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GS Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.

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/*
 * Copyright 2014 Goldman Sachs.
 *
 * 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.gs.collections.impl.lazy.primitive;

import java.util.NoSuchElementException;

import com.gs.collections.api.LongIterable;
import com.gs.collections.api.LazyLongIterable;
import com.gs.collections.api.bag.primitive.MutableLongBag;
import com.gs.collections.api.block.procedure.primitive.LongProcedure;
import com.gs.collections.api.iterator.LongIterator;
import com.gs.collections.api.list.primitive.LongList;
import com.gs.collections.api.list.primitive.MutableLongList;
import com.gs.collections.api.set.primitive.MutableLongSet;
import com.gs.collections.impl.bag.mutable.primitive.LongHashBag;
import com.gs.collections.impl.lazy.ReverseIterable;
import com.gs.collections.impl.list.mutable.primitive.LongArrayList;
import com.gs.collections.impl.set.mutable.primitive.LongHashSet;

/**
 * This file was automatically generated from template file reversePrimitiveIterable.stg.
 *
 * @see ReverseIterable
 * @since 5.0.
 */
public class ReverseLongIterable extends AbstractLazyLongIterable
{
    private final LongList adapted;

    public ReverseLongIterable(LongList newAdapted)
    {
        this.adapted = newAdapted;
    }

    public static ReverseLongIterable adapt(LongList longList)
    {
        return new ReverseLongIterable(longList);
    }

    public LongIterator longIterator()
    {
        return new ReverseLongIterator();
    }

    /**
     * @since 7.0.
     */
    public void each(LongProcedure procedure)
    {
        LongIterator iterator = this.longIterator();
        while (iterator.hasNext())
        {
            procedure.value(iterator.next());
        }
    }

    @Override
    public long sum()
    {
        return this.adapted.sum();
    }

    @Override
    public long max()
    {
        return this.adapted.max();
    }

    @Override
    public long min()
    {
        return this.adapted.min();
    }

    @Override
    public long minIfEmpty(long defaultValue)
    {
        if (this.adapted.isEmpty())
        {
            return defaultValue;
        }
        return this.adapted.min();
    }

    @Override
    public long maxIfEmpty(long defaultValue)
    {
        if (this.adapted.isEmpty())
        {
            return defaultValue;
        }
        return this.adapted.max();
    }

    @Override
    public double average()
    {
        return this.adapted.average();
    }

    @Override
    public double median()
    {
        return this.adapted.median();
    }

    @Override
    public long[] toSortedArray()
    {
        return this.adapted.toSortedArray();
    }

    @Override
    public long[] toArray()
    {
        long[] results = new long[this.adapted.size()];
        int index = 0;
        LongIterator iterator = this.longIterator();
        while (iterator.hasNext())
        {
            results[index] = iterator.next();
            index++;
        }
        return results;
    }

    @Override
    public boolean contains(long value)
    {
        return this.adapted.contains(value);
    }

    @Override
    public boolean containsAll(long... source)
    {
        return this.adapted.containsAll(source);
    }

    @Override
    public boolean containsAll(LongIterable source)
    {
        return this.adapted.containsAll(source);
    }

    @Override
    public int size()
    {
        return this.adapted.size();
    }

    @Override
    public boolean isEmpty()
    {
        return this.adapted.isEmpty();
    }

    @Override
    public boolean notEmpty()
    {
        return this.adapted.notEmpty();
    }

    @Override
    public MutableLongList toList()
    {
        return LongArrayList.newList(this);
    }

    @Override
    public MutableLongSet toSet()
    {
        return LongHashSet.newSet(this);
    }

    @Override
    public MutableLongBag toBag()
    {
        return LongHashBag.newBag(this);
    }

    @Override
    public LazyLongIterable asLazy()
    {
        return new LazyLongIterableAdapter(this);
    }

    private class ReverseLongIterator implements LongIterator
    {
        /**
         * Index of element to be returned by subsequent call to next.
         */
        private int currentIndex = ReverseLongIterable.this.adapted.size() - 1;

        public boolean hasNext()
        {
            return this.currentIndex != -1;
        }

        public long next()
        {
            if (!this.hasNext())
            {
                throw new NoSuchElementException();
            }
            long next = ReverseLongIterable.this.adapted.get(this.currentIndex);
            this.currentIndex--;
            return next;
        }
    }
}