/**
 * Copyright 2010 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 org.waveprotocol.wave.federation.noop;

import com.google.protobuf.ByteString;

import org.waveprotocol.wave.federation.FederationErrors;
import org.waveprotocol.wave.federation.WaveletFederationListener;
import org.waveprotocol.wave.federation.Proto.ProtocolHashedVersion;
import org.waveprotocol.wave.model.id.WaveletName;

import java.util.List;

/**
 * An of {@link WaveletFederationListener.Factory} that returns instances of
 * {@link WaveletFederationListener} that always call the onFailure() method
 * of the callback.
 * 
 * @author tad.glines@gmail.com (Tad Glines)
 */
public class NoOpFederationHost implements WaveletFederationListener.Factory {

  @Override
  public WaveletFederationListener listenerForDomain(String domain) {
    return new WaveletFederationListener() {
      @Override
      public void waveletDeltaUpdate(WaveletName waveletName, List<ByteString> deltas,
          WaveletUpdateCallback callback) {
        callback.onFailure(FederationErrors.badRequest("Federation is not enabled!"));
      }

      @Override
      public void waveletCommitUpdate(WaveletName waveletName,
          ProtocolHashedVersion committedVersion, WaveletUpdateCallback callback) {
        callback.onFailure(FederationErrors.badRequest("Federation is not enabled!"));
      }
    };
  }

}