| /* |
| * 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.vector.complex.impl; |
| |
| import org.apache.drill.exec.expr.holders.RepeatedMapHolder; |
| import org.apache.drill.exec.record.MaterializedField; |
| import org.apache.drill.exec.vector.complex.RepeatedMapVector; |
| import org.apache.drill.exec.vector.complex.reader.FieldReader; |
| import org.apache.drill.exec.vector.complex.writer.BaseWriter.MapWriter; |
| |
| @SuppressWarnings("unused") |
| public class RepeatedMapReaderImpl extends AbstractRepeatedMapReaderImpl<RepeatedMapVector> { |
| |
| public RepeatedMapReaderImpl(RepeatedMapVector vector) { |
| super(vector); |
| } |
| |
| @Override |
| public FieldReader reader() { |
| if (isEmpty()) { |
| return NullReader.INSTANCE; |
| } |
| |
| setChildrenPosition(currentOffset); |
| return new SingleLikeRepeatedMapReaderImpl(vector, this); |
| } |
| |
| public void setSinglePosition(int index, int childIndex) { |
| super.setPosition(index); |
| RepeatedMapHolder h = new RepeatedMapHolder(); |
| vector.getAccessor().get(index, h); |
| if (h.start == h.end) { |
| currentOffset = NO_VALUES; |
| } else { |
| int singleOffset = h.start + childIndex; |
| assert singleOffset < h.end; |
| currentOffset = singleOffset; |
| maxOffset = singleOffset + 1; |
| setChildrenPosition(singleOffset); |
| } |
| } |
| |
| @Override |
| public MaterializedField getField() { |
| return vector.getField(); |
| } |
| |
| @Override |
| public void copyAsValue(MapWriter writer) { |
| if (isEmpty()) { |
| return; |
| } |
| RepeatedMapWriter impl = (RepeatedMapWriter) writer; |
| impl.container.copyFromSafe(idx(), impl.idx(), vector); |
| } |
| |
| public void copyAsValueSingle(MapWriter writer) { |
| if (isEmpty()) { |
| return; |
| } |
| SingleMapWriter impl = (SingleMapWriter) writer; |
| impl.container.copyFromSafe(currentOffset, impl.idx(), vector); |
| } |
| |
| @Override |
| public void copyAsField(String name, MapWriter writer) { |
| if (isEmpty()) { |
| return; |
| } |
| RepeatedMapWriter impl = (RepeatedMapWriter) writer.map(name); |
| impl.container.copyFromSafe(idx(), impl.idx(), vector); |
| } |
| } |