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Java > Open Source Codes > jbet > cmd > delete


1 /*
2  * JBET - Java Binary Enhancement Tool
3  * Copyright (c) 2003 Networks Associates Technology, Inc.
4  *
5  * This software was developed under DARPA/SPAWAR contract
6  * N66001-00-C-8602 "SPMA" as part of the
7  * DARPA OASIS research program.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in the
16  * documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30
31 /*
32    Command object called by Jbet.doCommands().
33    run() parses the input using the supplied lexer.
34 */
35
36 package jbet.cmd;
37 import jbet.*;
38 import java.io.*;
39 import java.util.*;
40
41 class delete implements Command
42 {
43     public int helplevel() { return 1; }
44     public String JavaDoc shorthelp() { return "delete a method or field from a class"; }
45     public String JavaDoc longhelp() {
46     return
47         "jbet delete <class>.<field>\t\t\n"; }
48
49     public void run (Lexer lexer) throws Exception JavaDoc
50     {
51     lexer.match(Token.END_OF_OPTS);
52     Thing t = lexer.parse_element_with_default (Jbet.default_class, true);
53     lexer.term();
54     dodelete (t.cls, t.name, t.elem);
55     }
56
57     //delete something
58 void dodelete(String JavaDoc cname, String JavaDoc mname, String JavaDoc type) throws Exception JavaDoc {
59     ClassInfo cr = Jbet.loader.getClass(cname);
60     MethodInfo mi = cr.findMethod(mname, type);
61     if (mi != null) {
62         cr.removeMethod (mi);
63         Jbet.info.println("removed method " +
64              Util.methString(cname, mname, mi.descriptor.toString()));
65         cr.setDirty();
66         return;
67     }
68     FieldInfo fi = cr.findField(mname);
69     if (fi != null) {
70         cr.removeField(fi);
71         Jbet.info.println("removed field " + cname + "." + mname);
72         cr.setDirty();
73         return;
74     }
75     throw new GlobalException (cname + " has no member named " + mname +
76                    ((type==null) ? "" : (":" + type)) );
77     }
78 }
79
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