Hibernate Validator - Creating custom constraints–Example

In this post, we will see how we can create our own custom constraints tailored to our specific requirements.

Hibernate Validator Example 2

In this example, we will see some more validation constraints such as @email, @past, @length, etc. And also we will also define custom error message.

Hibernate Validator Examples

Let us some examples for Hibernate validator
Here is the introduction notes from the hibernate documentation
Bean Validation standardizes how to define and declare domain model level constraints. You can, for example, express that a property should never be null, that the account balance should be strictly positive, etc. These domain model constraints are declared in the bean itself by annotating its properties. Bean Validation can then read them and check for constraint violations. The validation mechanism can be executed in different layers in your application without having to duplicate any of these rules (presentation layer, data access layer). Following the DRY principle, Bean Validation and its reference implementation Hibernate Validator has been designed for that purpose.
The integration between Hibernate and Bean Validation works at two levels. First, it is able to check in-memory instances of a class for constraint violations. Second, it can apply the constraints to the Hibernate metamodel and incorporate them into the generated database schema.
Each constraint annotation is associated to a validator implementation responsible for checking the constraint on the entity instance. A validator can also (optionally) apply the constraint to the Hibernate metamodel, allowing Hibernate to generate DDL that expresses the constraint. With the appropriate event listener, you can execute the checking operation on inserts, updates and deletes done by Hibernate.
When checking instances at runtime, Hibernate Validator returns information about constraint violations in a set of ConstraintViolations. Among other information, the ConstraintViolation contains an error description message that can embed the parameter values bundle with the annotation (eg. size limit), and message strings that may be externalized to a ResourceBundle.
Example 1:
In the first example, we will see very basic not null constraint validation. Here is the Step by Step Tutorial.
Example 2:
In the second example, we will see some more constraint validation. Here is the Step by Step Tutorial.
Example 3:
In this example, we will see how we can create our custom constraint validation. Here is the Step by Step Tutorial.
Example 4:
In this example, we will see how we can create our custom constraint @Required. Here is the Step by Step Tutorial.
Example 5:
In this example, nothing is new, we will take care example 2 and will use the utility class to perform validationHere is the Step by Step Tutorial.

Hibernate Validator Example 1

In this example, we will see very basic validation @NotNull.

ZK Examples Index Page

ZK Projects

ZK 7 Project Start-up Kit – Theme with full source code and support
Demo Link : User Name : demo, password : demo

 

     

ZK 8.5 Version Video Tutorials . All New created in July 2018

1. Create and Run your First ZK 8.5 Application with Eclipse and Maven
2. ZK 8.5 Component Reference Window - Part 1
3. ZK 8.5 Component Reference Window - Part 2
4. ZK 8.5 Component Reference Layout - vlayout and hlayout
5. ZK 8.5 Component Reference Textbox Part 1
6. ZK 8.5 Component Reference Textbox Part 2
7. ZK 8.5 Component Reference Grid Part 1
8. Sample UI Design Form in 8.5 Part 1
9. CSS Classes and Styles
10. Sample Screens for Training to Create UI in ZK


ZK Free Examples and Tutorials
 
     
ZK Maven Create and Run Your First ZK 7 Application with Eclipse and Maven  
ZK 7 ZK 7 Simple Form Design(s) Part 1  
ZK 7 ZK with External style sheet  
ZK MVVM MVVM – Introduction  
ZK MVVM MVVM Examples–Example 1  
ZK MVVM MVVM Examples–Example 2  
ZK 7 ZK MVVM Simple List Box Example  
ZK 7 How to show particular row in ZK Listbox with different color in MVVM  
ZK 7 ZK 7 MVVM List Box Select All and Unselect all Records  
ZK 7 ZK MVVM List box with check box – Simple Example  
ZK List Box Move List box item up and Down using MVVM Design Pattern  
ZK List Box List Item Double click event on selected Item using MVVM  
ZK List Box ZK List box inline Editing with Add New and Delete action  
ZK List Box ZK MVVM List box with Dynamic Template  
ZK 7 Hibernate ZK 7 + MySQL + Hibernate + Spring + Integration example  
ZK 7 Excel ZK 7 Export to Excel  
ZK File Upload Simple example to upload PDF file in the server and show the content using iframe - MVVM  
ZK File Upload ZK 7 upload PDF to server and show in the screen using MVVM–Part 2  
ZK Tab box Load Tab box Content on Demand Using MVVM  (Onselect Event)  
ZK Grid ZK Grid inline Editing with Add New and Delete action  
ZK Upload ZK Dropupload example  
ZK Report Create a Report with ZK using iReport 5.1.0 and JasperReports  
ZK Menu ZK Dynamic Menu Part 1 Demo
ZK Tree ZK Dynamic Menu Part 2 Using Tree Component Demo
ZK Group Box ZK Dynamic Menu Part 3 Using Group Box and Tool Bar Button Demo
ZK Tab Box ZK Dynamic Menu Part 4 Using Tab box and Tool Bar Button Demo
ZK Menu ZK Dynamic Menu Part 5 Using Tab Box, Tool Bar and Group Box Demo
ZK 7 Nav Bar ZK Dynamic Menu Part 6 Using ZK 7 Navigation Bar  
ZK Combo MVC Two combo Box – Fill second combo based on first combo selection  
ZK Combo ZK MVVM Combo Box value Converter  
ZK Validation Simple Example for ZK Input Form Validation  
ZK MVC Listing Search using MVC Pattern Demo
ZK MVC Passing arguments Part 1, This article will focus on the How to pass some arguments from one window(Parent) to modal window(Child) where child window does not have any controller attached. Demo
ZK MVC Passing arguments Part 2, This article will focus on the How to pass some arguments from one window(Parent) to modal window(Child) where child window attached to the controller and we will receive the arguments in the controller and display back to UI. Demo
ZK MVC Passing arguments Part 3, This article will focus on the How to pass some arguments from one window(Parent) to modal window(Child) where child window attached to the controller and we will receive the arguments in the controller and display back to UI. Same as Part 2, but we will use ZK ‘s annotated data binding manager utility. Demo
ZK MVC Passing arguments Part 4, This article will focus on the How to return values from the child window (Modal) to the Calling Parent Window using ZK Event Queues concept. Demo
ZK MVC Passing arguments Part 5, This article will focus on the How to return values from the child window (Modal) to the Calling Parent Window using ZK Send Event Demo
ZK MVC Passing arguments Example on Passing arguments in MVC Demo
ZK MVVM Passing arguments Part 1, This article will focus on the How to pass some arguments from one window(Parent) to modal window(Child) where child window does not have any VM attached. Demo
ZK MVVM Passing arguments Part 2, This article will focus on the How to pass some arguments from one window(Parent) to modal window(Child) where child window attached with VM and arguments are received in the VM and update the UI. Demo
ZK MVVM Passing arguments Part 3, This article will focus on the How to pass some arguments from one window(Parent) to modal window(Child) where child window attached with VM and arguments are received in the VM and update the UI. After child window is closed, we will return the value to the parent window. Demo
ZK MVVM Passing arguments Part 4, In this post, we will see how we can pass parameter between two zul files attached by MVVM using URL Redirect Demo
ZK Login Form CSS ZK Login form Design  
ZK Login ZK + Spring Security Login form–Part 1  
ZK Login ZK + Spring Security Login form–Part 2  
ZK Login ZK + Spring Security Login form–Part 3  
ZK Login ZK + Spring Security Login form– Additional Login Parameters - Part 4  
ZK Login ZK + Spring Security Login form–Part 5  

ZK 7 CSS

ZK Window ZK 7 Window CSS Example1  
ZK Group Box ZK 7 Group Box Example 1  
ZK 7 ZK 7 Message box CSS  
ZK TextBox Small Search Box  

 


ZK 6 CSS

Please Note : All the below Examples will work correctly only on ZK 5 and ZK 6 Version

ZK Button Stylish Button created using ZK Link component. Demo
ZK Button Part 2 Stylish Button created using ZK Link component. Demo
ZK Button Part 3 Stylish Button created using ZK Link component. Demo
ZK Button ZK Fancy Buttons Demo
ZK TextBox Big Search Box. Demo
ZK TextBox CSS3 Search Box. Demo
ZK Login Sample Login Form Design in ZK  
ZK Grid Customize ZK Grid CSS  
ZK Tab Box Tabbed Dialog Form - 2 Demo
ZK Tab Box Tabbed Dialog Form - 1 Demo
ZK Tab Box Navigation Menu  
ZK Menu ZK Vertical Menu  
ZK Form ZK Form Design CRUD Example  
ZK Form Search Screen Example  
ZK Form Multi Column Big Screen Design  
ZK Search ZK Search Box  
ZK Button ZK Button CSS Customization  
ZK Window ZK Modal Window CSS Customization  
ZK ListBox ZK Listbox CSS  
ZK Panel ZK Panel CSS Customization  
ZK Messagebox ZK Message box CSS  
ZK ToolBar ZK Tabbox with Tool Bar Button  
CSS File How to Refer External CSS File in ZUL  
ZK Button Button Collection  
ZK Window ZK Window CSS  
ZK Group Box Group Box with Collapse and Expand Button in the Right  


ZK Small Application

ZK MVVM CRUD Example without DB Connection
Step by step tutorial on ZK MVVM CRUD Operation without any DB Connection. online Demo here

ZK MVVM With Spring + JPA + Hibernate Entity Manager
Step by step Tutorial on how to Integrate ZK With spring and JPA (Hibernate vendor)

ZK MVVM With Spring + Hibernate 4 API Direct
Step by step Tutorial on how to Integrate ZK With spring and Hibernate API

 

ZK MVC CRUD With Spring 3 + JPA + Hibernate 4 Entity Manager.
A simple CRUD Application based on JPA. Step by step Tutorial on how to create simple CRUD application using ZK as Presentation layer with Spring 3 and JPA (Hibernate vendor).

 
ZK + Spring Security Custom Login form.
Step by step Tutorial on how to integrate ZK and Spring security


ZK + Spring + MVVM + Hibernate - Small Application

Highlights
1. ZK Maven Project Steps
2. Spring Security integration with custom login form
3. Spring and Hibernate integration
4. Generic DAO and Service Layer
5. Theme customization by each user
6. jQuery integration with ZK Framework
7. Store Image in the Database
8. Validation using Hibernate Validator

 

 

ZK 7 + Spring + MVVM + Hibernate + MySQL + List Box

Highlights
1. ZK Maven Project Steps
2. Spring and Hibernate integration
3. Explained the following features in ZK List box

a) Format the amount field and show the currency symbol.
b) Column sorting.
c) Showing date fields in preferred format using ZK Converter.
d) Showing phone numbers in preferred format using ZK Converter.
e) Use EL expression to call a method in a ViewModel.
f) Binding label value according to run time value.
g) Dynamic sclass based on value.
h) Dynamic Template.

Hibernate n+1 problem

First let us try to understand what n+1 Problem in hibernate

MVVM Command annotation and Notify change example

Here is an example, how to pass parameter on a zul through MVVM Command binding annotation.

EMR Most Commonly used Vital sign

ZK Hibernate one to Many annotation mapping bidirectional CRUD example using MVVM

In this post, we will see how we can implement hibernate one to Many mapping (master & detail) bidirectional using ZK Components

One to many mapping using bidirectional relationship – onetoMany as Owner

First let us look the hibernate documentation on this as follows

Sample HL7 Files

LAB Test Panels

Let us see some most commonly used panels.

EMR In-house Lab workflow

Back to domain Smile

In my last company, we follow the below workflow for the in-house lab order. Please note : Even though I mention as use case, but it may not have all the typical structure of a use case. I will explain in my own way. 

One to many mapping using bidirectional relationship– ManytoOne as owner

First let is look the hibernate documentation on this as follows

Hibernate–Java Environment setup

We will see how we can setup the Environment in eclipse to learn our examples in hibernate.