/*
* Copyright 2005-2010 the original author or authors.
*
* 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.dozer.converters;
import org.apache.commons.beanutils.Converter;
import javax.xml.datatype.XMLGregorianCalendar;
import java.lang.reflect.Constructor;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.util.Calendar;
/**
* Internal convertor for handling Date/Time conversions.
*
* Supported source data types include java.util.Date,
* java.sql.Date, java.sql.Time, java.sql.Timestamp, java.util.Calendar, javax.xml.datatype.XMLGregorianCalendar,
* java.lang.String and any objects that return a number of milliseconds applicable to java.lang.Long
* format in their toString() form.
*
* Supported return data types are all Date/Time types, which are based on a timestamp constructor
* (e.g. new MyDate(new Long(1))). Calendar return type is also supported.
*
* Only intended for internal use.
*
* @author tierney.matt
* @author dmitry.buzdin
*/
public class DateConverter implements Converter {
private DateFormat dateFormat;
public DateConverter(DateFormat dateFormat) {
this.dateFormat = dateFormat;
}
public Object convert(Class destClass, Object srcObj) {
final Class srcFieldClass = srcObj.getClass();
long time;
int nanos = 0;
if (Calendar.class.isAssignableFrom(srcFieldClass)) {
Calendar inVal = (Calendar) srcObj;
time = inVal.getTime().getTime();
} else if (Timestamp.class.isAssignableFrom(srcFieldClass)) {
Timestamp timestamp = (Timestamp) srcObj;
time = timestamp.getTime();
nanos = timestamp.getNanos();
} else if (java.util.Date.class.isAssignableFrom(srcFieldClass)) {
time = ((java.util.Date) srcObj).getTime();
} else if (XMLGregorianCalendar.class.isAssignableFrom(srcFieldClass)) {
time = ((XMLGregorianCalendar) srcObj).toGregorianCalendar().getTimeInMillis();
} else if (dateFormat != null && String.class.isAssignableFrom(srcObj.getClass())) {
try {
if ("".equals(srcObj)) {
return null;
}
time = dateFormat.parse((String) srcObj).getTime();
} catch (ParseException e) {
throw new ConversionException("Unable to parse source object using specified date format", e);
}
// Default conversion
} else {
try {
time = Long.parseLong(srcObj.toString());
} catch (NumberFormatException e) {
throw new ConversionException("Unable to determine time in millis of source object", e);
}
}
try {
if (Calendar.class.isAssignableFrom(destClass)) {
Constructor constructor = destClass.getConstructor();
Calendar result = (Calendar) constructor.newInstance();
result.setTimeInMillis(time);
return result;
}
Constructor constructor = destClass.getConstructor(Long.TYPE);
Object result = constructor.newInstance(time);
if (nanos != 0 && (Timestamp.class.isAssignableFrom(destClass))) {
((Timestamp) result).setNanos(nanos);
}
return result;
} catch (Exception e) {
throw new ConversionException(e);
}
}
}