FieldReshaper


1   /* ====================================================================
2    * Copyright (c) 2002, Hidetoshi Ohuchi <hchacha@users.sourceforge.net>
3    * All rights reserved.
4    *
5    * Redistribution and use in source and binary forms, with or without
6    * modification, are permitted provided that the following conditions
7    * are met:
8    *
9    * Redistributions of source code must retain the above copyright
10   * notice, this list of conditions and the following disclaimer.
11   *
12   * Redistributions in binary form must reproduce the above copyright
13   * notice, this list of conditions and the following disclaimer in the
14   * documentation and/or other materials provided with the distribution.
15   *
16   * Neither the name of the hchacha nor the names of its contributors
17   * may be used to endorse or promote products derived from this
18   * software without specific prior written permission.
19   *
20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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30   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31   * POSSIBILITY OF SUCH DAMAGE.
32   * ====================================================================
33   */
34  package jarg;
35  
36  import org.apache.bcel.classfile.*;
37  import org.apache.bcel.generic.*;
38  import org.apache.bcel.Constants;
39  
40  /**
41   * The class for reshaping fields in the class.
42   *
43   * @version $Id: FieldReshaper.java,v 1.2 2002/03/23 19:38:59 hchacha Exp $
44   * @author Hidetoshi Ohuchi &lt;hchacha@users.sourceforge.net&gt;
45   */
46  class FieldReshaper {
47     private Jarg app;
48     private PackageHandler pkgh;
49  
50     FieldReshaper(Jarg app, PackageHandler pkgh) {
51        this.app = app;
52        this.pkgh = pkgh;
53     }
54  
55     Field reshapeField(JavaClass jcls, ConstantPoolGen cpg0, ClassGen cg, ConstantPoolGen cpg, Field f) {
56        f.setConstantPool(jcls.getConstantPool());
57        FieldGen fg0 = new FieldGen(f, cpg0);
58  
59        String   f_old_class_name = jcls.getClassName();
60        int    f_access_flags = f.getAccessFlags();
61        Type   f_type         = Type.getType(pkgh.convSignature(f.getSignature()));
62        String   f_name         = pkgh.convFieldName(f_old_class_name, f.getName());
63  //      System.out.println(" reshaping field " + f_name);
64  
65        FieldGen fg = new FieldGen(f_access_flags, f_type, f_name, cpg);
66  
67        // setup a initial value
68        if (fg0.isStatic()) {
69           String   ini = fg0.getInitValue();
70           if (ini != null) {
71              reshapeFieldInitVal(fg, f_type, ini);
72           }
73        }
74  
75        // fields attributes
76        {
77           Attribute[] ats = fg0.getAttributes();
78           for (int j=0; j<ats.length; j++) {
79              Attribute at = ats[j];
80              if (at instanceof Synthetic) {
81                 if (!app.isRemoveSynthetic) {
82                    Synthetic st = (Synthetic)at;
83                    int s_name_index = cpg.addUtf8("Synthetic");
84                    int s_len = st.getLength();
85                    byte[] s_bytes = st.getBytes();
86                    fg.addAttribute(new Synthetic(s_name_index, s_len, s_bytes, cpg.getConstantPool()));
87                 }
88              } else if (at instanceof Deprecated  ) {
89                 Deprecated   dp = (Deprecated  )at;
90                 int s_name_index = cpg.addUtf8("Deprecated");
91                 int s_len = dp.getLength();
92                 byte[] s_bytes = dp.getBytes();
93                 fg.addAttribute(new Deprecated  (s_name_index, s_len, s_bytes, cpg.getConstantPool()));
94              } else {
95                 System.err.println("[ERR FIELD ATTR]" + ats[j]);
96              }
97           }
98        }
99        return fg.getField();
100    }
101 
102    private void reshapeFieldInitVal(FieldGen fg, Type f_type, String   ini) {
103       if (f_type.equals(Type.BOOLEAN)) {
104          fg.setInitValue(Boolean.getBoolean(ini));
105       } else if (f_type.equals(Type.BYTE))    {
106          fg.setInitValue(Byte.parseByte(ini));
107       } else if (f_type.equals(Type.SHORT))   {
108          fg.setInitValue(Short.parseShort(ini));
109       } else if (f_type.equals(Type.INT))     {
110          fg.setInitValue(Integer.parseInt(ini));
111       } else if (f_type.equals(Type.LONG))    {
112          fg.setInitValue(Long.parseLong(ini));
113       } else if (f_type.equals(Type.FLOAT))   {
114          if ("Infinity".equals(ini)) {
115             fg.setInitValue(Float.POSITIVE_INFINITY);
116          } else if ("-Infinity".equals(ini)) {
117             fg.setInitValue(Float.NEGATIVE_INFINITY);
118          } else if ("NaN".equals(ini)) {
119             fg.setInitValue(Float.NaN);
120          } else {
121             fg.setInitValue(Float.parseFloat(ini));
122          }
123       } else if (f_type.equals(Type.DOUBLE))  {
124          if ("Infinity".equals(ini)) {
125             fg.setInitValue(Double.POSITIVE_INFINITY);
126          } else if ("-Infinity".equals(ini)) {
127             fg.setInitValue(Double.NEGATIVE_INFINITY);
128          } else if ("NaN".equals(ini)) {
129             fg.setInitValue(Double.NaN);
130          } else {
131             fg.setInitValue(Double.parseDouble(ini));
132          }
133       } else if (f_type.equals(Type.CHAR))    {
134          fg.setInitValue(ini.charAt(0));
135       } else if (f_type.equals(Type.STRING))  {
136          // BUGFIX>2002/02/09
137          // fg.setInitValue(ini.substring(1,ini.length()-1));
138          // BUGFIX>
139          fg.setInitValue(ini.substring(0, ini.length()));
140       } else {
141          throw new java.lang.IllegalStateException  ("illigal type : " + f_type);
142       }
143    }
144 }
145
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