    001    // Copyright 2007, 2008 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    //     http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.validator;
    016
    017    import org.apache.tapestry5.Field;
    018    import org.apache.tapestry5.MarkupWriter;
    019    import org.apache.tapestry5.ValidationException;
    020    import org.apache.tapestry5.ioc.MessageFormatter;
    021    import org.apache.tapestry5.services.FormSupport;
    022
    023    /* A vaidator that enforces that a number is greater than some minimum integer value. */
    024    public class Min extends AbstractValidator<Long, Number>
    025    {
    026        public Min()
    027        {
    028            super(Long.class, Number.class, "min-integer");
    029        }
    030
    031        public void validate(Field field, Long constraintValue, MessageFormatter formatter, Number value)
    032                throws ValidationException
    033        {
    034            if (value.longValue() < constraintValue)
    035                throw new ValidationException(buildMessage(formatter, field, constraintValue));
    036        }
    037
    038        private String buildMessage(MessageFormatter formatter, Field field, Long constraintValue)
    039        {
    040            return formatter.format(constraintValue, field.getLabel());
    041        }
    042
    043        public void render(Field field, Long constraintValue, MessageFormatter formatter, MarkupWriter writer,
    044                           FormSupport formSupport)
    045        {
    046            formSupport.addValidation(field, "min", buildMessage(formatter, field, constraintValue), constraintValue);
    047        }
    048    }