/** LICENSE: This code is in the public domain.  */
package at.etel.misc;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class TestUpdateLevel {
  static public void main(String argv[]) {
    TestUpdateLevel main = new TestUpdateLevel();
    System.out.println("isUpdateLevelOk() returns " + main.isUpdateLevelOK());
  }
  
  static Pattern updateVersionRegexp
          = Pattern.compile("^diablo-1\\.5\\" +
          ".0_([0-9][0-9])-.*");
  
  /** Minimum update level required */ 
  static int desiredUpdateLevel = 5;
  
  /** @return true if JVM has proper update level for installing Enteprise */
  public boolean isUpdateLevelOK() {
    String vmVersion = System.getProperty("java.vm.version");
    System.out.println(vmVersion);
    if (vmVersion.startsWith("diablo")) {
      Matcher versionMatcher = updateVersionRegexp.matcher(vmVersion);
      versionMatcher.find();
      String version = versionMatcher.group(1);
      int versionLevel = Integer.valueOf(version);
      if (versionLevel >= desiredUpdateLevel) {
        return true;
      }
    } else {
      /* other platforms possibly go here */
      return false;
    }
    return false;
  }
}