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/*******************************************************************************
* 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);
}
}
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