| /** |
| * 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.hadoop.typedbytes; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.BytesWritable; |
| |
| /** |
| * Writable for typed bytes. |
| */ |
| public class TypedBytesWritable extends BytesWritable { |
| |
| /** Create a TypedBytesWritable. */ |
| public TypedBytesWritable() { |
| super(); |
| } |
| |
| /** Create a TypedBytesWritable with a given byte array as initial value. */ |
| public TypedBytesWritable(byte[] bytes) { |
| super(bytes); |
| } |
| |
| /** Set the typed bytes from a given Java object. */ |
| public void setValue(Object obj) { |
| try { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| TypedBytesOutput tbo = TypedBytesOutput.get(new DataOutputStream(baos)); |
| tbo.write(obj); |
| byte[] bytes = baos.toByteArray(); |
| set(bytes, 0, bytes.length); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** Get the typed bytes as a Java object. */ |
| public Object getValue() { |
| try { |
| ByteArrayInputStream bais = new ByteArrayInputStream(getBytes()); |
| TypedBytesInput tbi = TypedBytesInput.get(new DataInputStream(bais)); |
| Object obj = tbi.read(); |
| return obj; |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** Get the type code embedded in the first byte. */ |
| public Type getType() { |
| byte[] bytes = getBytes(); |
| if (bytes == null || bytes.length == 0) { |
| return null; |
| } |
| for (Type type : Type.values()) { |
| if (type.code == (int) bytes[0]) { |
| return type; |
| } |
| } |
| return null; |
| } |
| |
| /** Generate a suitable string representation. */ |
| public String toString() { |
| return getValue().toString(); |
| } |
| |
| } |