@Override
public void put(String name, Scriptable start, Object value) {
int info = findInstanceIdInfo(name);
if (info != 0) {
if (start == this && isSealed()) {
throw Context.reportRuntimeError1("msg.modify.sealed", name);
}
int attr = (info >>> 16);
if ((attr & READONLY) == 0) {
if (start == this) {
int id = (info & 0xFFFF);
setInstanceIdValue(id, value);
} else {
start.put(name, start, value);
}
}
return;
}
if (prototypeValues != null) {
int id = prototypeValues.findId(name);
if (id != 0) {
if (start == this && isSealed()) {
throw Context.reportRuntimeError1("msg.modify.sealed", name);
}
prototypeValues.set(id, start, value);
return;
}
}
super.put(name, start, value);
}
/**
* @deprecated Use {@link #getTypeTag(Class)} and {@link #convertArg(Context, Scriptable, Object,
* int)} for type convertion.
*/
public static Object convertArg(Context cx, Scriptable scope, Object arg, Class desired) {
int tag = getTypeTag(desired);
if (tag == JAVA_UNSUPPORTED_TYPE) {
throw Context.reportRuntimeError1("msg.cant.convert", desired.getName());
}
return convertArg(cx, scope, arg, tag);
}
void put(Scriptable scope, String name, Object javaObject, Object value, boolean isStatic) {
Map<String, Object> ht = isStatic ? staticMembers : members;
Object member = ht.get(name);
if (!isStatic && member == null) {
// Try to get static member from instance (LC3)
member = staticMembers.get(name);
}
if (member == null) throw reportMemberNotFound(name);
if (member instanceof FieldAndMethods) {
FieldAndMethods fam = (FieldAndMethods) ht.get(name);
member = fam.field;
}
// Is this a bean property "set"?
if (member instanceof BeanProperty) {
BeanProperty bp = (BeanProperty) member;
if (bp.setter == null) {
throw reportMemberNotFound(name);
}
// If there's only one setter or if the value is null, use the
// main setter. Otherwise, let the NativeJavaMethod decide which
// setter to use:
if (bp.setters == null || value == null) {
Class<?> setType = bp.setter.argTypes[0];
Object[] args = {Context.jsToJava(value, setType)};
try {
bp.setter.invoke(javaObject, args);
} catch (Exception ex) {
throw Context.throwAsScriptRuntimeEx(ex);
}
} else {
Object[] args = {value};
bp.setters.call(
Context.getContext(), ScriptableObject.getTopLevelScope(scope), scope, args);
}
} else {
if (!(member instanceof Field)) {
String str = (member == null) ? "msg.java.internal.private" : "msg.java.method.assign";
throw Context.reportRuntimeError1(str, name);
}
Field field = (Field) member;
Object javaValue = Context.jsToJava(value, field.getType());
try {
field.set(javaObject, javaValue);
} catch (IllegalAccessException accessEx) {
if ((field.getModifiers() & Modifier.FINAL) != 0) {
// treat Java final the same as JavaScript [[READONLY]]
return;
}
throw Context.throwAsScriptRuntimeEx(accessEx);
} catch (IllegalArgumentException argEx) {
throw Context.reportRuntimeError3(
"msg.java.internal.field.type",
value.getClass().getName(),
field,
javaObject.getClass().getName());
}
}
}
public Object execIdCall(
IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, Object[] args) {
if (f.hasTag(FTAG)) {
if (f.methodId() == Id_constructor) {
throw Context.reportRuntimeError1("msg.cant.call.indirect", "With");
}
}
throw f.unknown();
}
JavaMembers(Scriptable scope, Class<?> cl, boolean includeProtected) {
try {
Context cx = ContextFactory.getGlobal().enterContext();
ClassShutter shutter = cx.getClassShutter();
if (shutter != null && !shutter.visibleToScripts(cl.getName())) {
throw Context.reportRuntimeError1("msg.access.prohibited", cl.getName());
}
this.includePrivate = cx.hasFeature(Context.FEATURE_ENHANCED_JAVA_ACCESS);
this.members = new HashMap<String, Object>();
this.staticMembers = new HashMap<String, Object>();
this.cl = cl;
reflect(scope, includeProtected);
} finally {
Context.exit();
}
}
@Override
public Object getDefaultValue(Class<?> hint) {
if (hint == ScriptRuntime.FunctionClass) return this;
Object rval;
Class<?> type;
try {
rval = field.get(javaObject);
type = field.getType();
} catch (IllegalAccessException accEx) {
throw Context.reportRuntimeError1("msg.java.internal.private", field.getName());
}
Context cx = Context.getContext();
rval = cx.getWrapFactory().wrap(cx, this, rval, type);
if (rval instanceof Scriptable) {
rval = ((Scriptable) rval).getDefaultValue(hint);
}
return rval;
}
public Object execIdCall(
IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, Object[] args) {
if (!f.hasTag(SCRIPT_TAG)) {
return super.execIdCall(f, cx, scope, thisObj, args);
}
int id = f.methodId();
switch (id) {
case Id_constructor:
{
String source = (args.length == 0) ? "" : ScriptRuntime.toString(args[0]);
Script script = compile(cx, source);
NativeScript nscript = new NativeScript(script);
ScriptRuntime.setObjectProtoAndParent(nscript, scope);
return nscript;
}
case Id_toString:
{
NativeScript real = realThis(thisObj, f);
Script realScript = real.script;
if (realScript == null) {
return "";
}
return cx.decompileScript(realScript, 0);
}
case Id_exec:
{
throw Context.reportRuntimeError1("msg.cant.call.indirect", "exec");
}
case Id_compile:
{
NativeScript real = realThis(thisObj, f);
String source = ScriptRuntime.toString(args, 0);
real.script = compile(cx, source);
return real;
}
}
throw new IllegalArgumentException(String.valueOf(id));
}
@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;
}
/**
* Create a JavaScript function object from a Java method.
*
* <p>The <code>member</code> argument must be either a java.lang.reflect.Method
* or a java.lang.reflect.Constructor and must match one of two forms.<p>
*
* The first form is a member with zero or more parameters
* of the following types: Object, String, boolean, Scriptable,
* int, or double. The Long type is not supported
* because the double representation of a long (which is the
* EMCA-mandated storage type for Numbers) may lose precision.
* If the member is a Method, the return value must be void or one
* of the types allowed for parameters.<p>
*
* The runtime will perform appropriate conversions based
* upon the type of the parameter. A parameter type of
* Object specifies that no conversions are to be done. A parameter
* of type String will use Context.toString to convert arguments.
* Similarly, parameters of type double, boolean, and Scriptable
* will cause Context.toNumber, Context.toBoolean, and
* Context.toObject, respectively, to be called.<p>
*
* If the method is not static, the Java 'this' value will
* correspond to the JavaScript 'this' value. Any attempt
* to call the function with a 'this' value that is not
* of the right Java type will result in an error.<p>
*
* The second form is the variable arguments (or "varargs")
* form. If the FunctionObject will be used as a constructor,
* the member must have the following parameters
* <pre>
* (Context cx, Object[] args, Function ctorObj,
* boolean inNewExpr)</pre>
* and if it is a Method, be static and return an Object result.<p>
*
* Otherwise, if the FunctionObject will <i>not</i> be used to define a
* constructor, the member must be a static Method with parameters
* (Context cx, Scriptable thisObj, Object[] args,
* Function funObj) </pre>
* <pre>
* and an Object result.<p>
*
* When the function varargs form is called as part of a function call,
* the <code>args</code> parameter contains the
* arguments, with <code>thisObj</code>
* set to the JavaScript 'this' value. <code>funObj</code>
* is the function object for the invoked function.<p>
*
* When the constructor varargs form is called or invoked while evaluating
* a <code>new</code> expression, <code>args</code> contains the
* arguments, <code>ctorObj</code> refers to this FunctionObject, and
* <code>inNewExpr</code> is true if and only if a <code>new</code>
* expression caused the call. This supports defining a function that
* has different behavior when called as a constructor than when
* invoked as a normal function call. (For example, the Boolean
* constructor, when called as a function,
* will convert to boolean rather than creating a new object.)<p>
*
* @param name the name of the function
* @param methodOrConstructor a java.lang.reflect.Method or a java.lang.reflect.Constructor
* that defines the object
* @param scope enclosing scope of function
* @see gov.nbcs.rp.common.js.javascript.Scriptable
*/
public FunctionObject(String name, Member methodOrConstructor, Scriptable scope) {
if (methodOrConstructor instanceof Constructor) {
member = new MemberBox((Constructor) methodOrConstructor);
isStatic = true; // well, doesn't take a 'this'
} else {
member = new MemberBox((Method) methodOrConstructor);
isStatic = member.isStatic();
}
String methodName = member.getName();
this.functionName = name;
Class[] types = member.argTypes;
int arity = types.length;
if ((arity == 4) && (types[1].isArray() || types[2].isArray())) {
// Either variable args or an error.
if (types[1].isArray()) {
if (!isStatic
|| (types[0] != ScriptRuntime.ContextClass)
|| (types[1].getComponentType() != ScriptRuntime.ObjectClass)
|| (types[2] != ScriptRuntime.FunctionClass)
|| (types[3] != Boolean.TYPE)) {
throw Context.reportRuntimeError1("msg.varargs.ctor", methodName);
}
parmsLength = VARARGS_CTOR;
} else {
if (!isStatic
|| (types[0] != ScriptRuntime.ContextClass)
|| (types[1] != ScriptRuntime.ScriptableClass)
|| (types[2].getComponentType() != ScriptRuntime.ObjectClass)
|| (types[3] != ScriptRuntime.FunctionClass)) {
throw Context.reportRuntimeError1("msg.varargs.fun", methodName);
}
parmsLength = VARARGS_METHOD;
}
} else {
parmsLength = arity;
if (arity > 0) {
typeTags = new byte[arity];
for (int i = 0; i != arity; ++i) {
int tag = getTypeTag(types[i]);
if (tag == JAVA_UNSUPPORTED_TYPE) {
throw Context.reportRuntimeError2("msg.bad.parms", types[i].getName(), methodName);
}
typeTags[i] = (byte) tag;
}
}
}
if (member.isMethod()) {
Method method = member.method();
Class returnType = method.getReturnType();
if (returnType == Void.TYPE) {
hasVoidReturn = true;
} else {
returnTypeTag = getTypeTag(returnType);
}
} else {
Class ctorType = member.getDeclaringClass();
if (!ScriptRuntime.ScriptableClass.isAssignableFrom(ctorType)) {
throw Context.reportRuntimeError1("msg.bad.ctor.return", ctorType.getName());
}
}
ScriptRuntime.setFunctionProtoAndParent(this, scope);
}
