/*******************************************************************************
* Copyright (c) 2012 Wind River Systems, Inc. and others. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.ui.views.internal.categories;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.tcf.te.runtime.events.ChangeEvent;
import org.eclipse.tcf.te.runtime.events.EventManager;
import org.eclipse.tcf.te.runtime.persistence.interfaces.IURIPersistenceService;
import org.eclipse.tcf.te.runtime.services.ServiceManager;
import org.eclipse.tcf.te.ui.views.activator.UIPlugin;
import org.eclipse.tcf.te.ui.views.extensions.CategoriesExtensionPointManager;
import org.eclipse.tcf.te.ui.views.interfaces.categories.ICategoryManager;
/**
* Category manager implementation.
*/
public class CategoryManager implements ICategoryManager {
// The map maintaining the id list per category id
private Map<String, List<String>> cat2id = new HashMap<String, List<String>>();
// The map maintaining the category id list per id
private Map<String, List<String>> id2cat = new HashMap<String, List<String>>();
// The map maintaining the transient id list per category id
private final Map<String, List<String>> _t_cat2id = new HashMap<String, List<String>>();
// The map maintaining the transient category id list per id
private final Map<String, List<String>> _t_id2cat = new HashMap<String, List<String>>();
/**
* Constructor.
*/
public CategoryManager() {
super();
initialize();
}
/**
* Returns the root path where to persist the maps between the sessions.
*
* @return The root path or <code>null</code>.
*/
private IPath getRoot() {
try {
File file = UIPlugin.getDefault().getStateLocation().toFile();
boolean exists = file.exists();
if (!exists) {
exists = file.mkdirs();
}
if (exists && file.canRead() && file.isDirectory()) {
return new Path(file.toString());
}
} catch (IllegalStateException e) {
/* ignored on purpose */
}
File file = new Path(System.getProperty("user.home")).append(".tcf").toFile(); //$NON-NLS-1$ //$NON-NLS-2$
if (file.canRead() && file.isDirectory()) {
return new Path(file.toString());
}
return null;
}
/**
* Initialize the category manager.
*/
private void initialize() {
IPath root = getRoot();
if (root == null) {
return;
}
// Clear out the transient maps
_t_cat2id.clear();
_t_id2cat.clear();
cat2id.clear();
id2cat.clear();
try {
// Get the persistence service
IURIPersistenceService uRIPersistenceService = ServiceManager.getInstance().getService(IURIPersistenceService.class);
if (uRIPersistenceService == null) {
throw new IOException("Persistence service instance unavailable."); //$NON-NLS-1$
}
// Save the history to the persistence storage
cat2id = (Map<String,List<String>>)uRIPersistenceService.read(cat2id, root.append("cat2id.json").toFile().toURI()); //$NON-NLS-1$
} catch (IOException e) {
}
try {
// Get the persistence service
IURIPersistenceService uRIPersistenceService = ServiceManager.getInstance().getService(IURIPersistenceService.class);
if (uRIPersistenceService == null) {
throw new IOException("Persistence service instance unavailable."); //$NON-NLS-1$
}
// Save the history to the persistence storage
id2cat = (Map<String,List<String>>)uRIPersistenceService.read(id2cat, root.append("id2cat.json").toFile().toURI()); //$NON-NLS-1$
} catch (IOException e) {
}
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.views.categories.ICategoryManager#flush()
*/
@Override
public void flush() {
IPath root = getRoot();
if (root == null) {
return;
}
try {
// Get the persistence service
IURIPersistenceService uRIPersistenceService = ServiceManager.getInstance().getService(IURIPersistenceService.class);
if (uRIPersistenceService == null) {
throw new IOException("Persistence service instance unavailable."); //$NON-NLS-1$
}
// Save the history to the persistence storage
uRIPersistenceService.write(cat2id, root.append("cat2id.json").toFile().toURI()); //$NON-NLS-1$
} catch (IOException e) {
}
try {
// Get the persistence service
IURIPersistenceService uRIPersistenceService = ServiceManager.getInstance().getService(IURIPersistenceService.class);
if (uRIPersistenceService == null) {
throw new IOException("Persistence service instance unavailable."); //$NON-NLS-1$
}
// Save the history to the persistence storage
uRIPersistenceService.write(id2cat, root.append("id2cat.json").toFile().toURI()); //$NON-NLS-1$
} catch (IOException e) {
}
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.views.categories.ICategoryManager#add(java.lang.String, java.lang.String)
*/
@Override
public boolean add(String categoryId, String id) {
Assert.isNotNull(categoryId);
Assert.isNotNull(id);
boolean added = false;
List<String> ids = cat2id.get(categoryId);
if (ids == null) {
ids = new ArrayList<String>();
cat2id.put(categoryId, ids);
}
if (!ids.contains(id)) {
added |= ids.add(id);
}
List<String> cats = id2cat.get(id);
if (cats == null) {
cats = new ArrayList<String>();
id2cat.put(id, cats);
}
if (!cats.contains(categoryId)) {
added |= cats.add(categoryId);
}
if (added) {
flush();
EventManager.getInstance().fireEvent(
new ChangeEvent(CategoriesExtensionPointManager.getInstance().getCategory(categoryId, false), ChangeEvent.ID_ADDED, null, id));
}
return added;
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.views.interfaces.categories.ICategoryManager#addTransient(java.lang.String, java.lang.String)
*/
@Override
public boolean addTransient(String categoryId, String id) {
Assert.isNotNull(categoryId);
Assert.isNotNull(id);
boolean added = false;
List<String> ids = _t_cat2id.get(categoryId);
if (ids == null) {
ids = new ArrayList<String>();
_t_cat2id.put(categoryId, ids);
}
if (!ids.contains(id)) {
added |= ids.add(id);
}
List<String> cats = _t_id2cat.get(id);
if (cats == null) {
cats = new ArrayList<String>();
_t_id2cat.put(id, cats);
}
if (!cats.contains(categoryId)) {
added |= cats.add(categoryId);
}
if (added) {
EventManager.getInstance().fireEvent(
new ChangeEvent(CategoriesExtensionPointManager.getInstance().getCategory(categoryId, false), ChangeEvent.ID_ADDED, null, id));
}
return added;
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.views.categories.ICategoryManager#remove(java.lang.String, java.lang.String)
*/
@Override
public boolean remove(String categoryId, String id) {
Assert.isNotNull(categoryId);
Assert.isNotNull(id);
boolean removed = false;
List<String> ids = cat2id.get(categoryId);
if (ids != null) {
removed |= ids.remove(id);
if (ids.isEmpty()) {
cat2id.remove(categoryId);
}
}
ids = _t_cat2id.get(categoryId);
if (ids != null) {
removed |= ids.remove(id);
if (ids.isEmpty()) {
_t_cat2id.remove(categoryId);
}
}
List<String> cats = id2cat.get(id);
if (cats != null) {
removed |= cats.remove(categoryId);
if (cats.isEmpty()) {
id2cat.remove(id);
}
}
cats = _t_id2cat.get(id);
if (cats != null) {
removed |= cats.remove(categoryId);
if (cats.isEmpty()) {
_t_id2cat.remove(id);
}
}
if (removed) {
flush();
EventManager.getInstance().fireEvent(
new ChangeEvent(CategoriesExtensionPointManager.getInstance().getCategory(categoryId, false), ChangeEvent.ID_REMOVED, id, null));
}
return removed;
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.views.categories.ICategoryManager#belongsTo(java.lang.String, java.lang.String)
*/
@Override
public boolean belongsTo(String categoryId, String id) {
Assert.isNotNull(categoryId);
Assert.isNotNull(id);
boolean belongsTo = false;
List<String> ids = cat2id.get(categoryId);
if (ids != null && ids.contains(id)) {
belongsTo = true;
} else {
ids = _t_cat2id.get(categoryId);
if (ids != null && ids.contains(id)) {
belongsTo = true;
}
}
return belongsTo;
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.views.categories.ICategoryManager#getCategoryIds(java.lang.String)
*/
@Override
public String[] getCategoryIds(String id) {
Assert.isNotNull(id);
List<String> allCategories = new ArrayList<String>();
List<String> cats = id2cat.get(id);
if (cats != null) {
allCategories.addAll(cats);
}
cats = _t_id2cat.get(id);
if (cats != null) {
for (String cat : cats) {
if (!allCategories.contains(cat)) {
allCategories.add(cat);
}
}
}
return allCategories.toArray(new String[allCategories.size()]);
}
}
