/**
* Create a default object of the given type. Prefers constructors with as few arguments as
* possible. Creates an empty proxy for interfaces.
*
* @param type type to instantiate
* @return default instance
* @throws Exception if the default instance could not be created
*/
private static Object instantiateType(Class<?> type) throws Exception {
if (type.isPrimitive()) return Defaults.defaultValue(type);
else if (type == Void.class) return null;
else if (type.isArray()) return Array.newInstance(type, 0);
else if (type.isInterface())
return Proxy.newProxyInstance(
type.getClassLoader(),
new Class[] {type},
new InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
return null;
}
});
// Take a constructor with as few params as possible
Constructor constructor = type.getDeclaredConstructors()[0];
for (Constructor<?> c : type.getDeclaredConstructors()) {
if (c.getParameterTypes().length < constructor.getParameterTypes().length) constructor = c;
}
Object[] params = new Object[constructor.getParameterTypes().length];
for (int i = 0; i < constructor.getParameterTypes().length; i++) {
params[i] = instantiateType(constructor.getParameterTypes()[i]);
}
return constructor.newInstance(params);
}
/**
* Sets up the mocks defined in the given mock class.
*
* <p>If the type {@linkplain MockClass#realClass referred to} by the mock class is actually an
* interface, then a {@linkplain #newEmptyProxy(ClassLoader, Class) new empty proxy} is created.
*
* @param mockClassOrInstance the mock class itself (given by its {@code Class} literal), or an
* instance of the mock class
* @return the new proxy instance created for the mocked interface, or {@code null} otherwise
* @throws IllegalArgumentException if a given mock class fails to specify the corresponding real
* class using the {@code @MockClass(realClass = ...)} annotation; or if a mock class defines
* a mock method for which no corresponding real method or constructor exists in the real
* class; or if the real method matching a mock method is {@code abstract}
* @see #setUpMock(Class, Object)
* @see #setUpMocks(Object...)
* @see <a
* href="http://code.google.com/p/jmockit/source/browse/trunk/main/test/mockit/MockAnnotationsTest.java#696">
* Example</a>
*/
public static <T> T setUpMock(Object mockClassOrInstance) {
Class<?> mockClass;
Object mock;
if (mockClassOrInstance instanceof Class<?>) {
mockClass = (Class<?>) mockClassOrInstance;
mock = null;
} else {
mockClass = mockClassOrInstance.getClass();
mock = mockClassOrInstance;
}
MockClassSetup setup = new MockClassSetup(mock, mockClass);
Class<?> realClass = setup.getRealClass();
T proxy = null;
if (realClass.isInterface()) {
//noinspection unchecked
proxy = (T) newEmptyProxy(mockClass.getClassLoader(), realClass);
setup.setRealClass(proxy.getClass());
}
setup.redefineMethods();
return proxy;
}
@Nullable
public InstanceFactory findInstanceFactory(@Nonnull Type mockedType) {
InstanceFactory instanceFactory = mockedTypesAndInstances.get(mockedType);
if (instanceFactory != null) {
return instanceFactory;
}
Class<?> mockedClass = getClassType(mockedType);
//noinspection ReuseOfLocalVariable
instanceFactory = mockedTypesAndInstances.get(mockedClass);
if (instanceFactory != null) {
return instanceFactory;
}
boolean abstractType = mockedClass.isInterface() || isAbstract(mockedClass.getModifiers());
for (Entry<Type, InstanceFactory> entry : mockedTypesAndInstances.entrySet()) {
Type registeredMockedType = entry.getKey();
Class<?> registeredMockedClass = getClassType(registeredMockedType);
if (abstractType) {
registeredMockedClass = getMockedClassOrInterfaceType(registeredMockedClass);
}
if (mockedClass.isAssignableFrom(registeredMockedClass)) {
instanceFactory = entry.getValue();
break;
}
}
return instanceFactory;
}
public static void validatePassivating(Class<?> cl, Bean<?> bean, String typeName) {
Class<?> beanClass = bean.getBeanClass();
if (!Serializable.class.isAssignableFrom(beanClass) && false) {
ConfigException exn =
new ConfigException(
L.l(
"{0}: {1} is an invalid {2} because it is not serializable.",
cl.getName(), bean, typeName));
throw exn;
// InjectManager.create().addDefinitionError(exn);
}
for (InjectionPoint ip : bean.getInjectionPoints()) {
if (ip.isTransient() || ip.isDelegate()) continue;
Class<?> type = getRawClass(ip.getType());
if (type.isInterface()) continue;
if (!Serializable.class.isAssignableFrom(type)) {
ConfigException exn =
new ConfigException(
L.l(
"{0}: {1} is an invalid {4} because its injection point '{2}' of type {3} is not serializable.",
cl.getName(), bean, ip.getMember().getName(), ip.getType(), typeName));
throw exn;
}
}
}
public SAMSignature(Class<SAM> samType, Class<?>[] genericTypes) {
this.samType = samType;
if (!samType.isInterface()) {
throw new LambdaException("SAM class [%s] is required to be an interface", samType.getName());
}
buildGenericTypeVariables(genericTypes);
findSamMethod();
BuildSignature();
}
public static void premain(String args, Instrumentation inst) throws Exception {
try {
String[] agentArgs;
if (args == null) agentArgs = new String[] {""};
else agentArgs = args.split(",");
if (!agentArgs[0].equals("instrumenting")) jarFileName = agentArgs[0];
BaseClassTransformer rct = null;
rct = new BaseClassTransformer();
if (agentArgs[0].equals("instrumenting")) {
initVMClasses = new HashSet<String>();
for (Class<?> c : inst.getAllLoadedClasses()) {
((Set<String>) initVMClasses).add(c.getName());
}
}
if (!agentArgs[0].equals("instrumenting")) {
inst.addTransformer(rct);
Tracer.setLocals(new CounterThreadLocal());
Tracer.overrideAll(true);
for (Class<?> c : inst.getAllLoadedClasses()) {
try {
if (c.isInterface()) continue;
if (c.isArray()) continue;
byte[] bytes = rct.getBytes(c.getName());
if (bytes == null) {
continue;
}
inst.redefineClasses(new ClassDefinition[] {new ClassDefinition(c, bytes)});
} catch (Throwable e) {
synchronized (System.err) {
System.err.println("" + c + " failed...");
e.printStackTrace();
}
}
}
Runtime.getRuntime()
.addShutdownHook(
new Thread() {
public void run() {
Tracer.mark();
try {
PrintStream ps = new PrintStream("bailout.txt");
ps.println("Bailouts: " + Tracer.getBailoutCount());
ps.close();
} catch (Exception e) {
}
Tracer.unmark();
}
});
if ("true".equals(System.getProperty("bci.observerOn"))) Tracer.overrideAll(false);
}
} catch (Exception e) {
e.printStackTrace();
}
}
static JavaMembers lookupClass(
Scriptable scope, Class<?> dynamicType, Class<?> staticType, boolean includeProtected) {
JavaMembers members;
scope = ScriptableObject.getTopLevelScope(scope);
ClassCache cache = ClassCache.get(scope);
Map<Class<?>, JavaMembers> ct = cache.getClassCacheMap();
Class<?> cl = dynamicType;
for (; ; ) {
members = ct.get(cl);
if (members != null) {
return members;
}
try {
members = new JavaMembers(scope, cl, includeProtected);
break;
} catch (SecurityException e) {
// Reflection may fail for objects that are in a restricted
// access package (e.g. sun.*). If we get a security
// exception, try again with the static type if it is interface.
// Otherwise, try superclass
if (staticType != null && staticType.isInterface()) {
cl = staticType;
staticType = null; // try staticType only once
} else {
Class<?> parent = cl.getSuperclass();
if (parent == null) {
if (cl.isInterface()) {
// last resort after failed staticType interface
parent = ScriptRuntime.ObjectClass;
} else {
throw e;
}
}
cl = parent;
}
}
}
if (cache.isCachingEnabled()) ct.put(cl, members);
return members;
}
private T newContextObject() {
try {
if (type.isInterface()) {
return (T) Classes.newDynamicProxy(type);
} else {
return (T) type.newInstance();
}
} catch (Exception anExc) {
throw new XmlReadingException(anExc);
}
}
public <T> T getInterface(Object thiz, Class<T> iface) throws ScriptException {
if (iface == null || !iface.isInterface()) {
throw new IllegalArgumentException("interface Class expected");
}
AccessControlContext accCtxt = AccessController.getContext();
return iface.cast(
Proxy.newProxyInstance(
iface.getClassLoader(),
new Class[] {iface},
new InterfaceImplementorInvocationHandler(thiz, accCtxt)));
}
public static PropertyDescriptor[] getPropertyDescriptors(Class<?> objectClass) {
// If the class is an interface, use custom method to get all prop descriptors in the
// inheritance hierarchy.
// PropertyUtils.getPropertyDescriptors() does not work correctly for interface inheritance. It
// finds props in the
// actual interface ok, but does not find props in the inheritance hierarchy.
if (objectClass.isInterface()) {
return getInterfacePropertyDescriptors(objectClass);
} else {
return BeanUtils.getPropertyDescriptors(objectClass);
}
}
TestedField(
@Nonnull InjectionState injectionState, @Nonnull Field field, @Nonnull Tested metadata) {
this.injectionState = injectionState;
testedField = field;
this.metadata = metadata;
fullInjection = metadata.fullyInitialized() ? new FullInjection(injectionState) : null;
Class<?> fieldType = field.getType();
if (fieldType.isInterface()) {
testedObjectCreation = null;
} else {
testedObjectCreation = new TestedObjectCreation(injectionState, fullInjection, field);
injectionState.lifecycleMethods.findLifecycleMethods(fieldType);
}
}
private static void checkTypeAndAnnotations(Binder binder, Class<?> type) {
if (!type.isInterface()) {
binder.addError("Type %s must be an interface", type);
}
if (!Finders.class.isAssignableFrom(type)) {
binder.addError("Type %s must be annotated with %s", type, Finders.class);
}
for (Method method : type.getMethods()) {
if (!method.isAnnotationPresent(Finder.class)) {
binder.addError("Method %s must be annotated with %s", method, Finder.class);
}
if (method.getReturnType() != Iterator.class) {
binder.addError("Method %s must return an %s", method, Iterator.class);
} else if (!resultType(method).isInterface()) {
binder.addError("%s must be an interface on method %s", resultType(method), method);
}
}
}
static Object js_createAdpter(Context cx, Scriptable scope, Object[] args) {
int N = args.length;
if (N == 0) {
throw ScriptRuntime.typeError0("msg.adapter.zero.args");
}
Class superClass = null;
Class[] intfs = new Class[N - 1];
int interfaceCount = 0;
for (int i = 0; i != N - 1; ++i) {
Object arg = args[i];
if (!(arg instanceof NativeJavaClass)) {
throw ScriptRuntime.typeError2(
"msg.not.java.class.arg", String.valueOf(i), ScriptRuntime.toString(arg));
}
Class c = ((NativeJavaClass) arg).getClassObject();
if (!c.isInterface()) {
if (superClass != null) {
throw ScriptRuntime.typeError2("msg.only.one.super", superClass.getName(), c.getName());
}
superClass = c;
} else {
intfs[interfaceCount++] = c;
}
}
if (superClass == null) superClass = ScriptRuntime.ObjectClass;
Class[] interfaces = new Class[interfaceCount];
System.arraycopy(intfs, 0, interfaces, 0, interfaceCount);
Scriptable obj = ScriptRuntime.toObject(cx, scope, args[N - 1]);
Class adapterClass = getAdapterClass(scope, superClass, interfaces, obj);
Class[] ctorParms = {ScriptRuntime.ContextFactoryClass, ScriptRuntime.ScriptableClass};
Object[] ctorArgs = {cx.getFactory(), obj};
try {
Object adapter = adapterClass.getConstructor(ctorParms).newInstance(ctorArgs);
return getAdapterSelf(adapterClass, adapter);
} catch (Exception ex) {
throw Context.throwAsScriptRuntimeEx(ex);
}
}
/**
* Return true if the type is not abstract and not an interface, and has a constructor annotated
* with {@link Inject} or its only constructor is the default constructor.
*
* @param type A class type
* @return True if the class type is instantiable
*/
public static boolean isInstantiable(Class<?> type) {
if (!Modifier.isAbstract(type.getModifiers()) && !type.isInterface()) {
// first check for a constructor annotated with @Inject,
// - this doesn't care how many we'll let the injector complain
// if there are more than one
for (Constructor<?> c : type.getDeclaredConstructors()) {
if (c.getAnnotation(Inject.class) != null) {
return true;
}
}
// check if we only have the public default constructor
if (type.getConstructors().length == 1
&& type.getConstructors()[0].getParameterTypes().length == 0) {
return true;
}
}
// no constructor available
return false;
}
/**
* Return the type distance between the child and parent types. The child type must be a subtype
* of the parent. The type distance between a class and itself is 0; the distance from a class to
* one of its immediate supertypes (superclass or a directly implemented interface) is 1; deeper
* distances are computed recursively.
*
* @param child The child type
* @param parent The parent type
* @return The type distance
* @throws IllegalArgumentException if {@code child} is not a subtype of {@code parent}.
*/
public static int getTypeDistance(@Nonnull Class<?> child, @Nonnull Class<?> parent) {
Preconditions.notNull("child class", child);
Preconditions.notNull("parent class", parent);
if (child.equals(parent)) {
// fast-path same-class tests
return 0;
} else if (!parent.isAssignableFrom(child)) {
// if child does not extend from the parent, return -1
throw new IllegalArgumentException("child not a subclass of parent");
} else if (!parent.isInterface()) {
// if the parent is not an interface, we only need to follower superclasses
int distance = 0;
Class<?> cur = child;
while (!cur.equals(parent)) {
distance++;
cur = cur.getSuperclass();
}
return distance;
} else {
// worst case, recursively compute the type
// recursion is safe, as types aren't too deep except in crazy-land
int minDepth = Integer.MAX_VALUE;
Class<?> sup = child.getSuperclass();
if (sup != null && parent.isAssignableFrom(sup)) {
minDepth = getTypeDistance(sup, parent);
}
for (Class<?> iface : child.getInterfaces()) {
if (parent.isAssignableFrom(iface)) {
int d = getTypeDistance(iface, parent);
if (d < minDepth) {
minDepth = d;
}
}
}
// minDepth now holds the depth of the superclass with shallowest depth
return minDepth + 1;
}
}
// Other notes to implementors:
// <p>
// No stable mapping is promised between the single-method interface and
// the implementation class C. Over time, several implementation
// classes might be used for the same type.
// <p>
// If the implementation is able
// to prove that a wrapper of the required type
// has already been created for a given
// method handle, or for another method handle with the
// same behavior, the implementation may return that wrapper in place of
// a new wrapper.
// <p>
// This method is designed to apply to common use cases
// where a single method handle must interoperate with
// an interface that implements a function-like
// API. Additional variations, such as single-abstract-method classes with
// private constructors, or interfaces with multiple but related
// entry points, must be covered by hand-written or automatically
// generated adapter classes.
//
public static <T> T asInterfaceInstance(final Class<T> intfc, final MethodHandle target) {
if (!intfc.isInterface() || !Modifier.isPublic(intfc.getModifiers()))
throw new IllegalArgumentException("not a public interface: " + intfc.getName());
final Method[] methods = getSingleNameMethods(intfc);
if (methods == null)
throw new IllegalArgumentException("not a single-method interface: " + intfc.getName());
final MethodHandle[] vaTargets = new MethodHandle[methods.length];
for (int i = 0; i < methods.length; i++) {
Method sm = methods[i];
MethodType smMT = MethodType.methodType(sm.getReturnType(), sm.getParameterTypes());
MethodHandle checkTarget = target.asType(smMT); // make throw WMT
checkTarget = checkTarget.asType(checkTarget.type().changeReturnType(Object.class));
vaTargets[i] = checkTarget.asSpreader(Object[].class, smMT.parameterCount());
}
return intfc.cast(
Proxy.newProxyInstance(
intfc.getClassLoader(),
new Class[] {intfc, WrapperInstance.class},
new InvocationHandler() {
private Object getArg(String name) {
if ((Object) name == "getWrapperInstanceTarget") return target;
if ((Object) name == "getWrapperInstanceType") return intfc;
throw new AssertionError();
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
for (int i = 0; i < methods.length; i++) {
if (method.equals(methods[i])) return vaTargets[i].invokeExact(args);
}
if (method.getDeclaringClass() == WrapperInstance.class)
return getArg(method.getName());
if (isObjectMethod(method)) return callObjectMethod(this, method, args);
throw new InternalError("bad proxy method: " + method);
}
}));
}
private boolean isInterface() {
return declaringClass.isInterface();
}
public Type navigateParameterized(String name, Type[] params) throws OclTypeException {
Type ret = Basic.navigateAnyParameterized(name, params);
if (ret != null) return ret;
Method foundmethod = null;
// this is very similar to tudresden.ocl.lib.OclAnyImpl.findMethod
// if you find a bug here, its probably there as well.
// suprisingly one has not to go after interfaces since methods
// inherited from interfaces are automatically included into the
// implementing class. This does not happen for methods inherited
// from the superclass, so we have to ascend to all superclasses.
// unfortunately the above is only true for classes, getSuperclass invoked
// on an interface returns null, regardless of the interfaces extended by the
// interface. Therefore, we need to check out getInterfaces() if iclass is
// an interface
HashSet hsVisited = new HashSet();
LinkedList llToVisit = new LinkedList();
if (c.isInterface()) {
// as we're dealing with actual instances, it can be assumed that Object is
// a superclass
llToVisit.add(java.lang.Object.class);
}
classloop:
for (Class iclass = c; iclass != null; ) // iclass=iclass.getSuperclass())
{
Method[] methods = iclass.getDeclaredMethods();
methodloop:
for (int i = 0; i < methods.length; i++) {
if (!name.equals(methods[i].getName())) continue methodloop;
Class[] methodparams = methods[i].getParameterTypes();
if (params.length != methodparams.length) continue methodloop;
System.err.print("Checking method " + name + " (");
for (int j = 0; j < methodparams.length; j++) {
if (j != 0) {
System.err.print(", ");
}
System.err.print(methodparams[j]);
}
System.err.println(")");
for (int j = 0; j < params.length; j++)
if (!params[j].conformsTo(getTypeForClass(methodparams[j]))) {
System.err.println("No conformance for paramter # " + j);
continue methodloop;
}
if (foundmethod == null) foundmethod = methods[i];
else throw new OclTypeException("ambigious method " + name + " of " + c + ") queried.");
break classloop;
}
// determine classes to be visited
if (iclass.isInterface()) {
Class[] ca = iclass.getInterfaces();
for (int i = 0; i < ca.length; i++) {
if (!hsVisited.contains(ca[i])) {
llToVisit.add(ca[i]);
}
}
} else {
if (!hsVisited.contains(iclass.getSuperclass())) {
llToVisit.add(iclass.getSuperclass());
}
}
// mark current class visited
hsVisited.add(iclass);
// go to next class
if (!llToVisit.isEmpty()) {
iclass = (Class) llToVisit.remove(0);
} else {
iclass = null;
}
}
if (foundmethod == null) {
StringBuffer sb = new StringBuffer();
sb.append(c.toString() + " has no method " + name + " with parameters (");
for (int i = 0; i < params.length; i++) {
if (i != 0) sb.append(", ");
sb.append(params[i] + "/" + params[i]);
}
sb.append(")");
throw new OclTypeException(sb.toString());
}
return getTypeForClass(foundmethod.getReturnType());
}
/**
* Return true if the type is not abstract and not an interface. This will return true essentially
* when the class "should" have a default constructor or a constructor annotated with {@link
* Inject @Inject} to be used properly.
*
* <p>As another special rule, if the input type is {@link Void}, false is returned because for
* most intents and purposes, it is not instantiable.
*
* @param type The type to test
* @return True if it should be instantiable
*/
public static boolean shouldBeInstantiable(Class<?> type) {
return !Modifier.isAbstract(type.getModifiers())
&& !type.isInterface()
&& !Void.class.equals(type);
}
private void writeCollection(
final OutputStream outputStream,
final Type collectionType,
final Collection<?> collection,
final QName outerTagName) {
final Class<?> rawType;
if (collectionType instanceof ParameterizedType) {
final ParameterizedType returnType = (ParameterizedType) collectionType;
rawType = (Class<?>) returnType.getRawType();
} else if (collectionType instanceof Class<?>) {
rawType = (Class<?>) collectionType;
} else if (collectionType instanceof WildcardType) {
final Type[] UpperBounds = ((WildcardType) collectionType).getUpperBounds();
if (UpperBounds.length > 0) {
rawType = (Class<?>) UpperBounds[0];
} else {
rawType = Object.class;
}
} else if (collectionType instanceof TypeVariable) {
final Type[] UpperBounds = ((TypeVariable<?>) collectionType).getBounds();
if (UpperBounds.length > 0) {
rawType = (Class<?>) UpperBounds[0];
} else {
rawType = Object.class;
}
} else {
throw new IllegalArgumentException("Unsupported type variable");
}
Class<?> elementType;
if (Collection.class.isAssignableFrom(rawType)) {
final Type[] paramTypes = Types.getTypeParametersFor(Collection.class, collectionType);
elementType = Types.toRawType(paramTypes[0]);
if (elementType.isInterface()) {
// interfaces not supported by jaxb
elementType = Types.commonAncestor(collection);
}
} else {
elementType = Types.commonAncestor(collection);
}
try {
// As long as JAXB is an option, we have to know that this is a StAXWriter as JAXB needs to
// write to that.
try (XmlWriter xmlWriter = XmlStreaming.newWriter(outputStream, "UTF-8")) {
Marshaller marshaller = null;
XmlWriterUtil.smartStartTag(xmlWriter, outerTagName);
for (Object item : collection) {
if (item != null) {
if (item instanceof XmlSerializable) {
((XmlSerializable) item).serialize(xmlWriter);
} else if (item instanceof Node) {
XmlWriterUtil.serialize(xmlWriter, (Node) item);
} else {
if (marshaller == null) {
JAXBContext jaxbcontext = null;
if (elementType == null) {
jaxbcontext = newJAXBContext(JAXBCollectionWrapper.class);
} else {
jaxbcontext = newJAXBContext(JAXBCollectionWrapper.class, elementType);
}
marshaller = jaxbcontext.createMarshaller();
}
marshaller.marshal(item, (XMLStreamWriter) getDelegateMethod().invoke(xmlWriter));
}
}
}
XmlWriterUtil.endTag(xmlWriter, outerTagName);
}
} catch (Throwable e) {
throw new MessagingException(e);
}
}
@Override
public boolean isInterface() {
return clazz.isInterface();
}
/**
* Derive a ranking based on how "natural" the conversion is. The special value CONVERSION_NONE
* means no conversion is possible, and CONVERSION_NONTRIVIAL signals that more type conformance
* testing is required. Based on <a
* href="http://www.mozilla.org/js/liveconnect/lc3_method_overloading.html">"preferred method
* conversions" from Live Connect 3</a>
*/
static int getConversionWeight(Object fromObj, Class<?> to) {
int fromCode = getJSTypeCode(fromObj);
switch (fromCode) {
case JSTYPE_UNDEFINED:
if (to == ScriptRuntime.StringClass || to == ScriptRuntime.ObjectClass) {
return 1;
}
break;
case JSTYPE_NULL:
if (!to.isPrimitive()) {
return 1;
}
break;
case JSTYPE_BOOLEAN:
// "boolean" is #1
if (to == Boolean.TYPE) {
return 1;
} else if (to == ScriptRuntime.BooleanClass) {
return 2;
} else if (to == ScriptRuntime.ObjectClass) {
return 3;
} else if (to == ScriptRuntime.StringClass) {
return 4;
}
break;
case JSTYPE_NUMBER:
if (to.isPrimitive()) {
if (to == Double.TYPE) {
return 1;
} else if (to != Boolean.TYPE) {
return 1 + getSizeRank(to);
}
} else {
if (to == ScriptRuntime.StringClass) {
// native numbers are #1-8
return 9;
} else if (to == ScriptRuntime.ObjectClass) {
return 10;
} else if (ScriptRuntime.NumberClass.isAssignableFrom(to)) {
// "double" is #1
return 2;
}
}
break;
case JSTYPE_STRING:
if (to == ScriptRuntime.StringClass) {
return 1;
} else if (to.isInstance(fromObj)) {
return 2;
} else if (to.isPrimitive()) {
if (to == Character.TYPE) {
return 3;
} else if (to != Boolean.TYPE) {
return 4;
}
}
break;
case JSTYPE_JAVA_CLASS:
if (to == ScriptRuntime.ClassClass) {
return 1;
} else if (to == ScriptRuntime.ObjectClass) {
return 3;
} else if (to == ScriptRuntime.StringClass) {
return 4;
}
break;
case JSTYPE_JAVA_OBJECT:
case JSTYPE_JAVA_ARRAY:
Object javaObj = fromObj;
if (javaObj instanceof Wrapper) {
javaObj = ((Wrapper) javaObj).unwrap();
}
if (to.isInstance(javaObj)) {
return CONVERSION_NONTRIVIAL;
}
if (to == ScriptRuntime.StringClass) {
return 2;
} else if (to.isPrimitive() && to != Boolean.TYPE) {
return (fromCode == JSTYPE_JAVA_ARRAY) ? CONVERSION_NONE : 2 + getSizeRank(to);
}
break;
case JSTYPE_OBJECT:
// Other objects takes #1-#3 spots
if (to == fromObj.getClass()) {
// No conversion required
return 1;
}
if (to.isArray()) {
if (fromObj instanceof NativeArray) {
// This is a native array conversion to a java array
// Array conversions are all equal, and preferable to object
// and string conversion, per LC3.
return 1;
}
} else if (to == ScriptRuntime.ObjectClass) {
return 2;
} else if (to == ScriptRuntime.StringClass) {
return 3;
} else if (to == ScriptRuntime.DateClass) {
if (fromObj instanceof NativeDate) {
// This is a native date to java date conversion
return 1;
}
} else if (to.isInterface()) {
if (fromObj instanceof Function) {
// See comments in coerceType
if (to.getMethods().length == 1) {
return 1;
}
}
return 11;
} else if (to.isPrimitive() && to != Boolean.TYPE) {
return 3 + getSizeRank(to);
}
break;
}
return CONVERSION_NONE;
}
/**
* Gets the actual type arguments that are used in a given implementation of a given generic base
* class or interface. (Based on code copyright 2007 by Ian Robertson).
*
* @param base the generic base class or interface
* @param implementation the type (potentially) implementing the given base class or interface
* @return a list of the raw classes for the actual type arguments.
*/
@NotNull
public static List<Class<?>> getTypeArguments(
@NotNull Class<?> base, @NotNull Class<?> implementation) {
Map<Type, Type> resolvedTypes = new HashMap<Type, Type>();
// first we need to resolve all supertypes up to the required base class or interface
// and find the right Type for it
Type type;
Queue<Type> toCheck = new LinkedList<Type>();
toCheck.add(implementation);
while (true) {
// if we have checked everything and not found the base class we return an empty list
if (toCheck.isEmpty()) return ImmutableList.of();
type = toCheck.remove();
Class<?> clazz;
if (type instanceof Class) {
// there is no useful information for us in raw types, so just keep going up the inheritance
// chain
clazz = (Class) type;
if (base.isInterface()) {
// if we are actually looking for the type parameters to an interface we also need to
// look at all the ones implemented by the given current one
toCheck.addAll(Arrays.asList(clazz.getGenericInterfaces()));
}
} else if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
clazz = (Class) parameterizedType.getRawType();
// for instances of ParameterizedType we extract and remember all type arguments
TypeVariable<?>[] typeParameters = clazz.getTypeParameters();
Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
for (int i = 0; i < actualTypeArguments.length; i++) {
resolvedTypes.put(typeParameters[i], actualTypeArguments[i]);
}
} else {
return ImmutableList.of();
}
// we can stop if we have reached the sought for base type
if (base.equals(getClass(type))) break;
toCheck.add(clazz.getGenericSuperclass());
}
// finally, for each actual type argument provided to baseClass,
// determine (if possible) the raw class for that type argument.
Type[] actualTypeArguments;
if (type instanceof Class) {
actualTypeArguments = ((Class) type).getTypeParameters();
} else {
actualTypeArguments = ((ParameterizedType) type).getActualTypeArguments();
}
List<Class<?>> typeArgumentsAsClasses = new ArrayList<Class<?>>();
// resolve types by chasing down type variables.
for (Type baseType : actualTypeArguments) {
while (resolvedTypes.containsKey(baseType)) {
baseType = resolvedTypes.get(baseType);
}
typeArgumentsAsClasses.add(getClass(baseType));
}
return typeArgumentsAsClasses;
}
/** Type-munging for field setting and method invocation. Conforms to LC3 specification */
static Object coerceTypeImpl(Class<?> type, Object value) {
if (value != null && value.getClass() == type) {
return value;
}
switch (getJSTypeCode(value)) {
case JSTYPE_NULL:
// raise error if type.isPrimitive()
if (type.isPrimitive()) {
reportConversionError(value, type);
}
return null;
case JSTYPE_UNDEFINED:
if (type == ScriptRuntime.StringClass || type == ScriptRuntime.ObjectClass) {
return "undefined";
} else {
reportConversionError("undefined", type);
}
break;
case JSTYPE_BOOLEAN:
// Under LC3, only JS Booleans can be coerced into a Boolean value
if (type == Boolean.TYPE
|| type == ScriptRuntime.BooleanClass
|| type == ScriptRuntime.ObjectClass) {
return value;
} else if (type == ScriptRuntime.StringClass) {
return value.toString();
} else {
reportConversionError(value, type);
}
break;
case JSTYPE_NUMBER:
if (type == ScriptRuntime.StringClass) {
return ScriptRuntime.toString(value);
} else if (type == ScriptRuntime.ObjectClass) {
return coerceToNumber(Double.TYPE, value);
} else if ((type.isPrimitive() && type != Boolean.TYPE)
|| ScriptRuntime.NumberClass.isAssignableFrom(type)) {
return coerceToNumber(type, value);
} else {
reportConversionError(value, type);
}
break;
case JSTYPE_STRING:
if (type == ScriptRuntime.StringClass || type.isInstance(value)) {
return value;
} else if (type == Character.TYPE || type == ScriptRuntime.CharacterClass) {
// Special case for converting a single char string to a
// character
// Placed here because it applies *only* to JS strings,
// not other JS objects converted to strings
if (((String) value).length() == 1) {
return new Character(((String) value).charAt(0));
} else {
return coerceToNumber(type, value);
}
} else if ((type.isPrimitive() && type != Boolean.TYPE)
|| ScriptRuntime.NumberClass.isAssignableFrom(type)) {
return coerceToNumber(type, value);
} else {
reportConversionError(value, type);
}
break;
case JSTYPE_JAVA_CLASS:
if (value instanceof Wrapper) {
value = ((Wrapper) value).unwrap();
}
if (type == ScriptRuntime.ClassClass || type == ScriptRuntime.ObjectClass) {
return value;
} else if (type == ScriptRuntime.StringClass) {
return value.toString();
} else {
reportConversionError(value, type);
}
break;
case JSTYPE_JAVA_OBJECT:
case JSTYPE_JAVA_ARRAY:
if (value instanceof Wrapper) {
value = ((Wrapper) value).unwrap();
}
if (type.isPrimitive()) {
if (type == Boolean.TYPE) {
reportConversionError(value, type);
}
return coerceToNumber(type, value);
} else {
if (type == ScriptRuntime.StringClass) {
return value.toString();
} else {
if (type.isInstance(value)) {
return value;
} else {
reportConversionError(value, type);
}
}
}
break;
case JSTYPE_OBJECT:
if (type == ScriptRuntime.StringClass) {
return ScriptRuntime.toString(value);
} else if (type.isPrimitive()) {
if (type == Boolean.TYPE) {
reportConversionError(value, type);
}
return coerceToNumber(type, value);
} else if (type.isInstance(value)) {
return value;
} else if (type == ScriptRuntime.DateClass && value instanceof NativeDate) {
double time = ((NativeDate) value).getJSTimeValue();
// XXX: This will replace NaN by 0
return new Date((long) time);
} else if (type.isArray() && value instanceof NativeArray) {
// Make a new java array, and coerce the JS array components
// to the target (component) type.
NativeArray array = (NativeArray) value;
long length = array.getLength();
Class<?> arrayType = type.getComponentType();
Object Result = Array.newInstance(arrayType, (int) length);
for (int i = 0; i < length; ++i) {
try {
Array.set(Result, i, coerceType(arrayType, array.get(i, array)));
} catch (EvaluatorException ee) {
reportConversionError(value, type);
}
}
return Result;
} else if (value instanceof Wrapper) {
value = ((Wrapper) value).unwrap();
if (type.isInstance(value)) return value;
reportConversionError(value, type);
} else if (type.isInterface() && value instanceof Callable) {
// Try to use function as implementation of Java interface.
//
// XXX: Currently only instances of ScriptableObject are
// supported since the resulting interface proxies should
// be reused next time conversion is made and generic
// Callable has no storage for it. Weak references can
// address it but for now use this restriction.
if (value instanceof ScriptableObject) {
ScriptableObject so = (ScriptableObject) value;
Object key = Kit.makeHashKeyFromPair(COERCED_INTERFACE_KEY, type);
Object old = so.getAssociatedValue(key);
if (old != null) {
// Function was already wrapped
return old;
}
Context cx = Context.getContext();
Object glue = InterfaceAdapter.create(cx, type, (Callable) value);
// Store for later retrival
glue = so.associateValue(key, glue);
return glue;
}
reportConversionError(value, type);
} else {
reportConversionError(value, type);
}
break;
}
return value;
}
static Object js_createAdapter(Context cx, Scriptable scope, Object[] args) {
int N = args.length;
if (N == 0) {
throw ScriptRuntime.typeError0("msg.adapter.zero.args");
}
// Expected arguments:
// Any number of NativeJavaClass objects representing the super-class
// and/or interfaces to implement, followed by one NativeObject providing
// the implementation, followed by any number of arguments to pass on
// to the (super-class) constructor.
int classCount;
for (classCount = 0; classCount < N - 1; classCount++) {
Object arg = args[classCount];
// We explicitly test for NativeObject here since checking for
// instanceof ScriptableObject or !(instanceof NativeJavaClass)
// would fail for a Java class that isn't found in the class path
// as NativeJavaPackage extends ScriptableObject.
if (arg instanceof NativeObject) {
break;
}
if (!(arg instanceof NativeJavaClass)) {
throw ScriptRuntime.typeError2(
"msg.not.java.class.arg", String.valueOf(classCount), ScriptRuntime.toString(arg));
}
}
Class<?> superClass = null;
Class<?>[] intfs = new Class[classCount];
int interfaceCount = 0;
for (int i = 0; i < classCount; ++i) {
Class<?> c = ((NativeJavaClass) args[i]).getClassObject();
if (!c.isInterface()) {
if (superClass != null) {
throw ScriptRuntime.typeError2("msg.only.one.super", superClass.getName(), c.getName());
}
superClass = c;
} else {
intfs[interfaceCount++] = c;
}
}
if (superClass == null) {
superClass = ScriptRuntime.ObjectClass;
}
Class<?>[] interfaces = new Class[interfaceCount];
System.arraycopy(intfs, 0, interfaces, 0, interfaceCount);
// next argument is implementation, must be scriptable
Scriptable obj = ScriptableObject.ensureScriptable(args[classCount]);
Class<?> adapterClass = getAdapterClass(scope, superClass, interfaces, obj);
Object adapter;
int argsCount = N - classCount - 1;
try {
if (argsCount > 0) {
// Arguments contain parameters for super-class constructor.
// We use the generic Java method lookup logic to find and
// invoke the right constructor.
Object[] ctorArgs = new Object[argsCount + 2];
ctorArgs[0] = obj;
ctorArgs[1] = cx.getFactory();
System.arraycopy(args, classCount + 1, ctorArgs, 2, argsCount);
// TODO: cache class wrapper?
NativeJavaClass classWrapper = new NativeJavaClass(scope, adapterClass, true);
NativeJavaMethod ctors = classWrapper.members.ctors;
int index = ctors.findCachedFunction(cx, ctorArgs);
if (index < 0) {
String sig = NativeJavaMethod.scriptSignature(args);
throw Context.reportRuntimeError2("msg.no.java.ctor", adapterClass.getName(), sig);
}
// Found the constructor, so try invoking it.
adapter = NativeJavaClass.constructInternal(ctorArgs, ctors.methods[index]);
} else {
Class<?>[] ctorParms = {ScriptRuntime.ScriptableClass, ScriptRuntime.ContextFactoryClass};
Object[] ctorArgs = {obj, cx.getFactory()};
adapter = adapterClass.getConstructor(ctorParms).newInstance(ctorArgs);
}
Object self = getAdapterSelf(adapterClass, adapter);
// Return unwrapped JavaAdapter if it implements Scriptable
if (self instanceof Wrapper) {
Object unwrapped = ((Wrapper) self).unwrap();
if (unwrapped instanceof Scriptable) {
if (unwrapped instanceof ScriptableObject) {
ScriptRuntime.setObjectProtoAndParent((ScriptableObject) unwrapped, scope);
}
return unwrapped;
}
}
return self;
} catch (Exception ex) {
throw Context.throwAsScriptRuntimeEx(ex);
}
}
