001    /**
002     *
003     * Copyright 2003-2006 The Apache Software Foundation
004     *
005     *  Licensed under the Apache License, Version 2.0 (the "License");
006     *  you may not use this file except in compliance with the License.
007     *  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    
018    package org.apache.geronimo.mail.util;
019    
020    import java.io.IOException;
021    import java.io.OutputStream;
022    
023    /**
024     * An implementation of an OutputStream that writes the data directly
025     * out to a StringBuffer object.  Useful for applications where an
026     * intermediate ByteArrayOutputStream is required to append generated
027     * characters to a StringBuffer;
028     */
029    public class StringBufferOutputStream extends OutputStream {
030    
031        // the target buffer
032        protected StringBuffer buffer;
033    
034        /**
035         * Create an output stream that writes to the target StringBuffer
036         *
037         * @param out    The wrapped output stream.
038         */
039        public StringBufferOutputStream(StringBuffer out) {
040            buffer = out;
041        }
042    
043    
044        // in order for this to work, we only need override the single character form, as the others
045        // funnel through this one by default.
046        public void write(int ch) throws IOException {
047            // just append the character
048            buffer.append((char)ch);
049        }
050    }
051    
052    
053