[hibernate-dev] [Bean Validation] XML Mapping schema

[Emmanuel Bernard]

Here is my very first attempt to describe the constraint mapping XML  
schema.
I did not look at other product approach to avoid being tainted. If  
you have examples of alternative approach, I would appreciate a link.

A couple of comments:
- I would have preferred a Web Beans style XML approach but this kind  
of approach is getting some heavy resistance from some members of the  
expert committee. So I fell back to a more classic approach.
- constraints themselves cannot be defined: you have to write an  
actual annotation. I wonder if we should provide such model. At  
minimal we might want to provide a way to override the constraint  
validator for a given constraint.
- I used JPA 2 mapping schema as inspiration
- I stayed very close to the Java structure

Better names, enhancements, alternative proposals are welcome.

Emmanuel

<?xml version="1.0" encoding="UTF-8"?>
<validation-mappings>
    <package>com.acme.dvdstore.model</package>
    <bean class="Customer">
        <class>
            <constraint annotation="com.acme.validate.SafeCustomer">
                <attribute name="category">
                    <array- 
element>com.acme.validate.SecurityLevel.SECURED_COUNTRY</array-element>
                    <array- 
element>com.acme.validate.SecurityLevel.SECURED_ADDRESS</array-element>
                    <array- 
element>com.acme.validate.SecurityLevel.SECURED_FINANCIALS</array- 
element>
                </attribute>
                <attribute name="failPerCategory">false</attribute>
            </constraint>
        </class>
        <fields>
            <field name="firstname">
                <ignore-annotations/>
                <stop-inheritance/>
                <constraint annotation="javax.validation.Min">
                    <message>{error.tooSmall}</message>
                    <groups>
                        <group>javax.validation.groups.Default</group>
                    </groups>
                    <attribute name="value">45</attribute>
                </constraint>
            </field>
        </fields>
        <getters>
            <getter name="firstname">
                <ignore-annotations/>
                <stop-inheritance/>
                <constraint annotation="javax.validation.Min">
                    <message>{error.tooSmall}</message>
                    <groups>
                        <group>javax.validation.groups.Default</group>
                    </groups>
                    <attribute name="value">45</attribute>
                </constraint>
            </getter>
        </getters>
    </bean>
</validation-mappings>