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 and 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 Detail

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 and AbstractMessageChannelBinder implements PollableConsumerBinder 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.