ScriptEngineManager mgr = new ScriptEngineManager();
- ScriptEngine e = mgr.getEngineByExtension(".lua");
+ ScriptEngine e = mgr.getEngineByName("luaj");
e.put("x", 25);
e.eval("y = math.sqrt(x)");
System.out.println( "y="+e.get("y") );
@@ -846,6 +846,7 @@ Files are no longer hosted at LuaForge.
3.0-beta1
- Fix bug that didn't read package.path from environment.
+- Fix pluggable scripting engine lookup, simplify implementation, and add unit tests.
- * Normally this will not be created directly, but instead will be created fro the script
- * engine using something like:
- *
- * ScriptEngineManager manager = new ScriptEngineManager();
- * ScriptEngine engine = manager.getEngineByExtension(".lua");
- * Bindings luaj_bindings = engine.createBindings();
- *
- *
- *
- * Each instance of LuajBindings holds its own global state.
- * Calls to get(), put(), and so on will coerce the lua values
- * into Java values on-the-fly, so that any performance or
- * memory occur at that point.
- *
- *
- * Only Java String keys may be used for get(), put(), and similar
- * operations, or ClassCastException will be thrown.
- *
- *
- * When iterating over the globals, only values which have string keys
- * will be returned.
- */
-public class LuajBindings implements Bindings {
-
- /** Values that are in these bindings. This table is linked to the metatable
- * of the context when it is executed via the metatable.
- */
- public final LuaTable env;
-
- /** Metatable to be used on bindings that will forards gets and sets into our table of bindings.
- */
- final LuaTable metatable;
-
- /** Construct an empty LuajBindings.
- *
- * Each LuajBindings has its own environment table, which will
- * delegate to the context on global reads during execution.
- */
- public LuajBindings() {
- env = new LuaTable();
- metatable = new LuaTable();
- metatable.set(LuaValue.INDEX, env);
- metatable.set(LuaValue.NEWINDEX, new ThreeArgFunction() {
- public LuaValue call(LuaValue table, LuaValue key, LuaValue value) {
- env.rawset(key, value);
- return LuaValue.NONE;
- }
- });
- }
-
- /** Coerce a value from luaj types to Java types.
- * @param luajValue any value that derives from LuaValue.
- * @return If luajValue is:
- * {@link #NIL}, null;
- * {@link #LuaString}: String;
- * {@link #LuaUserdata}: Object;
- * {@link #LuaNumber}: Integer or Double;
- * otherwise: the raw {@link #LuaValue}.
- */
- public Object toJava(LuaValue luajValue) {
- switch ( luajValue.type() ) {
- case LuaValue.TNIL: return null;
- case LuaValue.TSTRING: return luajValue.tojstring();
- case LuaValue.TUSERDATA: return luajValue.checkuserdata(Object.class);
- case LuaValue.TNUMBER: return luajValue.isinttype()?
- (Object) new Integer(luajValue.toint()):
- (Object) new Double(luajValue.todouble());
- default: return luajValue;
- }
- }
-
- /** Coerce a value from Java types to luaj types.
- * @param javaValue Any Java value, including possibly null.
- * @return LuaValue for this Java Value. If javaValue is
- * null: {@link #NIL};
- * {@link #LuaValue}: the value;
- * String: {@link #LuaString};
- * Integer: {@link #LuaInteger};
- * Double: {@link #LuaDouble};
- * array: {@link #LuaTable} containing list of values;
- * otherwise {@link #LuaUserdata} from behavior of {@link CoerceJavaToLua.coerce(Object)}
- * @see CoerceJavaToLua
- */
- public LuaValue toLua(Object javaValue) {
- return javaValue == null? LuaValue.NIL:
- javaValue instanceof LuaValue? (LuaValue) javaValue:
- CoerceJavaToLua.coerce(javaValue);
- }
-
- @Override
- public void clear() {
- for (LuaValue key : env.keys())
- env.rawset(key, LuaValue.NIL);
- }
-
- @Override
- public boolean containsValue(Object string_key) {
- return !env.rawget((String)string_key).isnil();
- }
-
- @Override
- public Set> entrySet() {
- HashMap map = new HashMap();
- for (LuaValue key : env.keys())
- if (key.type() == LuaValue.TSTRING)
- map.put(key.tojstring(), toJava(env.rawget(key)));
- return map.entrySet();
- }
-
- @Override
- public boolean isEmpty() {
- return keySet().isEmpty();
- }
-
- @Override
- public Set keySet() {
- Set set = new HashSet();
- for (LuaValue key : env.keys())
- if (key.type() == LuaValue.TSTRING)
- set.add(key.tojstring());
- return set;
- }
-
- @Override
- public int size() {
- return keySet().size();
- }
-
- @Override
- public Collection