001    /*
002     * Copyright 2010 The Apache Software Foundation.
003     * 
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     * 
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     * 
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.vafer.jdeb.utils;
017    
018    import java.io.IOException;
019    import java.io.OutputStream;
020    import java.security.DigestOutputStream;
021    import java.security.MessageDigest;
022    
023    /**
024     * Convinience class to provide MD5 and length of a stream.
025     * 
026     * ATTENTION: don't use outside of jdeb
027     *  
028     * @author Torsten Curdt <tcurdt@vafer.org>
029     */
030    public class InformationOutputStream extends DigestOutputStream {
031    
032        private final MessageDigest digest;
033        private long size;
034        
035        public InformationOutputStream(OutputStream pStream, MessageDigest pDigest) {
036            super(pStream, pDigest);
037            digest = pDigest;
038            size = 0;
039        }
040        
041        public String getMd5() {
042            return Utils.toHex(digest.digest());
043        }
044        
045        public void write(byte[] b, int off, int len) throws IOException {
046            super.write(b, off, len);
047            size += len;
048        }
049    
050        public void write(int b) throws IOException {
051            super.write(b);
052            size++;
053        }
054    
055        public long getSize() {
056            return size;
057        }
058    }