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1 package alt.jiapi.reflect;
2
3 import java.util.ArrayList  ;
4
9 class TypeHelper {
10 static String typeToDescriptor(String typeName) {
11 int idx = typeName.indexOf('[');
12 String type = null;
13 if (idx == -1) {
14 type = typeName;
15 }
16 else {
17 type = typeName.substring(0, idx).trim();
18 }
19
20 StringBuffer dBuf = new StringBuffer ();
21 if (idx > 0) {
22 for (int i = idx; i < typeName.length(); i++) {
23 if (typeName.charAt(i) == '[') {
24 dBuf.append('[');
25 }
26 }
27 }
28
29 String desc = null;
30 if ("byte".equals(type)) {
32 dBuf.append("B");
33 }
34 else if ("char".equals(type)) {
35 dBuf.append("C");
36 }
37 else if ("double".equals(type)) {
38 dBuf.append("D");
39 }
40 else if ("float".equals(type)) {
41 dBuf.append("F");
42 }
43 else if ("int".equals(type)) {
44 dBuf.append("I");
45 }
46 else if ("long".equals(type)) {
47 dBuf.append("J");
48 }
49 else if ("short".equals(type)) {
50 dBuf.append("S");
51 }
52 else if ("boolean".equals(type)) {
53 dBuf.append("Z");
54 }
55 else if ("void".equals(type)) {
56 dBuf.append("V");
57 }
58 else {
59 dBuf.append('L');
61 dBuf.append(type.replace('.', '/'));
62 dBuf.append(';');
63 }
65
66 return dBuf.toString();
67 }
68
69
70
86 static String descriptorToType(String descriptor) {
87 StringBuffer typeBuf = new StringBuffer ();
88 int i = 0;
89 for(;descriptor.charAt(i) == '['; i++) {
90 typeBuf.append("[]");
91 }
92
93 if (descriptor.charAt(i) == 'L') {
95 String type = descriptor.substring(i + 1, descriptor.length() - 1);
96 typeBuf.insert(0, type.replace('/', '.'));
97 }
98 else if ("B".equals(descriptor)) {
99 typeBuf.insert(0, "byte");
100 }
101 else if ("C".equals(descriptor)) {
102 typeBuf.insert(0, "char");
103 }
104 else if ("D".equals(descriptor)) {
105 typeBuf.insert(0, "double");
106 }
107 else if ("F".equals(descriptor)) {
108 typeBuf.insert(0, "float");
109 }
110 else if ("I".equals(descriptor)) {
111 typeBuf.insert(0, "int");
112 }
113 else if ("J".equals(descriptor)) {
114 typeBuf.insert(0, "long");
115 }
116 else if ("S".equals(descriptor)) {
117 typeBuf.insert(0, "short");
118 }
119 else if ("Z".equals(descriptor)) {
120 typeBuf.insert(0, "boolean");
121 }
122 else if ("V".equals(descriptor)) {
123 return "void";
124 }
125
126 return typeBuf.toString();
127 }
129
130
131 static String [] descriptorsToTypes(String pDesc) {
132 ArrayList al = new ArrayList ();
134 try {
135 for (int i = 0; i < pDesc.length(); i++) {
136 int dim = 0;
137 StringBuffer typeBuf = new StringBuffer ();
138 for(;pDesc.charAt(i) == '['; i++) {
139 typeBuf.append("[]");
140 }
141
142 if (pDesc.charAt(i) != 'L') {
143 String type = descriptorToType("" + pDesc.charAt(i));
144 typeBuf.insert(0, type);
145 al.add(typeBuf.toString());
146 }
147 else {
148 int start = i;
149 for(;pDesc.charAt(i) != ';'; i++) {
150 ;
151 }
152
153 String desc = pDesc.substring(start, i + 1);
154 String typeName = descriptorToType(desc);
155 typeBuf.insert(0, typeName);
156 al.add(typeBuf.toString());
157 }
158 }
159 }
160 catch(IllegalArgumentException iae) {
161 throw new IllegalArgumentException ("Illegal descriptor: " + pDesc);
162 }
163
164 return (String [])al.toArray(new String [0]);
165 }
166
167
168 static String signatureToDescriptor(Signature signature) {
169 StringBuffer desc = new StringBuffer ("(");
170 String typeNames[] = signature.getParameters();
171
172 for (int i = 0; i < typeNames.length; i++) {
173 desc.append(typeToDescriptor(typeNames[i]));
174 }
175 desc.append(")");
176 desc.append(typeToDescriptor(signature.getReturnType()));
177
178 return desc.toString();
179 }
180 }
181 |
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