org.quattor.pan.dml.functions

Class Key

java.lang.Object

org.quattor.pan.dml.AbstractOperation

org.quattor.pan.dml.functions.BuiltInFunction

org.quattor.pan.dml.functions.Key

All Implemented Interfaces:

Operation

public final class Key
extends BuiltInFunction

Returns the key associated with the entry given by the index. Note that dicts are ordered lexically by their keys.

Author:

loomis

Field Summary

Fields inherited from class org.quattor.pan.dml.functions.BuiltInFunction

name

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

ops, sourceRange

Method Summary

Methods

Modifier and Type	Method and Description
Element	execute(Context context) Execute this operation within the given context.
static Operation	getInstance(SourceRange sourceRange, Operation... operations)

Methods inherited from class org.quattor.pan.dml.functions.BuiltInFunction

throwExceptionIfCompileTimeContext, toString

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

Method Detail

getInstance

public static Operation getInstance(SourceRange sourceRange,
                    Operation... operations)
                             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