/**
* Execute Script Loads environment and saves result
*
* @return null or Exception
*/
public Exception execute() {
m_result = null;
if (m_variable == null
|| m_variable.length() == 0
|| m_script == null
|| m_script.length() == 0) {
IllegalArgumentException e = new IllegalArgumentException("No variable/script");
log.config(e.toString());
return e;
}
Interpreter i = new Interpreter();
loadEnvironment(i);
try {
log.config(m_script);
i.eval(m_script);
} catch (Exception e) {
log.config(e.toString());
return e;
}
try {
m_result = i.get(m_variable);
log.config("Result (" + m_result.getClass().getName() + ") " + m_result);
} catch (Exception e) {
log.config("Result - " + e);
if (e instanceof NullPointerException)
e = new IllegalArgumentException("Result Variable not found - " + m_variable);
return e;
}
return null;
} // execute
/**
* Set Environment for Interpreter
*
* @param i Interpreter
*/
private void loadEnvironment(Interpreter i) {
if (m_ctx == null) return;
Iterator<String> it = m_ctx.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
Object value = m_ctx.get(key);
try {
if (value instanceof Boolean) i.set(key, ((Boolean) value).booleanValue());
else if (value instanceof Integer) i.set(key, ((Integer) value).intValue());
else if (value instanceof Double) i.set(key, ((Double) value).doubleValue());
else i.set(key, value);
} catch (EvalError ee) {
log.log(Level.SEVERE, "", ee);
}
}
} // setEnvironment