org.quattor.pan.dml.operators
Class NestedVariable

java.lang.Object
  org.quattor.pan.dml.AbstractOperation
      org.quattor.pan.dml.operators.Variable
          org.quattor.pan.dml.operators.NestedVariable

All Implemented Interfaces:

Operation

Direct Known Subclasses:

SelfNestedVariable

public class NestedVariable
extends Variable

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.Variable

identifier, lookupOnly

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

ops, sourceRange

Constructor Summary

NestedVariable(SourceRange sourceRange, java.lang.String identifier, boolean lookupOnly, Operation... operations)

Method Summary

Element	execute(Context context) Execute this operation within the given context.
java.lang.String	toString() Default string representation of an operation is the class' simple name.

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

getInstance, getInstance, getInstance

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

calculateArgs, calculateTerms, checkInvalidSelfContext, checkRestrictedContext, getOperations, getSourceRange

Methods inherited from class java.lang.Object

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

Constructor Detail

NestedVariable

public NestedVariable(SourceRange sourceRange,
                      java.lang.String identifier,
                      boolean lookupOnly,
                      Operation... operations)

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

toString

public java.lang.String toString()

Description copied from class: AbstractOperation

Default string representation of an operation is the class' simple name.

Overrides:

toString in class AbstractOperation

Returns:

string of class' simple name