package org.imageconverter.util;
   
   import java.util.Objects;
   
   import org.springframework.beans.factory.ObjectProvider;
   import org.springframework.context.ApplicationContext;
   import org.springframework.context.ApplicationContextAware;
   import org.springframework.core.env.Environment;
   import org.springframework.stereotype.Component;
  
  /**
   * Utils to retrieves spring objects to non managed objects.
   * 
   * @author Fernando Romulo da Silva
   */
  @Component
  public class BeanUtil implements ApplicationContextAware {
  
      private static ApplicationContext context;
  
      /**
       * Set the spring context to retrive objects.
       * 
       * @param newContext The new context
       */
      public static void defineContext(final ApplicationContext newContext) {
  
  	if (Objects.isNull(context)) {
  	    context = newContext;
  	}
      }
  
      /**
       * Get a bean from its type.
       * 
       * @param <T>       The type
       * @param beanClass The class type
       * @return A bean retrieved
       */
      public static <T> T getBeanFrom(final Class<T> beanClass) {
  	return context.getBean(beanClass);
      }
  
      /**
       * Get a bean provider (factory) from its type.
       * 
       * @param <T>       The type
       * @param beanClass The class type
       * @return A bean retrieved
       */
      public static <T> ObjectProvider<T> getBeanProviderFrom(final Class<T> beanClass) {
  	return context.getBeanProvider(beanClass);
      }
  
      /**
       * Get the context environment
       * 
       * @return A {@link Environment} object
       */
      public static Environment getEnvironment() {
  	return context.getEnvironment();
      }
  
      /**
       * Get the property value.
       * 
       * @param key The property value
       * @return The String value property
       */
      public static String getPropertyValue(final String key) {
  	return context.getEnvironment().getProperty(key);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void setApplicationContext(final ApplicationContext applicationContext) {
  	defineContext(applicationContext);
      }
  }