/**
* Parse type variables for generics
*
* @param variables
* @return
*/
protected static TypeVar[] ParseTypeVariables(TypeVariable[] variables, ParamTag[] tags) {
TypeVar[] vars = null;
if (variables != null && variables.length > 0) {
ArrayList<TypeVar> varsList = new ArrayList<TypeVar>();
for (TypeVariable variable : variables) {
TypeVar var = new TypeVar();
var.name = variable.typeName();
Type[] bounds = variable.bounds();
if (bounds != null && bounds.length > 0) {
ArrayList<String> list = new ArrayList<String>();
for (Type bound : bounds) {
list.add(bound.qualifiedTypeName());
}
var.bounds = list.toArray(new String[] {});
}
for (ParamTag tag : tags)
if (tag.parameterName().equals(var.name)) var.comment = tag.parameterComment();
varsList.add(var);
}
vars = varsList.toArray(new TypeVar[] {});
}
return vars;
}
private DeclaredType getDeclaredTypeForTypeVariable(TypeVariable typeVariable) {
Name name = typeVariable.asElement().getSimpleName();
if (!_typeArguments.containsKey(name)) {
throw new UnsupportedOperationException(
String.format(
"Unknown parameterized type: %s. Available types in this context: %s",
typeVariable.toString(), _typeArguments));
} else {
return _typeArguments.get(name);
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
return typeVariable.equals(((TypeVarBoundedType) o).typeVariable);
}
/**
* @param typeParameter The TypeVariable parameter
* @return A {@link BoundedType} for easy bound information, if first bound is a TypeVariable then
* retrieve BoundedType of this TypeVariable
*/
private BoundedType boundsOf(TypeVariable typeParameter) {
if (typeParameter.getBounds()[0] instanceof TypeVariable) {
return boundsOf((TypeVariable) typeParameter.getBounds()[0]);
}
return new TypeVarBoundedType(typeParameter);
}
@Override
public int hashCode() {
return typeVariable.hashCode();
}
/**
* On a Type Variable (typeVar extends C_0 & I_1 & I_2 & etc), will return an array containing
* I_1 and I_2.
*
* @return other bounds for this type, these bounds can only be only interfaces as the JLS says,
* empty array if no other bound declared.
*/
public Type[] interfaceBounds() {
Type[] interfaceBounds = new Type[typeVariable.getBounds().length - 1];
System.arraycopy(
typeVariable.getBounds(), 1, interfaceBounds, 0, typeVariable.getBounds().length - 1);
return interfaceBounds;
}
/**
* @return either a class or an interface (parameterized or not), if no bounds declared Object
* is returned.
*/
public Type firstBound() {
return typeVariable.getBounds()[0]; //
}
private void readTypeVariables() {
for (Type type : typeVariable.getBounds()) {
registerTypeVariablesOn(type);
}
registerTypeVariablesOn(getActualTypeArgumentFor(typeVariable));
}
protected void _resolveBindings(Type t) {
if (t == null) return;
Class<?> raw;
if (t instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) t;
Type[] args = pt.getActualTypeArguments();
if (args != null && args.length > 0) {
Class<?> rawType = (Class<?>) pt.getRawType();
TypeVariable<?>[] vars = rawType.getTypeParameters();
if (vars.length != args.length) {
throw new IllegalArgumentException(
"Strange parametrized type (in class "
+ rawType.getName()
+ "): number of type arguments != number of type parameters ("
+ args.length
+ " vs "
+ vars.length
+ ")");
}
for (int i = 0, len = args.length; i < len; ++i) {
TypeVariable<?> var = vars[i];
String name = var.getName();
if (_bindings == null) {
_bindings = new LinkedHashMap<String, JavaType>();
} else {
/* 24-Mar-2010, tatu: Better ensure that we do not overwrite something
* collected earlier (since we descend towards super-classes):
*/
if (_bindings.containsKey(name)) continue;
}
// first: add a placeholder to prevent infinite loops
_addPlaceholder(name);
// then resolve type
_bindings.put(name, _typeFactory._constructType(args[i], this));
}
}
raw = (Class<?>) pt.getRawType();
} else if (t instanceof Class<?>) {
raw = (Class<?>) t;
/* [JACKSON-677]: If this is an inner class then the generics are defined on the
* enclosing class so we have to check there as well. We don't
* need to call getEnclosingClass since anonymous classes declare
* generics
*/
_resolveBindings(raw.getDeclaringClass());
/* 24-Mar-2010, tatu: Can not have true generics definitions, but can
* have lower bounds ("<T extends BeanBase>") in declaration itself
*/
TypeVariable<?>[] vars = raw.getTypeParameters();
if (vars != null && vars.length > 0) {
JavaType[] typeParams = null;
if (_contextType != null && raw.isAssignableFrom(_contextType.getRawClass())) {
typeParams = _typeFactory.findTypeParameters(_contextType, raw);
}
for (int i = 0; i < vars.length; i++) {
TypeVariable<?> var = vars[i];
String name = var.getName();
Type varType = var.getBounds()[0];
if (varType != null) {
if (_bindings == null) {
_bindings = new LinkedHashMap<String, JavaType>();
} else { // and no overwriting...
if (_bindings.containsKey(name)) continue;
}
_addPlaceholder(name); // to prevent infinite loops
if (typeParams != null) {
_bindings.put(name, typeParams[i]);
} else {
_bindings.put(name, _typeFactory._constructType(varType, this));
}
}
}
}
} else { // probably can't be any of these... so let's skip for now
// if (type instanceof GenericArrayType) {
// if (type instanceof TypeVariable<?>) {
// if (type instanceof WildcardType) {
return;
}
// but even if it's not a parameterized type, its super types may be:
_resolveBindings(raw.getGenericSuperclass());
for (Type intType : raw.getGenericInterfaces()) {
_resolveBindings(intType);
}
}