Example usage for org.springframework.batch.support MethodInvokerUtils getMethodInvokerByAnnotation

Introduction

In this page you can find the example usage for org.springframework.batch.support MethodInvokerUtils getMethodInvokerByAnnotation.

Prototype

public static MethodInvoker getMethodInvokerByAnnotation(final Class<? extends Annotation> annotationType,
        final Object target) 

Source Link

Document

Create MethodInvoker for the method with the provided annotation on the provided object.

Usage

From source file:org.springframework.batch.core.listener.AbstractListenerFactoryBean.java

/**
 * Convenience method to check whether the given object is or can be made
 * into a listener.//from  w  ww  .  j  a v  a  2s.co  m
 *
 * @param target the object to check
 * @return true if the delegate is an instance of any of the listener
 * interface, or contains the marker annotations
 */
public static boolean isListener(Object target, Class<?> listenerType, ListenerMetaData[] metaDataValues) {
    if (target == null) {
        return false;
    }
    if (listenerType.isInstance(target)) {
        return true;
    }
    if (target instanceof Advised) {
        TargetSource targetSource = ((Advised) target).getTargetSource();
        if (targetSource != null && targetSource.getTargetClass() != null
                && listenerType.isAssignableFrom(targetSource.getTargetClass())) {
            return true;
        }

        if (targetSource != null && targetSource.getTargetClass() != null
                && targetSource.getTargetClass().isInterface()) {
            logger.warn(String.format(
                    "%s is an interface.  The implementing class will not be queried for annotation based listener configurations.  If using @StepScope on a @Bean method, be sure to return the implementing class so listener annotations can be used.",
                    targetSource.getTargetClass().getName()));
        }
    }
    for (ListenerMetaData metaData : metaDataValues) {
        if (MethodInvokerUtils.getMethodInvokerByAnnotation(metaData.getAnnotation(), target) != null) {
            return true;
        }
    }
    return false;
}

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