private String nameFor(WildcardType wild) {
if ((wild.getLowerBounds().length != 0)) {
return nameFor(wild.getLowerBounds()[0]);
} else {
return nameFor(wild.getUpperBounds()[0]);
}
}
public boolean equals(Object o) {
if (o instanceof WildcardType) {
WildcardType wt = (WildcardType) o;
return Arrays.equals(upperBounds, wt.getUpperBounds())
&& Arrays.equals(lowerBounds, wt.getLowerBounds());
} else return false;
}
@Nullable
private static Class<?> getErasure(Type type) {
if (type instanceof Class) {
return (Class) type;
}
if (type instanceof ParameterizedType) {
return getErasure(((ParameterizedType) type).getRawType());
}
if (type instanceof TypeVariable) {
for (final Type bound : ((TypeVariable) type).getBounds()) {
final Class<?> aClass = getErasure(bound);
if (aClass != null) {
return aClass;
}
}
}
if (type instanceof WildcardType) {
final WildcardType wildcardType = (WildcardType) type;
for (final Type bound : wildcardType.getUpperBounds()) {
final Class<?> aClass = getErasure(bound);
if (aClass != null) {
return aClass;
}
}
}
return null;
}
@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());
}
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof WildcardType)) return false;
WildcardType other = (WildcardType) obj;
return Arrays.equals(lowerBounds, other.getLowerBounds())
&& Arrays.equals(upperBounds, other.getUpperBounds());
}
static String toString(WildcardType wt) {
final boolean isSuper = wt.getLowerBounds().length > 0;
return String.format(
"? %s %s",
isSuper ? "super" : "extends",
isSuper ? toString(wt.getLowerBounds()) : toString(wt.getLowerBounds()));
}
/** 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;
}
private Type getElementType(ParameterizedType type, int index) {
Type elementType = type.getActualTypeArguments()[index];
if (elementType instanceof WildcardType) {
WildcardType wildcardType = (WildcardType) elementType;
return wildcardType.getUpperBounds()[0];
}
return elementType;
}
@Override
public boolean equals(Object obj) {
if (obj instanceof WildcardType) {
WildcardType that = (WildcardType) obj;
return lowerBounds.equals(Arrays.asList(that.getLowerBounds()))
&& upperBounds.equals(Arrays.asList(that.getUpperBounds()));
}
return false;
}
public boolean equals(Object var1) {
if (!(var1 instanceof WildcardType)) {
return false;
} else {
WildcardType var2 = (WildcardType) var1;
return this.lowerBounds.equals(Arrays.asList(var2.getLowerBounds()))
&& this.upperBounds.equals(Arrays.asList(var2.getUpperBounds()));
}
}
/**
* @param type - something like List<? super T>, List<<? extends T>, List<? extends T &
* Comparable<? super T>>
* @param containingType - the shallowest type in the hierarchy where type is defined.
* @return the passed type if nothing to resolve or a copy of the type with the upper and lower
* bounds resolved.
*/
private static WildcardType resolve(WildcardType type, Type containingType) {
// Use a copy because we're going to modify them.
final Type[] upper = type.getUpperBounds().clone();
final Type[] lower = type.getLowerBounds().clone();
boolean modified = resolve(upper, containingType);
modified = modified || resolve(lower, containingType);
return modified ? create(upper, lower) : type;
}
/**
* Converts a Type into a jdiff compatible String. The returned types from this function should
* match the same Strings that jdiff is providing to us.
*
* @param type the type to convert.
* @return the jdiff formatted string.
*/
private static String typeToString(Type type) {
if (type instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) type;
StringBuffer sb = new StringBuffer();
sb.append(typeToString(pt.getRawType()));
sb.append("<");
int elementNum = 0;
Type[] types = pt.getActualTypeArguments();
for (Type t : types) {
sb.append(typeToString(t));
if (++elementNum < types.length) {
sb.append(", ");
}
}
sb.append(">");
return sb.toString();
} else if (type instanceof TypeVariable) {
return ((TypeVariable<?>) type).getName();
} else if (type instanceof Class) {
return ((Class<?>) type).getCanonicalName();
} else if (type instanceof GenericArrayType) {
String typeName = typeToString(((GenericArrayType) type).getGenericComponentType());
return typeName + "[]";
} else if (type instanceof WildcardType) {
WildcardType wt = (WildcardType) type;
Type[] lowerBounds = wt.getLowerBounds();
if (lowerBounds.length == 0) {
String name = "? extends " + concatWildcardTypes(wt.getUpperBounds());
// Special case for ?
if (name.equals("? extends java.lang.Object")) {
return "?";
} else {
return name;
}
} else {
String name =
concatWildcardTypes(wt.getUpperBounds())
+ " super "
+ concatWildcardTypes(wt.getLowerBounds());
// Another special case for ?
name = name.replace("java.lang.Object", "?");
return name;
}
} else {
throw new RuntimeException("Got an unknown java.lang.Type");
}
}
private static boolean isWildcardTypeAssignable(WildcardType supertype, Type type) {
for (Type upperBound : supertype.getUpperBounds()) {
if (!isAssignable(upperBound, type)) {
return false;
}
}
for (Type lowerBound : supertype.getLowerBounds()) {
if (!isAssignable(type, lowerBound)) {
return false;
}
}
return true;
}
/** Returns the array type of {@code componentType}. */
static Type newArrayType(Type componentType) {
if (componentType instanceof WildcardType) {
WildcardType wildcard = (WildcardType) componentType;
Type[] lowerBounds = wildcard.getLowerBounds();
checkArgument(lowerBounds.length <= 1, "Wildcard cannot have more than one lower bounds.");
if (lowerBounds.length == 1) {
return supertypeOf(newArrayType(lowerBounds[0]));
} else {
Type[] upperBounds = wildcard.getUpperBounds();
checkArgument(upperBounds.length == 1, "Wildcard should have only one upper bound.");
return subtypeOf(newArrayType(upperBounds[0]));
}
}
return JavaVersion.CURRENT.newArrayType(componentType);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
return wildcard.equals(((TypeVarBoundedType) o).typeVariable);
}
static Type newArrayType(Type var0) {
if (var0 instanceof WildcardType) {
WildcardType var1 = (WildcardType) var0;
Type[] var2 = var1.getLowerBounds();
Preconditions.checkArgument(
var2.length <= 1, "Wildcard cannot have more than one lower bounds.");
if (var2.length == 1) {
return supertypeOf(newArrayType(var2[0]));
} else {
Type[] var3 = var1.getUpperBounds();
Preconditions.checkArgument(var3.length == 1, "Wildcard should have only one upper bound.");
return subtypeOf(newArrayType(var3[0]));
}
} else {
return Types.JavaVersion.CURRENT.newArrayType(var0);
}
}
public static Type[] getImplicitLowerBounds(WildcardType paramWildcardType) {
Type[] arrayOfType = paramWildcardType.getLowerBounds();
if (arrayOfType.length == 0) {
arrayOfType = new Type[1];
arrayOfType[0] = null;
}
return arrayOfType;
}
/**
* Resolves all type variables in {@code type} and all downstream types and returns a
* corresponding type with type variables resolved.
*/
public Type resolveType(Type type) {
checkNotNull(type);
if (type instanceof TypeVariable) {
return typeTable.resolve((TypeVariable<?>) type);
} else if (type instanceof ParameterizedType) {
return resolveParameterizedType((ParameterizedType) type);
} else if (type instanceof GenericArrayType) {
return resolveGenericArrayType((GenericArrayType) type);
} else if (type instanceof WildcardType) {
WildcardType wildcardType = (WildcardType) type;
return new Types.WildcardTypeImpl(
resolveTypes(wildcardType.getLowerBounds()), resolveTypes(wildcardType.getUpperBounds()));
} else {
// if Class<?>, no resolution needed, we are done.
return type;
}
}
/**
* Returns raw class for given <code>type</code> when implementation class is known and it makes
* difference.
*
* @see #resolveVariable(java.lang.reflect.TypeVariable, Class)
*/
public static Class<?> getRawType(Type type, Class implClass) {
if (type instanceof Class) {
return (Class) type;
}
if (type instanceof ParameterizedType) {
ParameterizedType pType = (ParameterizedType) type;
return getRawType(pType.getRawType(), implClass);
}
if (type instanceof WildcardType) {
WildcardType wType = (WildcardType) type;
Type[] lowerTypes = wType.getLowerBounds();
if (lowerTypes.length > 0) {
return getRawType(lowerTypes[0], implClass);
}
Type[] upperTypes = wType.getUpperBounds();
if (upperTypes.length != 0) {
return getRawType(upperTypes[0], implClass);
}
return Object.class;
}
if (type instanceof GenericArrayType) {
Type genericComponentType = ((GenericArrayType) type).getGenericComponentType();
Class<?> rawType = getRawType(genericComponentType, implClass);
// this is sort of stupid, but there seems no other way (consider don't creating new instances
// each time)...
return Array.newInstance(rawType, 0).getClass();
}
if (type instanceof TypeVariable) {
TypeVariable<?> varType = (TypeVariable<?>) type;
if (implClass != null) {
Type resolvedType = resolveVariable(varType, implClass);
if (resolvedType != null) {
return getRawType(resolvedType, null);
}
}
Type[] boundsTypes = varType.getBounds();
if (boundsTypes.length == 0) {
return Object.class;
}
return getRawType(boundsTypes[0], implClass);
}
return null;
}
private Class<?> extractInjectionClass(ParameterizedType parameterizedType) {
Type type = parameterizedType.getActualTypeArguments()[0];
if (type instanceof Class) {
return (Class<?>) type;
} else if (type instanceof ParameterizedType) {
return (Class<?>) ((ParameterizedType) type).getRawType();
} else if (type instanceof WildcardType) {
// To handle for instance Class<? extends Habba>, which will then return habba
WildcardType wcType = (WildcardType) type;
return (Class) wcType.getUpperBounds()[0];
} else if (type instanceof TypeVariable) {
TypeVariable tv = (TypeVariable) type;
return (Class) tv.getBounds()[0];
}
throw new IllegalArgumentException(
"Could not extract injectionClass of Type " + parameterizedType);
}
/**
* Creates {@link TypeInformation} for the given {@link Type}.
*
* @param fieldType the field type
* @return the type information
*/
@SuppressWarnings({"rawtypes", "unchecked"})
protected TypeInformation<?> createInfo(Type fieldType) {
if (fieldType.equals(this.type)) {
return this;
}
if (fieldType instanceof Class) {
return new ClassTypeInformation((Class<?>) fieldType);
}
Map<TypeVariable, Type> variableMap =
GenericTypeResolver.getTypeVariableMap(resolveType(fieldType));
if (fieldType instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) fieldType;
return new ParameterizedTypeInformation(parameterizedType, this);
}
if (fieldType instanceof TypeVariable) {
TypeVariable<?> variable = (TypeVariable<?>) fieldType;
return new TypeVariableTypeInformation(variable, type, this, variableMap);
}
if (fieldType instanceof GenericArrayType) {
return new GenericArrayTypeInformation((GenericArrayType) fieldType, this);
}
if (fieldType instanceof WildcardType) {
WildcardType wildcardType = (WildcardType) fieldType;
Type[] bounds = wildcardType.getLowerBounds();
if (bounds.length > 0) {
return createInfo(bounds[0]);
}
bounds = wildcardType.getUpperBounds();
if (bounds.length > 0) {
return createInfo(bounds[0]);
}
}
throw new IllegalArgumentException();
}
private static boolean isClassAssignableToWildcardType(Class<?> supertype, WildcardType type) {
for (Type upperBound : type.getUpperBounds()) {
if (!isAssignable(supertype, upperBound)) {
return false;
}
}
return true;
}
private ClassNode configureWildcardType(WildcardType wildcardType) {
ClassNode base = ClassHelper.makeWithoutCaching("?");
base.setRedirect(ClassHelper.OBJECT_TYPE);
// TODO: more than one lower bound for wildcards?
ClassNode[] lowers = configureTypes(wildcardType.getLowerBounds());
ClassNode lower = null;
// TODO: is it safe to remove this? What was the original intention?
if (lower != null) lower = lowers[0];
ClassNode[] upper = configureTypes(wildcardType.getUpperBounds());
GenericsType t = new GenericsType(base, upper, lower);
t.setWildcard(true);
ClassNode ref = ClassHelper.makeWithoutCaching(Object.class, false);
ref.setGenericsTypes(new GenericsType[] {t});
return ref;
}
public static Class<?> getRawClass(final Type type) {
if (Class.class.isInstance(type)) {
return Class.class.cast(type);
}
if (ParameterizedType.class.isInstance(type)) {
final ParameterizedType parameterizedType = ParameterizedType.class.cast(type);
return getRawClass(parameterizedType.getRawType());
}
if (WildcardType.class.isInstance(type)) {
final WildcardType wildcardType = WildcardType.class.cast(type);
final Type[] types = wildcardType.getUpperBounds();
return getRawClass(types[0]);
}
if (GenericArrayType.class.isInstance(type)) {
final GenericArrayType genericArrayType = GenericArrayType.class.cast(type);
final Class<?> rawClass = getRawClass(genericArrayType.getGenericComponentType());
return Array.newInstance(rawClass, 0).getClass();
}
return null;
}
public static Class<?> getActualType(Type genericType, final int pos) {
if (genericType == null) return null;
if (!ParameterizedType.class.isAssignableFrom(genericType.getClass())) {
if (genericType instanceof TypeVariable)
genericType = getType(((TypeVariable<?>) genericType).getBounds(), pos);
else if (genericType instanceof WildcardType) {
final WildcardType wildcardType = (WildcardType) genericType;
Type[] bounds = wildcardType.getLowerBounds();
if (bounds.length == 0) bounds = wildcardType.getUpperBounds();
genericType = getType(bounds, pos);
}
final Class<?> cls = (Class<?>) genericType;
return cls.isArray() ? cls.getComponentType() : cls;
}
final ParameterizedType paramType = (ParameterizedType) genericType;
final Type t = getType(paramType.getActualTypeArguments(), pos);
return t instanceof Class ? (Class<?>) t : getActualType(t, pos);
}
protected JavaType _fromWildcard(WildcardType type, TypeBindings context) {
/* Similar to challenges with TypeVariable, we may have
* multiple upper bounds. But it is also possible that if
* upper bound defaults to Object, we might want to consider
* lower bounds instead.
*
* For now, we won't try anything more advanced; above is
* just for future reference.
*/
return _fromType(type.getUpperBounds()[0], context);
}
private static void testReturnTypeIdentityref(
final Class<?> clazz, final String methodName, final String returnTypeStr) throws Exception {
Method method;
java.lang.reflect.Type returnType;
try {
method = clazz.getMethod(methodName);
assertEquals(java.lang.Class.class, method.getReturnType());
returnType = method.getGenericReturnType();
assertTrue(returnType instanceof ParameterizedType);
final ParameterizedType pt = (ParameterizedType) returnType;
final java.lang.reflect.Type[] parameters = pt.getActualTypeArguments();
assertEquals(1, parameters.length);
final java.lang.reflect.Type parameter = parameters[0];
assertTrue(parameter instanceof WildcardType);
final WildcardType wildcardType = (WildcardType) parameter;
assertEquals("? extends " + returnTypeStr, wildcardType.toString());
} catch (final NoSuchMethodException e) {
throw new AssertionError("Method '" + methodName + "' not found");
}
}
/**
* Returns a type that is functionally equal but not necessarily equal according to {@link
* Object#equals(Object) Object.equals()}. The returned type is {@link Serializable}.
*/
public static Type canonicalize(Type type) {
if (type instanceof Class) {
Class<?> c = (Class<?>) type;
return c.isArray() ? new GenericArrayTypeImpl(canonicalize(c.getComponentType())) : c;
} else if (type instanceof ParameterizedType) {
ParameterizedType p = (ParameterizedType) type;
return new ParameterizedTypeImpl(
p.getOwnerType(), p.getRawType(), p.getActualTypeArguments());
} else if (type instanceof GenericArrayType) {
GenericArrayType g = (GenericArrayType) type;
return new GenericArrayTypeImpl(g.getGenericComponentType());
} else if (type instanceof WildcardType) {
WildcardType w = (WildcardType) type;
return new WildcardTypeImpl(w.getUpperBounds(), w.getLowerBounds());
} else {
// type is either serializable as-is or unsupported
return type;
}
}
private static void testReturnTypeInstanceIdentitifer(
final ClassLoader loader, final Class<?> clazz, final String methodName) throws Exception {
Method method;
Class<?> rawReturnType;
java.lang.reflect.Type returnType;
try {
method = clazz.getMethod(methodName);
rawReturnType =
Class.forName("org.opendaylight.yangtools.yang.binding.InstanceIdentifier", true, loader);
assertEquals(rawReturnType, method.getReturnType());
returnType = method.getGenericReturnType();
assertTrue(returnType instanceof ParameterizedType);
final ParameterizedType pt = (ParameterizedType) returnType;
final java.lang.reflect.Type[] parameters = pt.getActualTypeArguments();
assertEquals(1, parameters.length);
final java.lang.reflect.Type parameter = parameters[0];
assertTrue(parameter instanceof WildcardType);
final WildcardType wildcardType = (WildcardType) parameter;
assertEquals("?", wildcardType.toString());
} catch (final NoSuchMethodException e) {
throw new AssertionError("Method '" + methodName + "' not found");
}
}
/** 得到实际Type类型对应的Class */
public static Class<?> asClass(Type actualType) {
if (actualType instanceof Class) return (Class<?>) actualType;
if (actualType instanceof ParameterizedType) {
final Type rawType = ((ParameterizedType) actualType).getRawType();
// The sun implementation returns getRawType as Class<?>, but there is room in the interface
// for it to be
// some other Type. We'll assume it's a Class.
// TODO: consider logging or throwing our own exception for that day when "something else"
// causes some confusion
return (Class) rawType;
}
if (actualType instanceof GenericArrayType) {
final Type type = ((GenericArrayType) actualType).getGenericComponentType();
return Array.newInstance(asClass(type), 0).getClass();
}
if (actualType instanceof TypeVariable) {
// Support for List<T extends Number>
// There is always at least one bound. If no bound is specified in the source then it will be
// Object.class
return asClass(((TypeVariable) actualType).getBounds()[0]);
}
if (actualType instanceof WildcardType) {
final WildcardType wildcardType = (WildcardType) actualType;
final Type[] bounds = wildcardType.getLowerBounds();
if (bounds != null && bounds.length > 0) {
return asClass(bounds[0]);
}
// If there is no lower bounds then the only thing that makes sense is Object.
return Object.class;
}
throw new RuntimeException(String.format("Unable to convert %s to Class.", actualType));
}
