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/*******************************************************************************
* Copyright (c) 2010, 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.refactoring;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.mapping.IResourceChangeDescriptionFactory;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.SubMonitor;
import org.eclipse.jpt.common.utility.internal.CollectionTools;
import org.eclipse.jpt.common.utility.internal.iterables.EmptyIterable;
import org.eclipse.jpt.jpa.core.JpaProject;
import org.eclipse.jpt.jpa.core.JpaProjectManager;
import org.eclipse.jpt.jpa.core.JptJpaCorePlugin;
import org.eclipse.jpt.jpa.core.context.persistence.Persistence;
import org.eclipse.jpt.jpa.core.context.persistence.PersistenceUnit;
import org.eclipse.jpt.jpa.core.context.persistence.PersistenceXml;
import org.eclipse.ltk.core.refactoring.Change;
import org.eclipse.ltk.core.refactoring.CompositeChange;
import org.eclipse.ltk.core.refactoring.RefactoringStatus;
import org.eclipse.ltk.core.refactoring.TextChange;
import org.eclipse.ltk.core.refactoring.TextFileChange;
import org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext;
import org.eclipse.ltk.core.refactoring.participants.RenameParticipant;
import org.eclipse.ltk.core.refactoring.participants.ResourceChangeChecker;
import org.eclipse.text.edits.MalformedTreeException;
import org.eclipse.text.edits.MultiTextEdit;
import org.eclipse.text.edits.ReplaceEdit;
import org.eclipse.text.edits.TextEdit;
/**
* Participant in the rename refactoring of {@link IFolders}s.
* If the renamed mapping file is listed in a persistence.xml file of any JpaProject
* then a Change object is created that will rename that reference from the file.
* If the renamed mapping file is an implied mapping file, then an actual reference to the mapping file will be specified.
*/
public class JpaRenameFolderParticipant
extends RenameParticipant
{
/**
* Store the {@link IFolder}s to be renamed
*/
protected IFolder originalFolder;
/**
* Store the persistence.xml ReplaceEdit in the checkConditions() call
* to avoid duplicated effort in createChange().
*/
protected final Map<IFile, Iterable<ReplaceEdit>> persistenceXmlReplaceEdits;
public JpaRenameFolderParticipant() {
super();
this.persistenceXmlReplaceEdits = new HashMap<IFile, Iterable<ReplaceEdit>>();
}
@Override
public String getName() {
return JpaCoreRefactoringMessages.JPA_RENAME_FOLDER_REFACTORING_PARTICIPANT_NAME;
}
@Override
protected boolean initialize(Object element) {
if (!getArguments().getUpdateReferences()) {
return false;
}
this.originalFolder = (IFolder) element;
return true;
}
//**************** RefactoringParticipant implementation *****************
/**
* Inform the refactoring processor of any files that are going to change. In the process of determining
* this go ahead and build up the appropriate ReplaceEdits to be used in the createChange()
*/
@Override
public RefactoringStatus checkConditions(IProgressMonitor monitor, CheckConditionsContext context) throws OperationCanceledException {
//since the progress bar will hang if a large JPA project is being loaded,
//we can at least set the subtask and report no progress. Only happens first time getJpaProjectManager() is called.
monitor.subTask(JpaCoreRefactoringMessages.JPA_REFACORING_PARTICIPANT_LOADING_JPA_PROJECTS_SUB_TASK_NAME);
JpaProjectManager jpaProjectManager = JptJpaCorePlugin.getJpaProjectManager();
if (jpaProjectManager.getJpaProjectsSize() == 0) {
return null;
}
SubMonitor sm = SubMonitor.convert(monitor, jpaProjectManager.getJpaProjectsSize()*10 + 1);
sm.subTask(JpaCoreRefactoringMessages.JPA_RENAME_FOLDER_REFACTORING_SUB_TASK_NAME);
ResourceChangeChecker checker = (ResourceChangeChecker) context.getChecker(ResourceChangeChecker.class);
IResourceChangeDescriptionFactory deltaFactory = checker.getDeltaFactory();
for (JpaProject jpaProject : JptJpaCorePlugin.getJpaProjectManager().getJpaProjects()) {
this.createReplaceEdits(jpaProject);
sm.worked(10);
}
if (sm.isCanceled()) {
throw new OperationCanceledException();
}
for (IFile persistenceXmlFile : this.persistenceXmlReplaceEdits.keySet()) {
deltaFactory.change(persistenceXmlFile);
}
sm.worked(1);
return null;
}
protected void createReplaceEdits(JpaProject jpaProject) throws OperationCanceledException {
PersistenceUnit persistenceUnit = getPersistenceUnit(jpaProject);
if (persistenceUnit == null) {
return;
}
Iterable<ReplaceEdit> replaceEdits = this.createPersistenceUnitReplaceEdits(persistenceUnit);
if (!CollectionTools.isEmpty(replaceEdits)) {
this.persistenceXmlReplaceEdits.put(jpaProject.getPersistenceXmlResource().getFile(), replaceEdits);
}
}
@Override
public Change createChange(IProgressMonitor monitor) throws CoreException, OperationCanceledException {
if (this.persistenceXmlReplaceEdits.isEmpty()) {
return null;
}
SubMonitor sm = SubMonitor.convert(monitor, this.persistenceXmlReplaceEdits.size());
sm.subTask(JpaCoreRefactoringMessages.JPA_RENAME_FOLDER_REFACTORING_SUB_TASK_NAME);
CompositeChange compositeChange = new CompositeChange(JpaCoreRefactoringMessages.JPA_RENAME_FOLDER_REFACTORING_CHANGE_NAME);
for (IFile persistenceXmlFile : this.persistenceXmlReplaceEdits.keySet()) {
if (sm.isCanceled()) {
throw new OperationCanceledException();
}
this.addPersistenceXmlRenameChange(persistenceXmlFile, compositeChange);
}
//must check for children in case all changes were made in other participants TextChanges,
//want to return null so our node does not appear in the preview tree
return compositeChange.getChildren().length == 0 ? null : compositeChange;
}
private Iterable<ReplaceEdit> createPersistenceUnitReplaceEdits(final PersistenceUnit persistenceUnit) {
if (persistenceUnit.getJpaProject().getJavaProject().isOnClasspath(this.originalFolder) || persistenceUnit.getJpaProject().getProject() == this.originalFolder.getProject()) {
return persistenceUnit.createRenameFolderEdits(this.originalFolder, getArguments().getNewName());
}
return EmptyIterable.instance();
}
protected void addPersistenceXmlRenameChange(IFile persistenceXmlFile, CompositeChange compositeChange) {
TextChange textChange = getTextChange(persistenceXmlFile);
if (textChange == null) {
textChange = new TextFileChange(JpaCoreRefactoringMessages.JPA_RENAME_FOLDER_REFACTORING_CHANGE_PERSISTENCE_XML_NAME, persistenceXmlFile);
MultiTextEdit multiTextEdit = new MultiTextEdit();
textChange.setEdit(multiTextEdit);
compositeChange.add(textChange);
}
Iterable<ReplaceEdit> mappingFileReplaceEdits = this.persistenceXmlReplaceEdits.get(persistenceXmlFile);
this.addEdits(textChange, mappingFileReplaceEdits);
}
private PersistenceUnit getPersistenceUnit(JpaProject jpaProject) {
PersistenceXml persistenceXml = jpaProject.getRootContextNode().getPersistenceXml();
if (persistenceXml == null) {
return null;
}
Persistence persistence = persistenceXml.getPersistence();
if (persistence == null) {
return null;
}
if (persistence.getPersistenceUnitsSize() != 1) {
return null; // the context model currently only supports 1 persistence unit
}
return persistence.getPersistenceUnits().iterator().next();
}
private void addEdits(TextChange textChange, Iterable<? extends TextEdit> textEdits) {
for (TextEdit textEdit : textEdits) {
try {
textChange.addEdit(textEdit);
}
catch (MalformedTreeException e) {
//log exception and don't add this persistence.xml type deletion to the conflicting change object
JptJpaCorePlugin.log(e);
}
}
}
}
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