NullTypedSource.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.client.util;


/**
 * A TypedSource that does nothing
 *
 * @author zdwang@google.com (David Wang)
 */
public class NullTypedSource implements TypedSource {

  @Override
  public Boolean getBoolean(String key) {
    return null;
  }

  @Override
  public Double getDouble(String key) {
    return null;
  }

  @Override
  public Integer getInteger(String key) {
    return null;
  }

  @Override
  public String getString(String key) {
    return null;
  }

}