001 // Copyright 2005 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.tapestry.form.validator; 016 017 import org.apache.hivemind.util.PropertyUtils; 018 import org.apache.tapestry.IMarkupWriter; 019 import org.apache.tapestry.IRequestCycle; 020 import org.apache.tapestry.form.FormComponentContributorContext; 021 import org.apache.tapestry.form.IFormComponent; 022 023 /** 024 * Abstract implementation of {@link org.apache.tapestry.form.validator.Validator}. 025 * 026 * @author Howard Lewis Ship 027 * @since 4.0 028 */ 029 030 public abstract class BaseValidator implements Validator 031 { 032 private String _message; 033 034 public String getMessage() 035 { 036 return _message; 037 } 038 039 public void setMessage(String message) 040 { 041 _message = message; 042 } 043 044 public BaseValidator() 045 { 046 } 047 048 public BaseValidator(String initializer) 049 { 050 PropertyUtils.configureProperties(this, initializer); 051 } 052 053 /** 054 * Returns false. 055 */ 056 057 public boolean getAcceptsNull() 058 { 059 return false; 060 } 061 062 /** 063 * Does nothing. 064 */ 065 066 public void renderContribution(IMarkupWriter writer, IRequestCycle cycle, 067 FormComponentContributorContext context, IFormComponent field) 068 { 069 } 070 071 /** 072 * Returns false. Subclasses may override. 073 */ 074 075 public boolean isRequired() 076 { 077 return false; 078 } 079 }