| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| * |
| */ |
| package org.apache.polygene.runtime.association; |
| |
| import java.lang.reflect.Type; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.function.BiFunction; |
| import java.util.function.Function; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| import java.util.stream.StreamSupport; |
| import org.apache.polygene.api.association.AssociationDescriptor; |
| import org.apache.polygene.api.association.NamedAssociation; |
| import org.apache.polygene.api.association.NamedAssociationWrapper; |
| import org.apache.polygene.api.entity.EntityReference; |
| import org.apache.polygene.api.identity.HasIdentity; |
| import org.apache.polygene.spi.entity.NamedAssociationState; |
| |
| public class NamedAssociationInstance<T> extends AbstractAssociationInstance<T> |
| implements NamedAssociation<T> |
| { |
| private final NamedAssociationState namedAssociationState; |
| |
| public NamedAssociationInstance( AssociationInfo associationInfo, |
| BiFunction<EntityReference, Type, Object> associationFunction, |
| NamedAssociationState namedAssociationState |
| ) |
| { |
| super( associationInfo, associationFunction ); |
| this.namedAssociationState = namedAssociationState; |
| } |
| |
| @Override |
| public Iterator<String> iterator() |
| { |
| return namedAssociationState.iterator(); |
| } |
| |
| @Override |
| public int count() |
| { |
| return namedAssociationState.count(); |
| } |
| |
| @Override |
| public boolean containsName( String name ) |
| { |
| return namedAssociationState.containsName( name ); |
| } |
| |
| @Override |
| public boolean put( String name, T entity ) |
| { |
| Objects.requireNonNull( entity, "entity" ); |
| checkImmutable(); |
| try |
| { |
| checkType( entity ); |
| } |
| catch( IllegalArgumentException e ) |
| { |
| throw new IllegalArgumentException( "Named association [" + name +"] must have Identity: " + entity ); |
| } |
| associationInfo.checkConstraints( entity ); |
| return namedAssociationState.put( name, EntityReference.create( ( (HasIdentity) entity ).identity().get() ) ); |
| } |
| |
| @Override |
| public boolean remove( String name ) |
| { |
| checkImmutable(); |
| return namedAssociationState.remove( name ); |
| } |
| |
| @Override |
| public boolean clear() |
| { |
| checkImmutable(); |
| return namedAssociationState.clear(); |
| } |
| |
| @Override |
| public T get( String name ) |
| { |
| return getEntity( namedAssociationState.get( name ) ); |
| } |
| |
| @Override |
| public String nameOf( T entity ) |
| { |
| return namedAssociationState.nameOf( getEntityReference( entity ) ); |
| } |
| |
| @Override |
| public Map<String, T> toMap() |
| { |
| Map<String, T> map = new HashMap<>(); |
| for( String name : namedAssociationState ) |
| { |
| map.put( name, getEntity( namedAssociationState.get( name ) ) ); |
| } |
| return map; |
| } |
| |
| @Override |
| public Stream<Map.Entry<String, EntityReference>> references() |
| { |
| return namedAssociationState.stream(); |
| } |
| |
| @Override |
| public EntityReference referenceOf( String name ) |
| { |
| return namedAssociationState.get( name ); |
| } |
| |
| public Iterable<Map.Entry<String, EntityReference>> getEntityReferences() |
| { |
| return Collections.unmodifiableMap( |
| StreamSupport.stream( namedAssociationState.spliterator(), false ) |
| .collect( Collectors.toMap( Function.identity(), namedAssociationState::get ) ) |
| ).entrySet(); |
| } |
| |
| @Override |
| public boolean equals( Object o ) |
| { |
| if( this == o ) |
| { |
| return true; |
| } |
| if( o == null || getClass() != o.getClass() ) |
| { |
| return false; |
| } |
| NamedAssociation<?> that = (NamedAssociation) o; |
| // Unwrap if needed |
| while( that instanceof NamedAssociationWrapper ) |
| { |
| that = ( (NamedAssociationWrapper) that ).next(); |
| } |
| // Descriptor equality |
| NamedAssociationInstance<?> thatInstance = (NamedAssociationInstance) that; |
| AssociationDescriptor thatDescriptor = (AssociationDescriptor) thatInstance.associationInfo(); |
| if( !associationInfo.equals( thatDescriptor ) ) |
| { |
| return false; |
| } |
| // State equality |
| if( namedAssociationState.count() != thatInstance.namedAssociationState.count() ) |
| { |
| return false; |
| } |
| for( String name : namedAssociationState ) |
| { |
| if( !thatInstance.namedAssociationState.containsName( name ) ) |
| { |
| return false; |
| } |
| EntityReference thisReference = namedAssociationState.get( name ); |
| EntityReference thatReference = thatInstance.namedAssociationState.get( name ); |
| if( !thisReference.equals( thatReference ) ) |
| { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| int hash = associationInfo.hashCode() * 31; // Descriptor |
| for( String name : namedAssociationState ) |
| { |
| hash += name.hashCode(); |
| hash += namedAssociationState.get( name ).hashCode() * 7; // State |
| } |
| return hash; |
| } |
| } |