org.apache.xpath.operations
Class And

java.lang.Object
  org.apache.xpath.Expression
      org.apache.xpath.operations.Operation
          org.apache.xpath.operations.And

All Implemented Interfaces:

ExpressionNode, ExpressionOwner, Serializable, javax.xml.transform.SourceLocator, XPathVisitable

public class And

extends Operation

The 'and' operation expression executer.

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class org.apache.xpath.operations.Operation

Operation.LeftExprOwner

Field Summary

Fields inherited from class org.apache.xpath.operations.Operation

m_left, m_right

Fields inherited from class org.apache.xpath.Expression

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, 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

And

public And()

Method Detail

execute

public XObject execute(XPathContext xctxt)
                throws javax.xml.transform.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:

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