import org.eclipse.emf.compare.match.IMatchEngine; //导入依赖的package包/类
/**
 * Initialize and configure the match engines to be used.
 *
 * @param packageIgnoreChecker
 *            The package ignore checker to use in the match engine.
 * @param diffingOptions
 *            The options configuring the comparison.
 *
 * @return The registry containing all prepared match engines
 */
private IMatchEngine.Factory.Registry initMatchEngine(PackageIgnoreChecker packageIgnoreChecker,
        Map<String, String> diffingOptions) {

    SimilarityChecker similarityChecker = initSimilarityChecker(diffingOptions);
    IEqualityHelper equalityHelper = initEqualityHelper(similarityChecker);
    EqualityStrategy equalityStrategy = new JaMoPPEqualityStrategy(similarityChecker);
    IgnoreStrategy ignoreStrategy = new JaMoPPIgnoreStrategy(packageIgnoreChecker);
    StrategyResourceMatcher resourceMatcher = initResourceMatcher(diffingOptions);

    IMatchEngine.Factory matchEngineFactory = new HierarchicalMatchEngineFactory(equalityHelper, equalityStrategy,
            ignoreStrategy, resourceMatcher);
    matchEngineFactory.setRanking(20);

    IMatchEngine.Factory.Registry matchEngineRegistry = new MatchEngineFactoryRegistryImpl();
    matchEngineRegistry.add(matchEngineFactory);

    return matchEngineRegistry;
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //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.IMatchEngine; //导入依赖的package包/类
private static double unidirectionalComparation(String first, String second, boolean semanticFlag) {
	IComparisonScope comparisonScope = buildComparisonScope(first, second);
	IMatchEngine.Factory.Registry registry = buildMatchEngineFactoryRegistry(semanticFlag);
	Comparison comparison = executeComparison(registry, comparisonScope);
	if(semanticFlag){
		printComparisonResults(comparison);
	}
	return evaluateComparisonResult(comparison);
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //导入依赖的package包/类
/**
 * Initialize the compare engine.
 *
 * @param packageIgnoreChecker
 *            The checker to decide if an element is within a package to ignore.
 * @param diffingOptions
 *            The options configuring the comparison.
 * @return The prepared emf compare engine.
 */
private EMFCompare initCompare(PackageIgnoreChecker packageIgnoreChecker, Map<String, String> diffingOptions) {

    IMatchEngine.Factory.Registry matchEngineRegistry = initMatchEngine(packageIgnoreChecker, diffingOptions);
    IPostProcessor.Descriptor.Registry<?> postProcessorRegistry = initPostProcessors(packageIgnoreChecker,
            diffingOptions);
    IDiffEngine diffEngine = initDiffEngine(packageIgnoreChecker);
    EMFCompare comparator = initComparator(matchEngineRegistry, postProcessorRegistry, diffEngine);
    return comparator;
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //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.IMatchEngine; //导入依赖的package包/类
public static IMatchEngine create() {
	return create(UseIdentifiers.WHEN_AVAILABLE,
			WeightProviderDescriptorRegistryImpl.createStandaloneInstance());
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //导入依赖的package包/类
private static IMatchEngine.Factory.Registry buildMatchEngineFactoryRegistry(boolean semanticFlag) {
	return semanticFlag ? SemanticMatchEngineFactoryRegistryImpl.createStandaloneInstance() : MatchEngineFactoryRegistryImpl.createStandaloneInstance();
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //导入依赖的package包/类
private static Comparison executeComparison(IMatchEngine.Factory.Registry registry, IComparisonScope scope) {
	return EMFCompare.builder().setMatchEngineFactoryRegistry(registry).build().compare(scope);
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //导入依赖的package包/类
public static IMatchEngine create(){
	return create(UseIdentifiers.WHEN_AVAILABLE, WeightProviderDescriptorRegistryImpl.createStandaloneInstance()); 
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //导入依赖的package包/类
/**
 * {@inheritDoc}
 */
public IMatchEngine getMatchEngine() {
	return SemanticMatchEngine.create(UseIdentifiers.NEVER, EMFCompareRCPPlugin.getDefault().getWeightProviderRegistry());
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //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.IMatchEngine; //导入依赖的package包/类
@Override
public IMatchEngine getMatchEngine() {
	return new HierarchicalMatchEngine(equalityHelper, equalityStrategy,
			ignoreStrategy, resourceMatcher);
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //导入依赖的package包/类
/**
 * Returns a registry filled with the default match engine factory provided
 * by EMF Compare {@link MatchEngineFactoryImpl} and the semantic match
 * engine {@link SemanticMatchEngineFactoryImpl}.
 * 
 * @return A registry filled with the default match engine factory provided
 *         by EMF Compare and the semantic match engine.
 */
public static IMatchEngine.Factory.Registry createStandaloneInstance() {
	final IMatchEngine.Factory.Registry registry = new SemanticMatchEngineFactoryRegistryImpl();
	final SemanticMatchEngineFactoryImpl semanticMatchEngineFactory = new SemanticMatchEngineFactoryImpl();
	semanticMatchEngineFactory.setRanking(20);
	registry.add(semanticMatchEngineFactory);
	return registry;
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //导入依赖的package包/类
/**
 * Returns a registry filled with the default match engine factory provided
 * by EMF Compare {@link MatchEngineFactoryImpl} and the semantic match
 * engine {@link CustomMatchEngineFactoryImpl}.
 * 
 * @return A registry filled with the default match engine factory provided
 *         by EMF Compare and the semantic match engine.
 */
public static IMatchEngine.Factory.Registry createStandaloneInstance() {
	final IMatchEngine.Factory.Registry registry = new SemanticMatchEngineFactoryRegistryImpl();
	final SemanticMatchEngineFactoryImpl semanticMatchEngineFactory = new SemanticMatchEngineFactoryImpl();
	semanticMatchEngineFactory.setRanking(20);
	registry.add(semanticMatchEngineFactory);
	return registry;
}
 

import org.eclipse.emf.compare.match.IMatchEngine; //导入依赖的package包/类
/**
 * Init the comparator instance to be used for comparison.
 *
 * @param matchEngineRegistry
 *            The registry containing the match engines to be used.
 * @param postProcessorRegistry
 *            Registry for post processors to be executed.
 * @param diffEngine
 *            The diff engine to run.
 * @return The prepared comparator instance.
 */
private EMFCompare initComparator(IMatchEngine.Factory.Registry matchEngineRegistry,
        IPostProcessor.Descriptor.Registry<?> postProcessorRegistry, IDiffEngine diffEngine) {
    EMFCompare.Builder builder = EMFCompare.builder();
    builder.setDiffEngine(diffEngine);
    builder.setMatchEngineFactoryRegistry(matchEngineRegistry);
    builder.setPostProcessorRegistry(postProcessorRegistry);
    EMFCompare comparator = builder.build();
    return comparator;
}