OptionTranslator.java

/*
 * Copyright (C) 2012 Facebook, 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.facebook.config.dynamic;

import com.google.common.base.Function;

public class OptionTranslator<From, To> extends OptionImpl<To> {
  public OptionTranslator(final Option<From> option, final Function<From, To> translator) {
    setValue(translator.apply(option.getValue()));
    option.addWatcher(new OptionWatcher<From>() {
      @Override
      public void propertyUpdated(From value) throws Exception {
        setValue(translator.apply(option.getValue()));
      }
    });
  }
}