org.apache.xpath.operations
Class Number

java.lang.Object
  |
  +--org.apache.xpath.Expression
        |
        +--org.apache.xpath.operations.UnaryOperation
              |
              +--org.apache.xpath.operations.Number

public class Number
extends UnaryOperation

The 'number()' operation expression executer.

See Also:
Serialized Form

Constructor Summary
Number()
           
 
Method Summary
 double num(XPathContext xctxt)
          Evaluate this operation directly to a double.
 XObject operate(XObject right)
          Apply the operation to two operands, and return the result.
 
Methods inherited from class org.apache.xpath.operations.UnaryOperation
callVisitors, canTraverseOutsideSubtree, deepEquals, execute, fixupVariables, getExpression, getOperand, setExpression, setRight
 
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, warn, xstr
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Number

public Number()
Method Detail

operate

public XObject operate(XObject right)
                throws TransformerException
Apply the operation to two operands, and return the result.
Parameters:
right - non-null reference to the evaluated right operand.
Returns:
non-null reference to the XObject that represents the result of the operation.
Throws:
TransformerException -  
Overrides:
operate in class UnaryOperation

num

public double num(XPathContext xctxt)
           throws TransformerException
Evaluate this operation directly to a double.
Parameters:
xctxt - The runtime execution context.
Returns:
The result of the operation as a double.
Throws:
TransformerException -  
Overrides:
num in class Expression


Copyright 2006 Apache XML Project. All Rights Reserved.