Using Declarative Validation: Built-in Rules

• Built-in rules greatly reduce the need for coding.
• Include the following types of rules:
• Defined only at entity level:
• Collection validator
• Unique key validator
• Can be defined at entity or attribute level, but pertain to an EO attribute:
• Compare validator
• Key exists validator
• Length validator
• List validator
• Range validator
• Regular expression validator
• Can be defined at entity or attribute level to validate the EO or the attribute:
• Script Expression validator
• Method validator