blob: 717b0f47f291e56758d07f423657e2d19eb32388 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
//code stolen from org.apache.batik.util and modified slightly
//does what sun.misc.Service probably does, but it cannot be relied on.
//hopefully will be part of standard jdk sometime.
/**
* This class loads services present in the class path.
*/
public class Service {
private static Map providerMap = new java.util.Hashtable();
public static synchronized Iterator providers(Class cls) {
ClassLoader cl = cls.getClassLoader();
// null if loaded by bootstrap class loader
if (cl == null) {
cl = ClassLoader.getSystemClassLoader();
}
String serviceFile = "META-INF/services/" + cls.getName();
// log.debug("File: " + serviceFile);
List lst = (List)providerMap.get(serviceFile);
if (lst != null) {
return lst.iterator();
}
lst = new java.util.Vector();
providerMap.put(serviceFile, lst);
Enumeration e;
try {
e = cl.getResources(serviceFile);
} catch (IOException ioe) {
return lst.iterator();
}
while (e.hasMoreElements()) {
try {
java.net.URL u = (java.net.URL)e.nextElement();
//log.debug("URL: " + u);
InputStream is = u.openStream();
Reader r = new InputStreamReader(is, "UTF-8");
BufferedReader br = new BufferedReader(r);
String line = br.readLine();
while (line != null) {
try {
// First strip any comment...
int idx = line.indexOf('#');
if (idx != -1) {
line = line.substring(0, idx);
}
// Trim whitespace.
line = line.trim();
// If nothing left then loop around...
if (line.length() == 0) {
line = br.readLine();
continue;
}
// log.debug("Line: " + line);
// Try and load the class
// Object obj = cl.loadClass(line).newInstance();
// stick it into our vector...
lst.add(line);
} catch (Exception ex) {
// Just try the next line
}
line = br.readLine();
}
} catch (Exception ex) {
// Just try the next file...
}
}
return lst.iterator();
}
}
|
