001    // Copyright 2006 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // 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
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.internal.util;
016    
017    import org.apache.commons.codec.binary.Base64;
018    
019    import java.io.ByteArrayInputStream;
020    
021    /**
022     * An extension of {@link ByteArrayInputStream} that is initialized from a Base64 input stream (rather than from a byte
023     * array).
024     */
025    public class Base64InputStream extends ByteArrayInputStream
026    {
027        public Base64InputStream(String base64)
028        {
029            super(decode(base64));
030        }
031    
032        private static byte[] decode(String base64)
033        {
034            byte[] array = base64.getBytes();
035    
036            return Base64.decodeBase64(array);
037        }
038    }