| /******************************************************************************* |
| * Copyright (c) 2007, 2009 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v1.0, which accompanies this distribution |
| * and is available at http://www.eclipse.org/legal/epl-v10.html. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.jpa.ui.internal; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.ListIterator; |
| import org.eclipse.jpt.common.utility.internal.iterators.ArrayListIterator; |
| import org.eclipse.jpt.jpa.ui.JpaPlatformUiProvider; |
| import org.eclipse.jpt.jpa.ui.ResourceUiDefinition; |
| import org.eclipse.jpt.jpa.ui.details.JpaDetailsProvider; |
| |
| /** |
| * All the state in the JPA platform ui provider should be "static" (i.e. unchanging once |
| * it is initialized). |
| */ |
| public abstract class AbstractJpaPlatformUiProvider implements JpaPlatformUiProvider |
| { |
| private JpaDetailsProvider[] detailsProviders; |
| |
| private ResourceUiDefinition[] resourceUiDefinitions; |
| |
| /** |
| * zero-argument constructor |
| */ |
| public AbstractJpaPlatformUiProvider() { |
| super(); |
| } |
| |
| |
| // ********** details providers ********** |
| |
| public ListIterator<JpaDetailsProvider> detailsProviders() { |
| return new ArrayListIterator<JpaDetailsProvider>(getDetailsProviders()); |
| } |
| |
| protected synchronized JpaDetailsProvider[] getDetailsProviders() { |
| if (this.detailsProviders == null) { |
| this.detailsProviders = this.buildDetailsProviders(); |
| } |
| return this.detailsProviders; |
| } |
| |
| protected JpaDetailsProvider[] buildDetailsProviders() { |
| ArrayList<JpaDetailsProvider> providers = new ArrayList<JpaDetailsProvider>(); |
| this.addDetailsProvidersTo(providers); |
| return providers.toArray(new JpaDetailsProvider[providers.size()]); |
| } |
| |
| /** |
| * Implement this to specify JPA details providers. |
| */ |
| protected abstract void addDetailsProvidersTo(List<JpaDetailsProvider> providers); |
| |
| |
| |
| // ********** structure providers ********** |
| |
| public ListIterator<ResourceUiDefinition> resourceUiDefinitions() { |
| return new ArrayListIterator<ResourceUiDefinition>(getResourceUiDefinitions()); |
| } |
| |
| protected synchronized ResourceUiDefinition[] getResourceUiDefinitions() { |
| if (this.resourceUiDefinitions == null) { |
| this.resourceUiDefinitions = this.buildResourceUiDefinitions(); |
| } |
| return this.resourceUiDefinitions; |
| } |
| |
| protected ResourceUiDefinition[] buildResourceUiDefinitions() { |
| ArrayList<ResourceUiDefinition> definitions = new ArrayList<ResourceUiDefinition>(); |
| this.addResourceUiDefinitionsTo(definitions); |
| return definitions.toArray(new ResourceUiDefinition[definitions.size()]); |
| } |
| |
| /** |
| * Implement this to specify JPA mapping file ui definitions. |
| */ |
| protected abstract void addResourceUiDefinitionsTo(List<ResourceUiDefinition> definitions); |
| |
| } |