/* ******************************************************************************
* Copyright (c) 2006-2012 XMind Ltd. and others.
*
* This file is a part of XMind 3. XMind releases 3 and
* above are dual-licensed under the Eclipse Public License (EPL),
* which is available at http://www.eclipse.org/legal/epl-v10.html
* and the GNU Lesser General Public License (LGPL),
* which is available at http://www.gnu.org/licenses/lgpl.html
* See http://www.xmind.net/license.html for details.
*
* Contributors:
* XMind Ltd. - initial API and implementation
*******************************************************************************/
package org.xmind.core.internal.dom;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import org.xmind.core.IWorkbook;
import org.xmind.core.IWorkbookComponentRefManager;
import org.xmind.core.event.ICoreEventListener;
import org.xmind.core.event.ICoreEventRegistration;
import org.xmind.core.event.ICoreEventSource;
import org.xmind.core.event.ICoreEventSupport;
/**
*
* @author Frank Shaka
*/
public class WorkbookComponentRefCounter implements
IWorkbookComponentRefManager, ICoreEventSource {
private static final Collection<String> EMPTY = Collections.emptySet();
private WorkbookImpl workbook;
private Map<String, Collection<String>> source2targets;
private Map<String, Collection<String>> target2sources;
public WorkbookComponentRefCounter(WorkbookImpl workbook) {
this.workbook = workbook;
}
public IWorkbook getWorkbook() {
return workbook;
}
public void increaseRef(String source, String target) {
if (source2targets == null)
source2targets = new HashMap<String, Collection<String>>();
Collection<String> targets = source2targets.get(source);
if (targets == null) {
targets = new HashSet<String>();
source2targets.put(source, targets);
}
targets.add(target);
if (target2sources == null)
target2sources = new HashMap<String, Collection<String>>();
Collection<String> sources = target2sources.get(target);
if (sources == null) {
sources = new HashSet<String>();
target2sources.put(target, sources);
}
sources.add(target);
}
public void decreaseRef(String source, String target) {
if (source2targets != null) {
Collection<String> targets = source2targets.get(source);
if (targets != null) {
targets.remove(target);
if (targets.isEmpty())
source2targets.remove(source);
}
}
if (target2sources != null) {
Collection<String> sources = target2sources.get(target);
if (sources != null) {
sources.remove(source);
if (sources.isEmpty())
target2sources.remove(target);
}
}
}
public Collection<String> getSources() {
return source2targets == null ? EMPTY : source2targets.keySet();
}
public Collection<String> getSources(String target) {
if (target2sources != null) {
Collection<String> sources = target2sources.get(target);
if (sources != null)
return sources;
}
return EMPTY;
}
public Collection<String> getTargets() {
return target2sources == null ? EMPTY : target2sources.keySet();
}
public Collection<String> getTargets(String source) {
if (source2targets != null) {
Collection<String> targets = source2targets.get(source);
if (targets != null)
return targets;
}
return EMPTY;
}
// protected void postIncreaseRef(String resourceId, Object resource) {
// if (this.oldValue != null) {
// Collection<String> oldValue = this.oldValue;
// Collection<String> newValue = new ArrayList<String>(
// getCountedRefs());
// this.oldValue = null;
// fireValueChange(Core.ResourceRefs, oldValue, newValue);
// }
// }
//
// public void decreaseRef(String resourceId) {
// oldValue = new ArrayList<String>(getCountedRefs());
// super.decreaseRef(resourceId);
// }
//
// protected void postDecreaseRef(String resourceId, Object resource) {
// if (this.oldValue != null) {
// Collection<String> oldValue = this.oldValue;
// Collection<String> newValue = new ArrayList<String>(
// getCountedRefs());
// this.oldValue = null;
// fireValueChange(Core.ResourceRefs, oldValue, newValue);
// }
// }
public ICoreEventSupport getCoreEventSupport() {
return workbook.getCoreEventSupport();
}
public ICoreEventRegistration registerCoreEventListener(String type,
ICoreEventListener listener) {
return getCoreEventSupport().registerCoreEventListener(this, type,
listener);
}
// private void fireValueChange(String eventType, Object oldValue,
// Object newValue) {
// getCoreEventSupport().dispatchValueChange(this, eventType, oldValue,
// newValue);
// }
// public void loadTopicHyperlink() {
// List<ISheet> sheets = workbook.getSheets();
// for (ISheet sheet : sheets) {
// ITopic rootTopic = sheet.getRootTopic();
// loadTopic(rootTopic);
// }
// }
//
// private void loadTopic(ITopic topic) {
// String hyperlink = topic.getHyperlink();
// if (hyperlink != null && hyperlink.startsWith("xmind:#")) { //$NON-NLS-1$
// String targetId = hyperlink.substring(7);
// registryTopicLinks(targetId, topic.getId());
// }
// List<ITopic> children = topic.getAllChildren();
// if (children != null && !children.isEmpty()) {
// for (ITopic child : children)
// loadTopic(child);
// }
// }
//
//// public void modifyTargetLink(String oldTargetId, String newTargetId) {
//// List<String> list = registry.get(oldTargetId);
//// if (list == null || list.isEmpty())
//// return;
//// registry.put(newTargetId, list);
//// }
//
//// public void modifyTopicLinks(String oldTargetId, String newTargetId,
//// String sourceId) {
//// if (oldTargetId == null && newTargetId != null) { //add TopicHyprelink , or change WebHyperlink/FileHyperlink to TopicHyperlink
//// registryTopicLinks(newTargetId, sourceId);
//// } else if (oldTargetId != null && newTargetId == null) {//remove TopicHyperlink , or change TopicHyperlink to WebHyperlink/FileHyperlink
//// List<String> list = registry.get(oldTargetId);
//// if (list != null && !list.isEmpty())
//// list.remove(sourceId);
//// } else if (oldTargetId != null && newTargetId != null) {//modify TopicHyperlink (change TopicHyperlink to another TopicHyperlink)
//// List<String> list = registry.get(oldTargetId);
//// if (list != null && !list.isEmpty())
//// list.remove(sourceId);
//// registryTopicLinks(newTargetId, sourceId);
//// }
//// }
//
// public void registryTopicLinks(String targetId, String sourceId) {
// List<String> list = registry.get(targetId);
// if (list == null) {
// List<String> newList = new ArrayList<String>();
// newList.add(sourceId);
// registry.put(targetId, newList);
// } else
// list.add(sourceId);
// }
//
// public List<ITopic> getLinkTopics(String targetId) {
// List<String> list = registry.get(targetId);
// if (list != null && !list.isEmpty()) {
// return toTopics(list);
// }
// return null;
// }
//
//// public void removeTopicLinks(String targetId) {
//// registry.remove(targetId);
//// }
//
// public String getOldTargetId(ITopic topic) {
// String id = topic.getId();
// for (Entry<String, List<String>> entry : registry.entrySet()) {
// List<String> values = entry.getValue();
// for (String value : values) {
// if (id.equals(value))
// return entry.getKey();
// }
// }
// return null;
// }
//
// public void setNewTargetId(ITopic topic, String newTargetId) {
// String oldTargetId = getOldTargetId(topic);
// String sourceId = topic.getId();
// removeTopicLink(oldTargetId, sourceId);
// if (newTargetId != null)
// registryTopicLinks(newTargetId, sourceId);
// }
//
// private void removeTopicLink(String oldTargetId, String sourceId) {
// if (registry != null) {
// List<String> list = registry.get(oldTargetId);
// if (list != null && !list.isEmpty()) {
// list.remove(sourceId);
// }
// if (list == null || list.isEmpty())
// registry.remove(oldTargetId);
// }
// }
//
// private List<ITopic> toTopics(List<String> list) {
// List<ITopic> topics = new ArrayList<ITopic>();
// for (String id : list) {
// ITopic topic = getWorkbook().findTopic(id);
// topics.add(topic);
// }
// return topics;
// }
}
