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'databene commons' is an open source Java library by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
/*
* Copyright (C) 2004-2014 Volker Bergmann ([email protected]).
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.databene.commons.converter;
import org.databene.commons.ConversionException;
import org.databene.commons.Patterns;
import org.databene.commons.StringUtil;
import java.util.Date;
import java.util.Locale;
import java.text.ParseException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
/**
* Converts Strings of standard date(time) format (yyyy-MM-dd[Thh:mm[:ss[.SSS]]]) to dates.
*
* Created: 07.09.2007 09:07:12
* @author Volker Bergmann
*/
public class String2DateConverter extends ThreadSafeConverter implements Patterns {
// TODO support time zones (like 'Z', '+01:00' or '-01:30')
private String pattern;
private Locale locale;
public String2DateConverter() {
this(null);
}
public String2DateConverter(String pattern) {
this(pattern, Locale.getDefault());
}
@SuppressWarnings("unchecked")
public String2DateConverter(String pattern, Locale locale) {
this(pattern, locale, (Class) java.util.Date.class);
}
public String2DateConverter(String pattern, Locale locale, Class targetType) {
super(String.class, targetType);
this.pattern = pattern;
this.locale = locale;
}
@Override
@SuppressWarnings("unchecked")
public E convert(String sourceValue) {
return (E) convert(sourceValue, pattern, locale, targetType);
}
public static Date convert(String sourceValue, String pattern, Locale locale, Class targetType) {
sourceValue = StringUtil.trimmedEmptyToNull(sourceValue);
if (sourceValue == null)
return null;
try {
DateFormat format;
sourceValue = sourceValue.replace(' ', 'T');
if (pattern != null) {
format = new SimpleDateFormat(pattern, locale);
} else if (sourceValue.indexOf('T') > 0) {
switch (sourceValue.length()) {
case 16 : format = new SimpleDateFormat(DEFAULT_DATETIME_MINUTES_PATTERN); break;
case 19 : format = new SimpleDateFormat(DEFAULT_DATETIME_SECONDS_PATTERN); break;
case 23 : format = new SimpleDateFormat(DEFAULT_DATETIME_MILLIS_PATTERN); break;
default : throw new IllegalArgumentException("Not a supported date format: " + sourceValue);
}
} else {
format = new SimpleDateFormat(DEFAULT_DATE_PATTERN);
}
java.util.Date simpleDate = format.parse(sourceValue);
if (targetType == java.util.Date.class)
return simpleDate;
else if (targetType == java.sql.Date.class)
return new java.sql.Date(simpleDate.getTime());
else if (targetType == java.sql.Timestamp.class)
return new java.sql.Timestamp(simpleDate.getTime());
else
throw new UnsupportedOperationException("Not a supported target type: " + targetType);
} catch (ParseException e) {
throw new ConversionException(e);
}
}
}