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| javax.xml.xpath</FONT>
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| Interface XPathFunction</H2>
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| <DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../org/apache/xalan/extensions/XPathFunctionImpl.html">XPathFunctionImpl</A></DD>
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| <DT>public interface <B>XPathFunction</B></DL>
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| <p><code>XPathFunction</code> provides access to XPath functions.</p> |
| |
| <p>Functions are identified by QName and arity in XPath.</p>
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| <DT><B>Since: </B><DD>1.5</DD>
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| <CODE> java.lang.Object</CODE></FONT></TD>
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| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFunction.html#evaluate(java.util.List)">evaluate</A></B>(java.util.List args)</CODE>
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| Evaluate the function with the specified arguments.</TD>
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| evaluate</H3>
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| <PRE>
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| public java.lang.Object <B>evaluate</B>(java.util.List args) |
| throws <A HREF="../../../javax/xml/xpath/XPathFunctionException.html">XPathFunctionException</A></PRE>
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| <DL>
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| <DD><p>Evaluate the function with the specified arguments.</p> |
| |
| <p>To the greatest extent possible, side-effects should be avoided in the |
| definition of extension functions. The implementation evaluating an |
| XPath expression is under no obligation to call extension functions in |
| any particular order or any particular number of times.</p><DD><DL>
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| <DT><B>Parameters:</B><DD><CODE>args</CODE> - The arguments, <code>null</code> is a valid value.<DT><B>Returns:</B><DD>The result of evaluating the <code>XPath</code> function as an <code>Object</code>.<DT><B>Throws:</B><DD><A HREF="../../../javax/xml/xpath/XPathFunctionException.html">XPathFunctionException</A> - If <code>args</code> cannot be evaluated with this <code>XPath</code> function.</DL>
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