org.quattor.pan.dml.operators
Class UnaryPlus

java.lang.Object
  org.quattor.pan.dml.AbstractOperation
      org.quattor.pan.dml.operators.UnaryPlus

All Implemented Interfaces:

Operation

public final class UnaryPlus
extends AbstractOperation

Implements a unary plus operation for symmetry with the unary minus. Note that this effectively has the same effect as using the is_number function, except that the result is the unchanged value.

Author:

loomis

Field Summary

Fields inherited from class org.quattor.pan.dml.AbstractOperation

ops, sourceRange

Method Summary

Element	execute(Context context) Execute this operation within the given context.
static Operation	newOperation(SourceRange sourceRange, Operation... ops)

Methods inherited from class org.quattor.pan.dml.AbstractOperation

calculateArgs, calculateTerms, checkInvalidSelfContext, checkRestrictedContext, getOperations, getSourceRange, toString

Methods inherited from class java.lang.Object

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

Method Detail

newOperation

public static Operation newOperation(SourceRange sourceRange,
                                     Operation... ops)
                              throws SyntaxException

Throws:

SyntaxException

execute

public Element execute(Context context)

Description copied from interface: Operation

Execute this operation within the given context. If an error occurs, an EvaluationException will be thrown with the details.

Specified by:

execute in interface Operation

Specified by:

execute in class AbstractOperation

Parameters:

context - evaluation context for the statement

Returns:

Element produced by running operation