| /* |
| * 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.accumulo.test.util; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.OutputStream; |
| import java.io.Serializable; |
| import java.util.Base64; |
| import java.util.Objects; |
| |
| import org.apache.hadoop.io.Writable; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Partially based from {@link org.apache.commons.lang3.SerializationUtils}. |
| * |
| * <p> |
| * For serializing and de-serializing objects. |
| */ |
| public class SerializationUtil { |
| private static final Logger log = LoggerFactory.getLogger(SerializationUtil.class); |
| |
| private SerializationUtil() {} |
| |
| /** |
| * Create a new instance of a class whose name is given, as a descendent of a given subclass. |
| */ |
| public static <E> E subclassNewInstance(String classname, Class<E> parentClass) { |
| Class<?> c; |
| try { |
| c = Class.forName(classname); |
| } catch (ClassNotFoundException e) { |
| throw new IllegalArgumentException("Can't find class: " + classname, e); |
| } |
| Class<? extends E> cm; |
| try { |
| cm = c.asSubclass(parentClass); |
| } catch (ClassCastException e) { |
| throw new IllegalArgumentException( |
| classname + " is not a subclass of " + parentClass.getName(), e); |
| } |
| try { |
| return cm.newInstance(); |
| } catch (InstantiationException | IllegalAccessException e) { |
| throw new IllegalArgumentException("can't instantiate new instance of " + cm.getName(), e); |
| } |
| } |
| |
| public static String serializeWritableBase64(Writable writable) { |
| byte[] b = serializeWritable(writable); |
| return Base64.getEncoder().encodeToString(b); |
| } |
| |
| public static void deserializeWritableBase64(Writable writable, String str) { |
| byte[] b = Base64.getDecoder().decode(str); |
| deserializeWritable(writable, b); |
| } |
| |
| public static String serializeBase64(Serializable obj) { |
| byte[] b = serialize(obj); |
| return Base64.getEncoder().encodeToString(b); |
| } |
| |
| public static Object deserializeBase64(String str) { |
| byte[] b = Base64.getDecoder().decode(str); |
| return deserialize(b); |
| } |
| |
| // Interop with Hadoop Writable |
| // ----------------------------------------------------------------------- |
| |
| public static byte[] serializeWritable(Writable writable) { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(512); |
| serializeWritable(writable, baos); |
| return baos.toByteArray(); |
| } |
| |
| public static void serializeWritable(Writable obj, OutputStream outputStream) { |
| Objects.requireNonNull(obj); |
| Objects.requireNonNull(outputStream); |
| DataOutputStream out = null; |
| try { |
| out = new DataOutputStream(outputStream); |
| obj.write(out); |
| } catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } finally { |
| if (out != null) |
| try { |
| out.close(); |
| } catch (IOException e) { |
| log.error("cannot close", e); |
| } |
| } |
| } |
| |
| public static void deserializeWritable(Writable writable, InputStream inputStream) { |
| Objects.requireNonNull(writable); |
| Objects.requireNonNull(inputStream); |
| DataInputStream in = null; |
| try { |
| in = new DataInputStream(inputStream); |
| writable.readFields(in); |
| } catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } finally { |
| if (in != null) |
| try { |
| in.close(); |
| } catch (IOException e) { |
| log.error("cannot close", e); |
| } |
| } |
| } |
| |
| public static void deserializeWritable(Writable writable, byte[] objectData) { |
| Objects.requireNonNull(objectData); |
| deserializeWritable(writable, new ByteArrayInputStream(objectData)); |
| } |
| |
| // Serialize |
| // ----------------------------------------------------------------------- |
| |
| /** |
| * Serializes an {@code Object} to the specified stream. |
| * <p> |
| * The stream will be closed once the object is written. This avoids the need for a finally |
| * clause, and maybe also exception handling, in the application code. |
| * <p> |
| * The stream passed in is not buffered internally within this method. This is the responsibility |
| * of your application if desired. |
| * |
| * @param obj |
| * the object to serialize to bytes, may be null |
| * @param outputStream |
| * the stream to write to, must not be null |
| * @throws IllegalArgumentException |
| * if {@code outputStream} is {@code null} |
| */ |
| public static void serialize(Serializable obj, OutputStream outputStream) { |
| Objects.requireNonNull(outputStream); |
| ObjectOutputStream out = null; |
| try { |
| out = new ObjectOutputStream(outputStream); |
| out.writeObject(obj); |
| } catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } finally { |
| if (out != null) |
| try { |
| out.close(); |
| } catch (IOException e) { |
| log.error("cannot close", e); |
| } |
| } |
| } |
| |
| /** |
| * Serializes an {@code Object} to a byte array for storage/serialization. |
| * |
| * @param obj |
| * the object to serialize to bytes |
| * @return a byte[] with the converted Serializable |
| */ |
| public static byte[] serialize(Serializable obj) { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(512); |
| serialize(obj, baos); |
| return baos.toByteArray(); |
| } |
| |
| // Deserialize |
| // ----------------------------------------------------------------------- |
| |
| /** |
| * Deserializes an {@code Object} from the specified stream. |
| * <p> |
| * The stream will be closed once the object is written. This avoids the need for a finally |
| * clause, and maybe also exception handling, in the application code. |
| * <p> |
| * The stream passed in is not buffered internally within this method. This is the responsibility |
| * of your application if desired. |
| * |
| * @param inputStream |
| * the serialized object input stream, must not be null |
| * @return the deserialized object |
| * @throws IllegalArgumentException |
| * if {@code inputStream} is {@code null} |
| */ |
| public static Object deserialize(InputStream inputStream) { |
| Objects.requireNonNull(inputStream); |
| ObjectInputStream in = null; |
| try { |
| in = new ObjectInputStream(inputStream); |
| return in.readObject(); |
| } catch (ClassNotFoundException | IOException ex) { |
| throw new RuntimeException(ex); |
| } finally { |
| if (in != null) |
| try { |
| in.close(); |
| } catch (IOException e) { |
| log.error("cannot close", e); |
| } |
| } |
| } |
| |
| /** |
| * Deserializes a single {@code Object} from an array of bytes. |
| * |
| * @param objectData |
| * the serialized object, must not be null |
| * @return the deserialized object |
| * @throws IllegalArgumentException |
| * if {@code objectData} is {@code null} |
| */ |
| public static Object deserialize(byte[] objectData) { |
| Objects.requireNonNull(objectData); |
| return deserialize(new ByteArrayInputStream(objectData)); |
| } |
| |
| } |