Logger.java revision 20484654bc7c2407da40226d5188acfc37ee1c2b 
1/*
2 *  Licensed to the Apache Software Foundation (ASF) under one or more
3 *  contributor license agreements.  See the NOTICE file distributed with
4 *  this work for additional information regarding copyright ownership.
5 *  The ASF licenses this file to You under the Apache License, Version 2.0
6 *  (the "License"); you may not use this file except in compliance with
7 *  the License.  You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 */
17
18package org.apache.harmony.xnet.provider.jsse;
19
20import java.io.PrintStream;
21import java.util.Locale;
22import libcore.util.EmptyArray;
23
24/**
25 * This class provides debug logging for JSSE provider implementation
26 * TODO: Use java.util.logging
27 */
28public class Logger {
29
30    public static class Stream extends PrintStream {
31        private final String prefix;
32        private static int indent = 0;
33
34        public Stream(String name) {
35            super(System.err);
36            prefix = name + "["+Thread.currentThread().getName()+"] ";
37        }
38
39        @Override
40        public void print(String msg) {
41            for (int i=0; i<indent; i++) {
42                super.print("  ");
43            }
44            super.print(msg);
45        }
46
47        public void newIndent() {
48            indent ++;
49        }
50
51        public void endIndent() {
52            indent --;
53        }
54
55        @Override
56        public void println(String msg) {
57            print(prefix);
58            super.println(msg);
59        }
60
61        public void print(byte[] data) {
62            printAsHex(16, " ", "", data, 0, data.length);
63        }
64
65        public void print(byte[] data, int offset, int len) {
66            printAsHex(16, " ", "", data, offset, len);
67        }
68
69        public void printAsHex(int perLine, String prefix, String delimiter, byte[] data) {
70            printAsHex(perLine, prefix, delimiter, data, 0, data.length);
71        }
72
73        public void printAsHex(int perLine, String prefix, String delimiter,
74                byte[] data, int offset, int len) {
75            StringBuilder line = new StringBuilder();
76            for (int i = 0; i < len; i++) {
77                line.append(prefix);
78                line.append(Byte.toHexString(data[i+offset], false));
79                line.append(delimiter);
80
81                if (((i+1)%perLine) == 0) {
82                    super.println(line.toString());
83                    line = new StringBuilder();
84                }
85            }
86            super.println(line.toString());
87        }
88    }
89
90    private static String[] names;
91
92    static {
93        try {
94            names = System.getProperty("jsse", "").split(",");
95        } catch (Exception e) {
96            names = EmptyArray.STRING;
97        }
98    }
99
100    public static Stream getStream(String name) {
101        for (int i=0; i<names.length; i++) {
102            if (names[i].equals(name)) {
103                return new Stream(name);
104            }
105        }
106        return null;
107    }
108}
109