JNIWindowsShortcut


1   /**
2    * @creation 28/02/05
3    *
4   */
5   
6   package com.memoire.vainstall;
7   
8   import java.io.File  ;
9   import java.io.IOException  ;
10  
11  /**
12    * A means of creating Windows shortcuts using the JNI interface.
13    * @author Dick Repasky
14    *
15  */
16  
17  public class JNIWindowsShortcut {
18                          /** Value for location. 
19                              If you use this value,
20                              the value of linkname
21                              should include the
22                              full name of the
23                              directory that will
24                              contain the new link. */
25      public static final int CUSTOM_LOCATION = 0;
26                          /** Value for location. */
27      public static final int ON_DESKTOP  = 1;
28                          /** Value for location. */
29      public static final int ON_START_MENU   = 2;
30  
31                          /** Value for forwhom. */
32      public static final int USER_ONLY   = 0;
33                          /** Value for forwhom. */
34      public static final int EVERYBODY   = 1;
35  
36                          /** Value for openas. */
37      public static final int SHOW_NORMAL = 0;
38                          /** Value for openas. */
39      public static final int SHOW_MAX    = 1;
40                          /** Value for openas. */
41      public static final int SHOW_MIN    = 2;
42      
43      public static boolean isDllLoaded_;
44      
45      public static void loadLib(){
46          if(!isDllLoaded_){
47              isDllLoaded_=true;
48              System.load( LIB_NAME);
49          }
50      }
51  
52                          /** Name of dll. */
53      public static String   LIB_NAME   = "JNIWinShortcut";
54      private static final String   DEFAULT_LINK = "LaunchIt";
55  
56      /** Create a Windows Shortcut using the information provided. 
57          @parm target name - binary to be executed. Required.
58                  Must be fully qualified path to work.
59          @parm workingdir - name of working directory for running 
60              binary. Required.
61                  Must be fully qualified path to work.
62          @parm args  - arguments to be passed to the binary. 
63                  Optional.
64          @parm linkname  - name of the link file.  Omit .LNK suffix!
65                  Include leading directory names only if
66                  location is CUSTOM_LOCATION.
67          @parm location - one of CUSTOM_LOCATION, ON_DESKTOP, 
68                  ON_STARTMENU.
69          @parm forwhom  - one of USER_ONLY or EVERYBODY. Ignored if
70                  location is CUSTOM_LOCATION.
71          @parm iconfile - name of icon file. Must be fully qualified
72                  path to work.
73          @parm iconoffset - offest of icon within iconfile.
74          @parm description - speak freely here. But, be brief. I don't
75                  know what the limit is.
76      */
77      public static final String   createShortcut(String   targetname,
78                          String   workingdir,
79                          String   args,
80                          int openas,
81                          String   linkname,
82                          int location,
83                          int     forwhom,
84                          String    iconfile,
85                          int     iconoffset,
86                          String    description)
87                      throws IOException   {
88          loadLib();
89          if (targetname == null) targetname = "";
90          if (workingdir == null) workingdir = "";
91          if (args == null) args = "";
92          if (linkname == null || linkname.length() == 0) linkname = 
93                                  DEFAULT_LINK;
94          if (iconfile == null) iconfile = "";
95          if (description == null) description = "";
96          String   f=createShortcutJNI(targetname, workingdir, args,
97              openas, linkname, location, forwhom, iconfile,
98              iconoffset, description);
99          File   shortcutFile = new File  (f);
100         if(!shortcutFile.exists()){
101             if(VAGlobals.DEBUG) VAGlobals.printDebug("shortcut not found "+shortcutFile.getName());
102             String   name=shortcutFile.getName();
103             int idxDot=name.lastIndexOf('.');
104             if(idxDot>0){
105                 name=name.substring(0,idxDot);
106                 File   test=new File  (shortcutFile.getParentFile(),name+".pif");
107                 System.err.println("file tested "+test);
108                 if(test.exists()) {
109                     if(VAGlobals.DEBUG) VAGlobals.printDebug("shortcut guessed "+test.getName());
110 
111                     f=test.getAbsolutePath();
112                 }
113             }
114         }
115         return f;
116     }
117 
118 
119         /**
120           * Return the name of the directory that would contain
121           * a link of the type give.
122           * @parm location should be one of ON_DESKTOP or ON_START_MENU.
123           * @parm forwhom should be one of EVERYBODY or USER_ONLY.
124           *
125         */
126 
127     public static final String   getShortcutDir(int location,
128                         int forwhom) {
129         loadLib();
130         return getLinkDir(location, forwhom);
131     }
132 
133 
134         /**
135           * Return the name of the shortcut that would be created if
136           * the following arguments were used.  Arguments are as
137           * for createShortcut. 
138           * @exception java.io.IOException if full path name is
139           * longer than maximum allowed.
140         */
141 
142     public static final String   getShortcutName(String   linkname,
143                         int location,
144                         int forwhom) 
145                     throws IOException   {
146         loadLib();
147         if (linkname == null || linkname.length() == 0) linkname = 
148                                 DEFAULT_LINK;
149         return getLinkName(linkname, location, forwhom);
150     }
151 
152         /**
153           * Return maximum allowable Win32 path length (i.e.,
154           * value of the constant MAX_PATH).
155           *
156         */
157 
158     public static final int getMaxPathlength() {
159         loadLib();
160         return getMAX_PATH();
161     }
162 
163         /** Create a shortcut. */
164     private static final native String   createShortcutJNI(String   targetname,
165                 String   workingdir,
166                 String   args,
167                 int openas,
168                 String   linkname,
169                 int location,
170                 int forwhom,
171                 String   iconfile,
172                 int iconoffset,
173                 String   descriptions) throws IOException  ;
174 
175         /**
176           * Get the name of the directory for links of the type
177           * given.
178           *
179         */
180     private static final native String   getLinkDir(int location,
181                         int forwhom);
182 
183         /**
184           * Get the full file name of a shortcut that would
185           * be created using the arguments.
186           * @exception java.io.IOException if full path name is
187           * longer than maximum allowed.
188         */
189 
190     private static final native String   getLinkName(String   linkname,
191                         int location,
192                         int forwhom) throws IOException  ;
193 
194         /**
195           * Return value of Win32 MAX_PATH.
196           *
197         */
198 
199     private static final native int getMAX_PATH();
200 
201 }
202
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