UriVal.java example

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abiquo-master
/**
 * Abiquo community edition
 * cloud management application for hybrid clouds
 * Copyright (C) 2008-2010 - Abiquo Holdings S.L.
 *
 * This application is free software; you can redistribute it and/or
 * modify it under the terms of the GNU LESSER GENERAL PUBLIC
 * LICENSE as published by the Free Software Foundation under
 * version 3 of the License
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * LESSER GENERAL PUBLIC LICENSE v.3 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

package com.abiquo.model.validation;

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.regex.Pattern;

import javax.validation.Constraint;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.Payload;

@Documented
@Constraint(validatedBy = UriVal.Validator.class)
@Target({METHOD, FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface UriVal
{
    boolean required() default true;

    String message() default "invalid uri";

    Class< ? >[] groups() default {};

    Class< ? extends Payload>[] payload() default {};

    static Pattern pattern =
        Pattern
            .compile(
                "^([a-z0-9+.-]+):(?://(?:((?:[a-z0-9-._~!$&'()*+,;=:]|%[0-9A-F]{2})*)@)?((?:[a-z0-9-._~!$&'()*+,;=]|%[0-9A-F]{2})*)(?::(\\d*))?(/(?:[a-z0-9-._~!$&'()*+,;=:@/]|%[0-9A-F]{2})*)?|(/?(?:[a-z0-9-._~!$&'()*+,;=:@]|%[0-9A-F]{2})+(?:[a-z0-9-._~!$&'()*+,;=:@/]|%[0-9A-F]{2})*)?)(?:\\?((?:[a-z0-9-._~!$&'()*+,;=:/?@]|%[0-9A-F]{2})*))?(?:#((?:[a-z0-9-._~!$&'()*+,;=:/?@]|%[0-9A-F]{2})*))?$",
                Pattern.CASE_INSENSITIVE);

    static class Validator implements ConstraintValidator<UriVal, String>
    {
        @Override
        public void initialize(final UriVal constraintAnnotation)
        {
        }

        @Override
        public boolean isValid(final String value, final ConstraintValidatorContext context)
        {
            boolean valid = pattern.matcher(value).matches();

            if (!valid)
            {
                context.disableDefaultConstraintViolation();
                context.buildConstraintViolationWithTemplate("invalid uri: " + value)
                    .addConstraintViolation();
            }

            return valid;
        }
    }
}