Package org.jvnet.hk2.config.tiger

Class Types

java.lang.Object
org.jvnet.hk2.config.tiger.Types
public class Types extends Object
Type arithmetic functions.
Author:
Kohsuke Kawaguchi

  • Constructor Details

    • Types

      public Types()

  • Method Details

    • getBaseClass

      public static Type getBaseClass(Type type, Class baseType)
      Gets the parameterization of the given base type.

      For example, given the following 

       
 interface Foo<T> extends List&lt;List<T>> {}
 interface Bar extends Foo<String> {}
      This method works like this: 
       
 getBaseClass( Bar, List ) = List&lt;List<String>
 getBaseClass( Bar, Foo  ) = Foo<String>
 getBaseClass( Foo&lt;? extends Number>, Collection ) = Collection&lt;List&lt;? extends Number>>
 getBaseClass( ArrayList&lt;? extends BigInteger>, List ) = List&lt;? extends BigInteger>
      Parameters:
      type - The type that derives from baseType
      baseType - The class whose parameterization we are interested in.
      Returns:
      The use of baseType in type. or null if the type is not assignable to the base type.

    • getTypeName

      public static String getTypeName(Type type)
      Gets the display name of the type object
      Returns:
      a human-readable name that the type represents.

    • isSubClassOf

      public static boolean isSubClassOf(Type sub, Type sup)
      Checks if sub is a sub-type of sup.

    • erasure

      public static <T> Class<T> erasure(Type t)
      Returns the Class representation of the given type. This corresponds to the notion of the erasure in JSR-14.

      It made me realize how difficult it is to define the common navigation layer for two different underlying reflection library. The other way is to throw away the entire parameterization and go to the wrapper approach.

    • createParameterizedType

      public static ParameterizedType createParameterizedType(Class rawType, Type... arguments)
      Returns the Type object that represents clazz&lt;T1,T2,T3>.

    • isArray

      public static boolean isArray(Type t)
      Checks if the type is an array type.

    • isArrayButNotByteArray

      public static boolean isArrayButNotByteArray(Type t)
      Checks if the type is an array type but not byte[].

    • getComponentType

      public static Type getComponentType(Type t)
      Gets the component type of the array.
      Parameters:
      t - must be an array.

    • getTypeArgument

      public static Type getTypeArgument(Type type, int i)
      Gets the i-th type argument from a parameterized type.

      Unlike getTypeArgument(Type, int, Type), this method throws IllegalArgumentException if the given type is not parameterized.

    • getTypeArgument

      public static Type getTypeArgument(Type type, int i, Type defaultValue)
      Gets the i-th type argument from a parameterized type.

      For example, getTypeArgument([Map<Integer,String>],0)=Integer If the given type is not a parameterized type, returns the specified default value.

      This is convenient for handling raw types and parameterized types uniformly.

      Throws:
      IndexOutOfBoundsException - If i is out of range.

    • isPrimitive

      public static boolean isPrimitive(Type type)
      Checks if the given type is a primitive type.

    • isOverriding

      public static boolean isOverriding(Method method, Class base)