UniqueUsername.java

package jpaoletti.jpm.validator;

import jpaoletti.jpm.core.PMContext;
import jpaoletti.jpm.core.message.MessageFactory;
import jpaoletti.jpm.core.operations.OperationCommandSupport;
import jpaoletti.jpm.security.core.PMSecurityUser;
import jpaoletti.jpm.security.core.UserNotFoundException;

/**
 * Check that the username is unique
 * 
 * @author jpaoletti
 */
public class UniqueUsername extends ValidatorSupport {

    @Override
    public ValidationResult validate(PMContext ctx) {
        final ValidationResult res = new ValidationResult();
        res.setSuccessful(true);
        try {
            final PMSecurityUser user = (PMSecurityUser) ctx.getSelected().getInstance();
            if (ctx.getPresentationManager().getSecurityConnector(ctx).getUser(user.getUsername()) != null) {
                res.setSuccessful(false);
                res.getMessages().add(MessageFactory.error(ctx.getEntity(), ctx.getEntity().getFieldById("username"), "username.not.unique"));
            }
        } catch (UserNotFoundException ex) {
        } catch (Exception ex) {
            res.getMessages().add(MessageFactory.error(ctx.getEntity(), ctx.getEntity().getFieldById("username"), OperationCommandSupport.UNESPECTED_ERROR));
            res.setSuccessful(false);
        }
        return res;
    }
}