git.gag.com Git - debian/openrocket/blob - core/src/net/sf/openrocket/startup/VersionHelper.java

   1 package net.sf.openrocket.startup;
   2
   3 import java.awt.GraphicsEnvironment;
   4
   5 import javax.swing.JOptionPane;
   6
   7 import net.sf.openrocket.logging.LogHelper;
   8
   9 public class VersionHelper {
  10
  11         private static final LogHelper log = Application.getLogger();
  12
  13         private static final int REQUIRED_MAJOR_VERSION = 1;
  14         private static final int REQUIRED_MINOR_VERSION = 6;
  15
  16         // OpenJDK 1.6.0_0-b16 is known to work, 1.6.0_0-b12 does not
  17         private static final String BAD_OPENJDK_VERSION = "^1.6.0_0-b([0-9]|1[1-5])$";
  18
  19
  20         /**
  21          * Check that the JRE version is high enough.
  22          */
  23         static void checkVersion() {
  24
  25                 String[] version = System.getProperty("java.specification.version", "").split("\\.");
  26
  27                 String jreName = System.getProperty("java.vm.name", "(unknown)");
  28                 String jreVersion = System.getProperty("java.runtime.version", "(unknown)");
  29                 String jreVendor = System.getProperty("java.vendor", "(unknown)");
  30
  31                 log.info("Running JRE " + jreName + " version " + jreVersion + " by " + jreVendor);
  32
  33                 int major, minor;
  34
  35                 try {
  36                         major = Integer.parseInt(version[0]);
  37                         minor = Integer.parseInt(version[1]);
  38
  39                         if (major < REQUIRED_MAJOR_VERSION ||
  40                                         (major == REQUIRED_MAJOR_VERSION && minor < REQUIRED_MINOR_VERSION)) {
  41                                 error(new String[] { "Java SE version 6 is required to run OpenRocket.",
  42                                                 "You are currently running " + jreName + " version " +
  43                                                                 jreVersion + " by " + jreVendor });
  44                         }
  45
  46                 } catch (RuntimeException e) {
  47
  48                         confirm(new String[] { "The Java version in use could not be detected.",
  49                                         "OpenRocket requires at least Java SE 6.",
  50                                         "Continue anyway?" });
  51
  52                 }
  53
  54         }
  55
  56         /**
  57          * Check whether OpenJDK is being used, and if it is warn the user about
  58          * problems and confirm whether to continue.
  59          */
  60         static void checkOpenJDK() {
  61
  62                 if (System.getProperty("java.runtime.name", "").toLowerCase().indexOf("icedtea") >= 0 ||
  63                                 System.getProperty("java.vm.name", "").toLowerCase().indexOf("openjdk") >= 0) {
  64
  65                         String jreName = System.getProperty("java.vm.name", "(unknown)");
  66                         String jreVersion = System.getProperty("java.runtime.version", "(unknown)");
  67                         String jreVendor = System.getProperty("java.vendor", "(unknown)");
  68
  69                         if (jreVersion.matches(BAD_OPENJDK_VERSION)) {
  70
  71                                 confirm(new String[] { "Old versions of OpenJDK are known to have problems " +
  72                                                 "running OpenRocket.",
  73                                                 " ",
  74                                                 "You are currently running " + jreName + " version " +
  75                                                                 jreVersion + " by " + jreVendor,
  76                                                 "Do you want to continue?" });
  77                         }
  78                 }
  79         }
  80
  81
  82
  83         ///////////  Helper methods  //////////
  84
  85         /**
  86          * Presents an error message to the user and exits the application.
  87          *
  88          * @param message       an array of messages to present.
  89          */
  90         private static void error(String[] message) {
  91
  92                 System.err.println();
  93                 System.err.println("Error starting OpenRocket:");
  94                 System.err.println();
  95                 for (int i = 0; i < message.length; i++) {
  96                         System.err.println(message[i]);
  97                 }
  98                 System.err.println();
  99
 100
 101                 if (!GraphicsEnvironment.isHeadless()) {
 102
 103                         JOptionPane.showMessageDialog(null, message, "Error starting OpenRocket",
 104                                         JOptionPane.ERROR_MESSAGE);
 105
 106                 }
 107
 108                 System.exit(1);
 109         }
 110
 111
 112         /**
 113          * Presents the user with a message dialog and asks whether to continue.
 114          * If the user does not select "Yes" the the application exits.
 115          *
 116          * @param message       the message Strings to show.
 117          */
 118         private static void confirm(String[] message) {
 119
 120                 if (!GraphicsEnvironment.isHeadless()) {
 121
 122                         if (JOptionPane.showConfirmDialog(null, message, "Error starting OpenRocket",
 123                                         JOptionPane.YES_NO_OPTION) != JOptionPane.YES_OPTION) {
 124                                 System.exit(1);
 125                         }
 126                 }
 127         }
 128 }