/**
* Return the first node out of the nodeset, if this expression is a nodeset expression. This is
* the default implementation for nodesets.
*
* <p>WARNING: Do not mutate this class from this function!
*
* @param xctxt The XPath runtime context.
* @return the first node out of the nodeset, or DTM.NULL.
*/
public int asNode(XPathContext xctxt) throws javax.xml.transform.TransformerException {
int current = xctxt.getCurrentNode();
DTM dtm = xctxt.getDTM(current);
return dtm.getFirstChild(current);
}
/**
* Get the match score of the given node.
*
* @param xctxt XPath runtime context.
* @param context The current source tree context node.
* @return score, one of {@link #MATCH_SCORE_NODETEST}, {@link #MATCH_SCORE_NONE}, {@link
* #MATCH_SCORE_OTHER}, or {@link #MATCH_SCORE_QNAME}.
* @throws javax.xml.transform.TransformerException
*/
public double getMatchScore(XPathContext xctxt, int context)
throws javax.xml.transform.TransformerException {
xctxt.pushCurrentNode(context);
xctxt.pushCurrentExpressionNode(context);
try {
XObject score = m_mainExp.execute(xctxt);
if (DEBUG_MATCHES) {
DTM dtm = xctxt.getDTM(context);
System.out.println(
"score: "
+ score.num()
+ " for "
+ dtm.getNodeName(context)
+ " for xpath "
+ this.getPatternString());
}
return score.num();
} finally {
xctxt.popCurrentNode();
xctxt.popCurrentExpressionNode();
}
// return XPath.MATCH_SCORE_NONE;
}
/**
* 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 = getArg0AsNode(xctxt);
if (DTM.NULL == context) return XString.EMPTYSTRING;
DTM dtm = xctxt.getDTM(context);
String s = (context != DTM.NULL) ? dtm.getLocalName(context) : "";
if (s.startsWith("#") || s.equals("xmlns")) return XString.EMPTYSTRING;
return new XString(s);
}
/**
* Execute the first argument expression that is expected to return a string. If the argument is
* null, then get the string value from the current context node.
*
* @param xctxt Runtime XPath context.
* @return The string value of the first argument, or the string value of the current context node
* if the first argument is null.
* @throws javax.xml.transform.TransformerException if an error occurs while executing the
* argument expression.
*/
protected XMLString getArg0AsString(XPathContext xctxt)
throws javax.xml.transform.TransformerException {
if (null == m_arg0) {
int currentNode = xctxt.getCurrentNode();
if (DTM.NULL == currentNode) return XString.EMPTYSTRING;
else {
DTM dtm = xctxt.getDTM(currentNode);
return dtm.getStringValue(currentNode);
}
} else return m_arg0.execute(xctxt).xstr();
}
/**
* Execute the first argument expression that is expected to return a number. If the argument is
* null, then get the number value from the current context node.
*
* @param xctxt Runtime XPath context.
* @return The number value of the first argument, or the number value of the current context node
* if the first argument is null.
* @throws javax.xml.transform.TransformerException if an error occurs while executing the
* argument expression.
*/
protected double getArg0AsNumber(XPathContext xctxt)
throws javax.xml.transform.TransformerException {
if (null == m_arg0) {
int currentNode = xctxt.getCurrentNode();
if (DTM.NULL == currentNode) return 0;
else {
DTM dtm = xctxt.getDTM(currentNode);
XMLString str = dtm.getStringValue(currentNode);
return str.toDouble();
}
} else return m_arg0.execute(xctxt).num();
}
/**
* Try to create a DOM source tree from the input source.
*
* @param source The Source object that identifies the source node.
* @param locator The location of the caller, for diagnostic purposes.
* @return non-null reference to node identified by the source argument.
* @throws TransformerException if the source argument can not be resolved to a source node.
*/
public int parseToNode(Source source, SourceLocator locator, XPathContext xctxt)
throws TransformerException {
try {
Object xowner = xctxt.getOwnerObject();
DTM dtm;
if (null != xowner && xowner instanceof com.sun.org.apache.xml.internal.dtm.DTMWSFilter) {
dtm =
xctxt.getDTM(
source,
false,
(com.sun.org.apache.xml.internal.dtm.DTMWSFilter) xowner,
false,
true);
} else {
dtm = xctxt.getDTM(source, false, null, false, true);
}
return dtm.getDocument();
} catch (Exception e) {
// e.printStackTrace();
throw new TransformerException(e.getMessage(), locator, e);
}
}
/**
* Set the root node of the TreeWalker. (Not part of the DOM2 TreeWalker interface).
*
* @param root The context node of this step.
*/
public void setRoot(int root) {
// %OPT% Get this directly from the lpi.
XPathContext xctxt = wi().getXPathContext();
m_dtm = xctxt.getDTM(root);
m_traverser = m_dtm.getAxisTraverser(m_axis);
m_isFresh = true;
m_foundLast = false;
m_root = root;
m_currentNode = root;
if (DTM.NULL == root) {
throw new RuntimeException(
XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_SETTING_WALKER_ROOT_TO_NULL,
null)); // "\n !!!! Error! Setting the root of a walker to null!!!");
}
resetProximityPositions();
}
/**
* 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 whereNode = getArg0AsNode(xctxt);
String fileLocation = null;
if (DTM.NULL != whereNode) {
DTM dtm = xctxt.getDTM(whereNode);
// %REVIEW%
if (DTM.DOCUMENT_FRAGMENT_NODE == dtm.getNodeType(whereNode)) {
whereNode = dtm.getFirstChild(whereNode);
}
if (DTM.NULL != whereNode) {
fileLocation = dtm.getDocumentBaseURI();
// int owner = dtm.getDocument();
// fileLocation = xctxt.getSourceTreeManager().findURIFromDoc(owner);
}
}
return new XString((null != fileLocation) ? fileLocation : "");
}
