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/*******************************************************************************
* Copyright (c) 2004-2008 Gabor Bergmann and Daniel Varro
* 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.memories;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import tools.refinery.viatra.runtime.matchers.tuple.ITuple;
import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
import tools.refinery.viatra.runtime.matchers.tuple.TupleMask;
import tools.refinery.viatra.runtime.matchers.util.CollectionsFactory;
import tools.refinery.viatra.runtime.matchers.util.CollectionsFactory.MemoryType;
import tools.refinery.viatra.runtime.matchers.util.IMemoryView;
import tools.refinery.viatra.runtime.matchers.util.IMultiLookup;
import tools.refinery.viatra.runtime.matchers.util.IMultiLookup.ChangeGranularity;
import tools.refinery.viatra.runtime.matchers.util.timeline.Timeline;
/**
* @author Gabor Bergmann
*
* Default implementation that covers all cases.
*
* @since 2.0
*/
public final class DefaultMaskedTupleMemory<Timestamp extends Comparable<Timestamp>>
extends MaskedTupleMemory<Timestamp> {
/**
* Maps a signature tuple to the bucket of tuples with the given signature.
*
* @since 2.0
*/
protected IMultiLookup<Tuple, Tuple> signatureToTuples;
/**
* @param mask
* The mask used to index the matchings
* @param owner
* the object "owning" this memory
* @param bucketType
* the kind of tuple collection maintained for each indexer bucket
* @since 2.0
*/
public DefaultMaskedTupleMemory(TupleMask mask, MemoryType bucketType, Object owner) {
super(mask, owner);
signatureToTuples = CollectionsFactory.<Tuple, Tuple> createMultiLookup(Object.class, bucketType, Object.class);
}
@Override
public boolean add(Tuple tuple) {
Tuple signature = mask.transform(tuple);
return add(tuple, signature);
}
@Override
public boolean add(Tuple tuple, Tuple signature) {
try {
return signatureToTuples.addPair(signature, tuple) == ChangeGranularity.KEY;
} catch (IllegalStateException ex) { // ignore worthless internal exception details
throw raiseDuplicateInsertion(tuple);
}
}
@Override
public boolean remove(Tuple tuple) {
Tuple signature = mask.transform(tuple);
return remove(tuple, signature);
}
@Override
public boolean remove(Tuple tuple, Tuple signature) {
try {
return signatureToTuples.removePair(signature, tuple) == ChangeGranularity.KEY;
} catch (IllegalStateException ex) { // ignore worthless internal exception details
throw raiseDuplicateDeletion(tuple);
}
}
@Override
public Map<Tuple, Timeline<Timestamp>> getWithTimeline(ITuple signature) {
throw new UnsupportedOperationException("Timeless memories do not support timestamp-based lookup!");
}
@Override
public Collection<Tuple> get(ITuple signature) {
IMemoryView<Tuple> bucket = signatureToTuples.lookupUnsafe(signature);
return bucket == null ? null : bucket.distinctValues();
}
@Override
public void clear() {
signatureToTuples.clear();
}
@Override
public Iterable<Tuple> getSignatures() {
return signatureToTuples.distinctKeys();
}
@Override
public Iterator<Tuple> iterator() {
return signatureToTuples.distinctValues().iterator();
}
@Override
public int getTotalSize() {
int i = 0;
for (Tuple key : signatureToTuples.distinctKeys()) {
i += signatureToTuples.lookup(key).size();
}
return i;
}
@Override
public int getKeysetSize() {
return signatureToTuples.countKeys();
}
}
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