1
2
3
4 package net.sourceforge.pmd.lang.java.symboltable;
5
6 import java.util.ArrayList;
7 import java.util.HashMap;
8 import java.util.HashSet;
9 import java.util.List;
10 import java.util.Map;
11 import java.util.Set;
12
13
14
15
16 public class TypeSet {
17
18
19
20
21
22
23 public interface Resolver {
24 Class<?> resolve(String name) throws ClassNotFoundException;
25 }
26
27 public static class ExplicitImportResolver implements Resolver {
28 private Set<String> importStmts;
29
30 public ExplicitImportResolver(Set<String> importStmts) {
31 this.importStmts = importStmts;
32 }
33
34 public Class<?> resolve(String name) throws ClassNotFoundException {
35 for (String importStmt : importStmts) {
36 if (importStmt.endsWith(name)) {
37 return Class.forName(importStmt);
38 }
39 }
40 throw new ClassNotFoundException("Type " + name + " not found");
41 }
42 }
43
44 public static class CurrentPackageResolver implements Resolver {
45 private String pkg;
46
47 public CurrentPackageResolver(String pkg) {
48 this.pkg = pkg;
49 }
50
51 public Class<?> resolve(String name) throws ClassNotFoundException {
52 return Class.forName(pkg + name);
53 }
54 }
55
56
57 public static class ImplicitImportResolver implements Resolver {
58 public Class<?> resolve(String name) throws ClassNotFoundException {
59 return Class.forName("java.lang." + name);
60 }
61 }
62
63 public static class ImportOnDemandResolver implements Resolver {
64 private Set<String> importStmts;
65
66 public ImportOnDemandResolver(Set<String> importStmts) {
67 this.importStmts = importStmts;
68 }
69
70 public Class<?> resolve(String name) throws ClassNotFoundException {
71 for (String importStmt : importStmts) {
72 if (importStmt.endsWith("*")) {
73 try {
74 String importPkg = importStmt.substring(0, importStmt.indexOf('*') - 1);
75 return Class.forName(importPkg + '.' + name);
76 } catch (ClassNotFoundException cnfe) {
77 }
78 }
79 }
80 throw new ClassNotFoundException("Type " + name + " not found");
81 }
82 }
83
84 public static class PrimitiveTypeResolver implements Resolver {
85 private Map<String, Class<?>> primitiveTypes = new HashMap<String, Class<?>>();
86
87 @SuppressWarnings("PMD.AvoidUsingShortType")
88 public PrimitiveTypeResolver() {
89 primitiveTypes.put("int", int.class);
90 primitiveTypes.put("float", float.class);
91 primitiveTypes.put("double", double.class);
92 primitiveTypes.put("long", long.class);
93 primitiveTypes.put("boolean", boolean.class);
94 primitiveTypes.put("byte", byte.class);
95 primitiveTypes.put("short", short.class);
96 primitiveTypes.put("char", char.class);
97 }
98
99 public Class<?> resolve(String name) throws ClassNotFoundException {
100 if (!primitiveTypes.containsKey(name)) {
101 throw new ClassNotFoundException();
102 }
103 return primitiveTypes.get(name);
104 }
105 }
106
107 public static class VoidResolver implements Resolver {
108 public Class<?> resolve(String name) throws ClassNotFoundException {
109 if (name.equals("void")) {
110 return void.class;
111 }
112 throw new ClassNotFoundException();
113 }
114 }
115
116 public static class FullyQualifiedNameResolver implements Resolver {
117 public Class<?> resolve(String name) throws ClassNotFoundException {
118 return Class.forName(name);
119 }
120 }
121
122 private String pkg;
123 private Set<String> imports = new HashSet<String>();
124 private List<Resolver> resolvers = new ArrayList<Resolver>();
125
126 public void setASTCompilationUnitPackage(String pkg) {
127 this.pkg = pkg;
128 }
129
130 public String getASTCompilationUnitPackage() {
131 return pkg;
132 }
133
134 public void addImport(String importString) {
135 imports.add(importString);
136 }
137
138 public int getImportsCount() {
139 return imports.size();
140 }
141
142 public Class<?> findClass(String name) throws ClassNotFoundException {
143
144 if (resolvers.isEmpty()) {
145 buildResolvers();
146 }
147
148 for (Resolver resolver : resolvers) {
149 try {
150 return resolver.resolve(name);
151 } catch (ClassNotFoundException cnfe) {
152 }
153 }
154
155 throw new ClassNotFoundException("Type " + name + " not found");
156 }
157
158 private void buildResolvers() {
159 resolvers.add(new PrimitiveTypeResolver());
160 resolvers.add(new VoidResolver());
161 resolvers.add(new ExplicitImportResolver(imports));
162 resolvers.add(new CurrentPackageResolver(pkg));
163 resolvers.add(new ImplicitImportResolver());
164 resolvers.add(new ImportOnDemandResolver(imports));
165 resolvers.add(new FullyQualifiedNameResolver());
166 }
167
168 }