How to use

preCheck

method

in

weka.gui.scripting.Script

/**
 * Executes the script.
 * 
 * @param args optional commandline arguments, can be null
 * @throws Exception if checks or execution fail
 */
public void start(String[] args) throws Exception {
 if (args == null) {
  args = new String[0];
 }
 preCheck(args);
 execute(args);
}

/**
 * Performs pre-execution checks.
 * <p/>
 * This method checks whether Groovy is available (throws an exception if not).
 * 
 * @param args    optional commandline arguments
 * @throws Exception    if checks fail
 */
protected void preCheck(String[] args) throws Exception {
 super.preCheck(args);
 
 if (!Groovy.isPresent())
  throw new Exception("Groovy classes are not present in CLASSPATH!");
}

/**
 * Executes the script.
 * 
 * @param args optional commandline arguments, can be null
 * @throws Exception if checks or execution fail
 */
public void start(String[] args) throws Exception {
 if (args == null) {
  args = new String[0];
 }
 preCheck(args);
 execute(args);
}

/**
 * Performs pre-execution checks.
 * <p/>
 * This method checks whether Groovy is available (throws an exception if not).
 * 
 * @param args    optional commandline arguments
 * @throws Exception    if checks fail
 */
protected void preCheck(String[] args) throws Exception {
 super.preCheck(args);
 
 if (!Groovy.isPresent())
  throw new Exception("Groovy classes are not present in CLASSPATH!");
}

/**
 * Performs pre-execution checks.
 * <p/>
 * This method checks whether Jython is available (throws an exception if
 * not).
 * 
 * @param args optional commandline arguments
 * @throws Exception if checks fail
 */
@Override
protected void preCheck(String[] args) throws Exception {
 super.preCheck(args);
 if (!Jython.isPresent()) {
  throw new Exception("Jython classes are not present in CLASSPATH!");
 }
}

/**
 * Performs pre-execution checks.
 * <p/>
 * This method checks whether Jython is available (throws an exception if
 * not).
 * 
 * @param args optional commandline arguments
 * @throws Exception if checks fail
 */
@Override
protected void preCheck(String[] args) throws Exception {
 super.preCheck(args);
 if (!Jython.isPresent()) {
  throw new Exception("Jython classes are not present in CLASSPATH!");
 }
}