vb.net free barcode dll This page intentionally left blank in Java

Draw Code-39 in Java This page intentionally left blank

This page intentionally left blank
Scanning ANSI/AIM Code 39 In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
ANSI/AIM Code 39 Encoder In Java
Using Barcode drawer for Java Control to generate, create USS Code 39 image in Java applications.
Implementing Business Service Validation
Read Code 3 Of 9 In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
Barcode Encoder In Java
Using Barcode encoder for Java Control to generate, create bar code image in Java applications.
Quick Start Guide to Oracle Fusion Development
Scan Barcode In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
Create Code 39 Full ASCII In C#.NET
Using Barcode printer for .NET Control to generate, create Code39 image in .NET framework applications.
s you have been progressing through the chapters, you ve built a rich business service for your application to read, write, and manage data from a database. However, you ve not yet defined any validation rules for this application other than those that were already in the database. The next step is to add applicationspecific validation to the business service.
USS Code 39 Maker In .NET
Using Barcode creation for ASP.NET Control to generate, create Code 39 Extended image in ASP.NET applications.
Code 39 Full ASCII Generation In .NET
Using Barcode encoder for VS .NET Control to generate, create Code39 image in .NET applications.
Your application is more than just the reading and writing of information to and from a database. Within that application you ll want to define rules on what the user can do and what data values can be input. Do you really want to allow the user to set a credit limit for a new customer to be a million dollars ADF Business Components provides a rich, declarative validation framework that allows user input to be validated against a static value, a list of values, a numeric range, and even values returned from queries. The framework also provides a convenient way to hook up the validation mechanism to a Java method if you choose to write more complex validation rules in Java. In this chapter you will discover how ADF Business Components provides functionality for defining declarative and programmatic validation of data.
Make ANSI/AIM Code 39 In Visual Basic .NET
Using Barcode generation for .NET framework Control to generate, create Code39 image in .NET applications.
Data Matrix 2d Barcode Maker In Java
Using Barcode creation for Java Control to generate, create ECC200 image in Java applications.
Creating Validation Rules
Data Matrix ECC200 Encoder In Java
Using Barcode creator for Java Control to generate, create Data Matrix 2d barcode image in Java applications.
USS Code 128 Generation In Java
Using Barcode drawer for Java Control to generate, create Code 128A image in Java applications.
Validation rules, because they are working on data, are defined as part of the entity object and can be placed on an attribute or at the entity level. A validation rule defined on an entity object attribute fires when the attribute value is changed, whereas a validation rule defined at the entity level fires when changing rows or committing data. Entity-level validation rules are useful when the rule depends on more than one attribute value. For example, the maximum value for a customer s credit limit is dependent on their income level, and so it only makes sense to validate when both attribute values have been set. Regardless of the style of validation, or whether it is defined at the entity level or at the attribute level, the steps are similar. Open the entity object editor and select the Business Rules tab. Figure 9-1 shows the attributes and any validation rules already defined. At this point you might notice that validation rules already exist for some attributes. These are the framework
Make MSI Plessey In Java
Using Barcode generator for Java Control to generate, create MSI Plessey image in Java applications.
Code 128A Creation In .NET Framework
Using Barcode generator for .NET Control to generate, create Code 128 Code Set C image in VS .NET applications.
9:
DataMatrix Maker In None
Using Barcode creator for Font Control to generate, create Data Matrix image in Font applications.
Data Matrix 2d Barcode Decoder In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
Implementing Business Service Validation
Bar Code Maker In None
Using Barcode generator for Online Control to generate, create bar code image in Online applications.
Create Code 3/9 In .NET Framework
Using Barcode generation for VS .NET Control to generate, create USS Code 39 image in VS .NET applications.
FIGuRe 9-1. Entity object validation rules
USS Code 39 Recognizer In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
ANSI/AIM Code 39 Generation In None
Using Barcode drawer for Word Control to generate, create ANSI/AIM Code 39 image in Office Word applications.
implementation of the database constraints, such as defining that an attribute is mandatory, defined when creating the entity object.
Overview of Adding a Validation Rule
To add a validation rule, select an attribute or entity and click the green plus sign to display the Add Validation Rule dialog. From this dialog you can define the validation rule by clicking the
Quick Start Guide to Oracle Fusion Development
Rule Type drop-down list and choosing the type of rule. In addition, you can also define when the validation rule fires and how the information is reported back to the user.
Conditional execution of a Validation Rule
A powerful feature of the validation framework in ADF Business Components is that you can define a condition on which the validation will fire. For example, you might decide that the credit limit rule for a customer is only applied to non-U.S. customers. In this case you can add an expression, the result of which should return true if the validation rule is to fire and false if it is
9:
Implementing Business Service Validation
to be ignored. To set a conditional expression, select the Validation Execution tab on the Add Validation Rule dialog.
You can then add an expression, such as the one shown, that returns true or false.
Failure Handling
For any validation rule that fails, you can customize the message displayed to the user. Select the Failure Handling tab on the Add Validation Rule dialog. You can either directly type the message string or select it from a translatable message bundle. As well as defining the message text, you can also define whether the validation failure should be treated as a warning or as an error. If you set Validation Failure Severity to Error, then the framework will not allow a value that fails the validation check. If it is set to Informational Warning, then the message appears, but the new value is accepted.
Copyright © OnBarcode.com . All rights reserved.