| /* |
| * 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 incoming record batch is |
| * known at the time of creation |
| * |
| * @param <T> |
| */ |
| public abstract class AbstractSingleRecordBatch<T extends PhysicalOperator> extends AbstractUnaryRecordBatch<T> { |
| |
| 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; |
| } |
| } |