public DefaultAnnotationProcessor(Context context) 
{
    
        this.context = context;
}

 protected static  void lookupFieldResource(Context context,
    Object instance,
    Field field,
    String name) throws NamingException, IllegalAccessException 
{
    
        Object lookedupResource = null;
        boolean accessibility = false;
        if ((name != null) &&
                (name.length()  > 0)) {
            lookedupResource = context.lookup(name);
        } else {
            lookedupResource = context.lookup(instance.getClass().getName() + "/" + field.getName());
        }
        accessibility = field.isAccessible();
        field.setAccessible(true);
        field.set(instance, lookedupResource);
        field.setAccessible(accessibility);
}

Inject resources in specified field.

 protected static  void lookupMethodResource(Context context,
    Object instance,
    Method method,
    String name) throws NamingException, InvocationTargetException, IllegalAccessException 
{
        
        if (!method.getName().startsWith("set") 
                || method.getParameterTypes().length != 1
                || !method.getReturnType().getName().equals("void")) {
            throw new IllegalArgumentException("Invalid method resource injection annotation");
        }
        Object lookedupResource = null;
        boolean accessibility = false;
        if ((name != null) &&
                (name.length()  > 0)) {
            lookedupResource = context.lookup(name);
        } else {
            lookedupResource = 
                context.lookup(instance.getClass().getName() + "/" + method.getName().substring(3));
        }
        accessibility = method.isAccessible();
        method.setAccessible(true);
        method.invoke(instance, lookedupResource);
        method.setAccessible(accessibility);
}

Inject resources in specified method.

 public  void postConstruct(Object instance) throws InvocationTargetException, IllegalAccessException 
{
        
        Method[] methods = instance.getClass().getDeclaredMethods();
        Method postConstruct = null;
        for (int i = 0; i <  methods.length; i++) {
            if (methods[i].isAnnotationPresent(PostConstruct.class)) {
                if ((postConstruct != null) 
                        || (methods[i].getParameterTypes().length != 0)
                        || (Modifier.isStatic(methods[i].getModifiers())) 
                        || (methods[i].getExceptionTypes().length  > 0)
                        || (!methods[i].getReturnType().getName().equals("void"))) {
                    throw new IllegalArgumentException("Invalid PostConstruct annotation");
                }
                postConstruct = methods[i];
            }
        }
        // At the end the postconstruct annotated 
        // method is invoked
        if (postConstruct != null) {
            boolean accessibility = postConstruct.isAccessible();
            postConstruct.setAccessible(true);
            postConstruct.invoke(instance);
            postConstruct.setAccessible(accessibility);
        }
}

Call postConstruct method on the specified instance.

 public  void preDestroy(Object instance) throws InvocationTargetException, IllegalAccessException 
{
        
        Method[] methods = instance.getClass().getDeclaredMethods();
        Method preDestroy = null;
        for (int i = 0; i <  methods.length; i++) {
            if (methods[i].isAnnotationPresent(PreDestroy.class)) {
                if ((preDestroy != null) 
                        || (methods[i].getParameterTypes().length != 0)
                        || (Modifier.isStatic(methods[i].getModifiers())) 
                        || (methods[i].getExceptionTypes().length  > 0)
                        || (!methods[i].getReturnType().getName().equals("void"))) {
                    throw new IllegalArgumentException("Invalid PreDestroy annotation");
                }
                preDestroy = methods[i];
            }
        }
        // At the end the postconstruct annotated 
        // method is invoked
        if (preDestroy != null) {
            boolean accessibility = preDestroy.isAccessible();
            preDestroy.setAccessible(true);
            preDestroy.invoke(instance);
            preDestroy.setAccessible(accessibility);
        }
}

Call preDestroy method on the specified instance.

 public  void processAnnotations(Object instance) throws NamingException, InvocationTargetException, IllegalAccessException 
{
        
        if (context == null) {
            // No resource injection
            return;
        }
        // Initialize fields annotations
        Field[] fields = instance.getClass().getDeclaredFields();
        for (int i = 0; i <  fields.length; i++) {
            if (fields[i].isAnnotationPresent(Resource.class)) {
                Resource annotation = (Resource) fields[i].getAnnotation(Resource.class);
                lookupFieldResource(context, instance, fields[i], annotation.name());
            }
            if (fields[i].isAnnotationPresent(EJB.class)) {
                EJB annotation = (EJB) fields[i].getAnnotation(EJB.class);
                lookupFieldResource(context, instance, fields[i], annotation.name());
            }
            if (fields[i].isAnnotationPresent(WebServiceRef.class)) {
                WebServiceRef annotation = 
                    (WebServiceRef) fields[i].getAnnotation(WebServiceRef.class);
                lookupFieldResource(context, instance, fields[i], annotation.name());
            }
            if (fields[i].isAnnotationPresent(PersistenceContext.class)) {
                PersistenceContext annotation = 
                    (PersistenceContext) fields[i].getAnnotation(PersistenceContext.class);
                lookupFieldResource(context, instance, fields[i], annotation.name());
            }
            if (fields[i].isAnnotationPresent(PersistenceUnit.class)) {
                PersistenceUnit annotation = 
                    (PersistenceUnit) fields[i].getAnnotation(PersistenceUnit.class);
                lookupFieldResource(context, instance, fields[i], annotation.name());
            }
        }
        // Initialize methods annotations
        Method[] methods = instance.getClass().getDeclaredMethods();
        for (int i = 0; i <  methods.length; i++) {
            if (methods[i].isAnnotationPresent(Resource.class)) {
                Resource annotation = (Resource) methods[i].getAnnotation(Resource.class);
                lookupMethodResource(context, instance, methods[i], annotation.name());
            }
            if (methods[i].isAnnotationPresent(EJB.class)) {
                EJB annotation = (EJB) methods[i].getAnnotation(EJB.class);
                lookupMethodResource(context, instance, methods[i], annotation.name());
            }
            if (methods[i].isAnnotationPresent(WebServiceRef.class)) {
                WebServiceRef annotation = 
                    (WebServiceRef) methods[i].getAnnotation(WebServiceRef.class);
                lookupMethodResource(context, instance, methods[i], annotation.name());
            }
            if (methods[i].isAnnotationPresent(PersistenceContext.class)) {
                PersistenceContext annotation = 
                    (PersistenceContext) methods[i].getAnnotation(PersistenceContext.class);
                lookupMethodResource(context, instance, methods[i], annotation.name());
            }
            if (methods[i].isAnnotationPresent(PersistenceUnit.class)) {
                PersistenceUnit annotation = 
                    (PersistenceUnit) methods[i].getAnnotation(PersistenceUnit.class);
                lookupMethodResource(context, instance, methods[i], annotation.name());
            }
        }
}

Inject resources in specified instance.