContext passed by the extension processor<DD><CODE>nl</CODE> - The node set<DD><CODE>expr</CODE> - The expression string | |
| <DT><B>Returns:</B><DD>The node set after evaluation | |
| <DT><B>Throws:</B> | |
| <DD><CODE>org.xml.sax.SAXNotSupportedException</CODE></DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="evaluate(org.apache.xalan.extensions.ExpressionContext, java.lang.String)"><!-- --></A><H3> | |
| evaluate</H3> | |
| <PRE> | |
| public static <A HREF="../../../../org/apache/xpath/objects/XObject.html" title="class in org.apache.xpath.objects">XObject</A> <A HREF="../../../../src-html/org/apache/xalan/lib/ExsltDynamic.html#line.462"><B>evaluate</B></A>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| java.lang.String xpathExpr) | |
| throws org.xml.sax.SAXNotSupportedException</PRE> | |
| <DL> | |
| <DD>The dyn:evaluate function evaluates a string as an XPath expression and returns | |
| the resulting value, which might be a boolean, number, string, node set, result | |
| tree fragment or external object. The sole argument is the string to be evaluated. | |
| <p> | |
| If the expression string passed as the second argument is an invalid XPath | |
| expression (including an empty string), this function returns an empty node set. | |
| <p> | |
| You should only use this function if the expression must be constructed dynamically, | |
| otherwise it is much more efficient to use the expression literally. | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>myContext</CODE> - The ExpressionContext passed by the extension processor<DD><CODE>xpathExpr</CODE> - The XPath expression string | |
| <DT><B>Returns:</B><DD>The evaluation result | |
| <DT><B>Throws:</B> | |
| <DD><CODE>org.xml.sax.SAXNotSupportedException</CODE></DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="closure(org.apache.xalan.extensions.ExpressionContext, org.w3c.dom.NodeList, java.lang.String)"><!-- --></A><H3> | |
| closure</H3> | |
| <PRE> | |
| public static org.w3c.dom.NodeList <A HREF="../../../../src-html/org/apache/xalan/lib/ExsltDynamic.html#line.530"><B>closure</B></A>(<A HREF="../../../../org/apache/xalan/extensions/ExpressionContext.html" title="interface in org.apache.xalan.extensions">ExpressionContext</A> myContext, | |
| org.w3c.dom.NodeList nl, | |
| java.lang.String expr) | |
| throws org.xml.sax.SAXNotSupportedException</PRE> | |
| <DL> | |
| <DD>The dyn:closure function creates a node set resulting from transitive closure of | |
| evaluating the expression passed as the second argument on each of the nodes passed | |
| as the first argument, then on the node set resulting from that and so on until no | |
| more nodes are found. For example: | |
| <pre> | |
| dyn:closure(., '*') | |
| </pre> | |
| returns all the descendant elements of the node (its element children, their | |
| children, their children's children and so on). | |
| <p> | |
| The expression is thus evaluated several times, each with a different node set | |
| acting as the context of the expression. The first time the expression is | |
| evaluated, the context node set is the first argument passed to the dyn:closure | |
| function. In other words, the node set for each node is calculated by evaluating | |
| the XPath expression with all context information being the same as that for | |
| the call to the dyn:closure function itself, except for the following: | |
| <p> | |
| <ul> | |
| <li>the context node is the node whose value is being calculated.</li> | |
| <li>the context position is the position of the node within the node set passed | |
| as the first argument to the dyn:closure function, arranged in document order.</li> | |
| <li>the context size is the number of nodes passed as the first argument to the | |
| dyn:closure function.</li> | |
| <li>the current node is the node whose value is being calculated.</li> | |
| </ul> | |
| <p> | |
| The result for a particular iteration is the union of the node sets resulting | |
| from evaluting the expression for each of the nodes in the source node set for | |
| that iteration. This result is then used as the source node set for the next | |
| iteration, and so on. The result of the function as a whole is the union of | |
| the node sets generated by each iteration. | |
| <p> | |
| If the expression string passed as the second argument is an invalid XPath | |
| expression (including an empty string) or an expression that does not return a | |
| node set, this function returns an empty node set. | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>myContext</CODE> - The ExpressionContext passed by the extension processor<DD><CODE>nl</CODE> - The node set<DD><CODE>expr</CODE> - The expression string | |
| <DT><B>Returns:</B><DD>The node set after evaluation | |
| <DT><B>Throws:</B> | |
| <DD><CODE>org.xml.sax.SAXNotSupportedException</CODE></DL> | |
| </DD> | |
| </DL> | |
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