org.quattor.pan.dml.operators
Class While

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

All Implemented Interfaces:

Operation

public final class While
extends AbstractOperation

Implements a while operation. If the body of the loop is never run, the result is Undef; otherwise, the result is that of the last operation executed in the body of the loop.

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