Mercurial > hg > blitz_condensed
comparison src/com/go/trove/classfile/MethodDescriptor.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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-1:000000000000 | 0:3dc0c5604566 |
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1 /* ==================================================================== | |
2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group | |
3 * ==================================================================== | |
4 * The Tea Software License, Version 1.1 | |
5 * | |
6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. | |
7 * | |
8 * Redistribution and use in source and binary forms, with or without | |
9 * modification, are permitted provided that the following conditions | |
10 * are met: | |
11 * | |
12 * 1. Redistributions of source code must retain the above copyright | |
13 * notice, this list of conditions and the following disclaimer. | |
14 * | |
15 * 2. Redistributions in binary form must reproduce the above copyright | |
16 * notice, this list of conditions and the following disclaimer in | |
17 * the documentation and/or other materials provided with the | |
18 * distribution. | |
19 * | |
20 * 3. The end-user documentation included with the redistribution, | |
21 * if any, must include the following acknowledgment: | |
22 * "This product includes software developed by the | |
23 * Walt Disney Internet Group (http://opensource.go.com/)." | |
24 * Alternately, this acknowledgment may appear in the software itself, | |
25 * if and wherever such third-party acknowledgments normally appear. | |
26 * | |
27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must | |
28 * not be used to endorse or promote products derived from this | |
29 * software without prior written permission. For written | |
30 * permission, please contact opensource@dig.com. | |
31 * | |
32 * 5. Products derived from this software may not be called "Tea", | |
33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", | |
34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior | |
35 * written permission of the Walt Disney Internet Group. | |
36 * | |
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED | |
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS | |
41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
48 * ==================================================================== | |
49 * | |
50 * For more information about Tea, please see http://opensource.go.com/. | |
51 */ | |
52 | |
53 package com.go.trove.classfile; | |
54 | |
55 import java.util.List; | |
56 import java.util.ArrayList; | |
57 | |
58 /****************************************************************************** | |
59 * This class is used to build method descriptor strings as | |
60 * defined in <i>The Java Virtual Machine Specification</i>, section 4.3.3. | |
61 * | |
62 * @author Brian S O'Neill | |
63 * @version | |
64 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 9/07/00 <!-- $--> | |
65 */ | |
66 public class MethodDescriptor extends Descriptor { | |
67 private static TypeDescriptor[] cEmptyParams = new TypeDescriptor[0]; | |
68 | |
69 private String mStr; | |
70 private TypeDescriptor mRetType; | |
71 private TypeDescriptor[] mParams; | |
72 | |
73 public MethodDescriptor() { | |
74 this(null, null); | |
75 } | |
76 | |
77 /** | |
78 * Used to construct a method descriptor for a method with a return | |
79 * type and parameters. | |
80 */ | |
81 public MethodDescriptor(TypeDescriptor ret, TypeDescriptor[] params) { | |
82 if (params == null) { | |
83 params = cEmptyParams; | |
84 } | |
85 | |
86 mStr = generate(ret, params); | |
87 mRetType = ret; | |
88 mParams = params; | |
89 } | |
90 | |
91 public TypeDescriptor getReturnType() { | |
92 return mRetType; | |
93 } | |
94 | |
95 public int getParameterCount() { | |
96 return mParams.length; | |
97 } | |
98 | |
99 public TypeDescriptor[] getParameterTypes() { | |
100 return mParams; | |
101 } | |
102 | |
103 public String toString() { | |
104 return mStr; | |
105 } | |
106 | |
107 public static String generate() { | |
108 return generate(null, null); | |
109 } | |
110 | |
111 /** | |
112 * Used to generate a method descriptor for a method with a return | |
113 * type and parameters. | |
114 */ | |
115 public static String generate(TypeDescriptor ret, | |
116 TypeDescriptor[] params) { | |
117 | |
118 StringBuffer desc = new StringBuffer(20); | |
119 | |
120 desc.append('('); | |
121 | |
122 if (params != null) { | |
123 for (int i=0; i<params.length; i++) { | |
124 desc.append(params[i]); | |
125 } | |
126 } | |
127 | |
128 desc.append(')'); | |
129 | |
130 if (ret == null) ret = new TypeDescriptor(Void.TYPE); | |
131 desc.append(ret); | |
132 | |
133 return desc.toString(); | |
134 } | |
135 | |
136 public static MethodDescriptor parseMethodDesc(String desc) | |
137 throws IllegalArgumentException { | |
138 | |
139 MethodDescriptor md; | |
140 int cursor = 0; | |
141 try { | |
142 char c; | |
143 | |
144 if ((c = desc.charAt(cursor++)) != '(') { | |
145 throw new IllegalArgumentException | |
146 ("Invalid descriptor: " + desc); | |
147 } | |
148 | |
149 StringBuffer buf = new StringBuffer(); | |
150 List list = new ArrayList(); | |
151 | |
152 while ((c = desc.charAt(cursor++)) != ')') { | |
153 switch (c) { | |
154 case 'V': | |
155 case 'I': | |
156 case 'C': | |
157 case 'Z': | |
158 case 'D': | |
159 case 'F': | |
160 case 'J': | |
161 case 'B': | |
162 case 'S': | |
163 buf.append(c); | |
164 break; | |
165 case '[': | |
166 buf.append(c); | |
167 continue; | |
168 case 'L': | |
169 while (true) { | |
170 buf.append(c); | |
171 if (c == ';') { | |
172 break; | |
173 } | |
174 c = desc.charAt(cursor++); | |
175 } | |
176 break; | |
177 default: | |
178 throw new IllegalArgumentException | |
179 ("Invalid descriptor: " + desc); | |
180 } | |
181 | |
182 list.add(TypeDescriptor.parseTypeDesc(buf.toString())); | |
183 buf.setLength(0); | |
184 } | |
185 | |
186 TypeDescriptor ret = | |
187 TypeDescriptor.parseTypeDesc(desc.substring(cursor)); | |
188 | |
189 TypeDescriptor[] tds = new TypeDescriptor[list.size()]; | |
190 tds = (TypeDescriptor[])list.toArray(tds); | |
191 | |
192 md = new MethodDescriptor(ret, tds); | |
193 } | |
194 catch (NullPointerException e) { | |
195 throw new IllegalArgumentException("Invalid descriptor: " + desc); | |
196 } | |
197 catch (IndexOutOfBoundsException e) { | |
198 throw new IllegalArgumentException("Invalid descriptor: " + desc); | |
199 } | |
200 | |
201 return md; | |
202 } | |
203 } |