ParticipantIdSerializer.java

/**
 * 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.model.wave;

import org.waveprotocol.wave.model.util.Serializer;

/**
 * A serializer for ParticipantId objects. Stores them as the address.
 *
 */
public final class ParticipantIdSerializer {

  public static final Serializer<ParticipantId> INSTANCE = new Serializer<ParticipantId>() {
    @Override
    public ParticipantId fromString(String s) {
      // NOTE(user): We don't have a good general way of handling malformed
      // data :-(
      return s == null ? null : ParticipantId.ofUnsafe(s);
    }

    @Override
    public ParticipantId fromString(String s, ParticipantId defaultValue) {
      if (s != null) {
        return fromString(s);
      }
      return defaultValue;
    }

    @Override
    public String toString(ParticipantId x) {
      return x == null ? null : x.getAddress();
    }
  };

  private ParticipantIdSerializer() {
  }
}