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.transforms;
014
015import static org.apache.juneau.internal.StringUtils.*;
016
017import org.apache.juneau.*;
018import org.apache.juneau.transform.*;
019
020/**
021 * Transforms <code><jk>byte</jk>[]</code> arrays to Strings.
022 */
023public abstract class ByteArraySwap extends StringSwap<byte[]> {
024
025   /**
026    * Converts byte arrays to BASE-64 encoding.
027    */
028   public static class Base64 extends ByteArraySwap {
029      /**
030       * Converts the specified <code><jk>byte</jk>[]</code> to a {@link String}.
031       */
032      @Override /* PojoSwap */
033      public String swap(BeanSession session, byte[] b) throws Exception {
034         return base64Encode(b);
035      }
036
037      /**
038       * Converts the specified {@link String} to a <code><jk>byte</jk>[]</code>.
039       */
040      @Override /* PojoSwap */
041      public byte[] unswap(BeanSession session, String s, ClassMeta<?> hint) throws Exception {
042         return base64Decode(s);
043      }
044   }
045
046   /**
047    * Converts byte arrays to hex encoding.
048    */
049   public static class Hex extends ByteArraySwap {
050      /**
051       * Converts the specified <code><jk>byte</jk>[]</code> to a {@link String}.
052       */
053      @Override /* PojoSwap */
054      public String swap(BeanSession session, byte[] b) throws Exception {
055         return toHex(b);
056      }
057
058      /**
059       * Converts the specified {@link String} to a <code><jk>byte</jk>[]</code>.
060       */
061      @Override /* PojoSwap */
062      public byte[] unswap(BeanSession session, String s, ClassMeta<?> hint) throws Exception {
063         return fromHex(s);
064      }
065   }
066
067   /**
068    * Converts byte arrays to spaced-hex encoding.
069    */
070   public static class SpacedHex extends ByteArraySwap {
071      /**
072       * Converts the specified <code><jk>byte</jk>[]</code> to a {@link String}.
073       */
074      @Override /* PojoSwap */
075      public String swap(BeanSession session, byte[] b) throws Exception {
076         return toSpacedHex(b);
077      }
078
079      /**
080       * Converts the specified {@link String} to a <code><jk>byte</jk>[]</code>.
081       */
082      @Override /* PojoSwap */
083      public byte[] unswap(BeanSession session, String s, ClassMeta<?> hint) throws Exception {
084         return fromSpacedHex(s);
085      }
086   }
087}