All Downloads are FREE. Search and download functionalities are using the official Maven repository.
  • Log In
  • Register

    • com.github.nill14.utils.init.impl.AnnotationLifecycleInitializer Maven / Gradle / Ivy

    package com.github.nill14.utils.init.impl;

import java.lang.annotation.Annotation;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Optional;
import java.util.stream.Stream;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.inject.Provider;

import com.github.nill14.utils.init.api.IPojoInitializer;

@SuppressWarnings("serial")
public class AnnotationLifecycleInitializer implements IPojoInitializer {

	@Override
	public void init(Provider factory, Object instance) {
		doPostConstruct(instance);
	}

	@Override
	public void destroy(Provider factory, Object instance) {
		doPreDestroy(instance);
		
	}
	
	private Optional getMethod(Object instance, Class annotationClass) {
		Method[] methods = instance.getClass().getDeclaredMethods();
		return Stream.of(methods)
				.filter(m -> !Modifier.isStatic(m.getModifiers()))
				.filter(m -> m.isAnnotationPresent(annotationClass))
				.findFirst();
	}	
	
	private Object invoke(Object instance, Method method, Object[] args) {
		try {
			return method.invoke(instance, args);
		} catch (IllegalAccessException | IllegalArgumentException e) {
			throw new RuntimeException(e);
		} catch (InvocationTargetException e) {
			throw new RuntimeException(e.getTargetException());
		}
	}
	
	private void doPreDestroy(Object instance) {
		Optional optional = getMethod(instance, PreDestroy.class);
		if (optional.isPresent()) {
			Method method = optional.get();
			method.setAccessible(true);
			invoke(instance, method, null);
		}
	}

	private void doPostConstruct(Object instance) {
		Optional optional = getMethod(instance, PostConstruct.class);
		if (optional.isPresent()) {
			Method method = optional.get();
			method.setAccessible(true);
			invoke(instance, method, null);
		}
	}

}
    
    
    
    

    




    
    
    © 2015 - 2025 Weber Informatics LLC | Privacy Policy