Logger.java revision ad41624e761bcf1af9c8008eb45187fc13983717 
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 libcore.base.EmptyArray;
22
23/**
24 * This class provides debug logging for JSSE provider implementation
25 * TODO: Use java.util.logging
26 */
27public class Logger {
28
29    public static class Stream extends PrintStream {
30        private final String prefix;
31        private static int indent = 0;
32
33        public Stream(String name) {
34            super(System.err);
35            prefix = name + "["+Thread.currentThread().getName()+"] ";
36        }
37
38        @Override
39        public void print(String msg) {
40            for (int i=0; i<indent; i++) {
41                super.print("  ");
42            }
43            super.print(msg);
44        }
45
46        public void newIndent() {
47            indent ++;
48        }
49
50        public void endIndent() {
51            indent --;
52        }
53
54        @Override
55        public void println(String msg) {
56            print(prefix);
57            super.println(msg);
58        }
59
60        public void print(byte[] data) {
61            printAsHex(16, " ", "", data, 0, data.length);
62        }
63
64        public void print(byte[] data, int offset, int len) {
65            printAsHex(16, " ", "", data, offset, len);
66        }
67
68        public void printAsHex(int perLine,
69                String prefix,
70                String delimiter,
71                byte[] data) {
72            printAsHex(perLine, prefix, delimiter, data, 0, data.length);
73        }
74
75        public void printAsHex(int perLine,
76                String prefix,
77                String delimiter,
78                byte[] data, int offset, int len) {
79            String line = "";
80            for (int i=0; i<len; i++) {
81                String tail =
82                    Integer.toHexString(0x00ff & data[i+offset]).toUpperCase();
83                if (tail.length() == 1) {
84                    tail = "0" + tail;
85                }
86                line += prefix + tail + delimiter;
87
88                if (((i+1)%perLine) == 0) {
89                    super.println(line);
90                    line = "";
91                }
92            }
93            super.println(line);
94        }
95    }
96
97    private static String[] names;
98
99    static {
100        try {
101            names = System.getProperty("jsse", "").split(",");
102        } catch (Exception e) {
103            names = EmptyArray.STRING;
104        }
105    }
106
107    public static Stream getStream(String name) {
108        for (int i=0; i<names.length; i++) {
109            if (names[i].equals(name)) {
110                return new Stream(name);
111            }
112        }
113        return null;
114    }
115}
116