net.sourceforge.htmlunit.xpath.operations

Class Plus

java.lang.Object

net.sourceforge.htmlunit.xpath.Expression

net.sourceforge.htmlunit.xpath.operations.Operation

net.sourceforge.htmlunit.xpath.operations.Plus

All Implemented Interfaces:

SourceLocator, ExpressionNode, XPathVisitable

public class Plus
extends Operation

The '+' operation expression executer.

Field Summary

Fields inherited from class net.sourceforge.htmlunit.xpath.operations.Operation

m_left, m_right

Constructor Summary

Constructors

Constructor and Description
Plus()

Method Summary

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

Methods inherited from class net.sourceforge.htmlunit.xpath.operations.Operation

callVisitors, canTraverseOutsideSubtree, deepEquals, execute, setLeftRight

Methods inherited from class net.sourceforge.htmlunit.xpath.Expression

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

Methods inherited from class java.lang.Object

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

Constructor Detail

Plus

public Plus()

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 - in case of error

num

public double num(XPathContext xctxt)
           throws TransformerException

Evaluate expression to a number.

Overrides:

num in class Expression

Parameters:

xctxt - The XPath runtime context.

Returns:

The expression evaluated as a double.

Throws:

TransformerException - if any