1 files changed, 133 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/memories/timely/TimelyUnaryMaskedTupleMemory.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/memories/timely/TimelyUnaryMaskedTupleMemory.java
new file mode 100644
index 00000000..178193af
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/memories/timely/TimelyUnaryMaskedTupleMemory.java
@@ -0,0 +1,133 @@
+/*******************************************************************************
+ * 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.Iterator;
+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.CollectionsFactory;
+import tools.refinery.viatra.runtime.matchers.util.TimelyMemory;
+import tools.refinery.viatra.runtime.matchers.util.timeline.Diff;
+import tools.refinery.viatra.runtime.matchers.util.timeline.Timeline;
+
+/**
+ * Timely specialization for unary mask. 
+ * 
+ * @author Tamas Szabo
+ * @since 2.3
+ */
+public final class TimelyUnaryMaskedTupleMemory<Timestamp extends Comparable<Timestamp>>
+        extends AbstractTimelyMaskedMemory<Timestamp, Object> {
+
+    protected final int keyPosition;
+
+    public TimelyUnaryMaskedTupleMemory(final TupleMask mask, final Object owner, final boolean isLazy) {
+        super(mask, owner, isLazy);
+        if (1 != mask.getSize())
+            throw new IllegalArgumentException(mask.toString());
+        this.keyPosition = mask.indices[0];
+    }
+
+    @Override
+    public Iterable<Tuple> getSignatures() {
+        return () -> {
+            final Iterator<Object> wrapped = this.memoryMap.keySet().iterator();
+            return new Iterator<Tuple>() {
+                @Override
+                public boolean hasNext() {
+                    return wrapped.hasNext();
+                }
+
+                @Override
+                public Tuple next() {
+                    final Object key = wrapped.next();
+                    return Tuples.staticArityFlatTupleOf(key);
+                }
+            };
+        };
+    }
+
+    @Override
+    public Diff<Timestamp> removeWithTimestamp(final Tuple tuple, final Tuple signature, final Timestamp timestamp) {
+        final Object key = tuple.get(keyPosition);
+        return removeInternal(key, tuple, timestamp);
+    }
+
+    @Override
+    public Diff<Timestamp> addWithTimestamp(final Tuple tuple, final Tuple signature, final Timestamp timestamp) {
+        final Object key = tuple.get(keyPosition);
+        return addInternal(key, tuple, timestamp);
+    }
+
+    @Override
+    public Collection<Tuple> get(final ITuple signature) {
+        return getInternal(signature.get(0));
+    }
+
+    @Override
+    public Map<Tuple, Timeline<Timestamp>> getWithTimeline(final ITuple signature) {
+        return getWithTimestampInternal(signature.get(0));
+    }
+
+    @Override
+    public boolean isPresentAtInfinity(ITuple signature) {
+        return isPresentAtInfinityInteral(signature.get(0));
+    }
+
+    @Override
+    public Iterable<Tuple> getResumableSignatures() {
+        if (this.foldingStates == null || this.foldingStates.isEmpty()) {
+            return Collections.emptySet();
+        } else {
+            return () -> {
+                final Iterator<Object> wrapped = this.foldingStates.firstEntry().getValue().iterator();
+                return new Iterator<Tuple>() {
+                    @Override
+                    public boolean hasNext() {
+                        return wrapped.hasNext();
+                    }
+
+                    @Override
+                    public Tuple next() {
+                        final Object key = wrapped.next();
+                        return Tuples.staticArityFlatTupleOf(key);
+                    }
+                };
+            };
+        }
+    }
+
+    @Override
+    public Map<Tuple, Map<Tuple, Diff<Timestamp>>> resumeAt(final Timestamp timestamp) {
+        final Map<Tuple, Map<Tuple, Diff<Timestamp>>> result = CollectionsFactory.createMap();
+        final Timestamp resumableTimestamp = this.getResumableTimestamp();
+        if (resumableTimestamp == null) {
+            throw new IllegalStateException("There is nothing to fold!");
+        } else if (resumableTimestamp.compareTo(timestamp) != 0) {
+            throw new IllegalStateException("Expected to continue folding at " + resumableTimestamp + "!");
+        }
+        
+        final Set<Object> signatures = this.foldingStates.remove(timestamp);
+        for (final Object signature : signatures) {
+            final TimelyMemory<Timestamp> memory = this.memoryMap.get(signature);
+            final Map<Tuple, Diff<Timestamp>> diffMap = memory.resumeAt(resumableTimestamp);
+            result.put(Tuples.staticArityFlatTupleOf(signature), diffMap);
+            registerFoldingState(memory.getResumableTimestamp(), signature);
+        }
+        return result;
+    }
+
+}