org.apache.xml.security.transforms.implementations
Class FuncHere

java.lang.Object
  org.apache.xpath.Expression
      org.apache.xpath.functions.Function
          org.apache.xml.security.transforms.implementations.FuncHere

All Implemented Interfaces:

Serializable, SourceLocator, org.apache.xpath.ExpressionNode, org.apache.xpath.XPathVisitable

public class FuncHere
extends org.apache.xpath.functions.Function

The 'here()' function returns a node-set containing the attribute or processing instruction node or the parent element of the text node that directly bears the XPath expression. This expression results in an error if the containing XPath expression does not appear in the same XML document against which the XPath expression is being evaluated. Mainpart is stolen from FuncId.java This does crash under Xalan2.2.D7 and works under Xalan2.2.D9 To get this baby to work, a special trick has to be used. The function needs access to the Node where the XPath expression has been defined. This is done by constructing a FuncHere which has this Node as 'owner'.

See Also:

"http://www.w3.org/Signature/Drafts/xmldsig-core/Overview.html#function-here", Serialized Form

Constructor Summary

FuncHere()

Method Summary

org.apache.xpath.objects.XObject	execute(org.apache.xpath.XPathContext xctxt) The here function returns a node-set containing the attribute or processing instruction node or the parent element of the text node that directly bears the XPath expression.
void	fixupVariables(Vector vars, int globalsSize) No arguments to process, so this does nothing.

Methods inherited from class org.apache.xpath.functions.Function

callArgVisitors, callVisitors, checkNumberArgs, deepEquals, postCompileStep, reportWrongNumberArgs, setArg

Methods inherited from class org.apache.xpath.Expression

asIterator, asIteratorRaw, asNode, assertion, bool, canTraverseOutsideSubtree, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isSameClass, isStableNumber, num, warn, xstr

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FuncHere

public FuncHere()

Method Detail

execute

public org.apache.xpath.objects.XObject execute(org.apache.xpath.XPathContext xctxt)
                                         throws TransformerException

The here function returns a node-set containing the attribute or processing instruction node or the parent element of the text node that directly bears the XPath expression. This expression results in an error if the containing XPath expression does not appear in the same XML document against which the XPath expression is being evaluated.

Overrides:

execute in class org.apache.xpath.functions.Function

Parameters:

xctxt -

Returns:

the xobject

Throws:

TransformerException

fixupVariables

public void fixupVariables(Vector vars,
                           int globalsSize)

No arguments to process, so this does nothing.

Specified by:

fixupVariables in class org.apache.xpath.Expression

Parameters:

vars -

globalsSize -