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A library with a number of convenient methods for working with collections

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/**
 * Copyright (C) 2011 Brian Ferris 
 *
 * 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.onebusaway.collections.adapter;

import java.util.Map.Entry;

class MapEntryValueAdapter implements
    IAdapter, Entry> {

  private IAdapter _adapter;

  public MapEntryValueAdapter(IAdapter adapter) {
    _adapter = adapter;
  }

  @Override
  public Entry adapt(Entry source) {
    TO_VALUE v = AdapterLibrary.apply(_adapter, source.getValue());
    return new EntryImpl(source.getKey(), v);
  }

  private static class EntryImpl implements Entry {

    private final K _key;
    private final V _value;

    public EntryImpl(K key, V value) {
      _key = key;
      _value = value;
    }

    @Override
    public K getKey() {
      return _key;
    }

    @Override
    public V getValue() {
      return _value;
    }

    @Override
    public V setValue(V value) {
      throw new UnsupportedOperationException();
    }
  }

}