Examples of java.lang.reflect.ParameterizedType

java.lang.reflect.ParameterizedType
ParameterizedType represents a parameterized type such as Collection<String>.
A parameterized type is created the first time it is needed by a reflective method, as specified in this package. When a parameterized type p is created, the generic type declaration that p instantiates is resolved, and all type arguments of p are created recursively. See {@link java.lang.reflect.TypeVariable TypeVariable} for details on the creation process for typevariables. Repeated creation of a parameterized type has no effect.
Instances of classes that implement this interface must implement an equals() method that equates any two instances that share the same generic type declaration and have equal type parameters. @since 1.5

  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) {

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   * @param index The index of the possible parameterized type
   * @return The concrete class (minimum/base) for the generic type, or null if it could not be determined or was not declared
   */
  public static Class<?> getConcreteGeneric (Type type, int index) {
    if (type instanceof ParameterizedType) {
      ParameterizedType pt = (ParameterizedType) type;
      if (pt.getActualTypeArguments().length <= index) return null;
      return pt.getActualTypeArguments()[index] instanceof ParameterizedType ?
        getConcreteGeneric(pt.getRawType(), 0) : getConcreteGeneric(pt.getActualTypeArguments()[index], 0);
    } else if (type instanceof WildcardType) {
      WildcardType wt = (WildcardType) type;
      return wt.getUpperBounds().length <= index ? null : getConcreteGeneric(wt.getUpperBounds()[index], 0);
    } else if (type instanceof TypeVariable) {
      TypeVariable tt = (TypeVariable) type;

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        re = new HashMap();
      else
        re = (Map) me.born();
      if (type instanceof ParameterizedType) {
        // 看来有泛型信息哦
        ParameterizedType pt = (ParameterizedType) type;
        Type[] ts = pt.getActualTypeArguments();
        Type tt = null;
        if (ts != null && ts.length > 1)
          tt = Lang.getTypeClass(ts[1]);// TODO 只能做到一层的泛型
        for (Entry<String, Object> entry : map.entrySet()) {
          re.put(entry.getKey(), convert(tt, entry.getValue()));

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  @SuppressWarnings({"unchecked", "rawtypes"})
  Object list2Object(Type type, List<Object> list) {
    Class<?> clazz = Lang.getTypeClass(type);
    Type tt = null;
    if (type instanceof ParameterizedType) {
      ParameterizedType pt = (ParameterizedType) type;
      Type[] ts = pt.getActualTypeArguments();
      if (ts != null && ts.length > 0)
        tt = Lang.getTypeClass(ts[0]);// TODO 只能做到一层的泛型
    }
    if (clazz.isArray()) {// 看来是数组
      List re = new ArrayList(list.size());

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        return getWorld().resolve(ut);
      } else {
        return getWorld().resolve(name);
      }
    } else if (aType instanceof ParameterizedType) {
      ParameterizedType pt = (ParameterizedType) aType;
      ResolvedType baseType = fromType(pt.getRawType());
      Type[] args = pt.getActualTypeArguments();
      ResolvedType[] resolvedArgs = fromTypes(args);
/*      StringBuilder sb = new StringBuilder();
      for (int i = 0; i < resolvedArgs.length; i++) {
        sb.append(resolvedArgs[i]).append(" ");
      }

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    Class cl = service.getClass();
    Type[] interfaces = cl.getGenericInterfaces();


    for (int i = 0; i < interfaces.length; i++) {
      if (interfaces[i] instanceof ParameterizedType) {
        ParameterizedType pType = (ParameterizedType) interfaces[i];


        if (Provider.class.equals(pType.getRawType())) {
          Type[] args = pType.getActualTypeArguments();


          if (args.length == 1) {
            if (Source.class.equals(args[0]))
              return new SourceProviderEncoding(service);
            else if (SOAPMessage.class.equals(args[0]))

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        return new SkeletonProperty(skel);
      else
        return null;
    }
    else if (type instanceof ParameterizedType) {
      ParameterizedType ptype = (ParameterizedType) type;
      Type rawType = ptype.getRawType();


      if (rawType instanceof Class) {
        Class rawClass = (Class) rawType;


        if (Map.class.isAssignableFrom(rawClass)) {
          Type[] args = ptype.getActualTypeArguments();


          if (args.length != 2)
            throw new JAXBException(L.l("unexpected number of generic arguments for Map<>: {0}", args.length));


          Property keyProperty = createProperty(args[0], anyType);
          Property valueProperty = createProperty(args[1], anyType);


          return new MapProperty(rawClass, keyProperty, valueProperty);
        }


        if (Collection.class.isAssignableFrom(rawClass)) {
          Type[] args = ptype.getActualTypeArguments();


          if (args.length != 1)
            throw new JAXBException(L.l("unexpected number of generic arguments for List<>: {0}", args.length));


          Property componentProperty = createProperty(args[0], anyType);

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        ClassSkeleton skeleton = null;
        QName root = null;


        if (cl.equals(JAXBElement.class)) {
          ParameterizedType type = 
            (ParameterizedType) method.getGenericReturnType();
          cl = (Class) type.getActualTypeArguments()[0];


          skeleton = new JAXBElementSkeleton(this, cl, method, objectFactory);
          _jaxbElementSkeletons.put(cl, (JAXBElementSkeleton) skeleton);
        }
        else {

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   **/
  public static Type getActualParameterType(Type type)
    throws JAXBException
  {
    if (type instanceof ParameterizedType) {
      ParameterizedType ptype = (ParameterizedType) type;


      if (ptype.getRawType().equals(Holder.class)) {
        Type[] arguments = ptype.getActualTypeArguments();


        if (arguments.length != 1)
          throw new JAXBException("Holder has incorrect number of arguments");


        return arguments[0];

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      if (! cl.isInterface())
        jaxbClasses.add((Class) type);
    }
    else if (type instanceof ParameterizedType) {
      ParameterizedType pType = (ParameterizedType) type;


      introspectType(pType.getRawType(), jaxbClasses);
      introspectType(pType.getOwnerType(), jaxbClasses);


      Type[] arguments = pType.getActualTypeArguments();


      for (Type argument : arguments)
        introspectType(argument, jaxbClasses);
    }
    else if (type instanceof GenericArrayType) {

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