com.google.gwt.emul.java.util.PrimitiveIterator Maven / Gradle / Ivy

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/*
 * Copyright 2015 Google 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 java.util;

import static javaemul.internal.InternalPreconditions.checkNotNull;

import java.util.function.Consumer;
import java.util.function.DoubleConsumer;
import java.util.function.IntConsumer;
import java.util.function.LongConsumer;

/**
 * See 
 * the official Java API doc for details.
 *
 * @param  element type
 * @param  consumer type
 */
public interface PrimitiveIterator extends Iterator {

  void forEachRemaining(C consumer);

  /**
   * See 
   * the official Java API doc for details.
   */
  interface OfDouble extends PrimitiveIterator {
    double nextDouble();

    @Override
    default Double next() {
      return nextDouble();
    }

    @Override
    default void forEachRemaining(DoubleConsumer consumer) {
      checkNotNull(consumer);
      while (hasNext()) {
        consumer.accept(nextDouble());
      }
    }

    @Override
    default void forEachRemaining(Consumer consumer) {
      if (consumer instanceof DoubleConsumer) {
        forEachRemaining((DoubleConsumer) consumer);
      } else {
        forEachRemaining((DoubleConsumer) consumer::accept);
      }
    }
  }

  /**
   * See 
   * the official Java API doc for details.
   */
  interface OfInt extends PrimitiveIterator {
    int nextInt();

    @Override
    default Integer next() {
      return nextInt();
    }

    @Override
    default void forEachRemaining(IntConsumer consumer) {
      checkNotNull(consumer);
      while (hasNext()) {
        consumer.accept(nextInt());
      }
    }

    @Override
    default void forEachRemaining(Consumer consumer) {
      if (consumer instanceof IntConsumer) {
        forEachRemaining((IntConsumer) consumer);
      } else {
        forEachRemaining((IntConsumer) consumer::accept);
      }
    }
  }

  /**
   * See 
   * the official Java API doc for details.
   */
  interface OfLong extends PrimitiveIterator {
    long nextLong();

    @Override
    default Long next() {
      return nextLong();
    }

    @Override
    default void forEachRemaining(LongConsumer consumer) {
      checkNotNull(consumer);
      while (hasNext()) {
        consumer.accept(nextLong());
      }
    }

    @Override
    default void forEachRemaining(Consumer consumer) {
      if (consumer instanceof LongConsumer) {
        forEachRemaining((LongConsumer) consumer);
      } else {
        forEachRemaining((LongConsumer) consumer::accept);
      }
    }
  }

}