Package org.loboevolution.apache.xpath.operations

Class Bool

java.lang.Object

org.loboevolution.apache.xpath.Expression

org.loboevolution.apache.xpath.operations.UnaryOperation

org.loboevolution.apache.xpath.operations.Bool

All Implemented Interfaces:

SourceLocator, ExpressionNode, XPathVisitable

public class Bool
extends UnaryOperation

The 'boolean()' operation expression executer.

Field Summary

Fields inherited from class org.loboevolution.apache.xpath.operations.UnaryOperation

m_right

Constructor Summary

Constructors

Constructor	Description
Bool()

Method Summary

Modifier and Type	Method	Description
boolean	bool(XPathContext xctxt)	Evaluate expression to a boolean.
XObject	operate(XObject right)	Apply the operation to two operands, and return the result.

Methods inherited from class org.loboevolution.apache.xpath.operations.UnaryOperation

callVisitors, canTraverseOutsideSubtree, deepEquals, execute, setRight

Methods inherited from class org.loboevolution.apache.xpath.Expression

asIterator, asNode, assertion, error, execute, execute, execute, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isSameClass, isStableNumber, num

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Bool

public Bool()

Method Details

operate

public XObject operate(XObject right)
                throws 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:

TransformerException - in case of error

bool

public boolean bool(XPathContext xctxt)
             throws TransformerException

Evaluate expression to a boolean.

Overrides:

bool in class Expression

Parameters:

xctxt - The XPath runtime context.

Returns:

false

Throws:

TransformerException - if any