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.ByteArrayOutputStream;
020    
021    /**
022     * An extension of {@link ByteArrayOutputStream} that allows the final byte array to be converted to a Base64 string.
023     */
024    public final class Base64OutputStream extends ByteArrayOutputStream
025    {
026        public String toBase64()
027        {
028            byte[] binary = toByteArray();
029    
030            byte[] base64 = Base64.encodeBase64(binary);
031    
032            return new String(base64);
033        }
034    }