| /* |
| * 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.metadata; |
| |
| import org.apache.drill.common.types.TypeProtos; |
| import org.apache.drill.exec.record.MaterializedField; |
| |
| public class DictColumnMetadata extends AbstractMapColumnMetadata { |
| |
| /** |
| * Build a new dict column from the field provided |
| * |
| * @param schema materialized field description of the map |
| */ |
| public DictColumnMetadata(MaterializedField schema) { |
| this(schema, null); |
| } |
| |
| /** |
| * Build a dict column metadata by cloning the type information (but not |
| * the children) of the materialized field provided. |
| * |
| * @param schema the schema to use |
| * @param tupleSchema parent schema |
| */ |
| DictColumnMetadata(MaterializedField schema, TupleSchema tupleSchema) { |
| super(schema, tupleSchema); |
| } |
| |
| public DictColumnMetadata(DictColumnMetadata from) { |
| super(from); |
| } |
| |
| public DictColumnMetadata(String name, TypeProtos.DataMode mode, TupleSchema mapSchema) { |
| super(name, TypeProtos.MinorType.DICT, mode, mapSchema); |
| } |
| |
| @Override |
| public ColumnMetadata copy() { |
| return new DictColumnMetadata(this); |
| } |
| |
| @Override |
| public ColumnMetadata cloneEmpty() { |
| return new DictColumnMetadata(name, mode, new TupleSchema()); |
| } |
| |
| @Override |
| public boolean isDict() { |
| return true; |
| } |
| |
| @Override |
| protected String getStringType() { |
| return "MAP"; |
| } |
| |
| @Override |
| public StructureType structureType() { |
| return StructureType.DICT; |
| } |
| } |