/*******************************************************************************
* Copyright (c) 2015, 2015 IBM Corporation 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:
* Bruno Medeiros - initial API and implementation
*******************************************************************************/
package melnorme.lang.ide.core.project_model;
import static melnorme.utilbox.core.Assert.AssertNamespace.assertNotNull;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.core.resources.IProject;
import melnorme.utilbox.fields.ListenerListHelper;
import melnorme.utilbox.misc.SimpleLogger;
public abstract class ProjectBasedModel<INFO> {
protected final HashMap<String, INFO> projectInfos = new HashMap<>();
protected final ListenerListHelper<IProjectModelListener<INFO>> listeners = new ListenerListHelper<>();
public ProjectBasedModel() {
super();
}
protected abstract SimpleLogger getLog();
public void addListener(IProjectModelListener<? super INFO> listener) {
listeners.addListener(listener.castTypeParam());
}
public void removeListener(IProjectModelListener<? super INFO> listener) {
listeners.removeListener(listener.<INFO>castTypeParam());
}
@SuppressWarnings("unchecked")
public synchronized HashMap<String, INFO> connectListener(IProjectModelListener<? super INFO> listener) {
addListener(listener);
return (HashMap<String, INFO>) projectInfos.clone();
}
public synchronized INFO getProjectInfo(IProject project) {
return projectInfos.get(project.getName());
}
public synchronized INFO setProjectInfo(IProject project, INFO newProjectInfo) {
String projectName = project.getName();
assertNotNull(newProjectInfo);
projectInfos.put(projectName, newProjectInfo);
notifyProjectInfoAdded(project, newProjectInfo);
return newProjectInfo;
}
protected synchronized void notifyProjectInfo(IProject project) {
String projectName = project.getName();
INFO info = projectInfos.get(projectName);
if(info != null) {
notifyProjectInfoAdded(project, info);
}
}
/**
* Set a new project info, but only if the current info is the same as given oldProjectInfo
*/
public synchronized boolean updateProjectInfo(IProject project, INFO oldProjectInfo, INFO newProjectInfo) {
String projectName = project.getName();
assertNotNull(newProjectInfo);
if(projectInfos.get(projectName) == oldProjectInfo) {
setProjectInfo(project, newProjectInfo);
return true;
}
return false;
}
public synchronized INFO removeProjectInfo(IProject project) {
INFO oldProjectInfo = projectInfos.remove(project.getName());
if(oldProjectInfo != null) {
notifyProjectRemoved(project, oldProjectInfo);
}
return oldProjectInfo;
}
public synchronized Set<String> getModelProjects() {
return new HashSet<>(projectInfos.keySet());
}
/* ----------------- Notifications ----------------- */
protected void notifyProjectInfoAdded(IProject project, INFO newProjectInfo) {
getLog().println(getClass().getSimpleName() + " info set: " + project.getName());
fireUpdateEvent(new UpdateEvent<INFO>(project, newProjectInfo));
}
@SuppressWarnings("unused")
protected void notifyProjectRemoved(IProject project, INFO oldProjectInfo) {
getLog().println(getClass().getSimpleName() + " info removed: " + project.getName());
fireUpdateEvent(new UpdateEvent<INFO>(project, null));
}
protected void fireUpdateEvent(UpdateEvent<INFO> updateEvent) {
for (IProjectModelListener<INFO> listener : listeners.getListeners()) {
listener.notifyUpdateEvent(updateEvent);
}
}
}