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1
19
20 package org.netbeans.modules.javacore.parser;
21
22 import java.util.*;
23
24
28 public class MethodScope implements ScopeMember {
29
30 private MethodScope parentScope;
31 private Map positiveCache;
32 private Set negativeCache;
33 private ArrayList members;
34
35
36 MethodScope(MethodScope parent) {
37 parentScope=parent;
38 positiveCache=new HashMap();
39 negativeCache=new HashSet();
40 members=new ArrayList();
41 }
42
43 public Object  lookup(final Object key) {
44 Object val=positiveCache.get(key);
45 Object valParent=null;
46
47 if (val!=null)
48 return val;
49 if (negativeCache.contains(key))
50 return null;
51 val=lookupMembers(key);
52 if (parentScope!=null)
53 valParent=parentScope.lookup(key);
54 val=combine(val,valParent);
55 if (val!=null)
56 positiveCache.put(key,val);
57 else
58 negativeCache.add(key);
59 return val;
60 }
61
62 void addMember(final ScopeMember member) {
63 positiveCache.clear();
64 negativeCache.clear();
65 members.add(member);
66 }
67
68 public boolean equals(Object obj) {
69 if (obj!=null && obj instanceof MethodScope) {
70 MethodScope sc=(MethodScope)obj;
71 if (!members.equals(sc.members))
72 return false;
73 if (parentScope==null)
74 return parentScope==sc.parentScope;
75 return parentScope.equals(sc.parentScope);
76 }
77 return false;
78 }
79
80 protected Object clone() {
81 MethodScope cloned=new MethodScope(parentScope);
82
83 cloned.members=(ArrayList)members.clone();
84 return cloned;
85 }
86
87 private Object combine(Object val,Object val1) {
88 List valList;
89
90 if (val==null)
91 return val1;
92 if (val1==null)
93 return val;
94 if (!(val instanceof List)) {
95 valList=new ArrayList();
96 valList.add(val);
97 } else {
98 valList=(List)val;
99 }
100 if (!(val1 instanceof List)) {
101 valList.add(val1);
102 } else {
103 valList.addAll((Collection)val1);
104 }
105 return valList;
106 }
107
108 private Object lookupMembers(final Object key) {
109 Iterator it=members.iterator();
110 Object value=null;
111
112 while(it.hasNext()) {
113 ScopeMember m=(ScopeMember)it.next();
114 Object val=m.lookup(key);
115
116 if (val==null)
117 continue;
118 if (value==null) {
119 value=val;
120 continue;
121 }
122 value=combine(value,val);
123 }
124 return value;
125 }
126 } |
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