| /** |
| * 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.hcatalog.utils; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| public class Util { |
| |
| static Map<String, Class<?>> typeMap = new HashMap<String, Class<?>>(); |
| |
| static { |
| typeMap.put("tinyint", Byte.class); |
| typeMap.put("smallint", Short.class); |
| typeMap.put("int", Integer.class); |
| typeMap.put("bigint", Long.class); |
| typeMap.put("float", Float.class); |
| typeMap.put("double", Double.class); |
| typeMap.put("string", String.class); |
| typeMap.put("boolean", Boolean.class); |
| typeMap.put("struct<num:int,str:string,dbl:double>", List.class); |
| typeMap.put("map<string,string>", Map.class); |
| typeMap.put("array<map<string,string>>", List.class); |
| } |
| |
| public static void die(String expectedType, Object o) throws IOException { |
| throw new IOException("Expected " + expectedType + ", got " + |
| o.getClass().getName()); |
| } |
| |
| |
| public static String check(String type, Object o) throws IOException { |
| if (o == null) { |
| return "null"; |
| } |
| if (check(typeMap.get(type), o)) { |
| if (type.equals("map<string,string>")) { |
| Map<String, String> m = (Map<String, String>) o; |
| check(m); |
| } else if (type.equals("array<map<string,string>>")) { |
| List<Map<String, String>> listOfMaps = (List<Map<String, String>>) o; |
| for (Map<String, String> m : listOfMaps) { |
| check(m); |
| } |
| } else if (type.equals("struct<num:int,str:string,dbl:double>")) { |
| List<Object> l = (List<Object>) o; |
| if (!check(Integer.class, l.get(0)) || |
| !check(String.class, l.get(1)) || |
| !check(Double.class, l.get(2))) { |
| die("struct<num:int,str:string,dbl:double>", l); |
| } |
| } |
| } else { |
| die(typeMap.get(type).getName(), o); |
| } |
| return o.toString(); |
| } |
| |
| /** |
| * @param m |
| * @throws IOException |
| */ |
| public static void check(Map<String, String> m) throws IOException { |
| if (m == null) { |
| return; |
| } |
| for (Entry<String, String> e : m.entrySet()) { |
| // just access key and value to ensure they are correct |
| if (!check(String.class, e.getKey())) { |
| die("String", e.getKey()); |
| } |
| if (!check(String.class, e.getValue())) { |
| die("String", e.getValue()); |
| } |
| } |
| |
| } |
| |
| public static boolean check(Class<?> expected, Object actual) { |
| if (actual == null) { |
| return true; |
| } |
| return expected.isAssignableFrom(actual.getClass()); |
| } |
| |
| } |