1 files changed, 85 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/single/DiscriminatorBucketNode.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/single/DiscriminatorBucketNode.java
new file mode 100644
index 00000000..803bab20
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/single/DiscriminatorBucketNode.java
@@ -0,0 +1,85 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2016, Gabor Bergmann, IncQueryLabs 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.rete.single;
+
+import java.util.Collection;
+import java.util.Map;
+
+import tools.refinery.viatra.runtime.matchers.context.IQueryRuntimeContext;
+import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
+import tools.refinery.viatra.runtime.matchers.util.Direction;
+import tools.refinery.viatra.runtime.matchers.util.timeline.Timeline;
+import tools.refinery.viatra.runtime.rete.network.ReteContainer;
+import tools.refinery.viatra.runtime.rete.network.Supplier;
+import tools.refinery.viatra.runtime.rete.network.communication.Timestamp;
+
+/**
+ * A bucket holds a filtered set of tuples of its parent {@link DiscriminatorDispatcherNode}. 
+ * Exactly those that have the given bucket key at their discrimination column.
+ * 
+ * <p> During operation, tuple contents and bucket keys have already been wrapped using {@link IQueryRuntimeContext#wrapElement(Object)}
+ * 
+ * @author Gabor Bergmann
+ * @since 1.5
+ */
+public class DiscriminatorBucketNode extends SingleInputNode {
+
+    private Object bucketKey;
+
+    /**
+     * @param bucketKey will be wrapped using {@link IQueryRuntimeContext#wrapElement(Object)}
+
+     */
+    public DiscriminatorBucketNode(ReteContainer reteContainer, Object bucketKey) {
+        super(reteContainer);
+        this.bucketKey = reteContainer.getNetwork().getEngine().getRuntimeContext().wrapElement(bucketKey);
+    }
+
+    @Override
+    public void pullInto(final Collection<Tuple> collector, final boolean flush) {
+       if (parent != null) {
+           getDispatcher().pullIntoFiltered(collector, bucketKey, flush);
+       }
+    }
+    
+    @Override
+    public void pullIntoWithTimeline(final Map<Tuple, Timeline<Timestamp>> collector, final boolean flush) {
+        if (parent != null) {
+            getDispatcher().pullIntoWithTimestampFiltered(collector, bucketKey, flush);
+        }
+    }
+
+    @Override
+    public void update(Direction direction, Tuple updateElement, Timestamp timestamp) {
+        propagateUpdate(direction, updateElement, timestamp);
+    }
+
+    public Object getBucketKey() {
+        return bucketKey;
+    }
+    
+    @Override
+    public void appendParent(Supplier supplier) {
+        if (! (supplier instanceof DiscriminatorDispatcherNode))
+            throw new IllegalArgumentException();
+        super.appendParent(supplier);
+    }
+    
+    public DiscriminatorDispatcherNode getDispatcher() {
+        return (DiscriminatorDispatcherNode) parent;
+    }
+    
+    @Override
+    protected String toStringCore() {
+        return String.format("%s<%s=='%s'>", 
+                super.toStringCore(), 
+                (getDispatcher() == null) ? "?" : getDispatcher().getDiscriminationColumnIndex(), 
+                bucketKey);
+    }
+}