/tags/release-0.2.0-rc0/hive/external/contrib/src/java/org/apache/hadoop/hive/contrib/util/typedbytes/TypedBytesWritable.java
# · Java · 89 lines · 52 code · 11 blank · 26 comment · 7 complexity · 8cfa182eca4ed55d79dfea71fa047e56 MD5 · raw file
- /**
- * 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.hive.contrib.util.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(get());
- 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 = get();
- if (bytes == null || bytes.length == 0) {
- return null;
- }
- for (Type type : Type.values()) {
- if (type.code == bytes[0]) {
- return type;
- }
- }
- return null;
- }
- /** Generate a suitable string representation. */
- @Override
- public String toString() {
- return getValue().toString();
- }
- }