| /* |
| * 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.Iterator; |
| |
| import org.apache.drill.common.types.TypeProtos.MajorType; |
| import org.apache.drill.common.types.TypeProtos.MinorType; |
| import org.apache.drill.common.types.Types; |
| import org.apache.drill.exec.expr.holders.UnionHolder; |
| import org.apache.drill.exec.record.MaterializedField; |
| import org.apache.drill.exec.vector.UntypedNullHolder; |
| import org.apache.drill.exec.vector.complex.reader.FieldReader; |
| import org.apache.drill.exec.vector.complex.writer.BaseWriter.ListWriter; |
| import org.apache.drill.exec.vector.complex.writer.FieldWriter; |
| |
| |
| abstract class AbstractBaseReader implements FieldReader { |
| |
| private int index; |
| |
| @Override |
| public void setPosition(int index) { this.index = index; } |
| |
| int idx() { return index; } |
| |
| @Override |
| public void reset() { index = 0; } |
| |
| @Override |
| public Iterator<String> iterator() { |
| throw new IllegalStateException("The current reader doesn't support reading as a map."); |
| } |
| |
| @Override |
| public MajorType getType() { |
| throw new IllegalStateException("The current reader doesn't support getting type information."); |
| } |
| |
| @Override |
| public MinorType getVectorType() { return getType().getMinorType(); } |
| |
| @Override |
| public MaterializedField getField() { |
| return MaterializedField.create("unknown", Types.LATE_BIND_TYPE); |
| } |
| |
| @Override |
| public boolean next() { |
| throw new IllegalStateException("The current reader doesn't support getting next information."); |
| } |
| |
| @Override |
| public int size() { |
| throw new IllegalStateException("The current reader doesn't support getting size information."); |
| } |
| |
| @Override |
| public void read(UnionHolder holder) { |
| holder.reader = this; |
| holder.isSet = this.isSet() ? 1 : 0; |
| } |
| |
| @Override |
| public void read(int index, UnionHolder holder) { |
| throw new IllegalStateException("The current reader doesn't support reading union type"); |
| } |
| |
| @Override |
| public void read(UntypedNullHolder holder) { |
| throw new IllegalStateException("The current reader doesn't support reading untyped null"); |
| } |
| |
| @Override |
| public void read(int index, UntypedNullHolder holder) { |
| throw new IllegalStateException("The current reader doesn't support reading untyped null"); |
| } |
| |
| @Override |
| public void copyAsValue(UnionWriter writer) { |
| throw new IllegalStateException("The current reader doesn't support reading union type"); |
| } |
| |
| @Override |
| public void copyAsValue(ListWriter writer) { |
| ComplexCopier.copy(this, (FieldWriter)writer); |
| } |
| |
| @Override |
| public String getTypeString() { |
| return getType().getMinorType().name(); |
| } |
| } |