|
1 package jfun.yan.etc.injection;
2
3
4 import java.util.Hashtable  ;
5 import java.util.Map ;
6
7 import jfun.yan.util.ReflectionUtil;
8
9
15 public class TypeCaseInjection implements Injection {
16 private final Class [] types;
17 private final Injection[] cases;
18
19 private final Map cache = new Hashtable ();
20 public boolean inject(Object obj) {
21 if(obj == null) return true;
22 final Class type = obj.getClass();
23 final Object cached = cache.get(type);
24 if(cached!=null){
25 if(cached instanceof Injection){
26 return ((Injection)cached).inject(obj);
27 }
28 else{
29 return false;
30 }
31 }
32 else{
33 for(int i=0; i<types.length; i++){
34 final Class typecase = types[i];
35 final Injection injection = cases[i];
36 if(ReflectionUtil.isAssignableFrom(typecase, type)){
37 final boolean result = injection.inject(obj);
38 if(result){
39 cache.put(type, injection);
40 return true;
41 }
42 }
43 }
44 cache.put(type, Boolean.valueOf(false));
45 return false;
46 }
47 }
48 public TypeCaseInjection(Class [] types, Injection[] cases) {
49 this.cases = cases;
50 this.types = types;
51 }
52 }
53 |
Popular Tags |
Java API By Example, From Geeks To Geeks.