1 cananian 1.1.4.1 // UniqueName.java, created Mon Jan 10 22:00:06 2000 by cananian
2 cananian 1.1.4.2 // Copyright (C) 2000 C. Scott Ananian <cananian@alumni.princeton.edu>
3 cananian 1.1.4.1 // Licensed under the terms of the GNU GPL; see COPYING for details.
4 cananian 1.1.4.1 package harpoon.ClassFile;
5 cananian 1.1.4.1
6 cananian 1.1.4.1 import java.util.HashMap;
7 cananian 1.1.4.1 import java.util.Map;
8 cananian 1.1.4.1 /**
9 cananian 1.1.4.1 * <code>UniqueName</code> contains methods to create unique class,
10 cananian 1.1.4.1 * field, or method names.
11 cananian 1.1.4.1 *
12 cananian 1.1.4.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu>
13 cananian 1.2 * @version $Id: UniqueName.java,v 1.2 2002/02/25 21:03:04 cananian Exp $
14 cananian 1.1.4.1 */
15 cananian 1.1.4.1 public abstract class UniqueName {
16 cananian 1.1.4.1 private final static Map suffixMap = new HashMap(); // efficiency hack.
17 cananian 1.1.4.1
18 cananian 1.1.4.1 /** Make a unique class name from a given suggestion.
19 cananian 1.1.4.1 * The suggestion string may be null or empty.
20 cananian 1.1.4.1 */
21 cananian 1.1.4.1 public static String uniqueClassName(String suggestion, Linker context) {
22 cananian 1.1.4.1 if (suggestion==null || suggestion.equals("")) suggestion="FLEXc";
23 cananian 1.1.4.1 // remove trailing dollar-signs.
24 cananian 1.1.4.1 while (suggestion.charAt(suggestion.length()-1)=='$')
25 cananian 1.1.4.1 suggestion = suggestion.substring(0, suggestion.length()-1);
26 cananian 1.1.4.1 // remove anything after a double dollar sign.
27 cananian 1.1.4.1 if (suggestion.indexOf("$$")!=-1)
28 cananian 1.1.4.1 suggestion = suggestion.substring(0, suggestion.lastIndexOf("$$"));
29 cananian 1.1.4.1 // try unadorned name & return it if unique.
30 cananian 1.1.4.1 try { context.forName(suggestion); }
31 cananian 1.1.4.1 catch (NoSuchClassException e) { return suggestion; }
32 cananian 1.1.4.1 // find lowest unique number for class.
33 cananian 1.1.4.1 // the goal here is determinism. the suffixMap makes it efficient.
34 cananian 1.1.4.1 Integer lastsuffix = (Integer) suffixMap.get(suggestion);
35 cananian 1.1.4.1 for (int i=(lastsuffix==null)?0:(lastsuffix.intValue()+1); true; i++) {
36 cananian 1.1.4.1 String className = suggestion + "$$" + i;
37 cananian 1.1.4.1 try { context.forName(className); }
38 cananian 1.1.4.1 catch (NoSuchClassException e) {
39 cananian 1.1.4.1 suffixMap.put(suggestion, new Integer(i));
40 cananian 1.1.4.1 return className;
41 cananian 1.1.4.1 }
42 cananian 1.1.4.1 }
43 cananian 1.1.4.1 }
44 cananian 1.1.4.1
45 cananian 1.1.4.1 /** Make a unique field name from a given suggestion.
46 cananian 1.1.4.1 * The suggestion string may be null or empty.
47 cananian 1.1.4.1 */
48 cananian 1.1.4.1 public static String uniqueFieldName(String suggestion, HClass context)
49 cananian 1.1.4.1 {
50 cananian 1.1.4.1 if (suggestion==null || suggestion.equals("")) suggestion="FLEXm";
51 cananian 1.1.4.1 // remove trailing dollar-signs.
52 cananian 1.1.4.1 while (suggestion.charAt(suggestion.length()-1)=='$')
53 cananian 1.1.4.1 suggestion = suggestion.substring(0, suggestion.length()-1);
54 cananian 1.1.4.1 // remove anything after a double dollar sign.
55 cananian 1.1.4.1 if (suggestion.indexOf("$$")!=-1)
56 cananian 1.1.4.1 suggestion = suggestion.substring(0, suggestion.lastIndexOf("$$"));
57 cananian 1.1.4.1 // find lowest unique number for method.
58 cananian 1.1.4.1 L1:
59 cananian 1.1.4.1 for (int i=-1; true; i++) {
60 cananian 1.1.4.1 String fieldname = (i<0)?suggestion:(suggestion+"$$"+i);
61 cananian 1.1.4.1 // search class for existing method.
62 cananian 1.1.4.1 HField[] hf = context.getDeclaredFields();
63 cananian 1.1.4.1 for (int j=0; j<hf.length; j++)
64 cananian 1.1.4.1 if (hf[j].getName().equals(fieldname))
65 cananian 1.1.4.1 continue L1;
66 cananian 1.1.4.1 // found a valid name.
67 cananian 1.1.4.1 return fieldname;
68 cananian 1.1.4.1 }
69 cananian 1.1.4.1 }
70 cananian 1.1.4.1
71 cananian 1.1.4.1 /** Make a unique method name from a given suggestion.
72 cananian 1.1.4.1 * The suggestion string may be null or empty.
73 cananian 1.1.4.1 */
74 cananian 1.1.4.1 public static String uniqueMethodName(String suggestion, HClass context)
75 cananian 1.1.4.1 {
76 cananian 1.1.4.1 if (suggestion==null || suggestion.equals("")) suggestion="FLEXm";
77 cananian 1.1.4.1 // remove trailing dollar-signs.
78 cananian 1.1.4.1 while (suggestion.charAt(suggestion.length()-1)=='$')
79 cananian 1.1.4.1 suggestion = suggestion.substring(0, suggestion.length()-1);
80 cananian 1.1.4.1 // remove anything after a double dollar sign.
81 cananian 1.1.4.1 if (suggestion.indexOf("$$")!=-1)
82 cananian 1.1.4.1 suggestion = suggestion.substring(0, suggestion.lastIndexOf("$$"));
83 cananian 1.1.4.1 // find lowest unique number for method.
84 cananian 1.1.4.1 L1:
85 cananian 1.1.4.1 for (int i=-1; true; i++) {
86 cananian 1.1.4.1 String methodname = (i<0)?suggestion:(suggestion+"$$"+i);
87 cananian 1.1.4.1 // search class for existing method.
88 cananian 1.1.4.1 HMethod[] hm = context.getDeclaredMethods();
89 cananian 1.1.4.1 for (int j=0; j<hm.length; j++)
90 cananian 1.1.4.1 if (hm[j].getName().equals(methodname)
91 cananian 1.1.4.1 /* && hm[j].getDescriptor().equals(descriptor)*/)
92 cananian 1.1.4.1 continue L1;
93 cananian 1.1.4.1 // found a valid name.
94 cananian 1.1.4.1 return methodname;
95 cananian 1.1.4.1 }
96 cananian 1.1.4.1 }
97 cananian 1.1.4.1 }
98 cananian 1.1.4.1
99 cananian 1.1.4.1 // set emacs indentation style.
100 cananian 1.1.4.1 // Local Variables:
101 cananian 1.1.4.1 // c-basic-offset:2
102 cananian 1.2 // End: