001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.encoders;
014
015import java.io.*;
016
017/**
018 * Encoder for handling <js>"identity"</js> encoding and decoding (e.g. no encoding at all).
019 */
020public class IdentityEncoder extends Encoder {
021
022   /** Singleton */
023   public static final IdentityEncoder INSTANCE = new IdentityEncoder();
024
025   /** Constructor. */
026   public IdentityEncoder() {}
027
028   @Override /* Encoder */
029   public InputStream getInputStream(InputStream is) throws IOException {
030      return is;
031   }
032
033   @Override /* Encoder */
034   public OutputStream getOutputStream(OutputStream os) throws IOException {
035      return os;
036   }
037
038   /**
039    * Returns <code>[<js>"identity"</js>]</code>.
040    */
041   @Override /* Encoder */
042   public String[] getCodings() {
043      return new String[]{"identity"};
044   }
045}