| // Copyright (C) 2012 The Android Open Source Project |
| // |
| // 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.google.gerrit.client.rpc; |
| |
| import com.google.gwt.user.client.rpc.AsyncCallback; |
| |
| /** Transforms a value and passes it on to another callback. */ |
| public abstract class TransformCallback<I, O> implements AsyncCallback<I> { |
| private final AsyncCallback<O> callback; |
| |
| protected TransformCallback(AsyncCallback<O> callback) { |
| this.callback = callback; |
| } |
| |
| @Override |
| public void onSuccess(I result) { |
| callback.onSuccess(transform(result)); |
| } |
| |
| @Override |
| public void onFailure(Throwable caught) { |
| callback.onFailure(caught); |
| } |
| |
| protected abstract O transform(I result); |
| } |