org.apache.xpath.operations

Class Equals

java.lang.Object

org.apache.xpath.Expression

org.apache.xpath.operations.Operation

org.apache.xpath.operations.Equals

All Implemented Interfaces:

Serializable, SourceLocator, ExpressionNode, ExpressionOwner, XPathVisitable

public class Equals
extends Operation

The '=' operation expression executer.

See Also:

Serialized Form

Field Summary

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

m_left, m_right

Constructor Summary

Constructors

Constructor and Description
Equals()

Method Summary

Modifier and Type	Method and Description
boolean	bool(XPathContext xctxt) Execute a binary operation by calling execute on each of the operands, and then calling the operate method on the derived class.
XObject	operate(XObject left, XObject right) Apply the operation to two operands, and return the result.

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

callVisitors, canTraverseOutsideSubtree, deepEquals, execute, fixupVariables, getExpression, getLeftOperand, getRightOperand, 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

Equals

public Equals()

Method Detail

operate

public XObject operate(XObject left,
                       XObject right)
                throws TransformerException

Apply the operation to two operands, and return the result.

Overrides:

operate in class Operation

Parameters:

left - non-null reference to the evaluated left operand.

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

bool

public boolean bool(XPathContext xctxt)
             throws TransformerException

Execute a binary operation by calling execute on each of the operands, and then calling the operate method on the derived class.

Overrides:

bool in class Expression

Parameters:

xctxt - The runtime execution context.

Returns:

The XObject result of the operation.

Throws:

TransformerException