/**
* Initialize the JavaScript context using given parent scope.
*
* @param scPrototype Parent scope object. If it's null, use default scope.
*/
public final void init(Scriptable scPrototype) throws ChartException {
final Context cx = Context.enter();
try {
if (scPrototype == null) // NO PROTOTYPE
{
// scope = cx.initStandardObjects();
scope = new ImporterTopLevel(cx);
} else {
scope = cx.newObject(scPrototype);
scope.setPrototype(scPrototype);
// !don't reset the parent scope here.
// scope.setParentScope( null );
}
// final Scriptable scopePrevious = scope;
// !deprecated, remove this later. use script context instead.
// registerExistingScriptableObject( this, "chart" ); //$NON-NLS-1$
// scope = scopePrevious; // RESTORE
// !deprecated, remove this later, use logger from script context
// instead.
// ADD LOGGING CAPABILITIES TO JAVASCRIPT ACCESS
final Object oConsole = Context.javaToJS(getLogger(), scope);
scope.put("logger", scope, oConsole); // $NON-NLS-1$
} catch (RhinoException jsx) {
throw convertException(jsx);
} finally {
Context.exit();
}
}
protected void addToScope(Scriptable scope) {
Object value = exportingBundle.lookup(name);
StringTokenizer tokenizer = new StringTokenizer(name, "."); // $NON-NLS-1$
while (true) {
String token = tokenizer.nextToken();
Object current = scope.get(token, scope);
if (!tokenizer.hasMoreTokens()) {
if (current == Scriptable.NOT_FOUND) {
if (value instanceof NativeObject) {
Scriptable wrapped = Context.getCurrentContext().newObject(scope);
wrapped.setPrototype((Scriptable) value);
value = wrapped;
}
scope.put(token, scope, value);
return;
}
throw new IllegalStateException(
"Resolve error: "
+ name
+ " already exists for "
+ this.toString()); // $NON-NLS-1$//$NON-NLS-2$
}
if (current == Scriptable.NOT_FOUND) {
current = ScriptableObject.getProperty(scope, token);
if (current == Scriptable.NOT_FOUND) current = Context.getCurrentContext().newObject(scope);
else if (current instanceof NativeObject) {
// we need to wrap this object from the prototype
Scriptable wrapped = Context.getCurrentContext().newObject(scope);
wrapped.setPrototype((Scriptable) current);
current = wrapped;
} else
throw new IllegalStateException(
"Resolve error: "
+ name
+ "-"
+ token
+ " already exists for "
+ this.toString()); // $NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
scope.put(token, scope, current);
}
scope = (Scriptable) current;
}
}
/**
* Validate that a regex is correct
*
* @param regex the regex to validate
* @return true if the regex is valid
*/
public static boolean regexIsValid(final String regex) {
final Context context = Context.enter();
try {
final Scriptable scope = context.newObject(sharedScope);
scope.setPrototype(sharedScope);
scope.setParentScope(null);
return (Boolean) regexIsValid.call(context, scope, scope, new Object[] {regex});
} finally {
Context.exit();
}
}
public Scriptable initialState(Map<String, Object> zero) {
Context context = ContextFactory.getGlobal().enterContext();
// Always interpret, since otherwise we have difficulty serialising.
context.setOptimizationLevel(-1);
// this arrangement means _global isn't mutable, and
// variables go in _topLevel.
ScriptableObject global = context.initStandardObjects(null, true);
global.sealObject();
_global = global;
_topLevel = context.newObject(_global);
_topLevel.setPrototype(_global);
_topLevel.setParentScope(null);
// TODO complain if it's not there
String script = zero.get("script").toString();
context.evaluateString(_topLevel, script, "<script>", 1, null);
context.exit();
return _topLevel;
}
public JsRunner get() {
/*
* Create a new thread/request local javascript scope for the JsRules,
* based on the preinitialized global one (which contains our js rules).
*/
// Avoid a write lock if we can
if (!rulesCurator.getUpdated().equals(this.updated)) {
compileRules(this.rulesCurator);
}
Scriptable rulesScope;
scriptLock.readLock().lock();
try {
Context context = Context.enter();
rulesScope = context.newObject(scope);
rulesScope.setPrototype(scope);
rulesScope.setParentScope(null);
Context.exit();
} finally {
scriptLock.readLock().unlock();
}
return new JsRunner(rulesScope);
}
