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    }