19 * limitations under the License. |
19 * limitations under the License. |
20 */ |
20 */ |
21 |
21 |
22 package com.sun.org.apache.bcel.internal.classfile; |
22 package com.sun.org.apache.bcel.internal.classfile; |
23 |
23 |
24 |
24 import java.io.ByteArrayInputStream; |
25 import com.sun.org.apache.bcel.internal.Constants; |
25 import java.io.DataInput; |
26 import java.io.*; |
26 import java.io.DataOutputStream; |
|
27 import java.io.IOException; |
|
28 |
|
29 import com.sun.org.apache.bcel.internal.Const; |
27 |
30 |
28 /** |
31 /** |
29 * This class is derived from <em>Attribute</em> and represents a reference |
32 * This class is derived from <em>Attribute</em> and represents a reference |
30 * to a <href="http://wwwipd.ira.uka.de/~pizza/gj/">GJ</a> attribute. |
33 * to a GJ attribute. |
31 * |
34 * |
32 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
35 * @version $Id: Signature.java 1749603 2016-06-21 20:50:19Z ggregory $ |
33 * @see Attribute |
36 * @see Attribute |
34 */ |
37 */ |
35 public final class Signature extends Attribute { |
38 public final class Signature extends Attribute { |
36 private int signature_index; |
39 |
37 |
40 private int signature_index; |
38 /** |
41 |
39 * Initialize from another object. Note that both objects use the same |
42 |
40 * references (shallow copy). Use clone() for a physical copy. |
43 /** |
41 */ |
44 * Initialize from another object. Note that both objects use the same |
42 public Signature(Signature c) { |
45 * references (shallow copy). Use clone() for a physical copy. |
43 this(c.getNameIndex(), c.getLength(), c.getSignatureIndex(), c.getConstantPool()); |
46 */ |
44 } |
47 public Signature(final Signature c) { |
45 |
48 this(c.getNameIndex(), c.getLength(), c.getSignatureIndex(), c.getConstantPool()); |
46 /** |
49 } |
47 * Construct object from file stream. |
50 |
48 * @param name_index Index in constant pool to CONSTANT_Utf8 |
51 |
49 * @param length Content length in bytes |
52 /** |
50 * @param file Input stream |
53 * Construct object from file stream. |
51 * @param constant_pool Array of constants |
54 * @param name_index Index in constant pool to CONSTANT_Utf8 |
52 * @throws IOException |
55 * @param length Content length in bytes |
53 */ |
56 * @param input Input stream |
54 Signature(int name_index, int length, DataInputStream file, |
57 * @param constant_pool Array of constants |
55 ConstantPool constant_pool) throws IOException |
58 * @throws IOException |
56 { |
59 */ |
57 this(name_index, length, file.readUnsignedShort(), constant_pool); |
60 Signature(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) |
58 } |
61 throws IOException { |
59 |
62 this(name_index, length, input.readUnsignedShort(), constant_pool); |
60 /** |
63 } |
61 * @param name_index Index in constant pool to CONSTANT_Utf8 |
64 |
62 * @param length Content length in bytes |
65 |
63 * @param constant_pool Array of constants |
66 /** |
64 * @param Signature_index Index in constant pool to CONSTANT_Utf8 |
67 * @param name_index Index in constant pool to CONSTANT_Utf8 |
65 */ |
68 * @param length Content length in bytes |
66 public Signature(int name_index, int length, int signature_index, |
69 * @param signature_index Index in constant pool to CONSTANT_Utf8 |
67 ConstantPool constant_pool) |
70 * @param constant_pool Array of constants |
68 { |
71 */ |
69 super(Constants.ATTR_SIGNATURE, name_index, length, constant_pool); |
72 public Signature(final int name_index, final int length, final int signature_index, final ConstantPool constant_pool) { |
70 this.signature_index = signature_index; |
73 super(Const.ATTR_SIGNATURE, name_index, length, constant_pool); |
71 } |
74 this.signature_index = signature_index; |
72 |
75 } |
73 /** |
76 |
74 * Called by objects that are traversing the nodes of the tree implicitely |
77 |
75 * defined by the contents of a Java class. I.e., the hierarchy of methods, |
78 /** |
76 * fields, attributes, etc. spawns a tree of objects. |
79 * Called by objects that are traversing the nodes of the tree implicitely |
77 * |
80 * defined by the contents of a Java class. I.e., the hierarchy of methods, |
78 * @param v Visitor object |
81 * fields, attributes, etc. spawns a tree of objects. |
79 */ |
82 * |
80 public void accept(Visitor v) { |
83 * @param v Visitor object |
81 System.err.println("Visiting non-standard Signature object"); |
84 */ |
82 v.visitSignature(this); |
85 @Override |
83 } |
86 public void accept( final Visitor v ) { |
84 |
87 //System.err.println("Visiting non-standard Signature object"); |
85 /** |
88 v.visitSignature(this); |
86 * Dump source file attribute to file stream in binary format. |
89 } |
87 * |
90 |
88 * @param file Output file stream |
91 |
89 * @throws IOException |
92 /** |
90 */ |
93 * Dump source file attribute to file stream in binary format. |
91 public final void dump(DataOutputStream file) throws IOException |
94 * |
92 { |
95 * @param file Output file stream |
93 super.dump(file); |
96 * @throws IOException |
94 file.writeShort(signature_index); |
97 */ |
95 } |
98 @Override |
96 |
99 public final void dump( final DataOutputStream file ) throws IOException { |
97 /** |
100 super.dump(file); |
98 * @return Index in constant pool of source file name. |
101 file.writeShort(signature_index); |
99 */ |
102 } |
100 public final int getSignatureIndex() { return signature_index; } |
103 |
101 |
104 |
102 /** |
105 /** |
103 * @param Signature_index. |
106 * @return Index in constant pool of source file name. |
104 */ |
107 */ |
105 public final void setSignatureIndex(int signature_index) { |
108 public final int getSignatureIndex() { |
106 this.signature_index = signature_index; |
109 return signature_index; |
107 } |
110 } |
108 |
111 |
109 /** |
112 |
110 * @return GJ signature. |
113 /** |
111 */ |
114 * @param signature_index the index info the constant pool of this signature |
112 public final String getSignature() { |
115 */ |
113 ConstantUtf8 c = (ConstantUtf8)constant_pool.getConstant(signature_index, |
116 public final void setSignatureIndex( final int signature_index ) { |
114 Constants.CONSTANT_Utf8); |
117 this.signature_index = signature_index; |
115 return c.getBytes(); |
118 } |
116 } |
119 |
117 |
120 |
118 /** |
121 /** |
119 * Extends ByteArrayInputStream to make 'unreading' chars possible. |
122 * @return GJ signature. |
120 */ |
123 */ |
121 private static final class MyByteArrayInputStream extends ByteArrayInputStream { |
124 public final String getSignature() { |
122 MyByteArrayInputStream(String data) { super(data.getBytes()); } |
125 final ConstantUtf8 c = (ConstantUtf8) super.getConstantPool().getConstant(signature_index, |
123 final int mark() { return pos; } |
126 Const.CONSTANT_Utf8); |
124 final String getData() { return new String(buf); } |
127 return c.getBytes(); |
125 final void reset(int p) { pos = p; } |
128 } |
126 final void unread() { if(pos > 0) pos--; } |
129 |
127 } |
130 /** |
128 |
131 * Extends ByteArrayInputStream to make 'unreading' chars possible. |
129 private static boolean identStart(int ch) { |
132 */ |
130 return ch == 'T' || ch == 'L'; |
133 private static final class MyByteArrayInputStream extends ByteArrayInputStream { |
131 } |
134 |
132 |
135 MyByteArrayInputStream(final String data) { |
133 private static boolean identPart(int ch) { |
136 super(data.getBytes()); |
134 return ch == '/' || ch == ';'; |
137 } |
135 } |
138 |
136 |
139 |
137 private static final void matchIdent(MyByteArrayInputStream in, StringBuffer buf) { |
140 final String getData() { |
138 int ch; |
141 return new String(buf); |
139 |
142 } |
140 if((ch = in.read()) == -1) |
143 |
141 throw new RuntimeException("Illegal signature: " + in.getData() + |
144 |
142 " no ident, reaching EOF"); |
145 final void unread() { |
143 |
146 if (pos > 0) { |
144 //System.out.println("return from ident:" + (char)ch); |
147 pos--; |
145 |
148 } |
146 if(!identStart(ch)) { |
149 } |
147 StringBuffer buf2 = new StringBuffer(); |
150 } |
148 |
151 |
149 int count = 1; |
152 |
150 while(Character.isJavaIdentifierPart((char)ch)) { |
153 private static boolean identStart( final int ch ) { |
151 buf2.append((char)ch); |
154 return ch == 'T' || ch == 'L'; |
152 count++; |
155 } |
|
156 |
|
157 |
|
158 private static void matchIdent( final MyByteArrayInputStream in, final StringBuilder buf ) { |
|
159 int ch; |
|
160 if ((ch = in.read()) == -1) { |
|
161 throw new RuntimeException("Illegal signature: " + in.getData() |
|
162 + " no ident, reaching EOF"); |
|
163 } |
|
164 //System.out.println("return from ident:" + (char)ch); |
|
165 if (!identStart(ch)) { |
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166 final StringBuilder buf2 = new StringBuilder(); |
|
167 int count = 1; |
|
168 while (Character.isJavaIdentifierPart((char) ch)) { |
|
169 buf2.append((char) ch); |
|
170 count++; |
|
171 ch = in.read(); |
|
172 } |
|
173 if (ch == ':') { // Ok, formal parameter |
|
174 in.skip("Ljava/lang/Object".length()); |
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175 buf.append(buf2); |
|
176 ch = in.read(); |
|
177 in.unread(); |
|
178 //System.out.println("so far:" + buf2 + ":next:" +(char)ch); |
|
179 } else { |
|
180 for (int i = 0; i < count; i++) { |
|
181 in.unread(); |
|
182 } |
|
183 } |
|
184 return; |
|
185 } |
|
186 final StringBuilder buf2 = new StringBuilder(); |
153 ch = in.read(); |
187 ch = in.read(); |
154 } |
188 do { |
155 |
189 buf2.append((char) ch); |
156 if(ch == ':') { // Ok, formal parameter |
190 ch = in.read(); |
157 in.skip("Ljava/lang/Object".length()); |
191 //System.out.println("within ident:"+ (char)ch); |
158 buf.append(buf2); |
192 } while ((ch != -1) && (Character.isJavaIdentifierPart((char) ch) || (ch == '/'))); |
159 |
193 buf.append(buf2.toString().replace('/', '.')); |
|
194 //System.out.println("regular return ident:"+ (char)ch + ":" + buf2); |
|
195 if (ch != -1) { |
|
196 in.unread(); |
|
197 } |
|
198 } |
|
199 |
|
200 |
|
201 private static void matchGJIdent( final MyByteArrayInputStream in, final StringBuilder buf ) { |
|
202 int ch; |
|
203 matchIdent(in, buf); |
160 ch = in.read(); |
204 ch = in.read(); |
161 in.unread(); |
205 if ((ch == '<') || ch == '(') { // Parameterized or method |
162 //System.out.println("so far:" + buf2 + ":next:" +(char)ch); |
206 //System.out.println("Enter <"); |
163 } else { |
207 buf.append((char) ch); |
164 for(int i=0; i < count; i++) |
208 matchGJIdent(in, buf); |
165 in.unread(); |
209 while (((ch = in.read()) != '>') && (ch != ')')) { // List of parameters |
166 } |
210 if (ch == -1) { |
167 |
211 throw new RuntimeException("Illegal signature: " + in.getData() |
168 return; |
212 + " reaching EOF"); |
169 } |
213 } |
170 |
214 //System.out.println("Still no >"); |
171 StringBuffer buf2 = new StringBuffer(); |
215 buf.append(", "); |
172 ch = in.read(); |
216 in.unread(); |
173 |
217 matchGJIdent(in, buf); // Recursive call |
174 do { |
218 } |
175 buf2.append((char)ch); |
219 //System.out.println("Exit >"); |
176 ch = in.read(); |
220 buf.append((char) ch); |
177 //System.out.println("within ident:"+ (char)ch); |
221 } else { |
178 |
222 in.unread(); |
179 } while((ch != -1) && (Character.isJavaIdentifierPart((char)ch) || (ch == '/'))); |
223 } |
180 |
224 ch = in.read(); |
181 buf.append(buf2.toString().replace('/', '.')); |
225 if (identStart(ch)) { |
182 |
226 in.unread(); |
183 //System.out.println("regular return ident:"+ (char)ch + ":" + buf2); |
227 matchGJIdent(in, buf); |
184 |
228 } else if (ch == ')') { |
185 if(ch != -1) |
229 in.unread(); |
186 in.unread(); |
230 return; |
187 } |
231 } else if (ch != ';') { |
188 |
232 throw new RuntimeException("Illegal signature: " + in.getData() + " read " + (char) ch); |
189 private static final void matchGJIdent(MyByteArrayInputStream in, |
233 } |
190 StringBuffer buf) |
234 } |
191 { |
235 |
192 int ch; |
236 |
193 |
237 public static String translate( final String s ) { |
194 matchIdent(in, buf); |
238 //System.out.println("Sig:" + s); |
195 |
239 final StringBuilder buf = new StringBuilder(); |
196 ch = in.read(); |
240 matchGJIdent(new MyByteArrayInputStream(s), buf); |
197 if((ch == '<') || ch == '(') { // Parameterized or method |
241 return buf.toString(); |
198 //System.out.println("Enter <"); |
242 } |
199 buf.append((char)ch); |
243 |
200 matchGJIdent(in, buf); |
244 |
201 |
245 // @since 6.0 is no longer final |
202 while(((ch = in.read()) != '>') && (ch != ')')) { // List of parameters |
246 public static boolean isFormalParameterList( final String s ) { |
203 if(ch == -1) |
247 return s.startsWith("<") && (s.indexOf(':') > 0); |
204 throw new RuntimeException("Illegal signature: " + in.getData() + |
248 } |
205 " reaching EOF"); |
249 |
206 |
250 |
207 //System.out.println("Still no >"); |
251 // @since 6.0 is no longer final |
208 buf.append(", "); |
252 public static boolean isActualParameterList( final String s ) { |
209 in.unread(); |
253 return s.startsWith("L") && s.endsWith(">;"); |
210 matchGJIdent(in, buf); // Recursive call |
254 } |
211 } |
255 |
212 |
256 |
213 //System.out.println("Exit >"); |
257 /** |
214 |
258 * @return String representation |
215 buf.append((char)ch); |
259 */ |
216 } else |
260 @Override |
217 in.unread(); |
261 public final String toString() { |
218 |
262 final String s = getSignature(); |
219 ch = in.read(); |
263 return "Signature: " + s; |
220 if(identStart(ch)) { |
264 } |
221 in.unread(); |
265 |
222 matchGJIdent(in, buf); |
266 |
223 } else if(ch == ')') { |
267 /** |
224 in.unread(); |
268 * @return deep copy of this attribute |
225 return; |
269 */ |
226 } else if(ch != ';') |
270 @Override |
227 throw new RuntimeException("Illegal signature: " + in.getData() + " read " + |
271 public Attribute copy( final ConstantPool _constant_pool ) { |
228 (char)ch); |
272 return (Attribute) clone(); |
229 } |
273 } |
230 |
|
231 public static String translate(String s) { |
|
232 //System.out.println("Sig:" + s); |
|
233 StringBuffer buf = new StringBuffer(); |
|
234 |
|
235 matchGJIdent(new MyByteArrayInputStream(s), buf); |
|
236 |
|
237 return buf.toString(); |
|
238 } |
|
239 |
|
240 public static final boolean isFormalParameterList(String s) { |
|
241 return s.startsWith("<") && (s.indexOf(':') > 0); |
|
242 } |
|
243 |
|
244 public static final boolean isActualParameterList(String s) { |
|
245 return s.startsWith("L") && s.endsWith(">;"); |
|
246 } |
|
247 |
|
248 /** |
|
249 * @return String representation |
|
250 */ |
|
251 public final String toString() { |
|
252 String s = getSignature(); |
|
253 |
|
254 return "Signature(" + s + ")"; |
|
255 } |
|
256 |
|
257 /** |
|
258 * @return deep copy of this attribute |
|
259 */ |
|
260 public Attribute copy(ConstantPool constant_pool) { |
|
261 return (Signature)clone(); |
|
262 } |
|
263 } |
274 } |