/*
* Copyright 2009 the Helma Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.ringojs.engine;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.ContextAction;
import org.mozilla.javascript.ContextFactory;
import org.mozilla.javascript.Function;
import org.mozilla.javascript.NativeJavaClass;
import org.mozilla.javascript.NativeJavaObject;
import org.mozilla.javascript.RhinoException;
import org.mozilla.javascript.ScriptRuntime;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptableObject;
import org.mozilla.javascript.WrappedException;
import org.mozilla.javascript.Wrapper;
import org.mozilla.javascript.tools.shell.Environment;
import org.mozilla.javascript.tools.shell.QuitAction;
import org.ringojs.repository.Repository;
import org.ringojs.repository.Trackable;
import org.ringojs.security.RingoSecurityManager;
import org.ringojs.util.ScriptUtils;
import org.mozilla.javascript.tools.shell.Global;
import org.ringojs.repository.Resource;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.io.IOException;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
public class RingoGlobal extends Global {
private final RhinoEngine engine;
private final static SecurityManager securityManager = System.getSecurityManager();
private static ExecutorService threadPool;
private static AtomicInteger ids = new AtomicInteger();
public RingoGlobal(Context cx, RhinoEngine engine, boolean sealed) {
this.engine = engine;
init(cx, engine, sealed);
}
public void init(Context cx, RhinoEngine engine, boolean sealed) {
// Define some global functions particular to the shell. Note
// that these functions are not part of ECMA.
initStandardObjects(cx, sealed);
initQuitAction(new QuitAction() {
public void quit(Context cx, int exitCode) {
System.exit(exitCode);
}
});
String[] names = {
"gc",
"load",
"print",
"quit",
"seal",
"sync"
};
defineFunctionProperties(names, Global.class,
ScriptableObject.DONTENUM);
names = new String[] {
"defineClass",
"getResource",
"getRepository",
"addToClasspath",
"privileged",
"spawn"
};
defineFunctionProperties(names, RingoGlobal.class,
ScriptableObject.DONTENUM);
defineProperty("require", new Require(engine, this), DONTENUM);
defineProperty("arguments", cx.newArray(this, engine.getArguments()), DONTENUM);
// Set up "environment" in the global scope to provide access to the
// System environment variables. http://github.com/ringo/ringojs/issues/#issue/88
Environment.defineClass(this);
Environment environment = new Environment(this);
defineProperty("environment", environment, ScriptableObject.DONTENUM);
}
public RhinoEngine getEngine() {
return engine;
}
@SuppressWarnings("unchecked")
public static void defineClass(final Context cx, Scriptable thisObj,
Object[] args, Function funObj)
throws IllegalAccessException, InstantiationException, InvocationTargetException {
ScriptUtils.checkArguments(args, 1, 1);
Object arg = args[0] instanceof Wrapper ? ((Wrapper) args[0]).unwrap() : args[0];
if (!(arg instanceof Class)) {
throw Context.reportRuntimeError("defineClass() requires a class argument");
}
RhinoEngine engine = ((RingoGlobal) funObj.getParentScope()).engine;
engine.defineHostClass((Class) arg);
}
public static Object getResource(final Context cx, Scriptable thisObj,
Object[] args, Function funObj) {
if (args.length != 1 || !(args[0] instanceof String)) {
throw Context.reportRuntimeError(
"getResource() requires a string argument");
}
RhinoEngine engine = ((RingoGlobal) funObj.getParentScope()).engine;
try {
Resource res = engine.findResource((String) args[0], null,
engine.getParentRepository(thisObj));
return cx.getWrapFactory().wrapAsJavaObject(cx, engine.getScope(),
res, null);
} catch (IOException iox) {
throw Context.reportRuntimeError("Cannot find resource " + args[0] + "'");
}
}
public static Object getRepository(final Context cx, Scriptable thisObj,
Object[] args, Function funObj) {
if (args.length != 1 || !(args[0] instanceof String)) {
throw Context.reportRuntimeError(
"getRepository() requires a string argument");
}
RhinoEngine engine = ((RingoGlobal) funObj.getParentScope()).engine;
try {
Repository repo = engine.findRepository((String) args[0],
engine.getParentRepository(thisObj));
return cx.getWrapFactory().wrapAsJavaObject(cx, engine.getScope(), repo, null);
} catch (IOException iox) {
throw Context.reportRuntimeError("Cannot find repository " + args[0] + "'");
}
}
public static Object addToClasspath(final Context cx, Scriptable thisObj,
Object[] args, Function funObj) {
if (securityManager != null) {
securityManager.checkPermission(RingoSecurityManager.GET_CLASSLOADER);
}
if (args.length != 1) {
throw Context.reportRuntimeError(
"addToClasspath() requires one argument");
}
try {
Trackable path;
RhinoEngine engine = ((RingoGlobal) funObj.getParentScope()).engine;
Object arg = args[0] instanceof Wrapper ?
((Wrapper) args[0]).unwrap() : args[0];
if (arg instanceof String) {
path = engine.resolve((String) arg,
engine.getParentRepository(thisObj));
} else if (arg instanceof Trackable) {
path = (Trackable) arg;
} else {
throw Context.reportRuntimeError(
"addToClasspath() requires a path argument");
}
if (!path.exists()) {
throw Context.reportRuntimeError("addToClasspath(): Cannot find " + path);
}
engine.addToClasspath(path);
return Boolean.TRUE;
} catch (IOException iox) {
throw new WrappedException(iox);
}
}
@SuppressWarnings("unchecked")
public static Object privileged(final Context cx, Scriptable thisObj,
Object[] args, Function funObj) {
if (args.length != 1 || !(args[0] instanceof Function)) {
throw Context.reportRuntimeError(
"privileged() requires a function argument");
}
final Scriptable scope = getTopLevelScope(thisObj);
Scriptable s = cx.newObject(scope);
s.put("run", s, args[0]);
final Object[] jargs = {new NativeJavaClass(scope, PrivilegedAction.class), s};
PrivilegedAction action = AccessController.doPrivileged(
new PrivilegedAction<PrivilegedAction>() {
public PrivilegedAction run() {
return (PrivilegedAction) ((Wrapper) cx.newObject(scope,
"JavaAdapter", jargs)).unwrap();
}
}
);
// PrivilegedAction action = (PrivilegedAction) InterfaceAdapter.create(cx, PrivilegedAction.class, (Callable) args[0]);
return cx.getWrapFactory().wrap(cx, scope,
AccessController.doPrivileged(action), null);
}
public static Object spawn(Context cx, Scriptable thisObj,
Object[] args, Function funObj) {
if (securityManager != null) {
securityManager.checkPermission(RingoSecurityManager.SPAWN_THREAD);
}
if (args.length < 1 || !(args[0] instanceof Function)) {
throw Context.reportRuntimeError("spawn() requires a function argument");
}
final Scriptable scope = funObj.getParentScope();
final ContextFactory cxfactory = cx.getFactory();
final Function function = (Function) args[0];
final Object[] fnArgs;
if (args.length > 1 && args[1] instanceof Scriptable) {
fnArgs = cx.getElements((Scriptable) args[1]);
} else {
fnArgs = ScriptRuntime.emptyArgs;
}
return getThreadPool().submit(new Callable<Object>() {
public Object call() {
return cxfactory.call(new ContextAction() {
public Object run(Context cx) {
return function.call(cx, scope, scope, fnArgs);
}
});
}
});
}
static ExecutorService getThreadPool() {
if (threadPool != null) {
return threadPool;
}
synchronized (Global.class) {
if (threadPool == null) {
threadPool = Executors.newCachedThreadPool(new ThreadFactory() {
public Thread newThread(Runnable runnable) {
Thread thread = new Thread(runnable,
"ringo-spawn-" + ids.incrementAndGet());
thread.setDaemon(true);
return thread;
}
});
}
return threadPool;
}
}
}