| /******************************************************************************* |
| * Copyright (c) 2012 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 |
| * which accompanies this distribution. |
| * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html |
| * and the Eclipse Distribution License is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| * |
| ******************************************************************************/ |
| package org.eclipse.jpt.jpa.eclipselink.core.jpql.spi; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.eclipse.jpt.jpa.core.jpql.spi.JpaManagedType; |
| import org.eclipse.jpt.jpa.core.jpql.spi.JpaManagedTypeProvider; |
| import org.eclipse.persistence.jpa.jpql.spi.IManagedType; |
| import org.eclipse.persistence.jpa.jpql.spi.IMapping; |
| import org.eclipse.persistence.jpa.jpql.spi.IType; |
| import org.eclipse.persistence.jpa.jpql.util.iterator.CloneIterator; |
| import org.eclipse.persistence.jpa.jpql.util.iterator.IterableIterator; |
| |
| /** |
| * The abstract implementation of a {@link IManagedType} that supports a dynamic managed type. |
| * |
| * Provisional API: This interface is part of an interim API that is still under development and |
| * expected to change significantly before reaching stability. It is available at this early stage |
| * to solicit feedback from pioneering adopters on the understanding that any code that uses this |
| * API will almost certainly be broken (repeatedly) as the API evolves. |
| * |
| * @version 3.2 |
| * @since 3.2 |
| * @author Pascal Filion |
| */ |
| public abstract class EclipseLinkDynamicManagedType implements IManagedType { |
| |
| /** |
| * The default implementation of {@link IManagedType}. |
| */ |
| private JpaManagedType delegate; |
| |
| /** |
| * The cached collection of {@link IMapping mappings} that prevent rebuilding them every time one |
| * is requested. |
| */ |
| private Map<String, EclipseLinkDynamicMapping> mappings; |
| |
| /** |
| * The provider of JPA managed types. |
| */ |
| private JpaManagedTypeProvider provider; |
| |
| /** |
| * The cached {@link IType} representing the managed type. |
| */ |
| private EclipseLinkDynamicType type; |
| |
| /** |
| * Creates a new <code>EclipseLinkDynamicManagedType</code>. |
| * |
| * @param provider The provider of JPA managed types |
| * @param delegate The default implementation of {@link IManagedType} |
| */ |
| public EclipseLinkDynamicManagedType(JpaManagedTypeProvider provider, |
| JpaManagedType delegate) { |
| |
| super(); |
| this.provider = provider; |
| this.delegate = delegate; |
| } |
| |
| /** |
| * Creates a {@link IType} that supports dynamic type, which means the type cannot be found in |
| * the project but is only in memory. |
| * |
| * @return A new {@link EclipseLinkDynamicType} |
| */ |
| protected EclipseLinkDynamicType buildDynamicType() { |
| return new EclipseLinkDynamicType( |
| delegate.getProvider().getTypeRepository(), |
| delegate.getManagedType().getPersistentType().getName() |
| ); |
| } |
| |
| /** |
| * Creates the external form that needs to wrap the given {@link AttributeMapping}. By default, |
| * the call is delegated to {@link IMappingBuilder}. |
| * |
| * @param mapping The mapping to wrap with a {@link IMapping} |
| * @return A new concrete instance of {@link IMapping} |
| */ |
| protected EclipseLinkDynamicMapping buildMapping(EclipseLinkMapping mapping) { |
| return new EclipseLinkDynamicMapping(this, mapping); |
| } |
| |
| /** |
| * Creates an external form for each {@link AttributeMapping} and stores them by using their |
| * mapping name. |
| * |
| * @return The mappings mapped by their name |
| */ |
| protected Map<String, EclipseLinkDynamicMapping> buildMappings() { |
| |
| Map<String, EclipseLinkDynamicMapping> mappings = new HashMap<String, EclipseLinkDynamicMapping>(); |
| |
| for (IMapping mapping : delegate.mappings()) { |
| mappings.put(mapping.getName(), buildMapping((EclipseLinkMapping) mapping)); |
| } |
| |
| return mappings; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int compareTo(IManagedType managedType) { |
| return delegate.compareTo(managedType); |
| } |
| |
| /** |
| * Returns the default implementation of {@link IManagedType} that is wrapped by this one. |
| * |
| * @return The actual {@link JpaManagedType} |
| */ |
| public JpaManagedType getDelegate() { |
| return delegate; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public IMapping getMappingNamed(String name) { |
| initializeMappings(); |
| return mappings.get(name); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public JpaManagedTypeProvider getProvider() { |
| return provider; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public IType getType() { |
| if (type == null) { |
| type = buildDynamicType(); |
| } |
| return type; |
| } |
| |
| /** |
| * Initializes this managed type. |
| */ |
| protected void initializeMappings() { |
| if (mappings == null) { |
| mappings = buildMappings(); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public IterableIterator<IMapping> mappings() { |
| initializeMappings(); |
| return new CloneIterator<IMapping>(mappings.values()); |
| } |
| } |