Package org.eclipse.yasson.internal

Class VariableTypeInheritanceSearch

  • public class VariableTypeInheritanceSearch
extends java.lang.Object
    Search for type variable in inheritance hierarchy and resolve if possible.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.reflect.Type searchParametrizedType​(java.lang.reflect.Type typeToSearch, java.lang.reflect.TypeVariable<?> typeVar)
      Searches the hierarchy of classes to resolve a type variable.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • VariableTypeInheritanceSearch

        public VariableTypeInheritanceSearch()

    • Method Detail

      • searchParametrizedType

        public java.lang.reflect.Type searchParametrizedType​(java.lang.reflect.Type typeToSearch,
                                                     java.lang.reflect.TypeVariable<?> typeVar)
        Searches the hierarchy of classes to resolve a type variable. If typevar resolved value is another typevar redirection (propagated from wrapping class), this typevar is returned. 
        
 Example 1: typevar is resolved


 class GenericClass <T> {
     private T genericField;
 }
 class ConcreteClass extends GenericClass<MyPojo> {
     //...
 }

 In above case when ConcreteClass type is passed as runtime type and <T> as type variable, T is resolved to MyPojo.
 
         Example 2: typevar is resolved to another propagated typevar


 class WrapperGenericClass<X> {
     private GenericClass<X> propagatedGenericField
 }

 class AnotherClass extends WrapperGenericClass<MyPojo> {
 }


 In second case when GenericClass ParameterizedType is passed as runtime type and <T> as type variable,
 T is resolved to propagated <X> by WrapperGenericClass.

 Resolution on <X> must be performed thereafter with AnotherClass runtime type.
        Parameters:
        typeToSearch - runtime type to search for typevar in, not null
        typeVar - type variable to resolve, not null
        Returns:
        resolved runtime type, or type variable