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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.parallel;
import java.util.Collection;
import org.eclipse.collections.api.bag.Bag;
import org.eclipse.collections.api.block.procedure.Procedure;
import org.eclipse.collections.api.factory.Lists;
import org.eclipse.collections.api.factory.Sets;
import org.eclipse.collections.api.list.ListIterable;
import org.eclipse.collections.api.map.MapIterable;
import org.eclipse.collections.api.set.SetIterable;
import org.eclipse.collections.api.set.sorted.SortedSetIterable;
import org.eclipse.collections.impl.bag.mutable.HashBag;
import org.eclipse.collections.impl.list.mutable.CompositeFastList;
import org.eclipse.collections.impl.set.sorted.mutable.TreeSortedSet;
import org.eclipse.collections.impl.utility.internal.DefaultSpeciesNewStrategy;
public abstract class AbstractPredicateBasedCombiner>
extends AbstractProcedureCombiner
{
private static final long serialVersionUID = 1L;
protected final Collection result;
protected AbstractPredicateBasedCombiner(
boolean useCombineOne,
Iterable> sourceCollection,
int initialCapacity,
Collection targetCollection)
{
super(useCombineOne);
this.result = this.initializeResult(sourceCollection, targetCollection, initialCapacity);
}
protected final Collection initializeResult(
Iterable> sourceCollection,
Collection targetCollection,
int initialCapacity)
{
if (targetCollection != null)
{
return targetCollection;
}
if (sourceCollection instanceof ListIterable)
{
return new CompositeFastList<>();
}
if (sourceCollection instanceof SortedSetIterable)
{
return TreeSortedSet.newSet(((SortedSetIterable) sourceCollection).comparator());
}
if (sourceCollection instanceof SetIterable)
{
this.setCombineOne(true);
return Sets.mutable.withInitialCapacity(initialCapacity);
}
if (sourceCollection instanceof Bag || sourceCollection instanceof MapIterable)
{
return HashBag.newBag();
}
return this.createResultForCollection(sourceCollection, initialCapacity);
}
private Collection createResultForCollection(Iterable> sourceCollection, int initialCapacity)
{
if (sourceCollection instanceof Collection)
{
return DefaultSpeciesNewStrategy.INSTANCE.speciesNew((Collection>) sourceCollection, initialCapacity);
}
return Lists.mutable.withInitialCapacity(initialCapacity);
}
public Collection getResult()
{
return this.result;
}
}