org.eclipse.viatra.query.runtime.localsearch.operations.extend

Class IterateOverEStructuralFeatureInstances

java.lang.Object

org.eclipse.viatra.query.runtime.localsearch.operations.extend.IterateOverEStructuralFeatureInstances

All Implemented Interfaces:

IIteratingSearchOperation, ISearchOperation

public class IterateOverEStructuralFeatureInstances
extends java.lang.Object
implements IIteratingSearchOperation

Iterates all available EStructuralFeature elements using an VIATRA Base indexer. It is assumed that the base indexer has been registered for the selected reference type.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Iterator<java.util.Map.Entry<org.eclipse.emf.ecore.EObject,java.lang.Object>>	it

Constructor Summary

Constructors

Constructor and Description
IterateOverEStructuralFeatureInstances(int sourcePosition, int targetPosition, org.eclipse.emf.ecore.EStructuralFeature feature)

Method Summary

Modifier and Type	Method and Description
boolean	execute(MatchingFrame frame, ISearchContext context)
org.eclipse.emf.ecore.EStructuralFeature	getFeature()
IInputKey	getIteratedInputKey() Get the IInputKey which instances this operation iterates upon.
java.util.List<java.lang.Integer>	getVariablePositions()
void	onBacktrack(MatchingFrame frame, ISearchContext context) After the execution of the operation failed and ISearchOperation.execute(MatchingFrame, ISearchContext) returns false, the onBacktrack callback is evaluated.
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.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

it

protected java.util.Iterator<java.util.Map.Entry<org.eclipse.emf.ecore.EObject,java.lang.Object>> it

Constructor Detail

IterateOverEStructuralFeatureInstances

public IterateOverEStructuralFeatureInstances(int sourcePosition,
                                              int targetPosition,
                                              org.eclipse.emf.ecore.EStructuralFeature feature)

Method Detail

getFeature

public org.eclipse.emf.ecore.EStructuralFeature getFeature()

onBacktrack

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

Description copied from interface: ISearchOperation

After the execution of the operation failed and ISearchOperation.execute(MatchingFrame, ISearchContext) returns false, the onBacktrack callback is evaluated. Operations may use this method to clean up any temporary structures, and make the operation ready for a new execution.

Specified by:

onBacktrack in interface ISearchOperation

Throws:

LocalSearchException

onInitialize

public void onInitialize(MatchingFrame frame,
                         ISearchContext context)

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.

Specified by:

onInitialize in interface ISearchOperation

execute

public boolean execute(MatchingFrame frame,
                       ISearchContext context)

Specified by:

execute in interface ISearchOperation

Returns:

true if successful, or false if backtracking needed

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getVariablePositions

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

Specified by:

getVariablePositions in interface ISearchOperation

Returns:

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

getIteratedInputKey

public IInputKey getIteratedInputKey()

Description copied from interface: IIteratingSearchOperation

Get the IInputKey which instances this operation iterates upon.

Specified by:

getIteratedInputKey in interface IIteratingSearchOperation

Since:

1.4