    001    // Copyright 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.Validator;
    018
    019    /**
    020     * Base class for constructing a {@link org.apache.tapestry5.Validator}.
    021     */
    022    public abstract class AbstractValidator<C, T> implements Validator<C, T>
    023    {
    024        private final Class<C> constraintType;
    025
    026        private final Class<T> valueType;
    027
    028        private final String messageKey;
    029
    030        protected AbstractValidator(Class<C> constraintType, Class<T> valueType, String messageKey)
    031        {
    032            this.constraintType = constraintType;
    033            this.valueType = valueType;
    034            this.messageKey = messageKey;
    035        }
    036
    037        public final Class<C> getConstraintType()
    038        {
    039            return constraintType;
    040        }
    041
    042        public final Class<T> getValueType()
    043        {
    044            return valueType;
    045        }
    046
    047        public final String getMessageKey()
    048        {
    049            return messageKey;
    050        }
    051
    052        /**
    053         * Return false, which is correct for the vast majority of validators. {@link org.apache.tapestry5.validator.Required}
    054         * overrides this to true.F
    055         */
    056        public boolean isRequired()
    057        {
    058            return false;
    059        }
    060    }