1 files changed, 108 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/memories/timely/TimelyNullaryMaskedTupleMemory.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/memories/timely/TimelyNullaryMaskedTupleMemory.java
new file mode 100644
index 00000000..75987a89
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/memories/timely/TimelyNullaryMaskedTupleMemory.java
@@ -0,0 +1,108 @@
+/*******************************************************************************
+ * 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));
+    }
+
+}