/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.optimizer.operators;
import java.util.Collections;
import java.util.List;
import org.apache.flink.api.common.operators.util.FieldList;
import org.apache.flink.optimizer.CompilerException;
import org.apache.flink.optimizer.dag.TwoInputNode;
import org.apache.flink.optimizer.dataproperties.LocalProperties;
import org.apache.flink.optimizer.dataproperties.RequestedLocalProperties;
import org.apache.flink.optimizer.plan.Channel;
import org.apache.flink.optimizer.plan.DualInputPlanNode;
import org.apache.flink.optimizer.util.Utils;
import org.apache.flink.runtime.operators.DriverStrategy;
/**
*
*/
public class CoGroupWithSolutionSetFirstDescriptor extends CoGroupDescriptor {
public CoGroupWithSolutionSetFirstDescriptor(FieldList keys1, FieldList keys2) {
super(keys1, keys2);
}
@Override
protected List<LocalPropertiesPair> createPossibleLocalProperties() {
RequestedLocalProperties none = new RequestedLocalProperties();
RequestedLocalProperties sort = new RequestedLocalProperties(Utils.createOrdering(this.keys2));
return Collections.singletonList(new LocalPropertiesPair(none, sort));
}
@Override
public DualInputPlanNode instantiate(Channel in1, Channel in2, TwoInputNode node) {
boolean[] inputOrders = in2.getLocalProperties().getOrdering() == null ? null : in2.getLocalProperties().getOrdering().getFieldSortDirections();
if (inputOrders == null || inputOrders.length < this.keys2.size()) {
throw new CompilerException("BUG: The input strategy does not sufficiently describe the sort orders for a CoGroup operator.");
} else if (inputOrders.length > this.keys2.size()) {
boolean[] tmp = new boolean[this.keys2.size()];
System.arraycopy(inputOrders, 0, tmp, 0, tmp.length);
inputOrders = tmp;
}
return new DualInputPlanNode(node, "CoGroup ("+node.getOperator().getName()+")", in1, in2, DriverStrategy.CO_GROUP, this.keys1, this.keys2, inputOrders);
}
@Override
public boolean areCoFulfilled(RequestedLocalProperties requested1, RequestedLocalProperties requested2,
LocalProperties produced1, LocalProperties produced2)
{
return true;
}
@Override
public LocalProperties computeLocalProperties(LocalProperties in1, LocalProperties in2) {
return in2;
}
}