/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: ExsltSets.java,v 1.1.2.1 2005/08/01 02:08:50 jeffsuttor Exp $
*/
/**
* This class contains EXSLT set extension functions.
* It is accessed by specifying a namespace URI as follows:
* <pre>
* xmlns:set="http://exslt.org/sets"
* </pre>
*
* The documentation for each function has been copied from the relevant
* EXSLT Implementer page.
*
* @see <a href="http://www.exslt.org/">EXSLT</a>
* @xsl.usage general
*/
{
/**
* The set:leading function returns the nodes in the node set passed as the first argument that
* precede, in document order, the first node in the node set passed as the second argument. If
* the first node in the second node set is not contained in the first node set, then an empty
* node set is returned. If the second node set is empty, then the first node set is returned.
*
* @param nl1 NodeList for first node-set.
* @param nl2 NodeList for second node-set.
* @return a NodeList containing the nodes in nl1 that precede in document order the first
* node in nl2; an empty node-set if the first node in nl2 is not in nl1; all of nl1 if nl2
* is empty.
*
* @see <a href="http://www.exslt.org/">EXSLT</a>
*/
{
return nl1;
return leadNodes; // empty NodeSet
{
}
return leadNodes;
}
/**
* The set:trailing function returns the nodes in the node set passed as the first argument that
* follow, in document order, the first node in the node set passed as the second argument. If
* the first node in the second node set is not contained in the first node set, then an empty
* node set is returned. If the second node set is empty, then the first node set is returned.
*
* @param nl1 NodeList for first node-set.
* @param nl2 NodeList for second node-set.
* @return a NodeList containing the nodes in nl1 that follow in document order the first
* node in nl2; an empty node-set if the first node in nl2 is not in nl1; all of nl1 if nl2
* is empty.
*
* @see <a href="http://www.exslt.org/">EXSLT</a>
*/
{
return nl1;
return trailNodes; // empty NodeSet
{
}
return trailNodes;
}
/**
* The set:intersection function returns a node set comprising the nodes that are within
* both the node sets passed as arguments to it.
*
* @param nl1 NodeList for first node-set.
* @param nl2 NodeList for second node-set.
* @return a NodeList containing the nodes in nl1 that are also
* in nl2.
*
* @see <a href="http://www.exslt.org/">EXSLT</a>
*/
{
inter.setShouldCacheNodes(true);
{
inter.addElement(n);
}
return inter;
}
/**
* The set:difference function returns the difference between two node sets - those nodes that
* are in the node set passed as the first argument that are not in the node set passed as the
* second argument.
*
* @param nl1 NodeList for first node-set.
* @param nl2 NodeList for second node-set.
* @return a NodeList containing the nodes in nl1 that are not in nl2.
*
* @see <a href="http://www.exslt.org/">EXSLT</a>
*/
{
diff.setShouldCacheNodes(true);
{
diff.addElement(n);
}
return diff;
}
/**
* The set:distinct function returns a subset of the nodes contained in the node-set NS passed
* as the first argument. Specifically, it selects a node N if there is no node in NS that has
* the same string value as N, and that precedes N in document order.
*
* @param nl NodeList for the node-set.
* @return a NodeList with nodes from nl containing distinct string values.
* In other words, if more than one node in nl contains the same string value,
* only include the first such node found.
*
* @see <a href="http://www.exslt.org/">EXSLT</a>
*/
{
dist.setShouldCacheNodes(true);
{
{
}
}
return dist;
}
/**
* The set:has-same-node function returns true if the node set passed as the first argument shares
* any nodes with the node set passed as the second argument. If there are no nodes that are in both
* node sets, then it returns false.
*
* The Xalan extensions MethodResolver converts 'has-same-node' to 'hasSameNode'.
*
* Note: Not to be confused with hasSameNodes in the Xalan namespace, which returns true if
* the two node sets contain the exactly the same nodes (perhaps in a different order),
* otherwise false.
*
* @see <a href="http://www.exslt.org/">EXSLT</a>
*/
{
{
return true;
}
return false;
}
}