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15 package jfun.yan;
16
17
23 final class UsePropertyComponent<T> extends Component<T> {
24 private final Class  component_type;
25 private final Object key;
26 private final Class <T> type;
27 public boolean isConcrete(){
28 return false;
29 }
30 UsePropertyComponent(Class component_type, final Object key, final Class <T> type) {
31 this.component_type = component_type;
32 this.key = key;
33 this.type = type;
34 }
35 public Class getType() {
36 return type;
37 }
38 public T create(Dependency pp){
39 return (T)findDependency(pp).getProperty(component_type, key, type);
40 }
41 public Class verify(Dependency pp){
42 return findDependency(pp).verifyProperty(component_type, key, type);
43 }
44
45 public boolean equals(Object obj) {
46 if(obj instanceof UsePropertyComponent){
47 final UsePropertyComponent other = (UsePropertyComponent)obj;
48 return component_type.equals(other.component_type) && type.equals(other.type) && key.equals(other.key);
49 }
50 else return false;
51 }
52 public int hashCode() {
53 return (key.hashCode()*31 + type.hashCode())*31+component_type.hashCode();
54 }
55 public String toString() {
56 return "useProperty(" + component_type.getName()+"," + key + ","+jfun.util.Misc.getTypeName(type)+")";
57 }
58 private Dependency findDependency(Dependency dep){
59 final Dependency parent = dep.getParent();
60 if(parent == null)
61 throw new YanException("useProperty can only be used for parameter or property");
62 return parent;
63 }
64 public boolean isSingleton(){
65 return false;
66 }
67 }
68 |
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Java API By Example, From Geeks To Geeks.