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.translator; 016 017 import java.text.DateFormatSymbols; 018 import java.text.Format; 019 import java.text.SimpleDateFormat; 020 import java.util.Locale; 021 022 import org.apache.tapestry.valid.ValidationConstraint; 023 import org.apache.tapestry.valid.ValidationStrings; 024 025 /** 026 * A {@link java.text.SimpleDateFormat}-based {@link Translator} implementation. 027 * 028 * @author Paul Ferraro 029 * @since 4.0 030 */ 031 public class DateTranslator extends FormatTranslator 032 { 033 034 public DateTranslator() 035 { 036 } 037 038 // Needed until HIVEMIND-134 fix is available 039 public DateTranslator(String initializer) 040 { 041 super(initializer); 042 } 043 044 /** 045 * @see org.apache.tapestry.form.translator.FormatTranslator#defaultPattern() 046 */ 047 protected String defaultPattern() 048 { 049 return "MM/dd/yyyy"; 050 } 051 052 /** 053 * @see org.apache.tapestry.form.translator.FormatTranslator#getFormat(java.util.Locale) 054 */ 055 protected Format getFormat(Locale locale) 056 { 057 return getDateFormat(locale); 058 } 059 060 public SimpleDateFormat getDateFormat(Locale locale) 061 { 062 return new SimpleDateFormat(getPattern(), new DateFormatSymbols(locale)); 063 } 064 065 /** 066 * @see org.apache.tapestry.form.translator.FormatTranslator#getMessageKey() 067 */ 068 protected String getMessageKey() 069 { 070 return ValidationStrings.INVALID_DATE; 071 } 072 073 /** 074 * @see org.apache.tapestry.form.translator.AbstractTranslator#getMessageParameters(java.util.Locale, 075 * java.lang.String) 076 */ 077 protected Object[] getMessageParameters(Locale locale, String label) 078 { 079 String pattern = getDateFormat(locale).toLocalizedPattern().toUpperCase(locale); 080 081 return new Object[] 082 { label, pattern }; 083 } 084 085 /** 086 * @see org.apache.tapestry.form.translator.FormatTranslator#getConstraint() 087 */ 088 protected ValidationConstraint getConstraint() 089 { 090 return ValidationConstraint.DATE_FORMAT; 091 } 092 }