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package com.sun.org.apache.xpath.internal.functions;

import java.util.StringTokenizer;

import com.sun.org.apache.xml.internal.dtm.DTM;
import com.sun.org.apache.xml.internal.dtm.DTMIterator;
import com.sun.org.apache.xml.internal.utils.StringVector;
import com.sun.org.apache.xpath.internal.NodeSetDTM;
import com.sun.org.apache.xpath.internal.XPathContext;
import com.sun.org.apache.xpath.internal.objects.XNodeSet;
import com.sun.org.apache.xpath.internal.objects.XObject;
import com.sun.org.apache.xpath.internal.res.XPATHErrorResources;

Execute the Id() function.
@xsl.usageadvanced
/** * Execute the Id() function. * @xsl.usage advanced */
public class FuncId extends FunctionOneArg { static final long serialVersionUID = 8930573966143567310L;
Fill in a list with nodes that match a space delimited list if ID ID references.
Params:
  • xctxt – The runtime XPath context.
  • docContext – The document where the nodes are being looked for.
  • refval – A space delimited list of ID references.
  • usedrefs – List of references for which nodes were found.
  • nodeSet – Node set where the nodes will be added to.
  • mayBeMore – true if there is another set of nodes to be looked for.
Returns:The usedrefs value.
/** * Fill in a list with nodes that match a space delimited list if ID * ID references. * * @param xctxt The runtime XPath context. * @param docContext The document where the nodes are being looked for. * @param refval A space delimited list of ID references. * @param usedrefs List of references for which nodes were found. * @param nodeSet Node set where the nodes will be added to. * @param mayBeMore true if there is another set of nodes to be looked for. * * @return The usedrefs value. */
private StringVector getNodesByID(XPathContext xctxt, int docContext, String refval, StringVector usedrefs, NodeSetDTM nodeSet, boolean mayBeMore) { if (null != refval) { String ref = null; // DOMHelper dh = xctxt.getDOMHelper(); StringTokenizer tokenizer = new StringTokenizer(refval); boolean hasMore = tokenizer.hasMoreTokens(); DTM dtm = xctxt.getDTM(docContext); while (hasMore) { ref = tokenizer.nextToken(); hasMore = tokenizer.hasMoreTokens(); if ((null != usedrefs) && usedrefs.contains(ref)) { ref = null; continue; } int node = dtm.getElementById(ref); if (DTM.NULL != node) nodeSet.addNodeInDocOrder(node, xctxt); if ((null != ref) && (hasMore || mayBeMore)) { if (null == usedrefs) usedrefs = new StringVector(); usedrefs.addElement(ref); } } } return usedrefs; }
Execute the function. The function must return a valid object.
Params:
  • xctxt – The current execution context.
Throws:
Returns:A valid XObject.
/** * Execute the function. The function must return * a valid object. * @param xctxt The current execution context. * @return A valid XObject. * * @throws javax.xml.transform.TransformerException */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException { int context = xctxt.getCurrentNode(); DTM dtm = xctxt.getDTM(context); int docContext = dtm.getDocument(); if (DTM.NULL == docContext) error(xctxt, XPATHErrorResources.ER_CONTEXT_HAS_NO_OWNERDOC, null); XObject arg = m_arg0.execute(xctxt); int argType = arg.getType(); XNodeSet nodes = new XNodeSet(xctxt.getDTMManager()); NodeSetDTM nodeSet = nodes.mutableNodeset(); if (XObject.CLASS_NODESET == argType) { DTMIterator ni = arg.iter(); StringVector usedrefs = null; int pos = ni.nextNode(); while (DTM.NULL != pos) { DTM ndtm = ni.getDTM(pos); String refval = ndtm.getStringValue(pos).toString(); pos = ni.nextNode(); usedrefs = getNodesByID(xctxt, docContext, refval, usedrefs, nodeSet, DTM.NULL != pos); } // ni.detach(); } else if (XObject.CLASS_NULL == argType) { return nodes; } else { String refval = arg.str(); getNodesByID(xctxt, docContext, refval, null, nodeSet, false); } return nodes; } }