1 | |
|
2 | |
|
3 | |
|
4 | |
|
5 | |
|
6 | |
|
7 | |
package org.mule.util.scan; |
8 | |
|
9 | |
import org.mule.util.scan.annotations.ClosableClassReader; |
10 | |
|
11 | |
import java.io.IOException; |
12 | |
import java.io.InputStream; |
13 | |
import java.net.URL; |
14 | |
|
15 | |
import org.objectweb.asm.ClassReader; |
16 | |
import org.objectweb.asm.commons.EmptyVisitor; |
17 | |
|
18 | |
|
19 | |
|
20 | |
|
21 | |
public class InterfaceClassScanner extends EmptyVisitor implements ClassScanner |
22 | |
{ |
23 | |
private Class interfaceClass; |
24 | |
|
25 | |
private boolean match; |
26 | |
|
27 | |
private String className; |
28 | |
|
29 | |
private ClassLoader classLoader; |
30 | |
|
31 | |
public InterfaceClassScanner(Class interfaceClass) |
32 | |
{ |
33 | 0 | this(interfaceClass, Thread.currentThread().getContextClassLoader()); |
34 | 0 | } |
35 | |
|
36 | |
public InterfaceClassScanner(Class interfaceClass, ClassLoader classLoader) |
37 | 0 | { |
38 | 0 | if(!interfaceClass.isInterface()) |
39 | |
{ |
40 | 0 | throw new IllegalArgumentException("The class need to be an interface"); |
41 | |
} |
42 | 0 | this.interfaceClass = interfaceClass; |
43 | |
|
44 | 0 | this.classLoader = classLoader; |
45 | 0 | } |
46 | |
|
47 | |
public void visit(int i, int i1, String s, String s1, String superName, String[] interfaces) |
48 | |
{ |
49 | 0 | if (interfaces != null && interfaces.length > 0) |
50 | |
{ |
51 | 0 | for (int j = 0; j < interfaces.length; j++) |
52 | |
{ |
53 | 0 | String anInterface = interfaces[j].replace("/", "."); |
54 | 0 | if (interfaceClass.getName().equals(anInterface)) |
55 | |
{ |
56 | 0 | match = true; |
57 | 0 | className = s; |
58 | 0 | break; |
59 | |
} |
60 | |
else |
61 | |
{ |
62 | |
|
63 | 0 | ClassScanner scanner = scan(anInterface); |
64 | 0 | match = scanner.isMatch(); |
65 | 0 | className = s; |
66 | |
} |
67 | |
|
68 | |
} |
69 | |
} |
70 | |
|
71 | 0 | else if (superName == null) |
72 | |
{ |
73 | 0 | return; |
74 | |
} |
75 | |
else |
76 | |
{ |
77 | |
|
78 | 0 | ClassScanner scanner = scan(superName); |
79 | 0 | match = scanner.isMatch(); |
80 | 0 | className = scanner.getClassName(); |
81 | |
|
82 | 0 | if(match) |
83 | |
{ |
84 | 0 | className = s; |
85 | |
} |
86 | |
} |
87 | 0 | } |
88 | |
|
89 | |
protected ClassScanner scan(String name) |
90 | |
{ |
91 | |
try |
92 | |
{ |
93 | 0 | InterfaceClassScanner scanner = new InterfaceClassScanner(interfaceClass, classLoader); |
94 | 0 | URL classURL = getClassURL(name); |
95 | 0 | if(classURL==null) |
96 | |
{ |
97 | 0 | throw new RuntimeException("Failed to read class URL for name: " + name); |
98 | |
} |
99 | 0 | InputStream classStream = classURL.openStream(); |
100 | 0 | ClassReader r = new ClosableClassReader(classStream); |
101 | |
|
102 | 0 | r.accept(scanner, 0); |
103 | 0 | return scanner; |
104 | |
} |
105 | 0 | catch (IOException e) |
106 | |
{ |
107 | 0 | throw new RuntimeException(name, e); |
108 | |
} |
109 | |
} |
110 | |
|
111 | |
public boolean isMatch() |
112 | |
{ |
113 | 0 | return match; |
114 | |
} |
115 | |
|
116 | |
public String getClassName() |
117 | |
{ |
118 | 0 | return className; |
119 | |
} |
120 | |
|
121 | |
public URL getClassURL(String className) |
122 | |
{ |
123 | 0 | String resource = className.replace(".", "/") + ".class"; |
124 | 0 | return classLoader.getResource(resource); |
125 | |
} |
126 | |
} |