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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.map.mutable.primitive;

import java.io.IOException;
import java.util.Arrays;
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.function.primitive.LongToObjectFunction;
import com.gs.collections.api.block.function.primitive.ObjectLongToObjectFunction;
import com.gs.collections.api.block.predicate.primitive.LongPredicate;
import com.gs.collections.api.block.procedure.primitive.LongProcedure;
import com.gs.collections.api.iterator.LongIterator;
import com.gs.collections.api.list.primitive.MutableLongList;
import com.gs.collections.api.set.primitive.ImmutableLongSet;
import com.gs.collections.impl.bag.mutable.primitive.LongHashBag;
import com.gs.collections.impl.factory.primitive.LongSets;
import com.gs.collections.impl.lazy.primitive.LazyLongIterableAdapter;
import com.gs.collections.impl.list.mutable.primitive.LongArrayList;
import com.gs.collections.api.set.primitive.LongSet;
import com.gs.collections.api.set.MutableSet;
import com.gs.collections.api.set.primitive.MutableLongSet;
import com.gs.collections.impl.factory.Sets;
import com.gs.collections.impl.set.mutable.primitive.LongHashSet;
import com.gs.collections.impl.set.mutable.primitive.SynchronizedLongSet;
import com.gs.collections.impl.set.mutable.primitive.UnmodifiableLongSet;

/**
 * This file was automatically generated from template file abstractMutablePrimitiveKeySet.stg.
 *
 * @since 6.0.
 */
public abstract class AbstractMutableLongKeySet implements MutableLongSet
{
    private static final long EMPTY_KEY = 0L;
    private static final long REMOVED_KEY = 1L;

    private static boolean isEmptyKey(long key)
    {
        return key == EMPTY_KEY;
    }

    private static boolean isRemovedKey(long key)
    {
        return key == REMOVED_KEY;
    }

    private static boolean isNonSentinel(long key)
    {
        return !isEmptyKey(key) && !isRemovedKey(key);
    }

    protected abstract long getKeyAtIndex(int index);

    protected abstract int getTableSize();

    protected abstract MutableLongKeysMap getOuter();

    protected abstract AbstractSentinelValues getSentinelValues();

    public void forEach(LongProcedure procedure)
    {
        this.each(procedure);
    }

    /**
     * @since 7.0.
     */
    public void each(LongProcedure procedure)
    {
        this.getOuter().forEachKey(procedure);
    }

    public int count(LongPredicate predicate)
    {
        int count = 0;
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey && predicate.accept(EMPTY_KEY))
            {
                count++;
            }
            if (this.getSentinelValues().containsOneKey && predicate.accept(REMOVED_KEY))
            {
                count++;
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)) && predicate.accept(this.getKeyAtIndex(i)))
            {
                count++;
            }
        }
        return count;
    }

    public boolean anySatisfy(LongPredicate predicate)
    {
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey && predicate.accept(EMPTY_KEY))
            {
                return true;
            }
            if (this.getSentinelValues().containsOneKey && predicate.accept(REMOVED_KEY))
            {
                return true;
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)) && predicate.accept(this.getKeyAtIndex(i)))
            {
                return true;
            }
        }
        return false;
    }

    public boolean allSatisfy(LongPredicate predicate)
    {
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey && !predicate.accept(EMPTY_KEY))
            {
                return false;
            }
            if (this.getSentinelValues().containsOneKey && !predicate.accept(REMOVED_KEY))
            {
                return false;
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)) && !predicate.accept(this.getKeyAtIndex(i)))
            {
                return false;
            }
        }
        return true;
    }

    public boolean noneSatisfy(LongPredicate predicate)
    {
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey && predicate.accept(EMPTY_KEY))
            {
                return false;
            }
            if (this.getSentinelValues().containsOneKey && predicate.accept(REMOVED_KEY))
            {
                return false;
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)) && predicate.accept(this.getKeyAtIndex(i)))
            {
                return false;
            }
        }
        return true;
    }

    public boolean add(long element)
    {
        throw new UnsupportedOperationException("Cannot call add() on " + this.getClass().getSimpleName());
    }

    public boolean addAll(long... source)
    {
        throw new UnsupportedOperationException("Cannot call addAll() on " + this.getClass().getSimpleName());
    }

    public boolean addAll(LongIterable source)
    {
        throw new UnsupportedOperationException("Cannot call addAll() on " + this.getClass().getSimpleName());
    }

    public MutableLongSet select(LongPredicate predicate)
    {
        MutableLongSet result = new LongHashSet();
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey && predicate.accept(EMPTY_KEY))
            {
                result.add(EMPTY_KEY);
            }
            if (this.getSentinelValues().containsOneKey && predicate.accept(REMOVED_KEY))
            {
                result.add(REMOVED_KEY);
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)) && predicate.accept(this.getKeyAtIndex(i)))
            {
                result.add(this.getKeyAtIndex(i));
            }
        }
        return result;
    }

    public MutableLongSet reject(LongPredicate predicate)
    {
        MutableLongSet result = new LongHashSet();
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey && !predicate.accept(EMPTY_KEY))
            {
                result.add(EMPTY_KEY);
            }
            if (this.getSentinelValues().containsOneKey && !predicate.accept(REMOVED_KEY))
            {
                result.add(REMOVED_KEY);
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)) && !predicate.accept(this.getKeyAtIndex(i)))
            {
                result.add(this.getKeyAtIndex(i));
            }
        }
        return result;
    }

    public MutableLongSet with(long element)
    {
        throw new UnsupportedOperationException("Cannot call with() on " + this.getClass().getSimpleName());
    }

    public MutableLongSet without(long element)
    {
        throw new UnsupportedOperationException("Cannot call without() on " + this.getClass().getSimpleName());
    }

    public MutableLongSet withAll(LongIterable elements)
    {
        throw new UnsupportedOperationException("Cannot call withAll() on " + this.getClass().getSimpleName());
    }

    public MutableLongSet withoutAll(LongIterable elements)
    {
        throw new UnsupportedOperationException("Cannot call withoutAll() on " + this.getClass().getSimpleName());
    }

    public  MutableSet collect(LongToObjectFunction function)
    {
        MutableSet result = Sets.mutable.with();
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey)
            {
                result.add(function.valueOf(EMPTY_KEY));
            }
            if (this.getSentinelValues().containsOneKey)
            {
                result.add(function.valueOf(REMOVED_KEY));
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)))
            {
                result.add(function.valueOf(this.getKeyAtIndex(i)));
            }
        }
        return result;
    }

    public boolean remove(long key)
    {
        int oldSize = this.getOuter().size();
        this.getOuter().removeKey(key);
        return oldSize != this.getOuter().size();
    }

    public boolean removeAll(LongIterable source)
    {
        int oldSize = this.getOuter().size();
        LongIterator iterator = source.longIterator();
        while (iterator.hasNext())
        {
            this.getOuter().removeKey(iterator.next());
        }
        return oldSize != this.getOuter().size();
    }

    public boolean removeAll(long... source)
    {
        int oldSize = this.getOuter().size();
        for (long item : source)
        {
            this.getOuter().removeKey(item);
        }
        return oldSize != this.getOuter().size();
    }

    public void clear()
    {
        this.getOuter().clear();
    }

    public long detectIfNone(LongPredicate predicate, long ifNone)
    {
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey && predicate.accept(EMPTY_KEY))
            {
                return EMPTY_KEY;
            }
            if (this.getSentinelValues().containsOneKey && predicate.accept(REMOVED_KEY))
            {
                return REMOVED_KEY;
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)) && predicate.accept(this.getKeyAtIndex(i)))
            {
                return this.getKeyAtIndex(i);
            }
        }
        return ifNone;
    }

    public MutableLongSet asUnmodifiable()
    {
        return UnmodifiableLongSet.of(this);
    }

    public MutableLongSet asSynchronized()
    {
        return SynchronizedLongSet.of(this);
    }

    public long sum()
    {
        long result = 0L;
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey)
            {
                result += EMPTY_KEY;
            }
            if (this.getSentinelValues().containsOneKey)
            {
                result += REMOVED_KEY;
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)))
            {
                result += this.getKeyAtIndex(i);
            }
        }
        return result;
    }

    public long max()
    {
        if (this.getOuter().isEmpty())
        {
            throw new NoSuchElementException();
        }

        long max = 0;
        boolean isMaxSet = false;

        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey)
            {
                max = EMPTY_KEY;
                isMaxSet = true;
            }
            if (this.getSentinelValues().containsOneKey)
            {
                max = REMOVED_KEY;
                isMaxSet = true;
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)) && (!isMaxSet || max < this.getKeyAtIndex(i)))
            {
                max = this.getKeyAtIndex(i);
                isMaxSet = true;
            }
        }
        return max;
    }

    public long maxIfEmpty(long defaultValue)
    {
        if (this.getOuter().isEmpty())
        {
            return defaultValue;
        }

        return this.max();
    }

    public long min()
    {
        if (this.getOuter().isEmpty())
        {
            throw new NoSuchElementException();
        }

        long min = 0;
        boolean isMinSet = false;

        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey)
            {
                min = EMPTY_KEY;
                isMinSet = true;
            }
            if (this.getSentinelValues().containsOneKey && !isMinSet)
            {
                min = REMOVED_KEY;
                isMinSet = true;
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)) && (!isMinSet || this.getKeyAtIndex(i) < min))
            {
                min = this.getKeyAtIndex(i);
                isMinSet = true;
            }
        }
        return min;
    }

    public long minIfEmpty(long defaultValue)
    {
        if (this.getOuter().isEmpty())
        {
            return defaultValue;
        }

        return this.min();
    }

    public double average()
    {
        if (this.isEmpty())
        {
            throw new ArithmeticException();
        }
        return (double) this.sum() / (double) this.size();
    }

    public double median()
    {
        if (this.isEmpty())
        {
            throw new ArithmeticException();
        }
        long[] sortedArray = this.toSortedArray();
        int middleIndex = sortedArray.length >> 1;
        if (sortedArray.length > 1 && (sortedArray.length & 1) == 0)
        {
            long first = sortedArray[middleIndex];
            long second = sortedArray[middleIndex - 1];
            return ((double) first + (double) second) / 2.0;
        }
        return (double) sortedArray[middleIndex];
    }

    public long[] toSortedArray()
    {
        long[] array = this.toArray();
        Arrays.sort(array);
        return array;
    }

    public MutableLongList toSortedList()
    {
        return LongArrayList.newList(this).sortThis();
    }

    public long[] toArray()
    {
        int size = this.getOuter().size();
        final long[] result = new long[size];
        this.getOuter().forEachKey(new LongProcedure()
        {
            private int index;

            public void value(long each)
            {
                result[this.index] = each;
                this.index++;
            }
        });
        return result;
    }

    public boolean contains(long value)
    {
        return this.getOuter().containsKey(value);
    }

    public boolean containsAll(long... source)
    {
        for (long item : source)
        {
            if (!this.getOuter().containsKey(item))
            {
                return false;
            }
        }
        return true;
    }

    public boolean containsAll(LongIterable source)
    {
        LongIterator iterator = source.longIterator();
        while (iterator.hasNext())
        {
            if (!this.getOuter().containsKey(iterator.next()))
            {
                return false;
            }
        }
        return true;
    }

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

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

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

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

    public  T injectInto(T injectedValue, ObjectLongToObjectFunction function)
    {
        T result = injectedValue;
        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey)
            {
                result = function.valueOf(result, EMPTY_KEY);
            }
            if (this.getSentinelValues().containsOneKey)
            {
                result = function.valueOf(result, REMOVED_KEY);
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)))
            {
                result = function.valueOf(result, this.getKeyAtIndex(i));
            }
        }
        return result;
    }

    public ImmutableLongSet toImmutable()
    {
        return LongSets.immutable.withAll(this);
    }

    public int size()
    {
        return this.getOuter().size();
    }

    public boolean isEmpty()
    {
        return this.getOuter().isEmpty();
    }

    public boolean notEmpty()
    {
        return this.getOuter().notEmpty();
    }

    @Override
    public boolean equals(Object obj)
    {
        if (this == obj)
        {
            return true;
        }

        if (!(obj instanceof LongSet))
        {
            return false;
        }

        LongSet other = (LongSet) obj;
        return this.size() == other.size() && this.containsAll(other.toArray());
    }

    @Override
    public int hashCode()
    {
        int result = 0;

        if (this.getSentinelValues() != null)
        {
            if (this.getSentinelValues().containsZeroKey)
            {
                result += (int) (EMPTY_KEY ^ EMPTY_KEY >>> 32);
            }
            if (this.getSentinelValues().containsOneKey)
            {
                result += (int) (REMOVED_KEY ^ REMOVED_KEY >>> 32);
            }
        }
        for (int i = 0; i < this.getTableSize(); i++)
        {
            if (isNonSentinel(this.getKeyAtIndex(i)))
            {
                result += (int) (this.getKeyAtIndex(i) ^ this.getKeyAtIndex(i) >>> 32);
            }
        }

        return result;
    }

    @Override
    public String toString()
    {
        return this.makeString("[", ", ", "]");
    }

    public String makeString()
    {
        return this.makeString(", ");
    }

    public String makeString(String separator)
    {
        return this.makeString("", separator, "");
    }

    public String makeString(String start, String separator, String end)
    {
        Appendable stringBuilder = new StringBuilder();
        this.appendString(stringBuilder, start, separator, end);
        return stringBuilder.toString();
    }

    public void appendString(Appendable appendable)
    {
        this.appendString(appendable, ", ");
    }

    public void appendString(Appendable appendable, String separator)
    {
        this.appendString(appendable, "", separator, "");
    }

    public void appendString(Appendable appendable, String start, String separator, String end)
    {
        try
        {
            appendable.append(start);
            boolean first = true;
            if (this.getSentinelValues() != null)
            {
                if (this.getSentinelValues().containsZeroKey)
                {
                    appendable.append(String.valueOf(EMPTY_KEY));
                    first = false;
                }
                if (this.getSentinelValues().containsOneKey)
                {
                    if (!first)
                    {
                        appendable.append(separator);
                    }
                    appendable.append(String.valueOf(REMOVED_KEY));
                    first = false;
                }
            }
            for (int i = 0; i < this.getTableSize(); i++)
            {
                if (isNonSentinel(this.getKeyAtIndex(i)))
                {
                    if (!first)
                    {
                        appendable.append(separator);
                    }
                    appendable.append(String.valueOf(this.getKeyAtIndex(i)));
                    first = false;
                }
            }
            appendable.append(end);
        }
        catch (IOException e)
        {
            throw new RuntimeException(e);
        }
    }
}