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1 package com.tirsen.nanning.config;
2
3 import com.tirsen.nanning.AspectException;
4 import com.tirsen.nanning.AspectInstance;
5 import com.tirsen.nanning.MethodInterceptor;
6 import com.tirsen.nanning.MixinInstance;
7
8 import java.lang.reflect.Method  ;
9
10 public class InterceptorAspect implements Aspect {
11 public static final int SINGLETON = 0;
12 public static final int PER_METHOD = SINGLETON + 1;
13 public static final int PER_INSTANCE = PER_METHOD + 1;
14
15 private Class interceptorClass;
16 private int stateManagement;
17 private MethodInterceptor singletonInterceptor;
18 private Pointcut pointcut;
19
20 public InterceptorAspect(MethodInterceptor interceptor) {
21 this(new AllPointcut(), interceptor);
22 }
23
24 public InterceptorAspect(Class interceptorClass, int stateManagement) {
25 this(new AllPointcut(), interceptorClass, stateManagement);
26 }
27
28 public InterceptorAspect(Pointcut pointcut, Class interceptorClass, int stateManagement) {
29 this.stateManagement = stateManagement;
30 assert stateManagement == SINGLETON || stateManagement == PER_METHOD || stateManagement == PER_INSTANCE
31 : "SINGLETON, PER_METHOD and PER_INSTANCE is supported only, not " + stateManagement;
32
33 if (stateManagement == SINGLETON) {
34 singletonInterceptor = createInterceptor();
35 }
36
37 setPointcut(pointcut);
38
39 this.interceptorClass = interceptorClass;
40 }
41
42 public void setPointcut(Pointcut pointcut) {
43 this.pointcut = pointcut;
44 }
45
46 public InterceptorAspect(Pointcut pointcut, MethodInterceptor interceptor) {
47 this.pointcut = pointcut;
48 singletonInterceptor = interceptor;
49 stateManagement = SINGLETON;
50 }
51
52 public Class getInterceptorClass() {
53 return interceptorClass;
54 }
55
56 public int getStateManagement() {
57 return stateManagement;
58 }
59
60 private MethodInterceptor createInterceptor() {
61 try {
62 return (MethodInterceptor) interceptorClass.newInstance();
63 } catch (Exception e) {
64 throw new AspectException(e);
65 }
66 }
67
68 public void introduce(AspectInstance instance) {
69 }
70
71 Method [] getMethodsToAdvise(AspectInstance instance, MixinInstance mixin) {
72 return pointcut.methodsToAdvise(instance, mixin);
73 }
74
75 public void advise(AspectInstance instance) {
76 if (stateManagement == SINGLETON) {
77 pointcut.advise(instance, singletonInterceptor);
78
79 } else if (stateManagement == PER_INSTANCE) {
80 pointcut.advise(instance, createInterceptor());
81
82 } else if (stateManagement == PER_METHOD) {
83 pointcut.advise(instance, interceptorClass);
84
85 }
86 }
87
88 public Pointcut getPointcut() {
89 return pointcut;
90 }
91 }
92 |
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