private synchronized ScriptEngineState getEngineByName(String name, boolean reset)
throws SoarException {
ScriptEngineState state = engines.get(name);
if (state != null && reset) {
state.dispose();
engines.remove(name);
state = null;
}
if (state == null) {
final ScriptEngine engine = getEngineManager().getEngineByName(name);
if (engine == null) {
throw new SoarException("Unsupported script engine '" + name + "'");
}
final ScriptEngineFactory f = engine.getFactory();
logger.info(
String.format(
"Loaded '%s' script engine for %s: %s version %s, %s version %s",
name,
context,
f.getEngineName(),
f.getEngineVersion(),
f.getLanguageName(),
f.getLanguageVersion()));
engines.put(name, state = new ScriptEngineState(context, name, engine));
}
return state;
}
private synchronized String disposeEngine(String name) throws SoarException {
final ScriptEngineState state = engines.remove(name);
if (state != null) {
state.dispose();
return "Disposed '" + name + "'";
} else {
return "No engine '" + name + "'";
}
}
/* (non-Javadoc)
* @see org.jsoar.util.commands.SoarCommand#execute(java.lang.String[])
*/
@Override
public String execute(SoarCommandContext commandContext, String[] args) throws SoarException {
if (args.length == 1) {
return engines.toString();
}
// Strip off script and treat the engine type as the command name...
// i.e. "script javascript ..." becomes "javascript ..."
final List<String> engineArgs = globalOptions.process(Arrays.asList(args));
final String engineName = engineArgs.get(0);
if (globalOptions.has(GlobalOptions.dispose)) {
return disposeEngine(engineName);
}
final List<String> trailing = engineOptions.process(engineArgs);
final ScriptEngineState state =
getEngineByName(engineName, globalOptions.has(GlobalOptions.reset));
if (!trailing.isEmpty()) {
final Object result = state.eval(Joiner.on(' ').join(trailing));
return result != null ? result.toString() : "";
} else {
return state.toString();
}
}
