/
AbstractMutableBagMultimap.java
executable file
·128 lines (111 loc) · 4.36 KB
/
AbstractMutableBagMultimap.java
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/*
* Copyright (c) 2016 Goldman Sachs.
* 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.bag;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import org.eclipse.collections.api.bag.ImmutableBag;
import org.eclipse.collections.api.bag.MutableBag;
import org.eclipse.collections.api.block.function.Function2;
import org.eclipse.collections.api.map.MutableMap;
import org.eclipse.collections.api.multimap.bag.ImmutableBagMultimap;
import org.eclipse.collections.api.multimap.bag.MutableBagMultimap;
import org.eclipse.collections.api.tuple.Pair;
import org.eclipse.collections.impl.block.procedure.checked.CheckedObjectIntProcedure;
import org.eclipse.collections.impl.block.procedure.checked.CheckedProcedure2;
import org.eclipse.collections.impl.multimap.AbstractMutableMultimap;
public abstract class AbstractMutableBagMultimap<K, V> extends AbstractMutableMultimap<K, V, MutableBag<V>> implements MutableBagMultimap<K, V>
{
protected AbstractMutableBagMultimap()
{
}
protected AbstractMutableBagMultimap(Pair<K, V>... pairs)
{
super(pairs);
}
protected AbstractMutableBagMultimap(Iterable<Pair<K, V>> inputIterable)
{
super(inputIterable);
}
protected AbstractMutableBagMultimap(int size)
{
super(size);
}
public MutableBagMultimap<K, V> toMutable()
{
MutableBagMultimap<K, V> mutableBagMultimap = this.newEmpty();
mutableBagMultimap.putAll(this);
return mutableBagMultimap;
}
public ImmutableBagMultimap<K, V> toImmutable()
{
final MutableMap<K, ImmutableBag<V>> result = (MutableMap<K, ImmutableBag<V>>) (MutableMap<?, ?>) this.createMapWithKeyCount(this.map.size());
this.map.forEachKeyValue((key, bag) -> result.put(key, bag.toImmutable()));
return new ImmutableBagMultimapImpl<K, V>(result);
}
public <K2, V2> HashBagMultimap<K2, V2> collectKeysValues(Function2<? super K, ? super V, Pair<K2, V2>> function)
{
return this.collectKeysValues(function, HashBagMultimap.<K2, V2>newMultimap());
}
@Override
public void writeExternal(final ObjectOutput out) throws IOException
{
int keysCount = this.map.size();
out.writeInt(keysCount);
this.map.forEachKeyValue(new CheckedProcedure2<K, MutableBag<V>>()
{
public void safeValue(K key, MutableBag<V> bag) throws IOException
{
out.writeObject(key);
out.writeInt(bag.sizeDistinct());
bag.forEachWithOccurrences(new CheckedObjectIntProcedure<V>()
{
public void safeValue(V value, int count) throws IOException
{
out.writeObject(value);
out.writeInt(count);
}
});
}
});
}
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
{
int keyCount = in.readInt();
this.map = this.createMapWithKeyCount(keyCount);
for (int i = 0; i < keyCount; i++)
{
K key = (K) in.readObject();
int valuesSize = in.readInt();
MutableBag<V> bag = this.createCollection();
for (int j = 0; j < valuesSize; j++)
{
V value = (V) in.readObject();
int count = in.readInt();
bag.addOccurrences(value, count);
}
this.putAll(key, bag);
}
}
public void putOccurrences(K key, V value, int occurrences)
{
if (occurrences < 0)
{
throw new IllegalArgumentException("Cannot add a negative number of occurrences");
}
if (occurrences > 0)
{
MutableBag<V> bag = this.map.getIfAbsentPutWith(key, this.createCollectionBlock(), this);
bag.addOccurrences(value, occurrences);
this.addToTotalSize(occurrences);
}
}
}