org.quattor.pan.dml.operators
Class Foreach

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

All Implemented Interfaces:

Operation

public final class Foreach
extends AbstractOperation

Implements a foreach loop that allows iteration over all elements in a resource without having to explicitly create an iterator. Structural changes to the resource during the iteration are not permitted.

Author:

loomis

Field Summary

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

ops, sourceRange

Constructor Summary

Foreach(SourceRange sourceRange, Operation... ops)

Method Summary

Element

execute(Context context) Execute this operation within the given context.

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

Constructor Detail

Foreach

public Foreach(SourceRange sourceRange,
               Operation... ops)

Method Detail

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