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/*
 * Copyright (C) 2008 The Guava Authors
 *
 * 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 shaded.shaded.com.google.common.collect;

import shaded.shaded.com.google.common.annotations.GwtCompatible;

/**
 * Bimap with one or more mappings.
 * 
 * @author Jared Levy
 */
@GwtCompatible(serializable = true, emulated = true)
@SuppressWarnings("serial") // uses writeReplace(), not default serialization
class RegularImmutableBiMap extends ImmutableBiMap {
  final transient ImmutableMap delegate;
  final transient ImmutableBiMap inverse;

  RegularImmutableBiMap(ImmutableMap delegate) {
    this.delegate = delegate;

    ImmutableMap.Builder builder = ImmutableMap.builder();
    for (Entry entry : delegate.entrySet()) {
      builder.put(entry.getValue(), entry.getKey());
    }
    ImmutableMap backwardMap = builder.build();
    this.inverse = new RegularImmutableBiMap(backwardMap, this);
  }

  RegularImmutableBiMap(ImmutableMap delegate,
      ImmutableBiMap inverse) {
    this.delegate = delegate;
    this.inverse = inverse;
  }

  @Override ImmutableMap delegate() {
    return delegate;
  }

  @Override public ImmutableBiMap inverse() {
    return inverse;
  }

  @Override boolean isPartialView() {
    return delegate.isPartialView() || inverse.delegate().isPartialView();
  }
}