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FuncId.javaAPI DocJava SE 6 API4448Tue Jun 10 00:23:14 BST 2008com.sun.org.apache.xpath.internal.functions

FuncId

public class FuncId extends FunctionOneArg
Execute the Id() function.
xsl.usage
advanced

Fields Summary
static final long
serialVersionUID
Constructors Summary
Methods Summary
public com.sun.org.apache.xpath.internal.objects.XObjectexecute(com.sun.org.apache.xpath.internal.XPathContext xctxt)
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


    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;
private com.sun.org.apache.xml.internal.utils.StringVectorgetNodesByID(com.sun.org.apache.xpath.internal.XPathContext xctxt, int docContext, java.lang.String refval, com.sun.org.apache.xml.internal.utils.StringVector usedrefs, com.sun.org.apache.xpath.internal.NodeSetDTM nodeSet, boolean mayBeMore)
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.


                                                                                       
       
                                       
                                       
  

    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;