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/*******************************************************************************
* Copyright (c) 2006, 2011 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.core.internal.platform;
import static org.eclipse.jpt.common.core.internal.utility.XPointTools.*;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jpt.common.core.internal.utility.XPointTools.XPointException;
import org.eclipse.jpt.common.utility.internal.KeyedSet;
import org.eclipse.jpt.common.utility.internal.iterables.SuperIterableWrapper;
import org.eclipse.jpt.jpa.core.JpaFacet;
import org.eclipse.jpt.jpa.core.JpaPlatform;
import org.eclipse.jpt.jpa.core.JptJpaCorePlugin;
import org.eclipse.jpt.jpa.core.platform.JpaPlatformDescription;
import org.eclipse.jpt.jpa.core.platform.JpaPlatformGroupDescription;
import org.eclipse.jpt.jpa.core.platform.JpaPlatformManager;
import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;
/**
* Singleton registry for storing all the registered JPA platform configuration
* elements and instantiating JPA platforms from them.
*/
public class JpaPlatformManagerImpl
implements JpaPlatformManager {
static final String EXTENSION_POINT_ID = "jpaPlatforms"; //$NON-NLS-1$
static final String QUALIFIED_EXTENSION_POINT_ID = JptJpaCorePlugin.PLUGIN_ID_ + EXTENSION_POINT_ID;
static final String PLATFORM_GROUP_ELEMENT = "jpaPlatformGroup"; //$NON-NLS-1$
static final String PLATFORM_ELEMENT = "jpaPlatform"; //$NON-NLS-1$
static final String ID_ATTRIBUTE = "id"; //$NON-NLS-1$
static final String LABEL_ATTRIBUTE = "label"; //$NON-NLS-1$
static final String FACTORY_CLASS_ATTRIBUTE = "factoryClass"; //$NON-NLS-1$
static final String JPA_FACET_VERSION_ATTRIBUTE = "jpaFacetVersion"; //$NON-NLS-1$
static final String DEFAULT_ATTRIBUTE = "default"; //$NON-NLS-1$
static final String GROUP_ELEMENT = "group"; //$NON-NLS-1$
private static final JpaPlatformManagerImpl INSTANCE = new JpaPlatformManagerImpl();
public static JpaPlatformManagerImpl instance() {
return INSTANCE;
}
private KeyedSet<String, JpaPlatformGroupDescriptionImpl> jpaPlatformGroupDescriptions;
private KeyedSet<String, JpaPlatformDescriptionImpl> jpaPlatformDescriptions;
// ********** constructor/initialization **********
private JpaPlatformManagerImpl() {
super();
this.jpaPlatformGroupDescriptions = new KeyedSet<String, JpaPlatformGroupDescriptionImpl>();
this.jpaPlatformDescriptions = new KeyedSet<String, JpaPlatformDescriptionImpl>();
readExtensions();
}
private void readExtensions() {
final IExtensionRegistry registry = Platform.getExtensionRegistry();
final IExtensionPoint xpoint
= registry.getExtensionPoint(JptJpaCorePlugin.PLUGIN_ID, EXTENSION_POINT_ID);
if (xpoint == null) {
throw new IllegalStateException();
}
List<IConfigurationElement> platformGroupConfigs = new ArrayList<IConfigurationElement>();
List<IConfigurationElement> platformConfigs = new ArrayList<IConfigurationElement>();
for (IExtension extension : xpoint.getExtensions()) {
for (IConfigurationElement element : extension.getConfigurationElements()) {
if (element.getName().equals(PLATFORM_GROUP_ELEMENT)) {
platformGroupConfigs.add(element);
}
else if (element.getName().equals(PLATFORM_ELEMENT)) {
platformConfigs.add(element);
}
}
}
for (IConfigurationElement element : platformGroupConfigs) {
readPlatformGroupExtension(element);
}
for (IConfigurationElement element : platformConfigs) {
readPlatformExtension(element);
}
}
private void readPlatformGroupExtension(IConfigurationElement element) {
try {
final JpaPlatformGroupDescriptionImpl desc = new JpaPlatformGroupDescriptionImpl();
// plug-in id
desc.setPluginId(element.getContributor().getName());
// id
desc.setId(findRequiredAttribute(element, ID_ATTRIBUTE));
if (this.jpaPlatformGroupDescriptions.containsKey(desc.getId())) {
logDuplicateExtension(QUALIFIED_EXTENSION_POINT_ID, ID_ATTRIBUTE, desc.getId());
throw new XPointException();
}
// label
desc.setLabel(findRequiredAttribute(element, LABEL_ATTRIBUTE));
this.jpaPlatformGroupDescriptions.addItem(desc.getId(), desc);
}
catch (XPointException e) {
// Ignore and continue. The problem has already been reported to the user
// in the log.
}
}
private void readPlatformExtension(IConfigurationElement element) {
try {
final JpaPlatformDescriptionImpl desc = new JpaPlatformDescriptionImpl();
// plug-in id
desc.setPluginId(element.getContributor().getName());
// id
desc.setId(findRequiredAttribute(element, ID_ATTRIBUTE));
if (this.jpaPlatformDescriptions.containsKey(desc.getId())) {
logDuplicateExtension(QUALIFIED_EXTENSION_POINT_ID, ID_ATTRIBUTE, desc.getId());
throw new XPointException();
}
// label
desc.setLabel(findRequiredAttribute(element, LABEL_ATTRIBUTE));
// factory class
desc.setFactoryClassName(findRequiredAttribute(element, FACTORY_CLASS_ATTRIBUTE));
// JPA facet version
String jpaFacetVersionString = element.getAttribute(JPA_FACET_VERSION_ATTRIBUTE);
if (jpaFacetVersionString != null) {
IProjectFacetVersion jpaFacetVersion = JpaFacet.FACET.getVersion(jpaFacetVersionString);
if (jpaFacetVersion != null) {
desc.setJpaFacetVersion(jpaFacetVersion);
}
else {
logInvalidValue(element, JPA_FACET_VERSION_ATTRIBUTE, jpaFacetVersionString);
throw new XPointException();
}
}
// default
String defaultString = element.getAttribute(DEFAULT_ATTRIBUTE);
if (defaultString != null) {
if (defaultString.equals("true")) {
desc.setDefault(true);
}
else if (defaultString.equals("false")) {
desc.setDefault(false);
}
else {
logInvalidValue(element, DEFAULT_ATTRIBUTE, defaultString);
throw new XPointException();
}
}
// group
String groupId = element.getAttribute(GROUP_ELEMENT);
if (groupId != null) {
JpaPlatformGroupDescriptionImpl group = this.jpaPlatformGroupDescriptions.getItem(groupId);
if (group != null) {
desc.setGroup(group);
group.addPlatform(desc);
}
else {
logInvalidValue(element, GROUP_ELEMENT, groupId);
throw new XPointException();
}
}
this.jpaPlatformDescriptions.addItem(desc.getId(), desc);
}
catch (XPointException e) {
// Ignore and continue. The problem has already been reported to the user
// in the log.
}
}
// ********** public methods **********
public Iterable<JpaPlatformGroupDescription> getJpaPlatformGroups() {
return new SuperIterableWrapper<JpaPlatformGroupDescription>(this.jpaPlatformGroupDescriptions.getItemSet());
}
public JpaPlatformGroupDescription getJpaPlatformGroup(String groupId) {
return this.jpaPlatformGroupDescriptions.getItem(groupId);
}
public Iterable<JpaPlatformDescription> getJpaPlatforms() {
return new SuperIterableWrapper<JpaPlatformDescription>(this.jpaPlatformDescriptions.getItemSet());
}
public JpaPlatformDescription getJpaPlatform(String platformId) {
return this.jpaPlatformDescriptions.getItem(platformId);
}
public JpaPlatformDescription getDefaultJpaPlatform(IProjectFacetVersion jpaFacetVersion) {
for (JpaPlatformDescription platform : getJpaPlatforms()) {
if (platform.isDefault() && platform.supportsJpaFacetVersion(jpaFacetVersion)) {
return platform;
}
}
return null;
}
public JpaPlatform buildJpaPlatformImplementation(IProject project) {
String jpaPlatformId = JptJpaCorePlugin.getJpaPlatformId(project);
JpaPlatformDescriptionImpl platformDesc = this.jpaPlatformDescriptions.getItem(jpaPlatformId);
if (platformDesc == null) {
throw new IllegalArgumentException("Project does not have a recognized JPA platform.");
}
return platformDesc.buildJpaPlatform();
}
}
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