Grails GORM constrained properties: check if a domain attributes properties mapping

Consider a grails domain class like below:

---

package com.pritom.domains.customer

class Customer {
    Integer id;
    String customerId
    String email;
    String password
    Date dateCreated = new Date()
    Date lastUpdated = new Date()

    static mapping = {

    }

    static constraints = {
        customerId unique: true
        email unique: true
        creditCard(nullable: true);
    }
}

Now get domain class constrained properties:

---

def domainClass = new DefaultGrailsDomainClass(com.pritom.domains.Customer)
def constrainedProperties = domainClass.constrainedProperties;

Now check if specific field has some specific property

---

String key = "customerId";

if (constrainedProperties.containsKey(key)) {
    ConstrainedProperty v = (ConstrainedProperty) constrainedProperties.get(key);
    if(v.isNullable()) println 'Nullable';
    if(v.isBlank()) println 'Blank';
    if(v.isCreditCard()) println 'Credit Card';
    if(v.isDisplay()) println 'Display';
    if(v.isEditable()) println 'Editable';
    if(v.isEmail()) println 'Email';
}

And you can check more properties as you wish.

http://pritomkumar.blogspot.com/2013/09/javagrails-class-constrainedproperty.html

[Java/Grails] Class ConstrainedProperty

org.codehaus.groovy.grails.validation

[Java/Grails] Class ConstrainedProperty

java.lang.Object
  org.codehaus.groovy.grails.validation.ConstrainedProperty 

Method Summary
void	addMetaConstraint(java.lang.String name, java.lang.Object value) Obtains the value of the named meta constraint.
void	applyConstraint(java.lang.String constraintName, java.lang.Object constrainingValue) Applies a constraint for the specified name and consraint value.
Constraint	getAppliedConstraint(java.lang.String name) @param constraintName The name of the constraint to check
java.util.Collection	getAppliedConstraints() Obtains an applied constraint by name.
java.util.Map	getAttributes()
java.lang.String	getFormat()
java.util.List	getInList() @return Returns the inList.
java.lang.String	getMatches() @return Returns the matches.
java.lang.Comparable	getMax()
java.lang.Integer	getMaxSize()
java.lang.Object	getMetaConstraintValue(java.lang.String name)
java.lang.Comparable	getMin() @return Returns the min.
java.lang.Integer	getMinSize() @return Returns the minSize.
java.lang.Object	getNotEqual() @return Returns the notEqual.
int	getOrder() @param order The order to set.
java.lang.String	getPropertyName() @return Returns the propertyName.
java.lang.Class	getPropertyType() @return Returns the max.
groovy.lang.Range	getRange() @return Returns the range.
java.lang.Integer	getScale() @return The scale, if defined for this property; null, otherwise
groovy.lang.Range	getSize() @param size The size to set.
java.lang.String	getWidget()
boolean	hasAppliedConstraint(java.lang.String constraintName) @return Returns the propertyType.
static boolean	hasRegisteredConstraint(java.lang.String constraintName) @return Returns the appliedConstraints.
boolean	isBlank() @return the blank.
boolean	isCreditCard()
boolean	isDisplay() @return Returns the display.
boolean	isEditable() @param editable The editable to set.
boolean	isEmail() @return Returns the email.
boolean	isNullable() @return Returns the nullable.
boolean	isPassword()
boolean	isUrl()
static void	registerNewConstraint(java.lang.String name, java.lang.Class constraintClass)
static void	registerNewConstraint(java.lang.String name, ConstraintFactory factory)
static void	removeConstraint(java.lang.String name, java.lang.Class constraintClass)
static void	removeConstraint(java.lang.String name)
void	setAttributes(java.util.Map attributes)
void	setBlank(boolean blank)
void	setCreditCard(boolean creditCard)
void	setDisplay(boolean display) @return Returns the editable.
void	setEditable(boolean editable) @return Returns the order.
void	setEmail(boolean email)
void	setFormat(java.lang.String format)
void	setInList(java.util.List inList)
void	setMatches(java.lang.String regex)
void	setMax(java.lang.Comparable max) @param max The max to set.
void	setMaxSize(java.lang.Integer maxSize) @param maxSize The maxSize to set.
void	setMessageSource(org.springframework.context.MessageSource source)
void	setMin(java.lang.Comparable min) @param min The min to set.
void	setMinSize(java.lang.Integer minSize) @param minSize The minLength to set.
void	setNotEqual(java.lang.Object notEqual) @param notEqual The notEqual to set.
void	setNullable(boolean nullable)
void	setOrder(int order)
void	setPassword(boolean password)
void	setPropertyName(java.lang.String propertyName) @return Returns the url.
void	setRange(groovy.lang.Range range)
void	setSize(groovy.lang.Range size)
void	setUrl(boolean url)
void	setWidget(java.lang.String widget)
boolean	supportsContraint(java.lang.String constraintName) Checks with this ConstraintedProperty instance supports applying the specified constraint.
java.lang.String	toString()
void	validate(java.lang.Object target, java.lang.Object propertyValue, org.springframework.validation.Errors errors)