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/*
* 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.drill.exec.record;
import org.apache.drill.exec.exception.OutOfMemoryException;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.physical.base.PhysicalOperator;
/**
* Implements an AbstractUnaryRecordBatch where the inoming record batch is known at the time of creation
* @param <T>
*/
public abstract class AbstractSingleRecordBatch<T extends PhysicalOperator> extends AbstractUnaryRecordBatch<T> {
private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(new Object() {}.getClass().getEnclosingClass());
protected final RecordBatch incoming;
public AbstractSingleRecordBatch(T popConfig, FragmentContext context, RecordBatch incoming) throws OutOfMemoryException {
super(popConfig, context);
this.incoming = incoming;
}
@Override
protected RecordBatch getIncoming() {
return incoming;
}
/**
* Based on lastKnownOutcome and if there are more records to be output for current record boundary detected by
* EMIT outcome, this method returns EMIT or OK outcome.
* @param hasMoreRecordInBoundary
* @return - EMIT - If the lastknownOutcome was EMIT and output records corresponding to all the incoming records in
* current record boundary is already produced.
* - OK - otherwise
*/
protected IterOutcome getFinalOutcome(boolean hasMoreRecordInBoundary) {
final IterOutcome lastOutcome = getLastKnownOutcome();
final boolean isLastOutcomeEmit = (IterOutcome.EMIT == lastOutcome);
if (isLastOutcomeEmit && !hasMoreRecordInBoundary) {
setLastKnownOutcome(IterOutcome.OK);
return IterOutcome.EMIT;
}
return IterOutcome.OK;
}
}
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