/**
* Determines the key type for a Map.
*
* @param type The parametrized type.
* @param path The path to the type, used in exception message.
* @return The key type.
*/
public static Type[] mapTypes(Type type, String path) {
if (type instanceof Class) {
Class c = (Class) type;
type = c.getGenericSuperclass();
if (!(isGenericMap(type))) {
Type[] types = c.getGenericInterfaces();
if (types != null && types.length > 0) {
for (Type t : types) {
if (isGenericMap(t)) {
type = t;
break;
}
}
}
}
}
if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
Class<?> rawType = (Class<?>) parameterizedType.getRawType();
if (Map.class.isAssignableFrom(rawType)) {
return parameterizedType.getActualTypeArguments();
}
}
throw new CollectionExpressionException(
"The method or member ["
+ path
+ "] returns a simple Map. Unable to determine the "
+ "types of the Map. Please make this method or member generic so that the correct type can be determined.");
}
@Override
public <T> void extract(ModelSchemaExtractionContext<T> extractionContext) {
Type type = extractionContext.getType().getType();
if (!(type instanceof Class)) {
return;
}
Class<?> contractType = (Class<?>) type;
if (!contractType.isInterface()) {
return;
}
if (contractType.getGenericInterfaces().length != 1) {
return;
}
Type superType = contractType.getGenericInterfaces()[0];
if (!(superType instanceof ParameterizedType)) {
return;
}
ParameterizedType parameterizedSuperType = (ParameterizedType) superType;
if (!parameterizedSuperType.getRawType().equals(ModelMap.class)) {
return;
}
ModelType<?> elementType = ModelType.of(parameterizedSuperType.getActualTypeArguments()[0]);
Class<?> proxyImpl = generator.generate(ModelMapGroovyDecorator.Managed.class, contractType);
extractionContext.found(
new SpecializedMapSchema<T>(extractionContext.getType(), elementType, proxyImpl));
}
public static boolean isAssignableFrom(
Class<?> rawType1, Type[] actualTypeArguments1, Type type2) {
if (type2 instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type2;
if (parameterizedType.getRawType() instanceof Class<?>) {
if (isAssignableFrom(
rawType1,
actualTypeArguments1,
(Class<?>) parameterizedType.getRawType(),
parameterizedType.getActualTypeArguments())) {
return true;
}
}
} else if (type2 instanceof Class<?>) {
Class<?> clazz = (Class<?>) type2;
if (isAssignableFrom(rawType1, actualTypeArguments1, clazz, EMPTY_TYPES)) {
return true;
}
} else if (type2 instanceof TypeVariable<?>) {
TypeVariable<?> typeVariable = (TypeVariable<?>) type2;
if (isTypeBounded(rawType1, actualTypeArguments1, typeVariable.getBounds())) {
return true;
}
}
return false;
}
private Object convert(
Type targetType, Object sourceObject, Action<? super SourceObjectMapping> mapping) {
if (targetType instanceof ParameterizedType) {
ParameterizedType parameterizedTargetType = (ParameterizedType) targetType;
if (parameterizedTargetType.getRawType() instanceof Class) {
Class<?> rawClass = (Class<?>) parameterizedTargetType.getRawType();
if (Iterable.class.isAssignableFrom(rawClass)) {
Type targetElementType = getElementType(parameterizedTargetType, 0);
return convertCollectionInternal(
rawClass, targetElementType, (Iterable<?>) sourceObject, mapping);
}
if (Map.class.isAssignableFrom(rawClass)) {
Type targetKeyType = getElementType(parameterizedTargetType, 0);
Type targetValueType = getElementType(parameterizedTargetType, 1);
return convertMap(
rawClass, targetKeyType, targetValueType, (Map<?, ?>) sourceObject, mapping);
}
}
}
if (targetType instanceof Class) {
if (((Class) targetType).isPrimitive()) {
return sourceObject;
}
return adapt((Class) targetType, sourceObject, mapping);
}
throw new UnsupportedOperationException(
String.format("Cannot convert object of %s to %s.", sourceObject.getClass(), targetType));
}
private static boolean isCollection(Type type) {
if (type instanceof ParameterizedType) {
ParameterizedType ptype = (ParameterizedType) type;
return Collection.class.isAssignableFrom((Class<?>) ptype.getRawType())
|| Map.class.isAssignableFrom((Class<?>) ptype.getRawType());
}
return Collection.class.isAssignableFrom((Class<?>) type);
}
private static ClassTypePair resolveTypeVariable(
ParameterizedType pt, Class c, Class dc, TypeVariable tv, Map<TypeVariable, Type> map) {
Type[] typeArguments = pt.getActualTypeArguments();
TypeVariable[] typeParameters = c.getTypeParameters();
Map<TypeVariable, Type> submap = new HashMap<TypeVariable, Type>();
for (int i = 0; i < typeArguments.length; i++) {
// Substitute a type variable with the Java class
if (typeArguments[i] instanceof TypeVariable) {
Type t = map.get(typeArguments[i]);
submap.put(typeParameters[i], t);
} else {
submap.put(typeParameters[i], typeArguments[i]);
}
}
if (c == dc) {
Type t = submap.get(tv);
if (t instanceof Class) {
return new ClassTypePair((Class) t);
} else if (t instanceof GenericArrayType) {
t = ((GenericArrayType) t).getGenericComponentType();
if (t instanceof Class) {
c = (Class) t;
try {
return new ClassTypePair(getArrayClass(c));
} catch (Exception e) {
}
return null;
} else if (t instanceof ParameterizedType) {
Type rt = ((ParameterizedType) t).getRawType();
if (rt instanceof Class) {
c = (Class) rt;
} else {
return null;
}
try {
return new ClassTypePair(getArrayClass(c), t);
} catch (Exception e) {
return null;
}
} else {
return null;
}
} else if (t instanceof ParameterizedType) {
pt = (ParameterizedType) t;
if (pt.getRawType() instanceof Class) {
return new ClassTypePair((Class) pt.getRawType(), pt);
} else return null;
} else {
return null;
}
} else {
return resolveTypeVariable(c, dc, tv, submap);
}
}
private void addType(Type cls, boolean allowArray) {
if (cls instanceof Class) {
if (globalAdapters.contains(cls)) {
return;
}
if (((Class<?>) cls).isArray() && !allowArray) {
addClass(((Class<?>) cls).getComponentType());
} else {
addClass((Class<?>) cls);
}
} else if (cls instanceof ParameterizedType) {
final ParameterizedType parameterizedType = (ParameterizedType) cls;
addType(parameterizedType.getRawType());
if (!parameterizedType.getRawType().equals(Enum.class)) {
for (Type t2 : parameterizedType.getActualTypeArguments()) {
if (shouldTypeBeAdded(t2, parameterizedType)) {
addType(t2);
}
}
}
} else if (cls instanceof GenericArrayType) {
Class<?> ct;
GenericArrayType gt = (GenericArrayType) cls;
Type componentType = gt.getGenericComponentType();
if (componentType instanceof Class) {
ct = (Class<?>) componentType;
} else {
TypeVariable<?> tv = (TypeVariable<?>) componentType;
Type[] bounds = tv.getBounds();
if (bounds != null && bounds.length == 1) {
if (bounds[0] instanceof Class) {
ct = (Class<?>) bounds[0];
} else {
throw new IllegalArgumentException("Unable to determine type for: " + tv);
}
} else {
throw new IllegalArgumentException("Unable to determine type for: " + tv);
}
}
ct = Array.newInstance(ct, 0).getClass();
addClass(ct);
} else if (cls instanceof WildcardType) {
for (Type t : ((WildcardType) cls).getUpperBounds()) {
addType(t);
}
for (Type t : ((WildcardType) cls).getLowerBounds()) {
addType(t);
}
} else if (cls instanceof TypeVariable) {
for (Type t : ((TypeVariable<?>) cls).getBounds()) {
addType(t);
}
}
}
/** Returns true if {@code a} and {@code b} are equal. */
public static boolean equals(Type a, Type b) {
if (a == b) {
// also handles (a == null && b == null)
return true;
} else if (a instanceof Class) {
// Class already specifies equals().
return a.equals(b);
} else if (a instanceof ParameterizedType) {
if (!(b instanceof ParameterizedType)) {
return false;
}
// TODO: save a .clone() call
ParameterizedType pa = (ParameterizedType) a;
ParameterizedType pb = (ParameterizedType) b;
return equal(pa.getOwnerType(), pb.getOwnerType())
&& pa.getRawType().equals(pb.getRawType())
&& Arrays.equals(pa.getActualTypeArguments(), pb.getActualTypeArguments());
} else if (a instanceof GenericArrayType) {
if (!(b instanceof GenericArrayType)) {
return false;
}
GenericArrayType ga = (GenericArrayType) a;
GenericArrayType gb = (GenericArrayType) b;
return equals(ga.getGenericComponentType(), gb.getGenericComponentType());
} else if (a instanceof WildcardType) {
if (!(b instanceof WildcardType)) {
return false;
}
WildcardType wa = (WildcardType) a;
WildcardType wb = (WildcardType) b;
return Arrays.equals(wa.getUpperBounds(), wb.getUpperBounds())
&& Arrays.equals(wa.getLowerBounds(), wb.getLowerBounds());
} else if (a instanceof TypeVariable) {
if (!(b instanceof TypeVariable)) {
return false;
}
TypeVariable<?> va = (TypeVariable<?>) a;
TypeVariable<?> vb = (TypeVariable<?>) b;
return va.getGenericDeclaration() == vb.getGenericDeclaration()
&& va.getName().equals(vb.getName());
} else {
// This isn't a type we support. Could be a generic array type,
// wildcard type, etc.
return false;
}
}
private static Type getDefaultType(
Type type, Map<TypeVariable<?>, Type> handledArguments, TypeVariable<?> currentArgument) {
if (type instanceof Class) {
return type;
} else if (type instanceof TypeVariable<?>) {
Type handledArgument = handledArguments.get(type);
if (handledArgument != null) {
return handledArgument;
}
if (type == currentArgument) {
// class Enum<E extends Enum<? extends E>> and class Enum<E extends Enum<E>>
return currentArgument;
}
return null;
} else if (type instanceof GenericArrayType) {
Type componentType = ((GenericArrayType) type).getGenericComponentType();
Type defaultComponentType = getDefaultType(componentType, handledArguments, currentArgument);
if (defaultComponentType != null) {
return new GenericArrayTypeImpl(defaultComponentType);
}
return null;
} else if (type instanceof WildcardType) {
Type[] varBounds = ((WildcardType) type).getUpperBounds();
Type varType = getDefaultType(varBounds, handledArguments, currentArgument);
if (varType != null) {
return varType;
}
return null;
} else {
ParameterizedType parameterizedType = (ParameterizedType) type;
Type[] vars =
parameterizedType
.getActualTypeArguments(); // F<T extends Serializable & List<? extends X>, X, Y
// extends T> -->> ? extends X
Type[] tranedArguments = new Type[vars.length];
for (int i = 0; i < vars.length; i++) {
Type var = vars[i];
Type defaultVar = getDefaultType(var, handledArguments, currentArgument);
if (defaultVar == null) {
return null;
} else if (defaultVar == currentArgument) {
// class Enum<E extends Enum<? extends E>> vs class Enum<E extends Enum<E>>
// 出现递归，则忽略所有参数? N extends Map<N, Object> ==>> Map
// TODO N extends Map<N, Object> ==>> Map<Map<Map<...>>, Object>
return parameterizedType.getRawType();
} else {
tranedArguments[i] = defaultVar;
}
}
return new ParameterizedTypeImpl(parameterizedType.getRawType(), tranedArguments);
}
}
/*
* Enabled force condition propagation
* Lifted jumps to return sites
*/
private static boolean typeEquals(ParameterizedType arrtype, ParameterizedType arrtype2, Map<String, Type> map) {
if (!arrtype.getRawType().equals(arrtype2.getRawType())) return false;
arrtype = arrtype.getActualTypeArguments();
arrtype2 = arrtype2.getActualTypeArguments();
int n2 = 0;
while (n2 < arrtype.length) {
if (!TypeToken.matches(arrtype[n2], arrtype2[n2], map)) {
return false;
}
++n2;
}
return true;
}
/**
* Checks if two parameterized types are exactly equal, under the variable replacement described
* in the typeVarMap.
*/
private static boolean typeEquals(
ParameterizedType from, ParameterizedType to, Map<String, Type> typeVarMap) {
if (from.getRawType().equals(to.getRawType())) {
Type[] fromArgs = from.getActualTypeArguments();
Type[] toArgs = to.getActualTypeArguments();
for (int i = 0; i < fromArgs.length; i++) {
if (!matches(fromArgs[i], toArgs[i], typeVarMap)) {
return false;
}
}
return true;
}
return false;
}
private static Class getClass(Type type) {
if (type instanceof Class) {
return (Class) type;
} else if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
if (parameterizedType.getRawType() instanceof Class) {
return (Class) parameterizedType.getRawType();
}
}
throw new IllegalArgumentException(
"Type parameter ["
+ type.toString()
+ "] not a class or "
+ "parameterized type whose raw type is a class");
}
public void testResolveToGenericArrayType() {
GenericArrayType arrayType =
(GenericArrayType) new Holder<List<int[][]>[]>() {}.getContentType();
ParameterizedType listType = (ParameterizedType) arrayType.getGenericComponentType();
assertEquals(List.class, listType.getRawType());
assertEquals(Types.newArrayType(int[].class), listType.getActualTypeArguments()[0]);
}
@Nullable
private static TypeWrapper wrap(Type type) {
if (type == null) {
return null;
} else if (type instanceof Class) {
return new ClassTypeWrapper((Class<?>) type);
} else if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
return new ParameterizedTypeWrapper(
toWrappers(parameterizedType.getActualTypeArguments()),
(ClassTypeWrapper) wrap(parameterizedType.getRawType()),
wrap(parameterizedType.getOwnerType()));
} else if (type instanceof WildcardType) {
WildcardType wildcardType = (WildcardType) type;
return new WildcardTypeWrapper(
toWrappers(wildcardType.getUpperBounds()),
toWrappers(wildcardType.getLowerBounds()),
type.hashCode());
} else if (type instanceof TypeVariable) {
TypeVariable<?> typeVariable = (TypeVariable<?>) type;
return new TypeVariableTypeWrapper(
typeVariable.getName(), toWrappers(typeVariable.getBounds()), type.hashCode());
} else if (type instanceof GenericArrayType) {
GenericArrayType genericArrayType = (GenericArrayType) type;
return new GenericArrayTypeWrapper(
wrap(genericArrayType.getGenericComponentType()), type.hashCode());
} else {
throw new IllegalArgumentException("cannot wrap type of type " + type.getClass());
}
}
public static Class<?> getRawType(Type type) {
if (type instanceof Class<?>) {
// type is a normal class.
return (Class<?>) type;
} else if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
// I'm not exactly sure why getRawType() returns Type instead of Class.
// Neal isn't either but suspects some pathological case related
// to nested classes exists.
Type rawType = parameterizedType.getRawType();
// checkArgument(rawType instanceof Class,
// "Expected a Class, but <%s> is of type %s", type, type.getClass().getName());
return (Class<?>) rawType;
} else if (type instanceof GenericArrayType) {
// TODO: Is this sufficient?
return Object[].class;
} else if (type instanceof TypeVariable) {
// we could use the variable's bounds, but that'll won't work if there are multiple.
// having a raw type that's more general than necessary is okay
return Object.class;
} else {
throw new IllegalArgumentException(
"Expected a Class, ParameterizedType, or "
+ "GenericArrayType, but <"
+ type
+ "> is of type "
+ type.getClass().getName());
}
}
private static GenericType getFieldType(
VariableMapping currentMapping, Class<?> startClass, String fieldname) {
Type type = null;
Field field = null; // e.g. BClass<String, Integer> bObject;
{
Class<?> ownerClass = startClass;
findfield:
while (true) {
Field[] fields = ownerClass.getDeclaredFields();
for (Field f : fields) {
if (f.getName().equals(fieldname)) {
field = f;
break findfield;
}
}
// field not found so far
// -> search superclass
Type superType = ownerClass.getGenericSuperclass();
if (superType instanceof ParameterizedType) {
ParameterizedType parameterizedSuperType = (ParameterizedType) superType;
currentMapping = new VariableMapping(currentMapping, parameterizedSuperType);
ownerClass = (Class<?>) parameterizedSuperType.getRawType();
} else if (superType instanceof Class<?>) {
ownerClass = (Class<?>) superType;
} else {
throw new IllegalStateException();
}
}
}
type = field.getGenericType(); // e.g. BClass<String, Integer>
return getGenericType(currentMapping, type);
}
private static VariableMapping resolveTypeVariableInParameterizedType(
TypeVariable<?> var, ParameterizedType inParameterizedType, VariableMapping currentMapping) {
assertThatTypeVariableDoesParameterizeAClass(var);
currentMapping = new VariableMapping(currentMapping, inParameterizedType);
Class<?> inClass = (Class<?>) inParameterizedType.getRawType();
return resolveTypeVariableInClass(var, inClass, currentMapping);
}
/**
* Returns the value of the given {@link TypeVariable} as a {@link GenericType}.
*
* @param variable must parameterize this type or one of it's super types
* @return the actual value of the given {@link TypeVariable} as a {@link GenericType}
* @throws IllegalArgumentException if the variable does not parameterize this type
* @throws UnsupportedOperationException if the type parameter resolution is not supported for
* this type
*/
public GenericType getTypeParameter(TypeVariable<? extends Class<?>> variable)
throws IllegalArgumentException, IllegalStateException {
assertThatTypeVariableDoesParameterizeAClass(variable);
GenericType result = null;
if (type instanceof Class<?>) {
Class<?> cls = (Class<?>) type;
// Class<?> parameterizedClass = (Class<?>)
// variable.getGenericDeclaration();
// // Break-Condition
// if (parameterizedClass.equals(cls)) {
// GenericType result = new GenericType(mapping, variable);
// return result;
// }
VariableMapping aMapping = resolveTypeVariableInClass(variable, cls, mapping);
if (aMapping != null) {
result = getGenericType(aMapping, variable);
}
} else if (type instanceof ParameterizedType) {
ParameterizedType pType = (ParameterizedType) type;
Class<?> rawType = (Class<?>) pType.getRawType();
VariableMapping aMapping = resolveTypeVariableInClass(variable, rawType, mapping);
if (aMapping != null) {
result = getGenericType(aMapping, variable);
}
} else {
throw new UnsupportedOperationException(
String.format("Type parameter resolution not supported for %s", type));
}
if (result == null) {
throw new IllegalArgumentException(
String.format("%s does not parameterize this type %s!", variable, type));
} else {
return result;
}
}
public static Set<Class<?>> getReferencedClasses(
Set<Type> referencedTypes, TypescriptServiceGeneratorConfiguration settings) {
Set<Class<?>> ret = Sets.newHashSet();
for (Type t : referencedTypes) {
if (settings.ignoredClasses().contains(t)) {
continue;
}
if (t instanceof Class && ((Class<?>) t).isEnum()) {
ret.add((Class<?>) t);
continue;
}
// dummy context used for below check
Context nullContext =
new Context(new SymbolTable(settings.getSettings()), settings.customTypeProcessor());
// Don't add any classes that the user has made an exception for
if (settings.customTypeProcessor().processType(t, nullContext) == null) {
if (t instanceof Class) {
ret.add((Class<?>) t);
} else if (t instanceof ParameterizedType) {
ParameterizedType parameterized = (ParameterizedType) t;
ret.addAll(getReferencedClasses(Sets.newHashSet(parameterized.getRawType()), settings));
ret.addAll(
getReferencedClasses(
Sets.newHashSet(Arrays.asList(parameterized.getActualTypeArguments()).iterator()),
settings));
}
}
}
return ret;
}
/** 获取一个Type类型实际对应的Class */
@SuppressWarnings("rawtypes")
public static Class<?> getTypeClass(Type type) {
Class<?> clazz = null;
if (type instanceof Class<?>) {
clazz = (Class<?>) type;
} else if (type instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) type;
clazz = (Class<?>) pt.getRawType();
} else if (type instanceof GenericArrayType) {
GenericArrayType gat = (GenericArrayType) type;
Class<?> typeClass = getTypeClass(gat.getGenericComponentType());
return Array.newInstance(typeClass, 0).getClass();
} else if (type instanceof TypeVariable) {
TypeVariable tv = (TypeVariable) type;
Type[] ts = tv.getBounds();
if (ts != null && ts.length > 0) return getTypeClass(ts[0]);
} else if (type instanceof WildcardType) {
WildcardType wt = (WildcardType) type;
Type[] t_low = wt.getLowerBounds(); // 取其下界
if (t_low.length > 0) return getTypeClass(t_low[0]);
Type[] t_up = wt.getUpperBounds(); // 没有下界?取其上界
return getTypeClass(t_up[0]); // 最起码有Object作为上界
}
return clazz;
}
/**
* Determines the component type. Lists is the first type, Map is the second type, etc.
*
* @param type The parametrized type.
* @param path The path to the type, used in exception message.
* @return The component type.
*/
public static Type componentType(Type type, String path) {
if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
Class<?> rawType = (Class<?>) parameterizedType.getRawType();
if (Map.class.isAssignableFrom(rawType)) {
return parameterizedType.getActualTypeArguments()[1];
} else if (Collection.class.isAssignableFrom(rawType)) {
return parameterizedType.getActualTypeArguments()[0];
} else {
throw new CollectionExpressionException("Unknown collection type [" + type + "]");
}
} else if (type instanceof GenericArrayType) {
return ((GenericArrayType) type).getGenericComponentType();
}
Class<?> rawType = (Class<?>) type;
if (Map.class == type || Collection.class == type) {
throw new CollectionExpressionException(
"The method or member ["
+ path
+ "] returns a simple "
+ "Map or Collection. Unable to determine the type of the Map or Collection. "
+ "Please make this method generic so that the correct type can be determined.");
} else if (rawType.isArray()) {
return rawType.getComponentType();
}
return rawType;
}
static Class<?> getTypeClass(Type type) {
if (type instanceof Class<?>) {
return (Class<?>) type;
}
if (type instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) type;
Class<?> c = (Class<?>) pt.getRawType();
if (ValuedEnum.class.isAssignableFrom(c)) {
Type[] types = pt.getActualTypeArguments();
if (types == null || types.length != 1) {
c = int.class;
} else {
c = getTypeClass(pt.getActualTypeArguments()[0]);
}
}
return c;
}
if (type instanceof GenericArrayType) {
if (Object.class.isAssignableFrom(
getTypeClass(((GenericArrayType) type).getGenericComponentType()))) {
return Object[].class;
}
}
throw new UnsupportedOperationException("Unknown type type : " + type.getClass().getName());
}
private void writeObject(
ContentValues values, Object object, String columnName, ParameterizedType fieldType)
throws IOException {
if (object == null) return;
final Type rawType = fieldType.getRawType();
if (!(rawType instanceof Class)) throw new UnsupportedOperationException();
final Class rawCls = (Class) rawType;
if (List.class.isAssignableFrom(rawCls)) {
values.put(
columnName,
LoganSquare.serialize((List) object, (Class) fieldType.getActualTypeArguments()[0]));
} else if (Map.class.isAssignableFrom(rawCls)) {
//noinspection unchecked
values.put(
columnName,
LoganSquare.serialize((Map) object, (Class) fieldType.getActualTypeArguments()[1]));
} else if (rawCls.isArray()) {
final Class componentType = rawCls.getComponentType();
values.put(
columnName,
LoganSquare.serialize((List) Arrays.asList((Object[]) object), componentType));
} else {
values.put(columnName, LoganSquare.serialize(object));
}
}
@SuppressWarnings("unchecked")
static Class<? extends Event<?>> getEventClass(Class<?> handlerClass) {
for (Class<?> i : handlerClass.getInterfaces()) {
if (EventHandler.class.equals(i)) {
for (Type t : handlerClass.getGenericInterfaces()) {
if (t instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) t;
if (EventHandler.class.equals(pt.getRawType())) {
return (Class<? extends Event<?>>) pt.getActualTypeArguments()[0];
}
}
}
} else if (EventHandler.class.isAssignableFrom(i)) {
return getEventClass((Class<? extends EventHandler<?>>) i);
}
}
if (EventHandler.class.isAssignableFrom(handlerClass.getSuperclass())) {
return getEventClass((Class<?>) handlerClass.getSuperclass());
}
return null;
}
/**
* Infer value type in one collection type
*
* @param genericType
* @return
*/
public static Type inferElementTypeIn(Type collectionType) {
if (collectionType instanceof Class) {
return Object.class;
} else if (collectionType instanceof ParameterizedType) {
ParameterizedType parameterizedCollectionType = (ParameterizedType) collectionType;
Type collectionValueType = parameterizedCollectionType.getActualTypeArguments()[0];
if (collectionValueType instanceof Class) {
return (Class) collectionValueType;
} else if (collectionValueType instanceof ParameterizedType) {
ParameterizedType type = (ParameterizedType) collectionValueType;
return type.getRawType();
} else if (collectionValueType instanceof WildcardType) {
throw new UnusableTypeException(
"we can't infer element type in widlcard type " + collectionType.toString());
} else if (collectionValueType instanceof TypeVariable) {
throw new UnusableTypeException(
"we can't infer element type in type variable " + collectionType.toString());
}
} else if (collectionType instanceof WildcardType) {
throw new UnusableTypeException(
"we can't infer element type in widlcard type " + collectionType.toString());
} else if (collectionType instanceof TypeVariable) {
throw new UnusableTypeException(
"we can't infer element type in type variable " + collectionType.toString());
}
throw new UnusableTypeException("we can't infer element type in " + collectionType.toString());
}
private String nameFor(ParameterizedType type) {
Class<?> raw = (Class<?>) type.getRawType();
if (Collection.class.isAssignableFrom(raw)) {
return nameFor(type.getActualTypeArguments()[0]) + "List";
}
return nameFor(raw);
}
/**
* Creates the type, it's private so you must use fromType.
*
* @param type
*/
private JavaType(Type type) {
// the type
this.type = type;
// parameterized?
parameterizedType =
ParameterizedType.class.isInstance(type) ? ParameterizedType.class.cast(type) : null;
// generic info
genericInfo = parameterizedType != null;
// get class
if (Class.class.isInstance(type)) {
clazz = Class.class.cast(type);
} else if (parameterizedType != null) {
clazz = Class.class.cast(parameterizedType.getRawType());
} else {
clazz = null;
}
// component type
if (clazz != null && clazz.getComponentType() != null) {
componentType = clazz.getComponentType();
}
// instantiable
instantiable = clazz != null;
// typeParameters
typeParameters = parameterizedType != null ? parameterizedType.getActualTypeArguments() : null;
// genericInfo
genericInfo = typeParameters != null;
}
private static int checkParameterizedType(
String subroutineName,
ParameterizedType expectedType,
ArgumentsList arguments,
List<LispObject> args,
int argsCounter,
int i) {
Type rawType = expectedType.getRawType();
Type expectedTypeArguments = expectedType.getActualTypeArguments()[0];
try {
if (((Class) rawType).isInstance(args.get(argsCounter))) {
Type actualTypeArguments =
((ParameterizedType) (Type) args.get(argsCounter).getClass())
.getActualTypeArguments()[0];
if (!expectedTypeArguments.equals(actualTypeArguments)) {
throw new WrongTypeArgumentException(
((Class) rawType).getSimpleName()
+ "<"
+ ((Class) expectedTypeArguments).getSimpleName()
+ ">",
args.get(argsCounter));
}
arguments.setValue(i, args.get(argsCounter));
return argsCounter + 1;
} else {
if (arguments.isOptional(i)) return -1;
throw new WrongTypeArgumentException(expectedType.toString(), args.get(argsCounter));
}
} catch (IndexOutOfBoundsException e) {
if (arguments.isOptional(i)) return -1;
throw new WrongNumberOfArgumentsException(subroutineName, i);
}
}
@SuppressWarnings("unchecked")
private static Class<?> getRawType(Type type) {
if (type instanceof Class<?>) {
// type is a normal class.
return (Class<?>) type;
} else if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
// I'm not exactly sure why getRawType() returns Type instead of Class.
// Neal isn't either but suspects some pathological case related
// to nested classes exists.
Type rawType = parameterizedType.getRawType();
if (rawType instanceof Class<?>) {
return (Class<?>) rawType;
}
throw buildUnexpectedTypeError(rawType, Class.class);
} else if (type instanceof GenericArrayType) {
GenericArrayType genericArrayType = (GenericArrayType) type;
// TODO(jleitch): This is not the most efficient way to handle generic
// arrays, but is there another way to extract the array class in a
// non-hacky way (i.e. using String value class names- "[L...")?
Object rawArrayType =
Array.newInstance(getRawType(genericArrayType.getGenericComponentType()), 0);
return rawArrayType.getClass();
} else {
throw buildUnexpectedTypeError(type, ParameterizedType.class, GenericArrayType.class);
}
}
/**
* Get the parameterized class arguments for a declaring class that declares a generic interface
* type.
*
* @param p the declaring class
* @return the parameterized class arguments, or null if the generic interface type is not a
* parameterized type.
*/
public static Class[] getParameterizedClassArguments(DeclaringClassInterfacePair p) {
if (p.genericInterface instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) p.genericInterface;
Type[] as = pt.getActualTypeArguments();
Class[] cas = new Class[as.length];
for (int i = 0; i < as.length; i++) {
Type a = as[i];
if (a instanceof Class) {
cas[i] = (Class) a;
} else if (a instanceof ParameterizedType) {
pt = (ParameterizedType) a;
cas[i] = (Class) pt.getRawType();
} else if (a instanceof TypeVariable) {
ClassTypePair ctp =
resolveTypeVariable(p.concreteClass, p.declaringClass, (TypeVariable) a);
cas[i] = (ctp != null) ? ctp.c : Object.class;
} else if (a instanceof GenericArrayType) {
cas[i] = getClassOfType(a);
}
}
return cas;
} else {
return null;
}
}
