org.eclipse.incquery.runtime.localsearch.operations.extend

Class ExtendConstant

java.lang.Object

org.eclipse.incquery.runtime.localsearch.operations.extend.ExtendOperation<java.lang.Object>

org.eclipse.incquery.runtime.localsearch.operations.extend.ExtendConstant

All Implemented Interfaces:

ISearchOperation

public class ExtendConstant
extends ExtendOperation<java.lang.Object>

This operation handles constants in search plans by binding a variable to a constant value. Such operations should be executed as early as possible during plan execution.

Author:

Marton Bur

Constructor Summary

Constructors

Constructor and Description
ExtendConstant(int position, java.lang.Object value)

Method Summary

Modifier and Type	Method and Description
java.util.List<java.lang.Integer>	getVariablePositions()
void	onInitialize(MatchingFrame frame, ISearchContext context) During the execution of the corresponding plan, the onInitialize callback is evaluated before the execution of the operation may begin.

Methods inherited from class org.eclipse.incquery.runtime.localsearch.operations.extend.ExtendOperation

execute, onBacktrack

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExtendConstant

public ExtendConstant(int position,
                      java.lang.Object value)

Method Detail

onInitialize

public void onInitialize(MatchingFrame frame,
                         ISearchContext context)
                  throws LocalSearchException

Description copied from interface: ISearchOperation

During the execution of the corresponding plan, the onInitialize callback is evaluated before the execution of the operation may begin. Operations may use this method to initialize its internal data structures.

Throws:

LocalSearchException

getVariablePositions

public java.util.List<java.lang.Integer> getVariablePositions()

Returns:

the ordered list of the variable numbers that are affected by the search operation