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}