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
015package org.apache.tapestry5.validator;
016
017import org.apache.tapestry5.Validator;
018
019/**
020 * Base class for constructing a {@link org.apache.tapestry5.Validator}.
021 */
022public 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}