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1   /*
2    * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package com.sun.tools.corba.se.idl.toJavaPortable ;
27  
28  import com.sun.tools.corba.se.idl.toJavaPortable.NameModifier ;
29  
30  public class NameModifierImpl implements NameModifier {
31      private String prefix ;
32      private String suffix ;
33  
34      public NameModifierImpl( )
35      {
36          this.prefix = null ;
37          this.suffix = null ;
38      }
39  
40      public NameModifierImpl( String prefix, String suffix )
41      {
42          this.prefix = prefix ;
43          this.suffix = suffix ;
44      }
45  
46      /** Construct a NameModifier from a pattern of the form xxx%xxx.
47      * The pattern must consist of characters chosen from the
48      * set [A-Za-z0-9%$_]. In addition, the pattern must contain
49      * exactly one % character.  Finally, if % is not the first char in
50      * the pattern, the pattern must not start with a number.
51      * <p>
52      * The semantics of makeName are very simply: just replace the
53      * % character with the base in the pattern and return the result.
54      */
55      public NameModifierImpl( String pattern )
56      {
57          int first = pattern.indexOf( '%' ) ;
58          int last  = pattern.lastIndexOf( '%' ) ;
59  
60          if (first != last)
61              throw new IllegalArgumentException(
62                  Util.getMessage( "NameModifier.TooManyPercent" ) ) ;
63  
64          if (first == -1)
65              throw new IllegalArgumentException(
66                  Util.getMessage( "NameModifier.NoPercent" ) ) ;
67  
68          for (int ctr = 0; ctr<pattern.length(); ctr++) {
69              char ch = pattern.charAt( ctr ) ;
70              if (invalidChar( ch, ctr==0 )) {
71                  char[] chars = new char[] { ch } ;
72                  throw new IllegalArgumentException(
73                      Util.getMessage( "NameModifier.InvalidChar",
74                          new String( chars )) ) ;
75              }
76          }
77  
78          // at this point, 0 <= first && first < pattern.length()
79          prefix = pattern.substring( 0, first ) ;
80          suffix = pattern.substring( first+1 ) ;
81      }
82  
83      /** Return true if ch is invalid as a character in an
84      * identifier.  If ch is a number, it is invalid only if
85      * isFirst is true.
86      */
87      private boolean invalidChar( char ch, boolean isFirst )
88      {
89          if (('A'<=ch) && (ch<='Z'))
90              return false ;
91          else if (('a'<=ch) && (ch<='z'))
92              return false ;
93          else if (('0'<=ch) && (ch<='9'))
94              return isFirst ;
95          else if (ch=='%')
96              return false ;
97          else if (ch=='$')
98              return false ;
99          else if (ch=='_')
100             return false ;
101         else
102             return true ;
103     }
104 
105     public String makeName( String base )
106     {
107         StringBuffer sb = new StringBuffer() ;
108 
109         if (prefix != null)
110             sb.append( prefix ) ;
111 
112         sb.append( base ) ;
113 
114         if (suffix != null)
115             sb.append( suffix ) ;
116 
117         return sb.toString() ;
118     }
119 }