001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *  http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    package org.apache.geronimo.mail.util;
021    
022    import java.io.IOException;
023    import java.io.OutputStream;
024    
025    /**
026     * An implementation of an OutputStream that writes the data directly
027     * out to a StringBuffer object.  Useful for applications where an
028     * intermediate ByteArrayOutputStream is required to append generated
029     * characters to a StringBuffer;
030     */
031    public class StringBufferOutputStream extends OutputStream {
032    
033        // the target buffer
034        protected StringBuffer buffer;
035    
036        /**
037         * Create an output stream that writes to the target StringBuffer
038         *
039         * @param out    The wrapped output stream.
040         */
041        public StringBufferOutputStream(StringBuffer out) {
042            buffer = out;
043        }
044    
045    
046        // in order for this to work, we only need override the single character form, as the others
047        // funnel through this one by default.
048        public void write(int ch) throws IOException {
049            // just append the character
050            buffer.append((char)ch);
051        }
052    }
053    
054    
055