Validating User Input - Stripes...and Java Web Development is Fun Again - page 75

Start
validation

@Validate(required=true)

valid elds

@Validate(minlength=)
@Validate(maxlength=)
@Validate(mask=)

valid elds

Type Conversion

valid Number
elds

valid
non-Number
elds

@Validate(minvalue=)
@Validate(maxvalue=)

valid elds

@Validate(expression=)

Custom validation methods

Figure 4.7: Processing validations in order of priority

In the middle of the diagram, notice the box labeled “Type Conversion.”
I've briefly touched on the subject that Stripes performs type conver-
sion for all basic data types. If the type conversion passes and the prop-
erty type extends Number , then the minimum and maximum numerical
value validations are executed. We'll talk about type conversion in more
detail in Chapter 5 , There's More to Life Than Strings: Working with Data
Types, on page 98 .

After processing all built-in validations, Stripes moves on to custom
validation methods. This is where you get to do pretty much anything
you need to do to validate the input.