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/*******************************************************************************
* Copyright (c) 2004 - 2006 University Of British Columbia 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:
* University Of British Columbia - initial API and implementation
*******************************************************************************/
package org.eclipse.mylar.tasks.core;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;
import org.eclipse.core.runtime.PlatformObject;
/**
* Manipulate containers via TaskListManager
*
* @author Mik Kersten
*/
public abstract class AbstractTaskContainer extends PlatformObject implements ITaskListElement {
private String handle = "";
private Set<String> childHandles = new CopyOnWriteArraySet<String>();
protected TaskList taskList;
/**
* Optional URL corresponding to the web resource associated with this
* container.
*/
protected String url = null;
public AbstractTaskContainer(String handleAndDescription, TaskList taskList) {
assert handle != null;
this.handle = handleAndDescription;
this.taskList = taskList;
}
public abstract boolean isLocal();
public Set<ITask> getChildren() {
Set<ITask> children = new HashSet<ITask>();
for (String childHandle : childHandles) {
ITask task = taskList.getTask(childHandle);
if (task != null) {
children.add(task);
}
}
return children;
}
public boolean contains(String handle) {
return childHandles.contains(handle);
}
public String getSummary() {
return handle;
}
/**
* @since 2.0
*/
public boolean isEmpty() {
return childHandles.isEmpty();
}
public String getHandleIdentifier() {
return handle;
}
public void setDescription(String description) {
this.handle = description;
}
public void setHandleIdentifier(String handle) {
this.handle = handle;
}
void add(ITask task) {
childHandles.add(task.getHandleIdentifier());
}
void remove(ITask task) {
childHandles.remove(task.getHandleIdentifier());
}
void clear() {
childHandles.clear();
}
public boolean isCompleted() {
return false;
}
@Override
public int hashCode() {
return handle.hashCode();
}
public void setUrl(String url) {
this.url = url;
}
public String getUrl() {
return url;
}
@Override
public boolean equals(Object object) {
if (object == null)
return false;
if (object instanceof AbstractTaskContainer) {
AbstractTaskContainer compare = (AbstractTaskContainer) object;
return this.getHandleIdentifier().equals(compare.getHandleIdentifier());
} else {
return false;
}
}
@Override
public String toString() {
return "container: " + handle;
}
public boolean canRename() {
return true;
}
/**
* The handle for most containers is their summary. Override to specify a
* different natural ordering.
*/
public int compareTo(ITaskListElement taskListElement) {
return getHandleIdentifier().compareTo(((AbstractTaskContainer) taskListElement).getHandleIdentifier());
}
}
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