private Constructor<?>[] getAccessibleConstructors() {
// The JVM currently doesn't allow changing access on java.lang.Class
// constructors, so don't try
if (includePrivate && cl != ScriptRuntime.ClassClass) {
try {
Constructor<?>[] cons = cl.getDeclaredConstructors();
Constructor.setAccessible(cons, true);
return cons;
} catch (SecurityException e) {
// Fall through to !includePrivate case
Context.reportWarning(
"Could not access constructor "
+ " of class "
+ cl.getName()
+ " due to lack of privileges.");
}
}
return cl.getConstructors();
}
private void reflect(Scriptable scope, boolean includeProtected) {
// We reflect methods first, because we want overloaded field/method
// names to be allocated to the NativeJavaMethod before the field
// gets in the way.
Method[] methods = discoverAccessibleMethods(cl, includeProtected, includePrivate);
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
int mods = method.getModifiers();
boolean isStatic = Modifier.isStatic(mods);
Map<String, Object> ht = isStatic ? staticMembers : members;
String name = method.getName();
Object value = ht.get(name);
if (value == null) {
ht.put(name, method);
} else {
ObjArray overloadedMethods;
if (value instanceof ObjArray) {
overloadedMethods = (ObjArray) value;
} else {
if (!(value instanceof Method)) Kit.codeBug();
// value should be instance of Method as at this stage
// staticMembers and members can only contain methods
overloadedMethods = new ObjArray();
overloadedMethods.add(value);
ht.put(name, overloadedMethods);
}
overloadedMethods.add(method);
}
}
// replace Method instances by wrapped NativeJavaMethod objects
// first in staticMembers and then in members
for (int tableCursor = 0; tableCursor != 2; ++tableCursor) {
boolean isStatic = (tableCursor == 0);
Map<String, Object> ht = isStatic ? staticMembers : members;
for (String name : ht.keySet()) {
MemberBox[] methodBoxes;
Object value = ht.get(name);
if (value instanceof Method) {
methodBoxes = new MemberBox[1];
methodBoxes[0] = new MemberBox((Method) value);
} else {
ObjArray overloadedMethods = (ObjArray) value;
int N = overloadedMethods.size();
if (N < 2) Kit.codeBug();
methodBoxes = new MemberBox[N];
for (int i = 0; i != N; ++i) {
Method method = (Method) overloadedMethods.get(i);
methodBoxes[i] = new MemberBox(method);
}
}
NativeJavaMethod fun = new NativeJavaMethod(methodBoxes);
if (scope != null) {
ScriptRuntime.setFunctionProtoAndParent(fun, scope);
}
ht.put(name, fun);
}
}
// Reflect fields.
Field[] fields = getAccessibleFields();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
String name = field.getName();
int mods = field.getModifiers();
if (!includePrivate && !Modifier.isPublic(mods)) {
continue;
}
try {
boolean isStatic = Modifier.isStatic(mods);
Map<String, Object> ht = isStatic ? staticMembers : members;
Object member = ht.get(name);
if (member == null) {
ht.put(name, field);
} else if (member instanceof NativeJavaMethod) {
NativeJavaMethod method = (NativeJavaMethod) member;
FieldAndMethods fam = new FieldAndMethods(scope, method.methods, field);
Map<String, FieldAndMethods> fmht = isStatic ? staticFieldAndMethods : fieldAndMethods;
if (fmht == null) {
fmht = new HashMap<String, FieldAndMethods>();
if (isStatic) {
staticFieldAndMethods = fmht;
} else {
fieldAndMethods = fmht;
}
}
fmht.put(name, fam);
ht.put(name, fam);
} else if (member instanceof Field) {
Field oldField = (Field) member;
// If this newly reflected field shadows an inherited field,
// then replace it. Otherwise, since access to the field
// would be ambiguous from Java, no field should be
// reflected.
// For now, the first field found wins, unless another field
// explicitly shadows it.
if (oldField.getDeclaringClass().isAssignableFrom(field.getDeclaringClass())) {
ht.put(name, field);
}
} else {
// "unknown member type"
Kit.codeBug();
}
} catch (SecurityException e) {
// skip this field
Context.reportWarning(
"Could not access field "
+ name
+ " of class "
+ cl.getName()
+ " due to lack of privileges.");
}
}
// Create bean properties from corresponding get/set methods first for
// static members and then for instance members
for (int tableCursor = 0; tableCursor != 2; ++tableCursor) {
boolean isStatic = (tableCursor == 0);
Map<String, Object> ht = isStatic ? staticMembers : members;
Map<String, BeanProperty> toAdd = new HashMap<String, BeanProperty>();
// Now, For each member, make "bean" properties.
for (String name : ht.keySet()) {
// Is this a getter?
boolean memberIsGetMethod = name.startsWith("get");
boolean memberIsSetMethod = name.startsWith("set");
boolean memberIsIsMethod = name.startsWith("is");
if (memberIsGetMethod || memberIsIsMethod || memberIsSetMethod) {
// Double check name component.
String nameComponent = name.substring(memberIsIsMethod ? 2 : 3);
if (nameComponent.length() == 0) continue;
// Make the bean property name.
String beanPropertyName = nameComponent;
char ch0 = nameComponent.charAt(0);
if (Character.isUpperCase(ch0)) {
if (nameComponent.length() == 1) {
beanPropertyName = nameComponent.toLowerCase();
} else {
char ch1 = nameComponent.charAt(1);
if (!Character.isUpperCase(ch1)) {
beanPropertyName = Character.toLowerCase(ch0) + nameComponent.substring(1);
}
}
}
// If we already have a member by this name, don't do this
// property.
if (ht.containsKey(beanPropertyName) || toAdd.containsKey(beanPropertyName)) {
continue;
}
// Find the getter method, or if there is none, the is-
// method.
MemberBox getter = null;
getter = findGetter(isStatic, ht, "get", nameComponent);
// If there was no valid getter, check for an is- method.
if (getter == null) {
getter = findGetter(isStatic, ht, "is", nameComponent);
}
// setter
MemberBox setter = null;
NativeJavaMethod setters = null;
String setterName = "set".concat(nameComponent);
if (ht.containsKey(setterName)) {
// Is this value a method?
Object member = ht.get(setterName);
if (member instanceof NativeJavaMethod) {
NativeJavaMethod njmSet = (NativeJavaMethod) member;
if (getter != null) {
// We have a getter. Now, do we have a matching
// setter?
Class<?> type = getter.method().getReturnType();
setter = extractSetMethod(type, njmSet.methods, isStatic);
} else {
// No getter, find any set method
setter = extractSetMethod(njmSet.methods, isStatic);
}
if (njmSet.methods.length > 1) {
setters = njmSet;
}
}
}
// Make the property.
BeanProperty bp = new BeanProperty(getter, setter, setters);
toAdd.put(beanPropertyName, bp);
}
}
// Add the new bean properties.
for (String key : toAdd.keySet()) {
Object value = toAdd.get(key);
ht.put(key, value);
}
}
// Reflect constructors
Constructor<?>[] constructors = getAccessibleConstructors();
ctors = new MemberBox[constructors.length];
for (int i = 0; i != constructors.length; ++i) {
ctors[i] = new MemberBox(constructors[i]);
}
}
private static void discoverAccessibleMethods(
Class<?> clazz,
Map<MethodSignature, Method> map,
boolean includeProtected,
boolean includePrivate) {
if (Modifier.isPublic(clazz.getModifiers()) || includePrivate) {
try {
if (includeProtected || includePrivate) {
while (clazz != null) {
try {
Method[] methods = clazz.getDeclaredMethods();
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
int mods = method.getModifiers();
if (Modifier.isPublic(mods) || Modifier.isProtected(mods) || includePrivate) {
if (includePrivate) method.setAccessible(true);
map.put(new MethodSignature(method), method);
}
}
clazz = clazz.getSuperclass();
} catch (SecurityException e) {
// Some security settings (i.e., applets) disallow
// access to Class.getDeclaredMethods. Fall back to
// Class.getMethods.
Method[] methods = clazz.getMethods();
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
MethodSignature sig = new MethodSignature(method);
if (map.get(sig) == null) map.put(sig, method);
}
break; // getMethods gets superclass methods, no
// need to loop any more
}
}
} else {
Method[] methods = clazz.getMethods();
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
MethodSignature sig = new MethodSignature(method);
map.put(sig, method);
}
}
return;
} catch (SecurityException e) {
Context.reportWarning(
"Could not discover accessible methods of class "
+ clazz.getName()
+ " due to lack of privileges, "
+ "attemping superclasses/interfaces.");
// Fall through and attempt to discover superclass/interface
// methods
}
}
Class<?>[] interfaces = clazz.getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
discoverAccessibleMethods(interfaces[i], map, includeProtected, includePrivate);
}
Class<?> superclass = clazz.getSuperclass();
if (superclass != null) {
discoverAccessibleMethods(superclass, map, includeProtected, includePrivate);
}
}
