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Java > Open Source Codes > org > columba > ristretto > pop3 > POP3MultiLineStream


1 /* ***** BEGIN LICENSE BLOCK *****
2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Mozilla Public License Version
5  * 1.1 (the "License"); you may not use this file except in compliance with
6  * the License. You may obtain a copy of the License at
7  * http://www.mozilla.org/MPL/
8  *
9  * Software distributed under the License is distributed on an "AS IS" basis,
10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11  * for the specific language governing rights and limitations under the
12  * License.
13  *
14  * The Original Code is Ristretto Mail API.
15  *
16  * The Initial Developers of the Original Code are
17  * Timo Stich and Frederik Dietz.
18  * Portions created by the Initial Developers are Copyright (C) 2004
19  * All Rights Reserved.
20  *
21  * Contributor(s):
22  *
23  * Alternatively, the contents of this file may be used under the terms of
24  * either the GNU General Public License Version 2 or later (the "GPL"), or
25  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
26  * in which case the provisions of the GPL or the LGPL are applicable instead
27  * of those above. If you wish to allow use of your version of this file only
28  * under the terms of either the GPL or the LGPL, and not to allow others to
29  * use your version of this file under the terms of the MPL, indicate your
30  * decision by deleting the provisions above and replace them with the notice
31  * and other provisions required by the GPL or the LGPL. If you do not delete
32  * the provisions above, a recipient may use your version of this file under
33  * the terms of any one of the MPL, the GPL or the LGPL.
34  *
35  * ***** END LICENSE BLOCK ***** */

36 package org.columba.ristretto.pop3;
37
38 import java.io.FilterInputStream JavaDoc;
39 import java.io.IOException JavaDoc;
40 import java.io.InputStream JavaDoc;
41
42 /**
43  * FilterInputStream that filters correctly
44  * a multiline response from a POP3 server.
45  *
46  * @author Timo Stich <tstich@users.sourceforge.net>
47  */

48 public class POP3MultiLineStream extends FilterInputStream JavaDoc {
49
50     private boolean eof;
51     private int size;
52     private int readCount;
53     private boolean newLine;
54
55     /**
56      * Constructs a POP3MultiLineStream
57      *
58      * @param in the InputStream from the socket
59      * @param size
60      */

61     public POP3MultiLineStream(InputStream JavaDoc in, int size) {
62         super(in);
63         
64         this.size = size;
65         eof = false;
66         
67         newLine = true;
68     }
69     
70     
71
72     /**
73      * @see java.io.InputStream#read()
74      */

75     public int read() throws IOException JavaDoc {
76         if( eof ) return -1;
77         
78         // read from underlying stream
79
int read = in.read();
80         
81         // test if this is the last line
82
if( read == '.' && newLine ) {
83             read = in.read();
84             if( read == '\r' ) {
85                 // EOF found
86
eof = true;
87                 
88                 //read the LF
89
in.read();
90                 
91                 return -1;
92             } else {
93                 // remove this '.'
94
readCount++;
95                 newLine = false;
96                 return read;
97             }
98         } else {
99             newLine = (read == '\n');
100             readCount++;
101             return read;
102         }
103     }
104
105     /**
106      * @see java.io.InputStream#read(byte[], int, int)
107      */

108     public int read(byte[] arg0, int arg1, int arg2) throws IOException JavaDoc {
109         int next;
110         for( int i=0; i<arg2; i++) {
111             next = read();
112             if( next == -1 ) {
113                 if( i == 0 ) {
114                     return -1;
115                 } else {
116                     return i;
117                 }
118             }
119             arg0[arg1+i] = (byte) next;
120         }
121         return arg2;
122     }
123
124     /**
125      * @see java.io.InputStream#available()
126      */

127     public int available() throws IOException JavaDoc {
128         return size - readCount;
129     }
130
131 }
132
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