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Fluent, object-oriented Java API for YouTrack.
There is a newer version: 1.1.0-rc59
/*
 * Copyright 2017 George Aristy
 *
 * 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.llorllale.youtrack.api;

import java.util.Collection;
import java.util.Comparator;
import java.util.Iterator;
import java.util.Optional;
import java.util.Spliterator;
import java.util.Spliterators;
import java.util.function.BiConsumer;
import java.util.function.BiFunction;
import java.util.function.BinaryOperator;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.IntFunction;
import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.function.ToDoubleFunction;
import java.util.function.ToIntFunction;
import java.util.function.ToLongFunction;
import java.util.stream.Collector;
import java.util.stream.DoubleStream;
import java.util.stream.IntStream;
import java.util.stream.LongStream;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

/**
 * Handy class to encapsulate several inputs as a {@link Stream}.
 *
 * @author George Aristy ([email protected])
 * @param  the stream's type
 * @since 1.0.0
 */
@SuppressWarnings({"checkstyle:MethodCount", "checkstyle:ClassFanOutComplexity"})
final class StreamOf implements Stream {
  private final Stream stream;

  /**
   * Primary ctor.
   * 
   * @param stream the actual stream implementation 
   * @since 1.0.0
   */
  private StreamOf(Stream stream) {
    this.stream = stream;
  }

  /**
   * Encapsulates the collection as a stream.
   * 
   * @param coll collection to encapsulate
   * @since 1.0.0
   */
  StreamOf(Collection coll) {
    this(coll.stream());
  }

  /**
   * Encapsulates the given iterator as a stream.
   * 
   * @param iter the iterator to encapsulate
   * @since 1.0.0
   */
  StreamOf(Iterator iter) {
    this(
        StreamSupport.stream(
            Spliterators.spliteratorUnknownSize(iter, Spliterator.DISTINCT), 
            false
        )
    );
  }

  @Override
  public Stream filter(Predicate predicate) {
    return this.stream.filter(predicate);
  }

  @Override
  public  Stream map(Function mapper) {
    return this.stream.map(mapper);
  }

  @Override
  public IntStream mapToInt(ToIntFunction mapper) {
    return this.stream.mapToInt(mapper);
  }

  @Override
  public LongStream mapToLong(ToLongFunction mapper) {
    return this.stream.mapToLong(mapper);
  }

  @Override
  public DoubleStream mapToDouble(ToDoubleFunction mapper) {
    return this.stream.mapToDouble(mapper);
  }

  @Override
  public  Stream flatMap(Function> mapper) {
    return this.stream.flatMap(mapper);
  }

  @Override
  public IntStream flatMapToInt(Function mapper) {
    return this.stream.flatMapToInt(mapper);
  }

  @Override
  public LongStream flatMapToLong(Function mapper) {
    return this.stream.flatMapToLong(mapper);
  }

  @Override
  public DoubleStream flatMapToDouble(Function mapper) {
    return this.stream.flatMapToDouble(mapper);
  }

  @Override
  public Stream distinct() {
    return this.stream.distinct();
  }

  @Override
  public Stream sorted() {
    return this.stream.sorted();
  }

  @Override
  public Stream sorted(Comparator comparator) {
    return this.stream.sorted(comparator);
  }

  @Override
  public Stream peek(Consumer action) {
    return this.stream.peek(action);
  }

  @Override
  public Stream limit(long maxSize) {
    return this.stream.limit(maxSize);
  }

  @Override
  public Stream skip(long n) {
    return this.stream.skip(n);
  }

  @Override
  public void forEach(Consumer action) {
    this.stream.forEach(action);
  }

  @Override
  public void forEachOrdered(Consumer action) {
    this.stream.forEachOrdered(action);
  }

  @Override
  public Object[] toArray() {
    return this.stream.toArray();
  }

  @Override
  public  A[] toArray(IntFunction generator) {
    return this.stream.toArray(generator);
  }

  @Override
  public T reduce(T identity, BinaryOperator accumulator) {
    return this.stream.reduce(identity, accumulator);
  }

  @Override
  public Optional reduce(BinaryOperator accumulator) {
    return this.stream.reduce(accumulator);
  }

  @Override
  public  U reduce(
      U identity, BiFunction accumulator, 
      BinaryOperator combiner
  ) {
    return this.stream.reduce(identity, accumulator, combiner);
  }

  @Override
  public  R collect(
      Supplier supplier, 
      BiConsumer accumulator, 
      BiConsumer combiner
  ) {
    return this.stream.collect(supplier, accumulator, combiner);
  }

  @Override
  public  R collect(Collector collector) {
    return this.stream.collect(collector);
  }

  @Override
  public Optional min(Comparator comparator) {
    return this.stream.min(comparator);
  }

  @Override
  public Optional max(Comparator comparator) {
    return this.stream.max(comparator);
  }

  @Override
  public long count() {
    return this.stream.count();
  }

  @Override
  public boolean anyMatch(Predicate predicate) {
    return this.stream.anyMatch(predicate);
  }

  @Override
  public boolean allMatch(Predicate predicate) {
    return this.stream.allMatch(predicate);
  }

  @Override
  public boolean noneMatch(Predicate predicate) {
    return this.stream.noneMatch(predicate);
  }

  @Override
  public Optional findFirst() {
    return this.stream.findFirst();
  }

  @Override
  public Optional findAny() {
    return this.stream.findAny();
  }

  @Override
  public Iterator iterator() {
    return this.stream.iterator();
  }

  @Override
  public Spliterator spliterator() {
    return this.stream.spliterator();
  }

  @Override
  public boolean isParallel() {
    return this.stream.isParallel();
  }

  @Override
  public Stream sequential() {
    return this.stream.sequential();
  }

  @Override
  public Stream parallel() {
    return this.stream.parallel();
  }

  @Override
  public Stream unordered() {
    return this.stream.unordered();
  }

  @Override
  public Stream onClose(Runnable closeHandler) {
    return this.stream.onClose(closeHandler);
  }

  @Override
  public void close() {
    this.stream.close();
  }
}