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/*******************************************************************************
* Copyright (c) 2010-2018, Gabor Bergmann, IncQuery Labs 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.memories.timely;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
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.tuple.Tuples;
import tools.refinery.viatra.runtime.matchers.util.timeline.Diff;
import tools.refinery.viatra.runtime.matchers.util.timeline.Timeline;
/**
* Timely specialization for nullary mask.
*
* @author Tamas Szabo
* @since 2.3
*/
public final class TimelyNullaryMaskedTupleMemory<Timestamp extends Comparable<Timestamp>>
extends AbstractTimelyTrivialMaskedMemory<Timestamp> {
protected static final Tuple EMPTY_TUPLE = Tuples.staticArityFlatTupleOf();
protected static final Set<Tuple> UNIT_RELATION = Collections.singleton(EMPTY_TUPLE);
protected static final Set<Tuple> EMPTY_RELATION = Collections.emptySet();
public TimelyNullaryMaskedTupleMemory(final TupleMask mask, final Object owner, final boolean isLazy) {
super(mask, owner, isLazy);
if (0 != mask.getSize()) {
throw new IllegalArgumentException(mask.toString());
}
}
@Override
public int getKeysetSize() {
return this.memory.isEmpty() ? 0 : 1;
}
@Override
public Iterable<Tuple> getSignatures() {
return this.memory.isEmpty() ? EMPTY_RELATION : UNIT_RELATION;
}
@Override
public Collection<Tuple> get(final ITuple signature) {
if (0 == signature.getSize()) {
return this.memory.getTuplesAtInfinity();
} else {
return null;
}
}
@Override
public Map<Tuple, Timeline<Timestamp>> getWithTimeline(final ITuple signature) {
if (0 == signature.getSize()) {
return this.memory.asMap();
} else {
return null;
}
}
@Override
public Diff<Timestamp> removeWithTimestamp(final Tuple tuple, final Tuple signature, final Timestamp timestamp) {
try {
return this.memory.remove(tuple, timestamp);
} catch (final IllegalStateException e) {
throw raiseDuplicateDeletion(tuple);
}
}
@Override
public Diff<Timestamp> addWithTimestamp(final Tuple tuple, final Tuple signature, final Timestamp timestamp) {
return this.memory.put(tuple, timestamp);
}
@Override
public boolean isPresentAtInfinity(final ITuple signature) {
if (0 == signature.getSize()) {
return this.memory.getCountAtInfinity() > 0;
} else {
return false;
}
}
@Override
public Set<Tuple> getResumableSignatures() {
if (this.memory.getResumableTimestamp() != null) {
return UNIT_RELATION;
} else {
return EMPTY_RELATION;
}
}
@Override
public Map<Tuple, Map<Tuple, Diff<Timestamp>>> resumeAt(final Timestamp timestamp) {
return Collections.singletonMap(EMPTY_TUPLE, this.memory.resumeAt(timestamp));
}
}
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