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    • com.google.common.collect.RegularImmutableList Maven / Gradle / Ivy

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    This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

    There is a newer version: 35.0.0.Beta1
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    /*
 * Copyright (C) 2009 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.VisibleForTesting;
import java.util.Spliterator;
import java.util.Spliterators;

/**
 * Implementation of {@link ImmutableList} backed by a simple array.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible(serializable = true, emulated = true)
@SuppressWarnings("serial") // uses writeReplace(), not default serialization
class RegularImmutableList extends ImmutableList {
  static final ImmutableList EMPTY = new RegularImmutableList<>(new Object[0]);

  @VisibleForTesting final transient Object[] array;

  RegularImmutableList(Object[] array) {
    this.array = array;
  }

  @Override
  public int size() {
    return array.length;
  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override
  int copyIntoArray(Object[] dst, int dstOff) {
    System.arraycopy(array, 0, dst, dstOff, array.length);
    return dstOff + array.length;
  }

  // The fake cast to E is safe because the creation methods only allow E's
  @Override
  @SuppressWarnings("unchecked")
  public E get(int index) {
    return (E) array[index];
  }

  @SuppressWarnings("unchecked")
  @Override
  public UnmodifiableListIterator listIterator(int index) {
    // for performance
    // The fake cast to E is safe because the creation methods only allow E's
    return (UnmodifiableListIterator) Iterators.forArray(array, 0, array.length, index);
  }

  @Override
  public Spliterator spliterator() {
    return Spliterators.spliterator(array, SPLITERATOR_CHARACTERISTICS);
  }

  // TODO(lowasser): benchmark optimizations for equals() and see if they're worthwhile
}
    
    
    
    

    




    
    
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