| /* |
| * 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.phoenix.hive; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InvalidClassException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.ObjectStreamClass; |
| import java.io.OutputStream; |
| import java.io.Serializable; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| /** |
| * Wrapper around the primary key data for Hive. |
| */ |
| public class PrimaryKeyData implements Serializable{ |
| public static final PrimaryKeyData EMPTY = new PrimaryKeyData(Collections.<String,Object> emptyMap()); |
| private static final long serialVersionUID = 1L; |
| |
| // Based on https://www.ibm.com/developerworks/library/se-lookahead/. Prevents unexpected |
| // deserialization of other objects of an unexpected class. |
| private static class LookAheadObjectInputStream extends ObjectInputStream { |
| public LookAheadObjectInputStream(InputStream in) throws IOException { |
| super(in); |
| } |
| |
| @Override |
| protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException { |
| if (!desc.getName().equals(PrimaryKeyData.class.getName()) && |
| !desc.getName().startsWith("java.lang.") && |
| !desc.getName().startsWith("java.util.") && |
| !desc.getName().startsWith("java.sql.")) { |
| throw new InvalidClassException(desc.getName(), "Expected an instance of PrimaryKeyData"); |
| } |
| return super.resolveClass(desc); |
| } |
| } |
| |
| private final HashMap<String,Object> data; |
| |
| public PrimaryKeyData(Map<String,Object> data) { |
| if (data instanceof HashMap) { |
| this.data = (HashMap<String,Object>) data; |
| } else { |
| this.data = new HashMap<>(Objects.requireNonNull(data)); |
| } |
| } |
| |
| public HashMap<String,Object> getData() { |
| return data; |
| } |
| |
| public void serialize(OutputStream output) throws IOException { |
| try (ObjectOutputStream oos = new ObjectOutputStream(output)) { |
| oos.writeObject(this); |
| oos.flush(); |
| } |
| } |
| |
| public static PrimaryKeyData deserialize(InputStream input) throws IOException, ClassNotFoundException { |
| try (LookAheadObjectInputStream ois = new LookAheadObjectInputStream(input)) { |
| Object obj = ois.readObject(); |
| if (obj instanceof PrimaryKeyData) { |
| return (PrimaryKeyData) obj; |
| } |
| throw new InvalidClassException(obj == null ? "null" : obj.getClass().getName(), "Disallowed serialized class"); |
| } |
| } |
| } |