org.apache.xpath.operations
Class And

java.lang.Object
  extended byorg.apache.xpath.Expression
      extended byorg.apache.xpath.operations.Operation
          extended byorg.apache.xpath.operations.And
All Implemented Interfaces:
ExpressionNode, ExpressionOwner, java.io.Serializable, SourceLocator, XPathVisitable

public class And
extends Operation

The 'and' operation expression executer.

See Also:
Serialized Form

Constructor Summary
And()
           
 
Method Summary
 boolean bool(XPathContext xctxt)
          Evaluate this operation directly to a boolean.
 XObject execute(XPathContext xctxt)
          AND two expressions and return the boolean result.
 
Methods inherited from class org.apache.xpath.operations.Operation
callVisitors, canTraverseOutsideSubtree, deepEquals, fixupVariables, getExpression, getLeftOperand, getRightOperand, operate, setExpression, setLeftRight
 
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

And

public And()
Method Detail

execute

public XObject execute(XPathContext xctxt)
                throws TransformerException
AND two expressions and return the boolean result. Override superclass method for optimization purposes.

Overrides:
execute in class Operation
Parameters:
xctxt - The runtime execution context.
Returns:
XBoolean.S_TRUE or XBoolean.S_FALSE.
Throws:
TransformerException

bool

public boolean bool(XPathContext xctxt)
             throws 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:
TransformerException


Copyright ? 2004 Apache XML Project. All Rights Reserved.