import org.eclipse.emf.compare.match.DefaultMatchEngine; //导入依赖的package包/类
/**
 * setups a default emf comparator. This is just copy & paste from the
 * EMFCompare tutorial.
 * 
 * @return default emf comparator.
 */
private EMFCompare setupComparator() {
	IEObjectMatcher matcher = DefaultMatchEngine
			.createDefaultEObjectMatcher(UseIdentifiers.NEVER);
	IComparisonFactory comparisonFactory = new DefaultComparisonFactory(
			new DefaultEqualityHelperFactory());
	IMatchEngine.Factory matchEngineFactory = new MatchEngineFactoryImpl(
			matcher, comparisonFactory);
	matchEngineFactory.setRanking(20);
	IMatchEngine.Factory.Registry matchEngineRegistry = new MatchEngineFactoryRegistryImpl();
	matchEngineRegistry.add(matchEngineFactory);
	EMFCompare comparator = EMFCompare.builder()
			.setMatchEngineFactoryRegistry(matchEngineRegistry).build();

	return comparator;
}
 

import org.eclipse.emf.compare.match.DefaultMatchEngine; //导入依赖的package包/类
/**
 * Initialize a cache to be used by the equality helper.
 *
 * @return The ready to use cache.
 */
private LoadingCache<EObject, URI> initEqualityCache() {
    CacheBuilder<Object, Object> cacheBuilder = CacheBuilder.newBuilder().maximumSize(
            DefaultMatchEngine.DEFAULT_EOBJECT_URI_CACHE_MAX_SIZE);
    final LoadingCache<EObject, URI> cache = EqualityHelper.createDefaultCache(cacheBuilder);
    return cache;
}
 

import org.eclipse.emf.compare.match.DefaultMatchEngine; //导入依赖的package包/类
@Override
public IMatchEngine getMatchEngine() {
	final IComparisonFactory comparisonFactory = new DefaultComparisonFactory(new DefaultEqualityHelperFactory());
	final IEObjectMatcher matcher = DefaultMatchEngine.createDefaultEObjectMatcher(UseIdentifiers.WHEN_AVAILABLE);
	return new SCTMatchEngine(matcher, comparisonFactory);
}
 

import org.eclipse.emf.compare.match.DefaultMatchEngine; //导入依赖的package包/类
public static EObject merge(URI localChanges, URI original, URI remote) throws IncQueryException {
	Resource originalModel = new ResourceSetImpl().getResource(original, true);
	Resource remoteModel = new ResourceSetImpl().getResource(remote, true);
	
	
	// Configure EMF Compare
	IEObjectMatcher matcher = DefaultMatchEngine.createDefaultEObjectMatcher(UseIdentifiers.WHEN_AVAILABLE);
	IComparisonFactory comparisonFactory = new DefaultComparisonFactory(new DefaultEqualityHelperFactory());
	IMatchEngine.Factory matchEngineFactory = new MatchEngineFactoryImpl(matcher, comparisonFactory);
	matchEngineFactory.setRanking(20);
	IMatchEngine.Factory.Registry matchEngineRegistry = new MatchEngineFactoryRegistryImpl();
	matchEngineRegistry.add(matchEngineFactory);
	EMFCompare comparator = EMFCompare.builder().setMatchEngineFactoryRegistry(matchEngineRegistry).build();

	// Compare the two models
	IComparisonScope scopeOR = EMFCompare.createDefaultScope(remoteModel, originalModel);
	Comparison comparisonOR = comparator.compare(scopeOR);

	ChangeSet changeSetOR = EMFCompareTranslator.translate(comparisonOR);
	ChangeSet changeSetOL = null;
	boolean hasLocalChanges = new File(localChanges.toFileString()).exists(); 
	if(hasLocalChanges) {
		changeSetOL = (ChangeSet) new ResourceSetImpl().getResource(localChanges, true).getContents().get(0);
		EList<Change> changes = changeSetOL.getChanges();
		for (Change change : changes) {
			change.setExecutable(true);
		}
	} else {
		changeSetOL = ModelFactory.eINSTANCE.createChangeSet();
	}
	
	Collection<DSETransformationRule<?,?>>rules = Lists.<DSETransformationRule<?,?>>newArrayList(
	new DSETransformationRule<CreateMatch,CreateMatcher>(CreateQuerySpecification.instance(), new CreateOperation()),
	new DSETransformationRule<DeleteMatch,DeleteMatcher>(DeleteQuerySpecification.instance(), new DeleteOperation()),
	new DSETransformationRule<SetReferenceMatch,SetReferenceMatcher>(SetReferenceQuerySpecification.instance(), new SetReferenceOperation()),
	new DSETransformationRule<AddReferenceMatch,AddReferenceMatcher>(AddReferenceQuerySpecification.instance(), new AddReferenceOperation()),
	new DSETransformationRule<RemoveReferenceMatch,RemoveReferenceMatcher>(RemoveReferenceQuerySpecification.instance(), new RemoveReferenceOperation()),
	new DSETransformationRule<SetAttributeMatch,SetAttributeMatcher>(SetAttributeQuerySpecification.instance(), new SetAttributeOperation()),
	new DSETransformationRule<AddAttributeMatch,AddAttributeMatcher>(AddAttributeQuerySpecification.instance(), new AddAttributeOperation()),
	new DSETransformationRule<RemoveAttributeMatch,RemoveAttributeMatcher>(RemoveAttributeQuerySpecification.instance(), new RemoveAttributeOperation()));

	Collection<IQuerySpecification<?>>goals = Lists.<IQuerySpecification<?>>newArrayList(
			GoalPatternQuerySpecification.instance()
	);		

	
	DSEMergeManager manager = DSEMergeManager.create(originalModel.getContents().get(0), changeSetOL, changeSetOR);
	manager.setMetamodel(WTSpec4MPackage.eINSTANCE);
	manager.setId2EObject(Id2objectQuerySpecification.instance());
	manager.setRules(rules);
	manager.setObjectives(goals);

	Collection<Solution> solutions = manager.start();
	EObject merged = solutions.iterator().next().getScope().getOrigin();
	return merged;		
}
 

import org.eclipse.emf.compare.match.DefaultMatchEngine; //导入依赖的package包/类
/**
 * Constructor that instantiate a {@link LazyMatchEngine} that will use
 * identifiers as specified by the given {@code useIDs} enumeration.
 * 
 * @param useIDs
 *            the kinds of matcher to use.
 * @param registry
 *            A match engine needs a WeightProvider in case of this match
 *            engine do not use identifiers.
 */
public LazyMatchEngineFactory(UseIdentifiers useIDs, WeightProvider.Descriptor.Registry registry) {
    final IComparisonFactory comparisonFactory = new DefaultComparisonFactory(
            new LazyEqualityHelperFactory());
    final IEObjectMatcher matcher = DefaultMatchEngine.createDefaultEObjectMatcher(useIDs,
            registry);
    NeoLogger.info("LazyMatchEngine with LazyEqualityHelper created");
    matchEngine = new LazyMatchEngine(matcher, comparisonFactory);
}