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
|
// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.servlet.jersey
import javax.ws.rs.Path
import javax.ws.rs.ext.Provider
import org.objectweb.asm.{ClassVisitor, Opcodes, Type, AnnotationVisitor, ClassReader}
/**
* @author tonytv
*/
class ResourceOrProviderClassVisitor private () extends ClassVisitor(Opcodes.ASM5) {
private var className: String = null
private var isPublic: Boolean = false
private var isAbstract = false
private var isInnerClass: Boolean = false
private var isStatic: Boolean = false
private var isAnnotated: Boolean = false
def getJerseyClassName: Option[String] = {
if (isJerseyClass) Some(getClassName)
else None
}
def isJerseyClass: Boolean = {
isAnnotated && isPublic && !isAbstract &&
(!isInnerClass || isStatic)
}
def getClassName = {
assert (className != null)
Type.getObjectType(className).getClassName
}
override def visit(version: Int, access: Int, name: String, signature: String, superName: String, interfaces: Array[String]) {
isPublic = ResourceOrProviderClassVisitor.isPublic(access)
className = name
isAbstract = ResourceOrProviderClassVisitor.isAbstract(access)
}
override def visitInnerClass(name: String, outerName: String, innerName: String, access: Int) {
assert (className != null)
if (name == className) {
isInnerClass = true
isStatic = ResourceOrProviderClassVisitor.isStatic(access)
}
}
override def visitAnnotation(desc: String, visible: Boolean): AnnotationVisitor = {
isAnnotated |= ResourceOrProviderClassVisitor.annotationClassDescriptors(desc)
null
}
}
object ResourceOrProviderClassVisitor {
val annotationClassDescriptors = Set(classOf[Path], classOf[Provider]) map Type.getDescriptor
def isPublic = isSet(Opcodes.ACC_PUBLIC) _
def isStatic = isSet(Opcodes.ACC_STATIC) _
def isAbstract = isSet(Opcodes.ACC_ABSTRACT) _
private def isSet(bits: Int)(access: Int): Boolean = (access & bits) == bits
def visit(classReader: ClassReader): ResourceOrProviderClassVisitor = {
val visitor = new ResourceOrProviderClassVisitor
classReader.accept(visitor, ClassReader.SKIP_DEBUG | ClassReader.SKIP_CODE | ClassReader.SKIP_FRAMES)
visitor
}
}
|
