public static void main(String[] args) {
// Script Engine instantiation using ServiceProvider - this will
// look in the classpath for a file
// /META-INF/services/javax.script.ScriptEngineFactory
// where the AbclScriptEngineFactory is registered
ScriptEngine lispEngine = new ScriptEngineManager().getEngineByExtension("lisp");
// Alternatively, you can directly instantiate the script engine:
// ScriptEngineManager scriptManager = new ScriptEngineManager();
// scriptManager.registerEngineExtension("lisp", new AbclScriptEngineFactory());
// ScriptEngine lispEngine = scriptManager.getEngineByExtension("lisp");
// (thanks to Peter Tsenter for suggesting this)
// Accessing variables
System.out.println();
System.out.println("*package* = " + lispEngine.get("*package*"));
Object someValue = new Object();
lispEngine.put("someVariable", someValue);
System.out.println("someVariable = " + lispEngine.get("someVariable"));
try {
// Interpretation (also from streams)
lispEngine.eval("(defun hello (arg) (print (list arg someVariable)) (terpri))");
// Direct function invocation
((Invocable) lispEngine).invokeFunction("hello", "world");
// Implementing a Java interface in Lisp
lispEngine.eval("(defun compare-to (&rest args) 42)");
Comparable c = ((Invocable) lispEngine).getInterface(java.lang.Comparable.class);
System.out.println("compareTo: " + c.compareTo(null));
// Compilation!
lispEngine.eval(
"(defmacro slow-compiling-macro (arg) (dotimes (i 1000000) (incf i)) `(print ,arg))");
long millis = System.currentTimeMillis();
lispEngine.eval("(slow-compiling-macro 42)");
millis = System.currentTimeMillis() - millis;
System.out.println("interpretation took " + millis);
millis = System.currentTimeMillis();
CompiledScript cs = ((Compilable) lispEngine).compile("(slow-compiling-macro 42)");
millis = System.currentTimeMillis() - millis;
System.out.println("compilation took " + millis);
millis = System.currentTimeMillis();
cs.eval();
millis = System.currentTimeMillis() - millis;
System.out.println("evaluation took " + millis);
millis = System.currentTimeMillis();
cs.eval();
millis = System.currentTimeMillis() - millis;
System.out.println("evaluation took " + millis);
// Ecc. ecc.
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (ScriptException e) {
e.printStackTrace();
}
}
static void nashornInvokeMethod(String code) throws ScriptException, NoSuchMethodException {
ScriptEngineManager factory = new ScriptEngineManager();
ScriptEngine engine = factory.getEngineByName("nashorn");
engine.eval(code);
Invocable inv = (Invocable) engine;
JSObject propertiesDict = (JSObject) engine.get("properties");
Object result = null;
Object property;
long total = 0;
for (int i = 0; i < RUNS; ++i) {
long start = System.nanoTime();
for (int j = 0; j < BATCH; ++j) {
property = propertiesDict.getMember("ssn");
result = inv.invokeMethod(property, "clean", "12345678");
}
long stop = System.nanoTime();
System.out.println(
"Run "
+ (i * BATCH + 1)
+ "-"
+ ((i + 1) * BATCH)
+ ": "
+ Math.round((stop - start) / BATCH / 1000)
+ " us");
total += (stop - start);
}
System.out.println("Average run: " + Math.round(total / RUNS / BATCH / 1000) + " us");
System.out.println(
"Data is " + ((Invocable) engine).invokeMethod(result, "toString").toString());
}
public static void main(String[] args) throws Exception {
System.out.println("\nTest7\n");
File file = new File(System.getProperty("test.src", "."), "Test7.js");
Reader r = new FileReader(file);
ScriptEngineManager m = new ScriptEngineManager();
ScriptEngine eng = Helper.getJsEngine(m);
if (eng == null) {
System.out.println("Warning: No js engine found; test vacuously passes.");
return;
}
eng.put("filename", file.getAbsolutePath());
eng.eval(r);
String str = (String) eng.get("firstLine");
// do not change first line in Test7.js -- we check it here!
if (!str.equals("//this is the first line of Test7.js")) {
throw new RuntimeException("unexpected first line");
}
}
private void initScript() {
String scriptName = "src" + File.separator + "jscripts" + File.separator + "CreateWorld.js";
List<ScriptEngineFactory> list = factory.getEngineFactories();
File scriptFile = new File(scriptName);
try {
FileReader fileReader = new FileReader(scriptFile);
engine.eval(fileReader);
fileReader.close();
} catch (FileNotFoundException e1) {
System.out.println(scriptName + " not found " + e1);
} catch (IOException e2) {
System.out.println("IO issue detected " + scriptName + e2);
} catch (ScriptException e3) {
System.out.println("ScriptException in " + scriptName + e3);
} catch (NullPointerException e4) {
System.out.println("Null pointer in" + scriptName + e4);
}
addGameWorldObject((SceneNode) engine.get("worldAxis"));
}