org.apache.xpath.functions
Class FuncConcat

java.lang.Object
  extended byorg.apache.xpath.Expression
      extended byorg.apache.xpath.functions.Function
          extended byorg.apache.xpath.functions.FunctionOneArg
              extended byorg.apache.xpath.functions.Function2Args
                  extended byorg.apache.xpath.functions.Function3Args
                      extended byorg.apache.xpath.functions.FunctionMultiArgs
                          extended byorg.apache.xpath.functions.FuncConcat
All Implemented Interfaces:
ExpressionNode, ExpressionOwner, java.io.Serializable, SourceLocator, XPathVisitable

public class FuncConcat
extends FunctionMultiArgs

Execute the Concat() function.

See Also:
Serialized Form
Usage:
**For advanced use only**

Constructor Summary
FuncConcat()
           
 
Method Summary
 void checkNumberArgs(int argNum)
          Check that the number of arguments passed to this function is correct.
 XObject execute(XPathContext xctxt)
          Execute the function.
 
Methods inherited from class org.apache.xpath.functions.FunctionMultiArgs
callArgVisitors, canTraverseOutsideSubtree, deepEquals, fixupVariables, getArgs, setArg
 
Methods inherited from class org.apache.xpath.functions.Function3Args
getArg2
 
Methods inherited from class org.apache.xpath.functions.Function2Args
getArg1
 
Methods inherited from class org.apache.xpath.functions.FunctionOneArg
getArg0, getExpression, setExpression
 
Methods inherited from class org.apache.xpath.functions.Function
callVisitors, postCompileStep
 
Methods inherited from class org.apache.xpath.Expression
asIterator, asIteratorRaw, asNode, assertion, bool, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isStableNumber, num, warn, xstr
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FuncConcat

public FuncConcat()
Method Detail

execute

public XObject execute(XPathContext xctxt)
                throws TransformerException
Execute the function. The function must return a valid object.

Overrides:
execute in class Function
Parameters:
xctxt - The current execution context.
Returns:
A valid XObject.
Throws:
TransformerException

checkNumberArgs

public void checkNumberArgs(int argNum)
                     throws WrongNumberArgsException
Check that the number of arguments passed to this function is correct.

Overrides:
checkNumberArgs in class FunctionMultiArgs
Parameters:
argNum - The number of arguments that is being passed to the function.
Throws:
WrongNumberArgsException


Copyright ? 2004 Apache XML Project. All Rights Reserved.