com.gwtplatform.common.client.CodeSplitBundleProvider Maven / Gradle / Ivy
/*
* Copyright 2011 ArcBees 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.gwtplatform.common.client;
import com.google.gwt.inject.client.AsyncProvider;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.inject.Provider;
/**
* Implements a {@link IndirectProvider} that uses code splitting for a specific
* type. The object will be provided from a {@link ProviderBundle}.
*
* @param The type of the provided object.
* @param The type of the {@link ProviderBundle} providing this object.
*/
public final class CodeSplitBundleProvider
implements IndirectProvider {
private final AsyncProvider bundleProvider;
private final int providerId;
/**
* Construct a {@link IndirectProvider} that implements code splitting for a
* specific type. The object will be provided from a {@link ProviderBundle}.
*
* @param bundleProvider The {@link ProviderBundle} providing the object.
* @param providerId The identifier of the provided object, within the
* {@link ProviderBundle}.
*/
public CodeSplitBundleProvider(AsyncProvider bundleProvider, int providerId) {
this.bundleProvider = bundleProvider;
this.providerId = providerId;
}
@Override
public void get(final AsyncCallback callback) {
bundleProvider.get(new AsyncCallback() {
@Override
public void onFailure(Throwable caught) {
callback.onFailure(caught);
}
@SuppressWarnings("unchecked")
@Override
public void onSuccess(B providerBundle) {
callback.onSuccess(((Provider) providerBundle.get(providerId)).get());
}
});
}
}