org.quattor.pan.dml.operators
Class SelfNestedListVariable

java.lang.Object
  org.quattor.pan.dml.AbstractOperation
      org.quattor.pan.dml.operators.ListVariable
          org.quattor.pan.dml.operators.NestedListVariable
              org.quattor.pan.dml.operators.SelfNestedListVariable

All Implemented Interfaces:

Operation

public class SelfNestedListVariable
extends NestedListVariable

Looks up a nested variable in the execution context. There must be at least one index (operation).

Author:

loomis

Field Summary

Fields inherited from class org.quattor.pan.dml.operators.ListVariable

identifier

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

ops, sourceRange

Constructor Summary

SelfNestedListVariable(SourceRange sourceRange, Operation... operations)

Method Summary

void	checkInvalidSelfContext() Default implementation recursively calls this method on all of the contained operations (arguments).
Element	execute(Context context) Execute this operation within the given context.

Methods inherited from class org.quattor.pan.dml.operators.NestedListVariable

toString

Methods inherited from class org.quattor.pan.dml.operators.ListVariable

getInstance, getInstance

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

calculateArgs, calculateTerms, checkRestrictedContext, getOperations, getSourceRange

Methods inherited from class java.lang.Object

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

Constructor Detail

SelfNestedListVariable

public SelfNestedListVariable(SourceRange sourceRange,
                              Operation... operations)

Method Detail

checkInvalidSelfContext

public void checkInvalidSelfContext()
                             throws SyntaxException

Description copied from class: AbstractOperation

Default implementation recursively calls this method on all of the contained operations (arguments). Subclasses that reference SELF should override this method and throw a SyntaxException.

Specified by:

checkInvalidSelfContext in interface Operation

Overrides:

checkInvalidSelfContext in class AbstractOperation

Throws:

SyntaxException - if operation references SELF

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

Overrides:

execute in class NestedListVariable

Parameters:

context - evaluation context for the statement

Returns:

Element produced by running operation