Package org.springframework.cloud.stream.reflection

Class GenericsUtils

java.lang.Object

org.springframework.cloud.stream.reflection.GenericsUtils

public final class GenericsUtils
extends Object

Internal utilities for handling generics.

Author:

Marius Bogoevici, Gary Russell

Method Summary

Modifier and Type	Method	Description
static boolean	checkCompatiblePollableBinder(Binder binderInstance, Class<?> bindingTargetType)	Return the generic type of PollableSource to determine if it is appropriate for the binder.
static Class<?>	getParameterType(Class<?> evaluatedClass, Class<?> interfaceClass, int position)	For a specific class that implements or extends a parameterized type, return the parameter of that interface at a given position.

Methods inherited from class java.lang.Object

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

Method Details

getParameterType

public static Class<?> getParameterType(Class<?> evaluatedClass,
 Class<?> interfaceClass,
 int position)

For a specific class that implements or extends a parameterized type, return the parameter of that interface at a given position. For example, for this class:

 
 class MessageChannelBinder implements Binder<MessageChannel, ?, ?>
  

 
 getParameterType(MessageChannelBinder.class, Binder.class, 0);
  

will return Binder

Parameters:

evaluatedClass - the evaluated class

interfaceClass - the parametrized interface

position - the position

Returns:

the parameter type if any

Throws:

IllegalStateException - if the evaluated class does not implement the interface or

checkCompatiblePollableBinder

public static boolean checkCompatiblePollableBinder(Binder binderInstance,
 Class<?> bindingTargetType)

Return the generic type of PollableSource to determine if it is appropriate for the binder. e.g., with PollableMessageSource extends PollableSource<MessageHandler> and AbstractMessageChannelBinder implements PollableConsumerBinder<MessageHandler, C> We're checking that the the generic type (MessageHandler) matches.

Parameters:

binderInstance - the binder.

bindingTargetType - the binding target type.

Returns:

true if found, false otherwise.