com.google.common.collect.RegularImmutableAsList Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of guava Show documentation

Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more.

There is a newer version: 33.3.0-jre

Show newest version

/*
 * Copyright (C) 2012 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 com.google.common.collect;

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

/**
 * An {@link ImmutableAsList} implementation specialized for when the delegate collection is
 * already backed by an {@code ImmutableList} or array.
 *
 * @author Louis Wasserman
 */
@GwtCompatible(emulated = true)
@SuppressWarnings("serial") // uses writeReplace, not default serialization
class RegularImmutableAsList extends ImmutableAsList {
  private final ImmutableCollection delegate;
  private final ImmutableList delegateList;

  RegularImmutableAsList(ImmutableCollection delegate, ImmutableList delegateList) {
    this.delegate = delegate;
    this.delegateList = delegateList;
  }

  RegularImmutableAsList(ImmutableCollection delegate, Object[] array) {
    this(delegate, ImmutableList.asImmutableList(array));
  }

  RegularImmutableAsList(ImmutableCollection delegate, Object[] array, int size) {
    this(delegate, ImmutableList.asImmutableList(array, size));
  }

  @Override
  ImmutableCollection delegateCollection() {
    return delegate;
  }

  ImmutableList delegateList() {
    return delegateList;
  }

  @SuppressWarnings("unchecked") // safe covariant cast!
  @Override
  public UnmodifiableListIterator listIterator(int index) {
    return (UnmodifiableListIterator) delegateList.listIterator(index);
  }

  @GwtIncompatible // not present in emulated superclass
  @Override
  int copyIntoArray(Object[] dst, int offset) {
    return delegateList.copyIntoArray(dst, offset);
  }

  @Override
  public E get(int index) {
    return delegateList.get(index);
  }
}