/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.waveprotocol.wave.client;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.GWT.UncaughtExceptionHandler;
import org.waveprotocol.wave.client.common.util.AsyncHolder;
import org.waveprotocol.wave.client.common.util.JsoCollectionFactory;
import org.waveprotocol.wave.model.util.CollectionUtils;
/**
* Encapsulates the entry level module for Undercurrent.
*
* This zeroeth stage is only intended to load critical code that has an
* important reason to be loaded first (e.g., exception handling).
*
*/
public interface StageZero {
/**
* Default implementation of the zeroeth stage.
*/
public class DefaultProvider extends AsyncHolder.Impl<StageZero> implements StageZero {
@Override
protected final void create(Accessor<StageZero> whenReady) {
onStageInit();
// TODO: enable webdriver hook.
GWT.setUncaughtExceptionHandler(createUncaughtExceptionHandler());
if (GWT.isScript()) {
CollectionUtils.setDefaultCollectionFactory(new JsoCollectionFactory());
}
onStageLoaded();
whenReady.use(this);
}
/** Notifies this provider that the stage is about to be loaded. */
protected void onStageInit() {
}
/** Notifies this provider that the stage has been loaded. */
protected void onStageLoaded() {
}
/** @return the uncaught exception handler to install. */
protected UncaughtExceptionHandler createUncaughtExceptionHandler() {
// Use GWT's one by default.
return GWT.getUncaughtExceptionHandler();
}
}
}