| /** |
| * 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.drill.exec.cache; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInput; |
| import java.io.DataInputStream; |
| import java.io.DataOutput; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.ObjectInput; |
| import java.io.ObjectOutput; |
| import java.io.OutputStream; |
| |
| import org.apache.drill.common.util.DataInputInputStream; |
| import org.apache.drill.common.util.DataOutputOutputStream; |
| |
| /** |
| * Helper class that holds the basic functionality to interchangeably use |
| * the different Drill serializble interfaces. This is package private as |
| * users should utilize either AbstractDataSerializable or AbstractStreamSerializable |
| * instead to avoid infinite loops. |
| */ |
| abstract class LoopedAbstractDrillSerializable implements DrillSerializable { |
| // private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(LoopedAbstractDrillSerializable.class); |
| |
| @Override |
| public void writeExternal(ObjectOutput out) throws IOException { |
| final ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| writeToStream(baos); |
| final byte[] ba = baos.toByteArray(); |
| out.writeInt(ba.length); |
| out.write(ba); |
| } |
| |
| @Override |
| public void read(DataInput input) throws IOException { |
| readFromStream(DataInputInputStream.constructInputStream(input)); |
| } |
| |
| @Override |
| public void write(DataOutput output) throws IOException { |
| writeToStream(DataOutputOutputStream.constructOutputStream(output)); |
| } |
| |
| @Override |
| public void readFromStream(InputStream input) throws IOException { |
| read(new DataInputStream(input)); |
| } |
| |
| @Override |
| public void writeToStream(OutputStream output) throws IOException { |
| write(new DataOutputStream(output)); |
| } |
| |
| @Override |
| public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { |
| final int len = in.readInt(); |
| final byte[] bytes = new byte[len]; |
| in.readFully(bytes); |
| readFromStream(new ByteArrayInputStream(bytes)); |
| } |
| } |