org.apache.xpath.operations
Class Bool

java.lang.Object
  extended byorg.apache.xpath.Expression
      extended byorg.apache.xpath.operations.UnaryOperation
          extended byorg.apache.xpath.operations.Bool
All Implemented Interfaces:
ExpressionNode, ExpressionOwner, Serializable, javax.xml.transform.SourceLocator, XPathVisitable

public class Bool
extends UnaryOperation

The 'boolean()' operation expression executer.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.apache.xpath.operations.UnaryOperation
m_right
 
Fields inherited from class org.apache.xpath.Expression
 
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, 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

Bool

public Bool()
Method Detail

operate

public XObject operate(XObject right)
                throws javax.xml.transform.TransformerException
Apply the operation to two operands, and return the result.

Specified by:
operate in class UnaryOperation
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:
javax.xml.transform.TransformerException

bool

public boolean bool(XPathContext xctxt)
             throws javax.xml.transform.TransformerException
Evaluate this operation directly to a boolean.

Overrides:
bool in class Expression
Parameters:
xctxt - The runtime execution context.
Returns:
The result of the operation as a boolean.
Throws:
javax.xml.transform.TransformerException