| /* |
| * 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 java.util.Map; |
| |
| import org.apache.drill.common.types.TypeProtos.MajorType; |
| import org.apache.drill.exec.record.MaterializedField; |
| import org.apache.drill.exec.vector.ValueVector; |
| import org.apache.drill.exec.vector.complex.MapVector; |
| import org.apache.drill.exec.vector.complex.reader.FieldReader; |
| import org.apache.drill.exec.vector.complex.writer.BaseWriter.MapWriter; |
| |
| import com.google.common.collect.Maps; |
| |
| @SuppressWarnings("unused") |
| public class SingleMapReaderImpl extends AbstractFieldReader { |
| |
| private final MapVector vector; |
| private final Map<String, FieldReader> fields = Maps.newHashMap(); |
| |
| public SingleMapReaderImpl(MapVector vector) { |
| this.vector = vector; |
| } |
| |
| private void setChildrenPosition(int index){ |
| for(FieldReader r : fields.values()){ |
| r.setPosition(index); |
| } |
| } |
| |
| @Override |
| public FieldReader reader(String name){ |
| FieldReader reader = fields.get(name); |
| if(reader == null){ |
| ValueVector child = vector.getChild(name); |
| if(child == null){ |
| reader = NullReader.INSTANCE; |
| }else{ |
| reader = child.getReader(); |
| } |
| fields.put(name, reader); |
| reader.setPosition(idx()); |
| } |
| return reader; |
| } |
| |
| @Override |
| public void setPosition(int index){ |
| super.setPosition(index); |
| for(FieldReader r : fields.values()){ |
| r.setPosition(index); |
| } |
| } |
| |
| @Override |
| public Object readObject() { |
| return vector.getAccessor().getObject(idx()); |
| } |
| |
| @Override |
| public boolean isSet() { |
| return true; |
| } |
| |
| @Override |
| public MajorType getType(){ |
| return vector.getField().getType(); |
| } |
| |
| @Override |
| public MaterializedField getField() { |
| return vector.getField(); |
| } |
| |
| @Override |
| public java.util.Iterator<String> iterator(){ |
| return vector.fieldNameIterator(); |
| } |
| |
| @Override |
| public void copyAsValue(MapWriter writer){ |
| SingleMapWriter impl = (SingleMapWriter) writer; |
| impl.container.copyFromSafe(idx(), impl.idx(), vector); |
| } |
| |
| @Override |
| public void copyAsField(String name, MapWriter writer){ |
| SingleMapWriter impl = (SingleMapWriter) writer.map(name); |
| impl.container.copyFromSafe(idx(), impl.idx(), vector); |
| } |
| } |
| |