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/*******************************************************************************
* Copyright (c) 2009 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.common.utility.tests.internal.model;
import java.util.EventListener;
import junit.framework.TestCase;
import org.eclipse.jpt.common.utility.internal.CollectionTools;
import org.eclipse.jpt.common.utility.internal.ListenerList;
import org.eclipse.jpt.common.utility.internal.model.AbstractModel;
import org.eclipse.jpt.common.utility.internal.model.ChangeSupport;
import org.eclipse.jpt.common.utility.model.Model;
import org.eclipse.jpt.common.utility.model.event.ChangeEvent;
import org.eclipse.jpt.common.utility.tests.internal.TestTools;
/**
* test what it takes to add a new type of event to
* model and change support
*/
public class NewEventTests extends TestCase {
private Foo foo;
public NewEventTests(String name) {
super(name);
}
@Override
protected void setUp() throws Exception {
super.setUp();
this.foo = new Foo();
}
@Override
protected void tearDown() throws Exception {
TestTools.clear(this);
super.tearDown();
}
public void testHasNoFooChangeListeners() {
assertTrue(this.foo.hasNoFooChangeListeners());
LocalListener listener = new LocalListener();
this.foo.addFooChangeListener(listener);
assertFalse(this.foo.hasNoFooChangeListeners());
this.foo.removeFooChangeListener(listener);
assertTrue(this.foo.hasNoFooChangeListeners());
}
public void testHasAnyFooChangeListeners() {
assertFalse(this.foo.hasAnyFooChangeListeners());
LocalListener listener = new LocalListener();
this.foo.addFooChangeListener(listener);
assertTrue(this.foo.hasAnyFooChangeListeners());
this.foo.removeFooChangeListener(listener);
assertFalse(this.foo.hasAnyFooChangeListeners());
}
public void testFireFooChangeEvent() {
LocalListener listener = new LocalListener();
assertFalse(listener.receivedFooEvent);
this.foo.addFooChangeListener(listener);
this.foo.foo();
assertTrue(listener.receivedFooEvent);
}
// ********** harness classes **********
class Foo extends AbstractFooModel {
Foo() {
super();
}
void foo() {
this.fireFooChangeEvent();
}
}
class LocalListener implements FooChangeListener {
boolean receivedFooEvent = false;
LocalListener() {
super();
}
public void fooChanged(FooChangeEvent event) {
this.receivedFooEvent = true;
}
}
interface FooModel extends Model {
void addFooChangeListener(FooChangeListener listener);
void removeFooChangeListener(FooChangeListener listener);
}
interface FooChangeListener extends EventListener {
void fooChanged(FooChangeEvent event);
}
static class FooChangeEvent extends ChangeEvent {
private static final long serialVersionUID = 1L;
public FooChangeEvent(FooModel source) {
super(source);
}
public FooChangeEvent clone(Model newSource) {
return new FooChangeEvent((FooModel) newSource);
}
}
static class AbstractFooModel extends AbstractModel implements FooModel {
@Override
protected synchronized FooChangeSupport getChangeSupport() {
return (FooChangeSupport) super.getChangeSupport();
}
@Override
protected ChangeSupport buildChangeSupport() {
return new FooChangeSupport(this);
}
public void addFooChangeListener(FooChangeListener listener) {
this.getChangeSupport().addFooChangeListener(listener);
}
public void removeFooChangeListener(FooChangeListener listener) {
this.getChangeSupport().removeFooChangeListener(listener);
}
protected void fireFooChangeEvent() {
this.getChangeSupport().fireFooChanged();
}
public boolean hasAnyFooChangeListeners() {
return this.getChangeSupport().hasAnyFooChangeListeners();
}
public boolean hasNoFooChangeListeners() {
return ! this.hasAnyFooChangeListeners();
}
}
static class FooChangeSupport extends ChangeSupport {
FooChangeSupport(FooModel source) {
super(source);
}
protected static final Class<FooChangeListener> FOO_CHANGE_LISTENER_CLASS = FooChangeListener.class;
void addFooChangeListener(FooChangeListener listener) {
this.addListener(FOO_CHANGE_LISTENER_CLASS, listener);
}
void removeFooChangeListener(FooChangeListener listener) {
this.removeListener(FOO_CHANGE_LISTENER_CLASS, listener);
}
public boolean hasAnyFooChangeListeners() {
return this.hasAnyListeners(FOO_CHANGE_LISTENER_CLASS);
}
private ListenerList<FooChangeListener> getFooChangeListenerList() {
return this.getListenerList(FOO_CHANGE_LISTENER_CLASS);
}
private Iterable<FooChangeListener> getFooChangeListeners() {
ListenerList<FooChangeListener> listenerList = this.getFooChangeListenerList();
return (listenerList == null) ? null : listenerList.getListeners();
}
private boolean hasFooChangeListener(FooChangeListener listener) {
return CollectionTools.contains(this.getFooChangeListeners(), listener);
}
public void fireFooChanged() {
Iterable<FooChangeListener> listeners = this.getFooChangeListeners();
if (listeners != null) {
FooChangeEvent event = null;
for (FooChangeListener listener : listeners) {
if (this.hasFooChangeListener(listener)) {
if (event == null) {
// here's the reason for the duplicate code...
event = new FooChangeEvent((FooModel) this.source);
}
listener.fooChanged(event);
}
}
}
}
}
}
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