public static PluralAttribute.CollectionType determineCollectionType(Class javaType) {
	if ( java.util.List.class.isAssignableFrom( javaType ) ) {
		return PluralAttribute.CollectionType.LIST;
	}
	else if ( java.util.Set.class.isAssignableFrom( javaType ) ) {
		return PluralAttribute.CollectionType.SET;
	}
	else if ( java.util.Map.class.isAssignableFrom( javaType ) ) {
		return PluralAttribute.CollectionType.MAP;
	}
	else if ( java.util.Collection.class.isAssignableFrom( javaType ) ) {
		return PluralAttribute.CollectionType.COLLECTION;
	}
	else if ( javaType.isArray() ) {
		return PluralAttribute.CollectionType.LIST;
	}
	else {
		throw new IllegalArgumentException( "Expecting collection type [" + javaType.getName() + "]" );
	}
}
 

/**
	 * 判断是不是集合的实现类
	 * @param clazz
	 * @return
	 */
	public static boolean isCollection(Class<?> clazz) {
		return clazz.isAssignableFrom(List.class)||
				clazz.isAssignableFrom(Set.class)||
				clazz.isAssignableFrom(Collection.class);
//		String colleciton = "java.util.Collection";
//		Class<?>[] faces = clazz.getInterfaces();
//		for (Class<?> face : faces) {
//			if(face.getName().equals(colleciton)){
//				return true;
//			}else{
//				if(face.getSuperclass()!= Object.class&&face.getSuperclass()!=null){
//					return isCollection(face.getSuperclass());
//				}
//			}
//		}
//		if(clazz.getSuperclass()!= Object.class&&clazz.getSuperclass()!=null){
//			return isCollection(clazz.getSuperclass());
//		}
//		return false;
	}
 

@Override
public void addCollectionBinding(Collection collection) throws DuplicateMappingException {
	final String collectionRole = collection.getRole();
	if ( collectionBindingMap.containsKey( collectionRole ) ) {
		throw new DuplicateMappingException( DuplicateMappingException.Type.COLLECTION, collectionRole );
	}
	collectionBindingMap.put( collectionRole, collection );

	final AccessType accessType = AccessType.fromExternalName( collection.getCacheConcurrencyStrategy() );
	if ( accessType != null ) {
		locateCacheRegionConfigBuilder( collection.getCacheRegionName() ).addCollectionConfig(
				collection,
				accessType
		);
	}
}
 

/**
 * Creates the DependentValue object that forms a primary key reference for the collection.
 *
 * @param mappings
 * @param property          The grails property
 * @param collection        The collection object
 * @param persistentClasses
 * @return The DependantValue (key)
 */
protected DependantValue createPrimaryKeyValue(InFlightMetadataCollector mappings, PersistentProperty property,
                                               Collection collection, Map<?, ?> persistentClasses) {
    KeyValue keyValue;
    DependantValue key;
    String propertyRef = collection.getReferencedPropertyName();
    // this is to support mapping by a property
    if (propertyRef == null) {
        keyValue = collection.getOwner().getIdentifier();
    } else {
        keyValue = (KeyValue) collection.getOwner().getProperty(propertyRef).getValue();
    }

    if (LOG.isDebugEnabled())
        LOG.debug("[GrailsDomainBinder] creating dependant key value  to table [" + keyValue.getTable().getName() + "]");

    key = new DependantValue(metadataBuildingContext, collection.getCollectionTable(), keyValue);

    key.setTypeName(null);
    // make nullable and non-updateable
    key.setNullable(true);
    key.setUpdateable(false);
    return key;
}
 

public BasicCollectionPersister(Collection collection,
								CacheConcurrencyStrategy cache,
								Configuration cfg,
								SessionFactoryImplementor factory)
		throws MappingException, CacheException {
	super( collection, cache, cfg, factory );
}
 

/**
 * Links a bidirectional one-to-many, configuring the inverse side and using a column copy to perform the link
 *
 * @param collection      The collection one-to-many
 * @param associatedClass The associated class
 * @param key             The key
 * @param otherSide       The other side of the relationship
 */
protected void linkBidirectionalOneToMany(Collection collection, PersistentClass associatedClass, DependantValue key, PersistentProperty otherSide) {
    collection.setInverse(true);

    // Iterator mappedByColumns = associatedClass.getProperty(otherSide.getName()).getValue().getColumnIterator();
    Iterator<?> mappedByColumns = getProperty(associatedClass, otherSide.getName()).getValue().getColumnIterator();
    while (mappedByColumns.hasNext()) {
        Column column = (Column) mappedByColumns.next();
        linkValueUsingAColumnCopy(otherSide, column, key);
    }
}
 

public OneToManyPersister(Collection collection,
						  CacheConcurrencyStrategy cache,
						  Configuration cfg,
						  SessionFactoryImplementor factory)
		throws MappingException, CacheException {
	super( collection, cache, cfg, factory );
	cascadeDeleteEnabled = collection.getKey().isCascadeDeleteEnabled() &&
			factory.getDialect().supportsCascadeDelete();
	keyIsNullable = collection.getKey().isNullable();
	keyIsUpdateable = collection.getKey().isUpdateable();
}
 

private static void checkFilterConditions(Collection collValue) {
	//for now it can't happen, but sometime soon...
	if ( ( collValue.getFilters().size() != 0 || StringHelper.isNotEmpty( collValue.getWhere() ) ) &&
			collValue.getFetchMode() == FetchMode.JOIN &&
			!( collValue.getElement() instanceof SimpleValue ) && //SimpleValue (CollectionOfElements) are always SELECT but it does not matter
			collValue.getElement().getFetchMode() != FetchMode.JOIN ) {
		throw new MappingException(
				"@ManyToMany or @CollectionOfElements defining filter or where without join fetching "
						+ "not valid within collection using join fetching[" + collValue.getRole() + "]"
		);
	}
}
 

/**
 * Binds a root class (one with no super classes) to the runtime meta model
 * based on the supplied Grails domain class
 *
 * @param entity The Grails domain class
 * @param mappings    The Hibernate Mappings object
 * @param sessionFactoryBeanName  the session factory bean name
 */
public void bindRoot(HibernatePersistentEntity entity, InFlightMetadataCollector mappings, String sessionFactoryBeanName) {
    if (mappings.getEntityBinding(entity.getName()) != null) {
        LOG.info("[GrailsDomainBinder] Class [" + entity.getName() + "] is already mapped, skipping.. ");
        return;
    }

    RootClass root = new RootClass(this.metadataBuildingContext);
    root.setAbstract(entity.isAbstract());
    final MappingContext mappingContext = entity.getMappingContext();



    final java.util.Collection<PersistentEntity> children = mappingContext.getDirectChildEntities(entity);
    if (children.isEmpty()) {
        root.setPolymorphic(false);
    }
    bindClass(entity, root, mappings);

    Mapping m = getMapping(entity);

    bindRootPersistentClassCommonValues(entity, root, mappings, sessionFactoryBeanName);

    if (!children.isEmpty()) {
        boolean tablePerSubclass = m != null && !m.getTablePerHierarchy();
        if (!tablePerSubclass) {
            // if the root class has children create a discriminator property
            bindDiscriminatorProperty(root.getTable(), root, mappings);
        }
        // bind the sub classes
        bindSubClasses(entity, root, mappings, sessionFactoryBeanName);
    }

    addMultiTenantFilterIfNecessary(entity, root, mappings, sessionFactoryBeanName);

    mappings.addEntityBinding(root);
}
 

@SuppressWarnings("unchecked")
private void applyNamedEntityGraphs(java.util.Collection<NamedEntityGraphDefinition> namedEntityGraphs) {
	for ( NamedEntityGraphDefinition definition : namedEntityGraphs ) {
		log.debugf(
				"Applying named entity graph [name=%s, entity-name=%s, jpa-entity-name=%s",
				definition.getRegisteredName(),
				definition.getEntityName(),
				definition.getJpaEntityName()
		);
		final EntityType entityType = entity( definition.getEntityName() );
		if ( entityType == null ) {
			throw new IllegalArgumentException(
					"Attempted to register named entity graph [" + definition.getRegisteredName()
							+ "] for unknown entity ["+ definition.getEntityName() + "]"

			);
		}
		final EntityGraphImpl entityGraph = new EntityGraphImpl(
				definition.getRegisteredName(),
				entityType,
				this.getSessionFactory()
		);

		final NamedEntityGraph namedEntityGraph = definition.getAnnotation();

		if ( namedEntityGraph.includeAllAttributes() ) {
			for ( Object attributeObject : entityType.getAttributes() ) {
				entityGraph.addAttributeNodes( (Attribute) attributeObject );
			}
		}

		if ( namedEntityGraph.attributeNodes() != null ) {
			applyNamedAttributeNodes( namedEntityGraph.attributeNodes(), namedEntityGraph, entityGraph );
		}

		entityGraphMap.put( definition.getRegisteredName(), entityGraph );
	}
}
 

private void applyCacheSettings(Configuration configuration) {
	if ( settings.getCacheConcurrencyStrategy() != null ) {
		Iterator iter = configuration.getClassMappings();
		while ( iter.hasNext() ) {
			PersistentClass clazz = (PersistentClass) iter.next();
			Iterator props = clazz.getPropertyClosureIterator();
			boolean hasLob = false;
			while ( props.hasNext() ) {
				Property prop = (Property) props.next();
				if ( prop.getValue().isSimpleValue() ) {
					String type = ( ( SimpleValue ) prop.getValue() ).getTypeName();
					if ( "blob".equals(type) || "clob".equals(type) ) {
						hasLob = true;
					}
					if ( Blob.class.getName().equals(type) || Clob.class.getName().equals(type) ) {
						hasLob = true;
					}
				}
			}
			if ( !hasLob && !clazz.isInherited() && settings.overrideCacheStrategy() ) {
				configuration.setCacheConcurrencyStrategy( clazz.getEntityName(), settings.getCacheConcurrencyStrategy() );
			}
		}
		iter = configuration.getCollectionMappings();
		while ( iter.hasNext() ) {
			Collection coll = (Collection) iter.next();
			configuration.setCollectionCacheConcurrencyStrategy( coll.getRole(), settings.getCacheConcurrencyStrategy() );
		}
	}
}
 

private void validate() throws MappingException {
	Iterator iter = classes.values().iterator();
	while ( iter.hasNext() ) {
		( (PersistentClass) iter.next() ).validate( mapping );
	}
	iter = collections.values().iterator();
	while ( iter.hasNext() ) {
		( (Collection) iter.next() ).validate( mapping );
	}
}
 

@Override
@SuppressWarnings( {"unchecked"})
public CollectionPersister createCollectionPersister(
		Collection collectionBinding,
		CollectionDataAccess cacheAccessStrategy,
		PersisterCreationContext creationContext) throws HibernateException {
	// If the metadata for the collection specified an explicit persister class, use it
	Class<? extends CollectionPersister> persisterClass = collectionBinding.getCollectionPersisterClass();
	if ( persisterClass == null ) {
		// Otherwise, use the persister class indicated by the PersisterClassResolver service
		persisterClass = serviceRegistry.getService( PersisterClassResolver.class )
				.getCollectionPersisterClass( collectionBinding );
	}
	return createCollectionPersister( persisterClass, collectionBinding, cacheAccessStrategy, creationContext );
}
 

public void testComparator() {
	PersistentClass cm = cfg.getClassMapping("org.hibernate.test.legacy.Wicked");
	
	Property property = cm.getProperty("sortedEmployee");
	Collection col = (Collection) property.getValue();
	assertEquals(col.getComparatorClassName(),"org.hibernate.test.legacy.NonExistingComparator");
}
 

public CollectionDataCachingConfigImpl(
		Collection collectionDescriptor,
		AccessType accessType) {
	super( accessType );
	this.collectionDescriptor = collectionDescriptor;
	this.navigableRole = new NavigableRole( collectionDescriptor.getRole() );
}
 

@SuppressWarnings("UnusedReturnValue")
public Builder addCollectionConfig(Collection collectionDescriptor, AccessType accessType) {
	if ( collectionConfigs == null ) {
		collectionConfigs = new ArrayList<>();
	}

	collectionConfigs.add( new CollectionDataCachingConfigImpl( collectionDescriptor, accessType ) );
	return this;
}
 

public static CollectionPersister createCollectionPersister(Configuration cfg, Collection model, CacheConcurrencyStrategy cache, SessionFactoryImplementor factory)
throws HibernateException {
	Class persisterClass = model.getCollectionPersisterClass();
	if(persisterClass==null) { // default behavior
		return model.isOneToMany() ?
			(CollectionPersister) new OneToManyPersister(model, cache, cfg, factory) :
			(CollectionPersister) new BasicCollectionPersister(model, cache, cfg, factory);
	}
	else {
		return create(persisterClass, cfg, model, cache, factory);
	}

}
 

protected AbstractPluralAttributeSecondPass(
		MappingDocument mappingDocument,
		PluralAttributeSource pluralAttributeSource,
		Collection collectionBinding) {
	this.mappingDocument = mappingDocument;
	this.pluralAttributeSource = pluralAttributeSource;
	this.collectionBinding = collectionBinding;
}
 

@Override
public java.util.Collection<Table> collectTableMappings() {
	ArrayList<Table> tables = new ArrayList<>();
	for ( Namespace namespace : getDatabase().getNamespaces() ) {
		tables.addAll( namespace.getTables() );
	}
	return tables;
}
 

private void processCachingOverrides() {
	if ( bootstrapContext.getCacheRegionDefinitions() == null ) {
		return;
	}

	for ( CacheRegionDefinition cacheRegionDefinition : bootstrapContext.getCacheRegionDefinitions() ) {
		if ( cacheRegionDefinition.getRegionType() == CacheRegionDefinition.CacheRegionType.ENTITY ) {
			final PersistentClass entityBinding = getEntityBinding( cacheRegionDefinition.getRole() );
			if ( entityBinding == null ) {
				throw new HibernateException(
						"Cache override referenced an unknown entity : " + cacheRegionDefinition.getRole()
				);
			}
			if ( !RootClass.class.isInstance( entityBinding ) ) {
				throw new HibernateException(
						"Cache override referenced a non-root entity : " + cacheRegionDefinition.getRole()
				);
			}
			entityBinding.setCached( true );
			( (RootClass) entityBinding ).setCacheRegionName( cacheRegionDefinition.getRegion() );
			( (RootClass) entityBinding ).setCacheConcurrencyStrategy( cacheRegionDefinition.getUsage() );
			( (RootClass) entityBinding ).setLazyPropertiesCacheable( cacheRegionDefinition.isCacheLazy() );
		}
		else if ( cacheRegionDefinition.getRegionType() == CacheRegionDefinition.CacheRegionType.COLLECTION ) {
			final Collection collectionBinding = getCollectionBinding( cacheRegionDefinition.getRole() );
			if ( collectionBinding == null ) {
				throw new HibernateException(
						"Cache override referenced an unknown collection role : " + cacheRegionDefinition.getRole()
				);
			}
			collectionBinding.setCacheRegionName( cacheRegionDefinition.getRegion() );
			collectionBinding.setCacheConcurrencyStrategy( cacheRegionDefinition.getUsage() );
		}
	}
}
 

private void processExportableProducers() {
	// for now we only handle id generators as ExportableProducers

	final Dialect dialect = getDatabase().getJdbcEnvironment().getDialect();
	final String defaultCatalog = extractName( getDatabase().getDefaultNamespace().getName().getCatalog(), dialect );
	final String defaultSchema = extractName( getDatabase().getDefaultNamespace().getName().getSchema(), dialect );

	for ( PersistentClass entityBinding : entityBindingMap.values() ) {
		if ( entityBinding.isInherited() ) {
			continue;
		}

		handleIdentifierValueBinding(
				entityBinding.getIdentifier(),
				dialect,
				defaultCatalog,
				defaultSchema,
				(RootClass) entityBinding
		);
	}

	for ( Collection collection : collectionBindingMap.values() ) {
		if ( !IdentifierCollection.class.isInstance( collection ) ) {
			continue;
		}

		handleIdentifierValueBinding(
				( (IdentifierCollection) collection ).getIdentifier(),
				dialect,
				defaultCatalog,
				defaultSchema,
				null
		);
	}
}
 

@Override
public SessionFactoryBuilder getSessionFactoryBuilder() {
	final SessionFactoryBuilderImpl defaultBuilder = new SessionFactoryBuilderImpl( this, bootstrapContext );

	final ClassLoaderService cls = metadataBuildingOptions.getServiceRegistry().getService( ClassLoaderService.class );
	final java.util.Collection<SessionFactoryBuilderFactory> discoveredBuilderFactories = cls.loadJavaServices( SessionFactoryBuilderFactory.class );

	SessionFactoryBuilder builder = null;
	List<String> activeFactoryNames = null;

	for ( SessionFactoryBuilderFactory discoveredBuilderFactory : discoveredBuilderFactories ) {
		final SessionFactoryBuilder returnedBuilder = discoveredBuilderFactory.getSessionFactoryBuilder( this, defaultBuilder );
		if ( returnedBuilder != null ) {
			if ( activeFactoryNames == null ) {
				activeFactoryNames = new ArrayList<>();
			}
			activeFactoryNames.add( discoveredBuilderFactory.getClass().getName() );
			builder = returnedBuilder;
		}
	}

	if ( activeFactoryNames != null && activeFactoryNames.size() > 1 ) {
		throw new HibernateException(
				"Multiple active SessionFactoryBuilderFactory definitions were discovered : " +
						String.join(", ", activeFactoryNames)
		);
	}

	if ( builder != null ) {
		return builder;
	}

	return defaultBuilder;
}
 

@Override
public java.util.Collection<Table> collectTableMappings() {
	ArrayList<Table> tables = new ArrayList<>();
	for ( Namespace namespace : database.getNamespaces() ) {
		tables.addAll( namespace.getTables() );
	}
	return tables;
}
 

protected void bindCollectionForPropertyConfig(Collection collection, PropertyConfig config) {
    if (config == null) {
        collection.setLazy(true);
        collection.setExtraLazy(false);
    } else {
        final FetchMode fetch = config.getFetchMode();
        if(!fetch.equals(FetchMode.JOIN) && !fetch.equals(FetchMode.EAGER)) {
            collection.setLazy(true);
        }
        final Boolean lazy = config.getLazy();
        if(lazy != null) {
            collection.setExtraLazy(lazy);
        }
    }
}
 

/**
 * Binds the sub classes of a root class using table-per-heirarchy inheritance mapping
 *
 * @param domainClass The root domain class to bind
 * @param parent      The parent class instance
 * @param mappings    The mappings instance
 * @param sessionFactoryBeanName  the session factory bean name
 */
protected void bindSubClasses(HibernatePersistentEntity domainClass, PersistentClass parent,
                              InFlightMetadataCollector mappings, String sessionFactoryBeanName) {
    final java.util.Collection<PersistentEntity> subClasses = domainClass.getMappingContext().getDirectChildEntities(domainClass);

    for (PersistentEntity sub : subClasses) {
        final Class javaClass = sub.getJavaClass();
        if (javaClass.getSuperclass().equals(domainClass.getJavaClass()) && ConnectionSourcesSupport.usesConnectionSource(sub, dataSourceName)) {
            bindSubClass((HibernatePersistentEntity)sub, parent, mappings, sessionFactoryBeanName);
        }
    }
}
 

public CollectionSecondPass(Mappings mappings, Collection collection, java.util.Map inheritedMetas) {
	this.collection = collection;
	this.mappings = mappings;
	this.localInheritedMetas = inheritedMetas;
}
 

public Collection getCollectionBinding() {
	return collection;
}
 

public CollectionSecondPass(MetadataBuildingContext buildingContext, Collection collection, java.util.Map inheritedMetas) {
	this.collection = collection;
	this.buildingContext = buildingContext;
	this.localInheritedMetas = inheritedMetas;
}
 

public CollectionSecondPass(MetadataBuildingContext buildingContext, Collection collection) {
	this( buildingContext, collection, Collections.EMPTY_MAP );
}
 

public Collection getCollection() {
	return collection;
}