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19 package org.netbeans.modules.javacore.parser;
20
21 import java.lang.ref.Reference  ;
22 import java.lang.ref.WeakReference ;
23 import org.netbeans.lib.java.parser.ASTree;
24 import org.netbeans.lib.java.parser.ASTreeTypes;
25 import org.netbeans.modules.javacore.jmiimpl.javamodel.ResourceImpl;
26 import org.netbeans.modules.javacore.jmiimpl.javamodel.SemiPersistentElement;
27
28
32 public class ElementInfo {
33 public static final int SINGLE_IMPORT_TYPE = ASTreeTypes.SINGLE_TYPE_IMPORT;
34 public static final int IMPORT_ON_DEMAND_TYPE = ASTreeTypes.TYPE_IMPORT_ON_DEMAND;
35
36 public static final TypeRef[] EMPTY_TYPEREFS = new TypeRef[0];
37 public static final NameRef[] EMPTY_NAMEREFS = new NameRef[0];
38 public static final TypeParamRef[] EMPTY_TPREFS = new TypeParamRef[0];
39
40 public static final ClassInfo[] EMPTY_FEATURES = new ClassInfo[0];
41 public static final ParameterInfo[] EMPTY_PARAMETERS = new ParameterInfo[0];
42 public static final TypeParamInfo[] EMPTY_TYPE_PARAMS = new TypeParamInfo[0];
43 public static final AnnotationInfo[] EMPTY_ANNOTATIONS = new AnnotationInfo[0];
44 public static final AnnotationValueInfo[] EMPTY_ANNOTATION_VALUES = new AnnotationValueInfo[0];
45
46 protected Reference tree;
47 protected final ResourceImpl resource;
48 private final int firstToken, lastToken;
49 private final int astType;
50
51 public final int infoType;
52 public final String name;
53
54 public static Reference createASTReference(ASTree tree) {
55 return new CachedReference(tree);
56 }
57
58 public ElementInfo(ASTree tree, int infoType, String name) {
59 if (tree == null) {
60 this.tree = null;
61 this.astType = this.firstToken = this.lastToken = 0;
62 this.resource = null;
63 } else {
64 this.resource = (ResourceImpl) ((MDRParser) tree.getASTContext()).getResource();
65 this.tree = createASTReference(tree);
66 this.firstToken = tree.getFirstToken();
67 this.lastToken = tree.getLastToken();
68 this.astType = tree.getType();
69 }
70 this.infoType = infoType;
71 this.name = name;
72 }
73
74 public void hardRefAST() {
75 resource.getElementInfo().hardRefAST();
76 }
77
78 public final Reference getASTree() {
79 return tree;
80 }
81
82 public ASTree refreshASTree() {
83 ASTree parentTree = resource.getASTree();
84 ASTProvider parser = (ASTProvider) parentTree.getASTContext();
85 ASTree result = parser.findTree(parentTree, firstToken, lastToken, astType);
87 this.tree = createASTReference(result);
88 return result;
89 }
90
91 public ASTree getTypeAST(SemiPersistentElement owner) {
92 ASTree tree = owner.getASTree();
93 if (tree != null) {
94 int type=tree.getType();
95 ASTree parts[]=tree.getSubTrees();
96
97 if (type==ASTreeTypes.SINGLE_TYPE_IMPORT || type==ASTreeTypes.TYPE_IMPORT_ON_DEMAND)
98 return parts[1];
99 return parts[0];
100 }
101 return null;
102 }
103
104 static class CachedReference extends WeakReference {
105 private static final int CACHE_SIZE = Integer.getInteger("org.netbeans.javacore.ASTCache.size", new Integer (2)).intValue(); private static final Cache CACHE = new Cache(CACHE_SIZE);
107 private static int requests = 0;
108
109 CachedReference(ASTree tree) {
110 super(tree);
111 MDRParser parser = (MDRParser) tree.getASTContext();
112 CACHE.put(parser);
113 }
114
115 public Object get() {
116 ASTree result = (ASTree) super.get();
117 if (result != null) {
118 MDRParser parser = (MDRParser) result.getASTContext();
119 CACHE.put(parser);
120 }
121 return result;
122 }
123 }
124
125
126 static class Cache {
127 private final MDRParser[] cachedInstances;
128
129
130 public Cache(int size) {
131 cachedInstances = new MDRParser[size];
132 }
133
134 public synchronized void put(MDRParser instance) {
135 MDRParser ce = instance;
136 for (int i = 0; i < cachedInstances.length; i++) {
137 MDRParser temp = cachedInstances[i];
138 cachedInstances[i] = ce;
139 ce = temp;
140 if (temp == null || temp == instance || temp.getFileObject().equals(instance.getFileObject())) {
141 break;
142 }
143 }
144 }
145
146 public void dump() {
147 System.err.println("******** Cache dump:");
148 for (int i = 0; i < cachedInstances.length; i++) {
149 System.err.println(cachedInstances[i].toString());
150 }
151 System.err.println("*********");
152 }
153 }
154 }
155 |
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