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1 package com.sun.org.apache.bcel.internal.generic;
2
3
56
57 import com.sun.org.apache.bcel.internal.Constants;
58 import com.sun.org.apache.bcel.internal.classfile.*;
59 import java.io.*;
60 import java.util.ArrayList  ;
61
62
69 public abstract class Type {
70 protected byte type;
71 protected String signature;
73
75 public static final BasicType VOID = new BasicType(Constants.T_VOID);
76 public static final BasicType BOOLEAN = new BasicType(Constants.T_BOOLEAN);
77 public static final BasicType INT = new BasicType(Constants.T_INT);
78 public static final BasicType SHORT = new BasicType(Constants.T_SHORT);
79 public static final BasicType BYTE = new BasicType(Constants.T_BYTE);
80 public static final BasicType LONG = new BasicType(Constants.T_LONG);
81 public static final BasicType DOUBLE = new BasicType(Constants.T_DOUBLE);
82 public static final BasicType FLOAT = new BasicType(Constants.T_FLOAT);
83 public static final BasicType CHAR = new BasicType(Constants.T_CHAR);
84 public static final ObjectType OBJECT = new ObjectType("java.lang.Object");
85 public static final ObjectType STRING = new ObjectType("java.lang.String");
86 public static final ObjectType STRINGBUFFER = new ObjectType("java.lang.StringBuffer");
87 public static final ObjectType THROWABLE = new ObjectType("java.lang.Throwable");
88 public static final Type[] NO_ARGS = new Type[0];
89 public static final ReferenceType NULL = new ReferenceType();
90 public static final Type UNKNOWN = new Type(Constants.T_UNKNOWN,
91 "<unknown object>"){};
92
93 protected Type(byte t, String s) {
94 type = t;
95 signature = s;
96 }
97
98
101 public String getSignature() { return signature; }
102
103
106 public byte getType() { return type; }
107
108
111 public int getSize() {
112 switch(type) {
113 case Constants.T_DOUBLE:
114 case Constants.T_LONG: return 2;
115 case Constants.T_VOID: return 0;
116 default: return 1;
117 }
118 }
119
120
123 public String toString() {
124 return ((this.equals(Type.NULL) || (type >= Constants.T_UNKNOWN)))? signature :
125 Utility.signatureToString(signature, false);
126 }
127
128
136 public static String getMethodSignature(Type return_type, Type[] arg_types) {
137 StringBuffer buf = new StringBuffer ("(");
138 int length = (arg_types == null)? 0 : arg_types.length;
139
140 for(int i=0; i < length; i++)
141 buf.append(arg_types[i].getSignature());
142
143 buf.append(')');
144 buf.append(return_type.getSignature());
145
146 return buf.toString();
147 }
148
149 private static int consumed_chars=0;
151
156 public static final Type getType(String signature)
157 throws StringIndexOutOfBoundsException
158 {
159 byte type = Utility.typeOfSignature(signature);
160
161 if(type <= Constants.T_VOID) {
162 consumed_chars = 1;
163 return BasicType.getType(type);
164 } else if(type == Constants.T_ARRAY) {
165 int dim=0;
166 do { dim++;
168 } while(signature.charAt(dim) == '[');
169
170 Type t = getType(signature.substring(dim));
172
173 consumed_chars += dim;
175 return new ArrayType(t, dim);
176 } else { int index = signature.indexOf(';');
179 if(index < 0)
180 throw new ClassFormatError ("Invalid signature: " + signature);
181
182 consumed_chars = index + 1;
184 return new ObjectType(signature.substring(1, index).replace('/', '.'));
185 }
186 }
187
188
194 public static Type getReturnType(String signature) {
195 try {
196 int index = signature.lastIndexOf(')') + 1;
198 return getType(signature.substring(index));
199 } catch(StringIndexOutOfBoundsException e) { throw new ClassFormatError ("Invalid method signature: " + signature);
201 }
202 }
203
204
209 public static Type[] getArgumentTypes(String signature) {
210 ArrayList vec = new ArrayList ();
211 int index;
212 Type[] types;
213
214 try { if(signature.charAt(0) != '(')
216 throw new ClassFormatError ("Invalid method signature: " + signature);
217
218 index = 1;
220 while(signature.charAt(index) != ')') {
221 vec.add(getType(signature.substring(index)));
222 index += consumed_chars; }
224 } catch(StringIndexOutOfBoundsException e) { throw new ClassFormatError ("Invalid method signature: " + signature);
226 }
227
228 types = new Type[vec.size()];
229 vec.toArray(types);
230 return types;
231 }
232 }
233 |
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