/*
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.cedarsolutions.client.gwt.custom.tab;
import java.util.HashSet;
import java.util.Set;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.user.client.ui.AttachDetachException;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;
/**
* A widget that throws an exception onLoad or onUnload.
*/
class BadWidget extends Widget {
/**
* Wrap an existing div.
*
* @param element the div to wrap
* @return a {@link BadWidget}
*/
public static BadWidget wrap(Element element) {
// Assert that the element is attached.
assert Document.get().getBody().isOrHasChild(element);
BadWidget widget = new BadWidget(element);
// Mark it attached and remember it for cleanup.
widget.onAttach();
RootPanel.detachOnWindowClose(widget);
return widget;
}
private boolean failOnLoad;
private boolean failOnUnload;
private boolean failAttachChildren;
private boolean failDetachChildren;
public BadWidget() {
this(Document.get().createDivElement());
}
protected BadWidget(Element element) {
setElement(element);
assert element.getTagName().equalsIgnoreCase("div");
}
@Override
public void onLoad() {
if (failOnLoad) {
throw new IllegalArgumentException();
}
}
@Override
public void onUnload() {
if (failOnUnload) {
throw new IllegalArgumentException();
}
}
public void setFailAttachChildren(boolean fail) {
this.failAttachChildren = fail;
}
public void setFailDetachChildren(boolean fail) {
this.failDetachChildren = fail;
}
public void setFailOnLoad(boolean fail) {
this.failOnLoad = fail;
}
public void setFailOnUnload(boolean fail) {
this.failOnUnload = fail;
}
@Override
protected void doAttachChildren() {
if (failAttachChildren) {
Set<Throwable> cause = new HashSet<Throwable>();
cause.add(new IllegalArgumentException());
throw new AttachDetachException(cause);
}
}
@Override
protected void doDetachChildren() {
if (failDetachChildren) {
Set<Throwable> cause = new HashSet<Throwable>();
cause.add(new IllegalArgumentException());
throw new AttachDetachException(cause);
}
}
}