| /* |
| * Copyright (c) 2013, 2020 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // tware - initial implementation |
| package org.eclipse.persistence.internal.jpa.metamodel.proxy; |
| |
| import java.io.Serializable; |
| import java.lang.ref.WeakReference; |
| import java.lang.reflect.Member; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import jakarta.persistence.metamodel.Attribute; |
| import jakarta.persistence.metamodel.ManagedType; |
| |
| import org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl; |
| |
| /** |
| * A proxy class that allows EclipseLink to trigger the deployment of a persistence unit |
| * as an Attribute is accessed in the metamodel. |
| * @author tware |
| * |
| * @param <X> |
| * @param <T> |
| */ |
| public class AttributeProxyImpl<X, T> implements Attribute<X, T>, Serializable { |
| |
| protected Attribute<X, T> attribute = null; |
| protected transient Set<WeakReference<EntityManagerFactoryImpl>> factories = new HashSet<WeakReference<EntityManagerFactoryImpl>>(); |
| |
| public synchronized Attribute<X, T> getAttribute(){ |
| if (attribute == null){ |
| for (WeakReference<EntityManagerFactoryImpl> factoryRef: factories){ |
| EntityManagerFactoryImpl factory = factoryRef.get(); |
| if (factory != null){ |
| factory.getDatabaseSession(); |
| } else { |
| factories.remove(factoryRef); |
| } |
| } |
| } |
| return attribute; |
| } |
| |
| public synchronized Attribute<X, T> getAttributeInternal(){ |
| return attribute; |
| } |
| |
| public synchronized void setAttribute(Attribute<X, T> attribute){ |
| this.attribute = attribute; |
| } |
| |
| public synchronized void addFactory(EntityManagerFactoryImpl factory){ |
| for (WeakReference<EntityManagerFactoryImpl> factoryRef: factories){ |
| EntityManagerFactoryImpl fImpl = factoryRef.get(); |
| if (fImpl != null && fImpl.equals(factory)) { |
| return; |
| } |
| } |
| factories.add(new WeakReference<EntityManagerFactoryImpl>(factory)); |
| } |
| |
| @Override |
| public String getName() { |
| return getAttribute().getName(); |
| } |
| |
| @Override |
| public jakarta.persistence.metamodel.Attribute.PersistentAttributeType getPersistentAttributeType() { |
| return getAttribute().getPersistentAttributeType(); |
| } |
| |
| @Override |
| public ManagedType<X> getDeclaringType() { |
| return getAttribute().getDeclaringType(); |
| } |
| |
| @Override |
| public Class<T> getJavaType() { |
| return getAttribute().getJavaType(); |
| } |
| |
| @Override |
| public Member getJavaMember() { |
| return getAttribute().getJavaMember(); |
| } |
| |
| @Override |
| public boolean isAssociation() { |
| return getAttribute().isAssociation(); |
| } |
| |
| @Override |
| public boolean isCollection() { |
| return getAttribute().isCollection(); |
| } |
| |
| } |