| /** |
| * 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.tajo.type; |
| |
| import org.apache.tajo.schema.Field; |
| |
| public abstract class TypeVisitor { |
| public void visit(Type type) { |
| switch (type.kind) { |
| case ARRAY: |
| visitArray((Array) type); |
| break; |
| case RECORD: |
| visitRecord((Record) type); |
| break; |
| case MAP: |
| visitMap((Map) type); |
| break; |
| default: |
| visitPrimitive(type); |
| } |
| } |
| |
| void visitPrimitive(Type type) {} |
| |
| void visitMap(Map map) { |
| visit(map.keyType()); |
| visit(map.valueType()); |
| } |
| void visitArray(Array array) { |
| visit(array.elementType()); |
| } |
| void visitRecord(Record record) { |
| for (Field field : record.fields()) { |
| visit(field.type()); |
| } |
| } |
| } |