org.apache.xpath.operations
Class Bool

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

public class Bool
extends UnaryOperation

The 'boolean()' operation expression executer.

See Also:
Serialized Form

Constructor Summary
Bool()
           
 
Method Summary
 boolean bool(XPathContext xctxt)
          Evaluate this operation directly to a boolean.
 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, 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

Bool

public Bool()
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

bool

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


Copyright 2006 Apache XML Project. All Rights Reserved.