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/*******************************************************************************
* Copyright (c) 2010-2017, Gabor Bergmann, IncQueryLabs Ltd.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.matchers.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import org.eclipse.collections.api.map.MutableMap;
import org.eclipse.collections.impl.factory.Maps;
import org.eclipse.collections.impl.factory.Sets;
import tools.refinery.viatra.runtime.matchers.util.CollectionsFactory.ICollectionsFramework;
import tools.refinery.viatra.runtime.matchers.util.CollectionsFactory.MemoryType;
/**
* @author Gabor Bergmann
* @since 1.7
* @noreference This class is not intended to be referenced by clients.
*/
public class EclipseCollectionsFactory implements ICollectionsFramework {
@Override
public <K, V> Map<K, V> createMap() {
return Maps.mutable.empty();
}
@Override
public <K, V> Map<K, V> createMap(Map<K, V> initial) {
MutableMap<K, V> result = Maps.mutable.ofInitialCapacity(initial.size());
result.putAll(initial);
return result;
}
@Override
public <K, V> TreeMap<K, V> createTreeMap() {
// eclipse collections is doing the same
return new TreeMap<>();
}
@Override
public <E> Set<E> createSet() {
return Sets.mutable.empty();
}
@Override
public <E> Set<E> createSet(Collection<E> initial) {
return Sets.mutable.ofAll(initial);
}
@Override
public <T> IMultiset<T> createMultiset() {
return new EclipseCollectionsMultiset<T>();
}
@Override
public <T> IDeltaBag<T> createDeltaBag() {
return new EclipseCollectionsDeltaBag<T>();
}
@Override
public <O> List<O> createObserverList() {
return new ArrayList<O>(1); // keep concurrent modification exceptions for error detection
// Lists.mutable.empty
}
@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public <K, V> IMultiLookup<K, V> createMultiLookup(
Class<? super K> fromKeys,
MemoryType toBuckets,
Class<? super V> ofValues)
{
boolean longKeys = Long.class.equals(fromKeys);
boolean objectKeys = Object.class.equals(fromKeys);
if (! (longKeys || objectKeys)) throw new IllegalArgumentException(fromKeys.getName());
boolean longValues = Long.class.equals(ofValues);
boolean objectValues = Object.class.equals(ofValues);
if (! (longValues || objectValues)) throw new IllegalArgumentException(ofValues.getName());
if (longKeys) { // K == java.lang.Long
if (longValues) { // V == java.lang.Long
switch(toBuckets) {
case MULTISETS:
return (IMultiLookup<K, V>) new EclipseCollectionsMultiLookup.FromLongs.ToMultisets.OfLongs();
case SETS:
return (IMultiLookup<K, V>) new EclipseCollectionsMultiLookup.FromLongs.ToSets.OfLongs();
default:
throw new IllegalArgumentException(toBuckets.toString());
}
} else { // objectValues
switch(toBuckets) {
case MULTISETS:
return new EclipseCollectionsMultiLookup.FromLongs.ToMultisets.OfObjects();
case SETS:
return new EclipseCollectionsMultiLookup.FromLongs.ToSets.OfObjects();
default:
throw new IllegalArgumentException(toBuckets.toString());
}
}
} else { // objectKeys
if (longValues) { // V == java.lang.Long
switch(toBuckets) {
case MULTISETS:
return new EclipseCollectionsMultiLookup.FromObjects.ToMultisets.OfLongs();
case SETS:
return new EclipseCollectionsMultiLookup.FromObjects.ToSets.OfLongs();
default:
throw new IllegalArgumentException(toBuckets.toString());
}
} else { // objectValues
switch(toBuckets) {
case MULTISETS:
return new EclipseCollectionsMultiLookup.FromObjects.ToMultisets.OfObjects();
case SETS:
return new EclipseCollectionsMultiLookup.FromObjects.ToSets.OfObjects();
default:
throw new IllegalArgumentException(toBuckets.toString());
}
}
}
}
@Override
@SuppressWarnings("unchecked")
public <T> IMemory<T> createMemory(Class<? super T> values, MemoryType memoryType) {
if (Long.class.equals(values)) { // T == java.lang.Long
switch(memoryType) {
case MULTISETS:
return (IMemory<T>) new EclipseCollectionsLongMultiset();
case SETS:
return (IMemory<T>) new EclipseCollectionsLongSetMemory();
default:
throw new IllegalArgumentException(memoryType.toString());
}
} else { // objectValues
switch(memoryType) {
case MULTISETS:
return new EclipseCollectionsMultiset<>();
case SETS:
return new EclipseCollectionsSetMemory<>();
default:
throw new IllegalArgumentException(memoryType.toString());
}
}
}
}
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