org.quattor.pan.dml.operators
Class Sub

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

All Implemented Interfaces:

Operation

public final class Sub
extends AbstractOperation

Implements a subtract operation for longs and doubles. If one of the arguments is a double, then the result is a double. Otherwise, the result is a long.

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 Element	execute(NumberProperty a, NumberProperty b)
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

execute

public static Element execute(NumberProperty a,
                              NumberProperty b)