User Guide

Advanced topics in data integration 299
Custom Lets you add a custom class to check for this special kind of validation. Your code
should call the validate function when the field is assigned a new value, inspect the value, and
determine whether it’s valid. If it is, the function should simply return. If not, the function should
call
this.ValidationError(“some informative message”);. The custom class must be in
the classpath and formatted as shown in the following example:
class myCustomType extends mx.databinding.CustomValidator {
function validate(value) {
... some code here
}
}
DataProvider
No validation options.
Date No validation options.
DeltaPacket No validation options.
Integer A validation option can be set up to define the minimum and maximum values.
Number A validation option can be set up to define the minimum and maximum values.
Object No validation options.
PhoneNumber No validation options.
SocialSecurity No validation options.
String A validation option can be set up to define the minimum and maximum number of
characters.
XML Lets you specify if white space should be ignored when a string is converted into XML.
ZipCode No validation options.
Note: The following data types can perform validation: Custom, Integer, Number, PhoneNumber,
SocialSecurity, String, ZipCode. The following data types can convert from various other data types
when you assign to them: Boolean, DataProvider, Integer, Number, String, XML.
You can create custom data types. The number of data types allowed is unlimited. Data types are
defined by XML files found in the Flash MX Professional 2004 Configuration/DataTypes folder.
The definition includes the following metadata:
• An ActionScript class that will be instantiated for validation and type conversion
• A Validation Options dialog box
• The name of the standard formatter, which you can override using the formatter property
• Initial values for required, read-only, and default values