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Java > Open Source Codes > org > objectstyle > cayenne > modeler > util > BrowserControl


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
5  *
6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
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  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
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17  * notice, this list of conditions and the following disclaimer in
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19  * distribution.
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21  * 3. The end-user documentation included with the redistribution, if any,
22  * must include the following acknowlegement:
23  * "This product includes software developed by independent contributors
24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
27  *
28  * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
29  * or promote products derived from this software without prior written
30  * permission. For written permission, email
31  * "andrus at objectstyle dot org".
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33  * 5. Products derived from this software may not be called "ObjectStyle"
34  * or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
35  * names without prior written permission.
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37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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48  * SUCH DAMAGE.
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51  * This software consists of voluntary contributions made by many
52  * individuals and hosted on ObjectStyle Group web site. For more
53  * information on the ObjectStyle Group, please see
54  * <http://objectstyle.org/>.
55  */
56 package org.objectstyle.cayenne.modeler.util;
57
58 import java.io.IOException JavaDoc;
59
60 import org.apache.log4j.Logger;
61
62
63 /**
64  * Opens a URL in the system default browser. Code is based on
65  * <a HREF="http://www.javaworld.com/javaworld/javatips/jw-javatip66.html">JavaWorld
66  * article</a> by Steven Spencer.
67  *
68  * @author Andrei Adamchik
69  */
70 public class BrowserControl {
71     private static Logger logObj = Logger.getLogger(BrowserControl.class);
72
73     // Used to identify the windows platform.
74 private static final String JavaDoc WIN_ID = "Windows";
75     // The default system browser under windows.
76 private static final String JavaDoc WIN_PATH = "rundll32";
77     // The flag to display a url.
78 private static final String JavaDoc WIN_FLAG = "url.dll,FileProtocolHandler";
79     // The default browser under unix.
80 // private static final String UNIX_PATH = "netscape";
81 // The flag to display a url.
82 // private static final String UNIX_FLAG = "-remote openURL";
83
84     
85     /**
86      * Display a file in the system browser. If you want to display a
87      * file, you must include the absolute path name.
88      *
89      * @param url the file's url (the url must start with either "http://"
90      * or "file://").
91      */
92     public static void displayURL(String JavaDoc url) {
93         boolean windows = isWindowsPlatform();
94         String JavaDoc cmd = null;
95         try {
96             if (windows) {
97                 // cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
98 cmd = WIN_PATH + " " + WIN_FLAG + " " + url;
99                 Runtime.getRuntime().exec(cmd);
100             } else {
101                 // Under Unix, Netscape has to be running for the "-remote"
102 // command to work. So, we try sending the command and
103 // check for an exit value. If the exit command is 0,
104 // it worked, otherwise we need to start the browser.
105 // cmd = 'netscape -remote openURL(http://www.javaworld.com)'
106 /* cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + url + ")";
107                 Process p = Runtime.getRuntime().exec(cmd);
108                 try {
109                     // wait for exit code -- if it's 0, command worked,
110                     // otherwise we need to start the browser up.
111                     int exitCode = p.waitFor();
112                     if (exitCode != 0) {
113                         // Command failed, start up the browser
114                         // cmd = 'netscape http://www.javaworld.com'
115                         cmd = UNIX_PATH + " " + url;
116                         p = Runtime.getRuntime().exec(cmd);
117                     }
118                 } catch (InterruptedException x) {
119                     System.err.println(
120                         "Error bringing up browser, cmd='" + cmd + "'");
121                     System.err.println("Caught: " + x);
122                 } */
123             }
124         } catch (IOException JavaDoc ex) {
125             // couldn't exec browser
126 logObj.debug("Could not invoke browser, command=" + cmd, ex);
127         }
128     }
129     /**
130      * Try to determine whether this application is running under Windows
131      * or some other platform by examing the "os.name" property.
132      *
133      * @return true if this application is running under a Windows OS
134      */
135     public static boolean isWindowsPlatform() {
136         String JavaDoc os = System.getProperty("os.name");
137         if (os != null && os.startsWith(WIN_ID))
138             return true;
139         else
140             return false;
141
142     }
143 }
144
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