/**
* Return new {@link Scriptable} instance using the default constructor for the class of the
* underlying Java method. Return null to indicate that the call method should be used to create
* new objects.
*/
public Scriptable createObject(Context cx, Scriptable scope) {
if (member.isCtor() || (parmsLength == VARARGS_CTOR)) {
return null;
}
Scriptable result;
try {
result = (Scriptable) member.getDeclaringClass().newInstance();
} catch (Exception ex) {
throw Context.throwAsScriptRuntimeEx(ex);
}
result.setPrototype(getClassPrototype());
result.setParentScope(getParentScope());
return result;
}
/**
* Define this function as a JavaScript constructor.
*
* <p>Sets up the "prototype" and "constructor" properties. Also calls setParent and setPrototype
* with appropriate values. Then adds the function object as a property of the given scope, using
* <code>prototype.getClassName()</code> as the name of the property.
*
* @param scope the scope in which to define the constructor (typically the global object)
* @param prototype the prototype object
* @see gov.nbcs.rp.common.js.javascript.Scriptable#setParentScope
* @see gov.nbcs.rp.common.js.javascript.Scriptable#setPrototype
* @see gov.nbcs.rp.common.js.javascript.Scriptable#getClassName
*/
public void addAsConstructor(Scriptable scope, Scriptable prototype) {
ScriptRuntime.setFunctionProtoAndParent(this, scope);
setImmunePrototypeProperty(prototype);
prototype.setParentScope(this);
final int attr =
ScriptableObject.DONTENUM | ScriptableObject.PERMANENT | ScriptableObject.READONLY;
defineProperty(prototype, "constructor", this, attr);
String name = prototype.getClassName();
defineProperty(scope, name, this, ScriptableObject.DONTENUM);
setParentScope(scope);
}
@Override
public Object call(Context cx, Scriptable scope, Scriptable thisObj, Object[] args) {
// Find a method that matches the types given.
if (methods.length == 0) {
throw new RuntimeException("No methods defined for call");
}
int index = findFunction(cx, methods, args);
if (index < 0) {
Class<?> c = methods[0].method().getDeclaringClass();
String sig = c.getName() + '.' + getFunctionName() + '(' + scriptSignature(args) + ')';
throw Context.reportRuntimeError1("msg.java.no_such_method", sig);
}
MemberBox meth = methods[index];
Class<?>[] argTypes = meth.argTypes;
if (meth.vararg) {
// marshall the explicit parameters
Object[] newArgs = new Object[argTypes.length];
for (int i = 0; i < argTypes.length - 1; i++) {
newArgs[i] = Context.jsToJava(args[i], argTypes[i]);
}
Object varArgs;
// Handle special situation where a single variable parameter
// is given and it is a Java or ECMA array or is null.
if (args.length == argTypes.length
&& (args[args.length - 1] == null
|| args[args.length - 1] instanceof NativeArray
|| args[args.length - 1] instanceof NativeJavaArray)) {
// convert the ECMA array into a native array
varArgs = Context.jsToJava(args[args.length - 1], argTypes[argTypes.length - 1]);
} else {
// marshall the variable parameters
Class<?> componentType = argTypes[argTypes.length - 1].getComponentType();
varArgs = Array.newInstance(componentType, args.length - argTypes.length + 1);
for (int i = 0; i < Array.getLength(varArgs); i++) {
Object value = Context.jsToJava(args[argTypes.length - 1 + i], componentType);
Array.set(varArgs, i, value);
}
}
// add varargs
newArgs[argTypes.length - 1] = varArgs;
// replace the original args with the new one
args = newArgs;
} else {
// First, we marshall the args.
Object[] origArgs = args;
for (int i = 0; i < args.length; i++) {
Object arg = args[i];
Object coerced = Context.jsToJava(arg, argTypes[i]);
if (coerced != arg) {
if (origArgs == args) {
args = args.clone();
}
args[i] = coerced;
}
}
}
Object javaObject;
if (meth.isStatic()) {
javaObject = null; // don't need an object
} else {
Scriptable o = thisObj;
Class<?> c = meth.getDeclaringClass();
for (; ; ) {
if (o == null) {
throw Context.reportRuntimeError3(
"msg.nonjava.method",
getFunctionName(),
ScriptRuntime.toString(thisObj),
c.getName());
}
if (o instanceof Wrapper) {
javaObject = ((Wrapper) o).unwrap();
if (c.isInstance(javaObject)) {
break;
}
}
o = o.getPrototype();
}
}
if (debug) {
printDebug("Calling ", meth, args);
}
Object retval = meth.invoke(javaObject, args);
Class<?> staticType = meth.method().getReturnType();
if (debug) {
Class<?> actualType = (retval == null) ? null : retval.getClass();
System.err.println(
" ----- Returned " + retval + " actual = " + actualType + " expect = " + staticType);
}
Object wrapped =
cx.getWrapFactory()
.wrap(
cx, scope,
retval, staticType);
if (debug) {
Class<?> actualType = (wrapped == null) ? null : wrapped.getClass();
System.err.println(" ----- Wrapped as " + wrapped + " class = " + actualType);
}
if (wrapped == null && staticType == Void.TYPE) {
wrapped = Undefined.instance;
}
return wrapped;
}