org.eclipse.collections.impl.multimap.set.strategy.UnifiedSetWithHashingStrategyMultimap Maven / Gradle / Ivy

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/*
 * Copyright (c) 2022 Goldman Sachs and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.impl.multimap.set.strategy;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

import org.eclipse.collections.api.RichIterable;
import org.eclipse.collections.api.block.HashingStrategy;
import org.eclipse.collections.api.block.predicate.Predicate2;
import org.eclipse.collections.api.factory.Maps;
import org.eclipse.collections.api.map.MutableMap;
import org.eclipse.collections.api.multimap.Multimap;
import org.eclipse.collections.api.multimap.set.MutableSetMultimap;
import org.eclipse.collections.api.set.MutableSet;
import org.eclipse.collections.api.tuple.Pair;
import org.eclipse.collections.impl.map.mutable.UnifiedMap;
import org.eclipse.collections.impl.multimap.set.AbstractMutableSetMultimap;
import org.eclipse.collections.impl.set.strategy.mutable.UnifiedSetWithHashingStrategy;
import org.eclipse.collections.impl.utility.Iterate;

public final class UnifiedSetWithHashingStrategyMultimap
        extends AbstractMutableSetMultimap implements Externalizable
{
    private static final long serialVersionUID = 1L;
    private HashingStrategy hashingStrategy;

    /**
     * @deprecated Empty default constructor used for serialization. Instantiating an UnifiedSetWithHashingStrategyMultimap with
     * this constructor will have a null hashingStrategy and throw NullPointerException when used.
     */
    @SuppressWarnings("UnusedDeclaration")
    @Deprecated
    public UnifiedSetWithHashingStrategyMultimap()
    {
        // For Externalizable use only
    }

    public UnifiedSetWithHashingStrategyMultimap(HashingStrategy hashingStrategy)
    {
        this.hashingStrategy = hashingStrategy;
    }

    public UnifiedSetWithHashingStrategyMultimap(UnifiedSetWithHashingStrategyMultimap multimap)
    {
        this(multimap.hashingStrategy, multimap);
    }

    public UnifiedSetWithHashingStrategyMultimap(HashingStrategy hashingStrategy, Multimap multimap)
    {
        super(Math.max(multimap.sizeDistinct() * 2, 16));
        this.hashingStrategy = hashingStrategy;
        this.putAll(multimap);
    }

    public UnifiedSetWithHashingStrategyMultimap(HashingStrategy hashingStrategy, Pair... pairs)
    {
        this.hashingStrategy = hashingStrategy;
        this.putAllPairs(pairs);
    }

    public UnifiedSetWithHashingStrategyMultimap(HashingStrategy hashingStrategy, Iterable> inputIterable)
    {
        this.hashingStrategy = hashingStrategy;
        for (Pair single : inputIterable)
        {
            this.add(single);
        }
    }

    public static  UnifiedSetWithHashingStrategyMultimap newMultimap(UnifiedSetWithHashingStrategyMultimap multimap)
    {
        return new UnifiedSetWithHashingStrategyMultimap<>(multimap);
    }

    public static  UnifiedSetWithHashingStrategyMultimap newMultimap(
            HashingStrategy hashingStrategy,
            Multimap multimap)
    {
        return new UnifiedSetWithHashingStrategyMultimap<>(hashingStrategy, multimap);
    }

    public static  UnifiedSetWithHashingStrategyMultimap newMultimap(HashingStrategy hashingStrategy)
    {
        return new UnifiedSetWithHashingStrategyMultimap<>(hashingStrategy);
    }

    public static  UnifiedSetWithHashingStrategyMultimap newMultimap(HashingStrategy hashingStrategy, Pair... pairs)
    {
        return new UnifiedSetWithHashingStrategyMultimap<>(hashingStrategy, pairs);
    }

    public static  UnifiedSetWithHashingStrategyMultimap newMultimap(HashingStrategy hashingStrategy, Iterable> inputIterable)
    {
        return new UnifiedSetWithHashingStrategyMultimap<>(hashingStrategy, inputIterable);
    }

    @Override
    protected MutableMap> createMap()
    {
        return Maps.mutable.empty();
    }

    @Override
    protected MutableMap> createMapWithKeyCount(int keyCount)
    {
        return UnifiedMap.newMap(keyCount);
    }

    @Override
    protected UnifiedSetWithHashingStrategy createCollection()
    {
        return UnifiedSetWithHashingStrategy.newSet(this.hashingStrategy);
    }

    @Override
    public UnifiedSetWithHashingStrategyMultimap newEmpty()
    {
        return new UnifiedSetWithHashingStrategyMultimap<>(this.hashingStrategy);
    }

    public HashingStrategy getValueHashingStrategy()
    {
        return this.hashingStrategy;
    }

    @Override
    public void writeExternal(ObjectOutput out) throws IOException
    {
        out.writeObject(this.hashingStrategy);
        super.writeExternal(out);
    }

    @Override
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
    {
        this.hashingStrategy = (HashingStrategy) in.readObject();
        super.readExternal(in);
    }

    @Override
    public MutableSetMultimap flip()
    {
        return Iterate.flip(this);
    }

    @Override
    public UnifiedSetWithHashingStrategyMultimap selectKeysValues(Predicate2 predicate)
    {
        return this.selectKeysValues(predicate, this.newEmpty());
    }

    @Override
    public UnifiedSetWithHashingStrategyMultimap rejectKeysValues(Predicate2 predicate)
    {
        return this.rejectKeysValues(predicate, this.newEmpty());
    }

    @Override
    public UnifiedSetWithHashingStrategyMultimap selectKeysMultiValues(Predicate2> predicate)
    {
        return this.selectKeysMultiValues(predicate, this.newEmpty());
    }

    @Override
    public UnifiedSetWithHashingStrategyMultimap rejectKeysMultiValues(Predicate2> predicate)
    {
        return this.rejectKeysMultiValues(predicate, this.newEmpty());
    }
}