Merge pull request #39 from kris7t/partial-interpretation

Implement partial interpretation based model generation

1 files changed, 117 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/mailbox/timeless/BehaviorChangingMailbox.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/mailbox/timeless/BehaviorChangingMailbox.java
new file mode 100644
index 00000000..fe822d7c
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/mailbox/timeless/BehaviorChangingMailbox.java
@@ -0,0 +1,117 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2016, Tamas Szabo, Istvan Rath 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.rete.network.mailbox.timeless;
+
+import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
+import tools.refinery.viatra.runtime.matchers.util.Direction;
+import tools.refinery.viatra.runtime.rete.network.Node;
+import tools.refinery.viatra.runtime.rete.network.Receiver;
+import tools.refinery.viatra.runtime.rete.network.ReteContainer;
+import tools.refinery.viatra.runtime.rete.network.communication.CommunicationGroup;
+import tools.refinery.viatra.runtime.rete.network.communication.CommunicationTracker;
+import tools.refinery.viatra.runtime.rete.network.communication.MessageSelector;
+import tools.refinery.viatra.runtime.rete.network.communication.Timestamp;
+import tools.refinery.viatra.runtime.rete.network.communication.timeless.TimelessCommunicationTracker;
+import tools.refinery.viatra.runtime.rete.network.mailbox.AdaptableMailbox;
+import tools.refinery.viatra.runtime.rete.network.mailbox.FallThroughCapableMailbox;
+
+/**
+ * This mailbox changes its behavior based on the position of its {@link Receiver} in the network topology. 
+ * It either behaves as a {@link DefaultMailbox} or as an {@link UpdateSplittingMailbox}. The decision is made by the
+ * {@link CommunicationTracker}, see {@link TimelessCommunicationTracker#postProcessNode(Node)} for more details.
+ * 
+ * @author Tamas Szabo
+ */
+public class BehaviorChangingMailbox implements FallThroughCapableMailbox {
+
+    protected boolean fallThrough;
+    protected boolean split;
+    protected AdaptableMailbox wrapped;
+    protected final Receiver receiver;
+    protected final ReteContainer container;
+    protected CommunicationGroup group;
+
+    public BehaviorChangingMailbox(final Receiver receiver, final ReteContainer container) {
+        this.fallThrough = false;
+        this.split = false;
+        this.receiver = receiver;
+        this.container = container;
+        this.wrapped = new DefaultMailbox(receiver, container);
+        this.wrapped.setAdapter(this);
+    }
+
+    @Override
+    public void postMessage(final Direction direction, final Tuple update, final Timestamp timestamp) {
+        if (this.fallThrough && !this.container.isExecutingDelayedCommands()) {
+            // disable fall through while we are in the middle of executing delayed construction commands
+            this.receiver.update(direction, update, timestamp);
+        } else {
+            this.wrapped.postMessage(direction, update, timestamp);
+        }
+    }
+
+    @Override
+    public void deliverAll(final MessageSelector kind) {
+        this.wrapped.deliverAll(kind);
+    }
+
+    @Override
+    public String toString() {
+        return "A_MBOX -> " + this.wrapped;
+    }
+
+    public void setSplitFlag(final boolean splitValue) {
+        if (this.split != splitValue) {
+            assert isEmpty();
+            if (splitValue) {
+                this.wrapped = new UpdateSplittingMailbox(this.receiver, this.container);
+            } else {
+                this.wrapped = new DefaultMailbox(this.receiver, this.container);
+            }
+            this.wrapped.setAdapter(this);
+            this.split = splitValue;
+        }
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return this.wrapped.isEmpty();
+    }
+
+    @Override
+    public void clear() {
+        this.wrapped.clear();
+    }
+
+    @Override
+    public Receiver getReceiver() {
+        return this.receiver;
+    }
+    
+    @Override
+    public CommunicationGroup getCurrentGroup() {
+        return this.group;
+    }
+
+    @Override
+    public void setCurrentGroup(final CommunicationGroup group) {
+        this.group = group;
+    }
+
+    @Override
+    public boolean isFallThrough() {
+        return this.fallThrough;
+    }
+    
+    @Override
+    public void setFallThrough(final boolean fallThrough) {
+        this.fallThrough = fallThrough;
+    }
+    
+}
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