/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.util;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import org.geotools.factory.Hints;
/**
* Converter factory which created converting between the various temporal types.
* <p>
* Supported save conversions:
* <ul>
* <li>{@link java.util.Date} to {@link Calendar}
* <li>{@link java.sql.Time} to {@link java.util.Calendar}
* <li>{@link java.util.Date} to {@link java.sql.Timestamp}
* <li>{@link java.util.Date} to {@link java.sql.Date}
* <li>{@link java.util.Calendar} to {@link java.util.Date}
* <li>{@link java.util.Calendar} to {@link java.sql.Timestamp}
* <li>{@link XMLGregorianCalendar} to {@link Calendar}
* <li>{@link Calendar} to {@link XMLGregorianCalendar}
* <li>{@link XMLGregorianCalendar} to {@link Date}
* <li>{@link Date} to {@link XMLGregorianCalendar}
* </ul>
* </p>
* <p>
* Supported unsafe (lossy) conversions:
* <ul>
* <li>{@link java.util.Date} to {@link java.sql.Time}
* <li>{@link java.util.Calendar} to {@link java.sql.Time}
* <li>{@link java.sql.Timestamp} to {@link java.util.Calendar}
* </p>
* <p>
* The hint {@link ConverterFactory#SAFE_CONVERSION} is used to control which conversions will be
* applied.
* </p>
* <p>
* The hint {@link #DATE_FORMAT} can be used to control the format of converting a temporal value to
* a String.
* </p>
*
* @author Justin Deoliveira, The Open Planning Project
* @since 2.4
*
*
* @source $URL$
*/
public class TemporalConverterFactory implements ConverterFactory {
public Converter createConverter(Class source, Class target, Hints hints) {
boolean isSafeOnly = false;
if (hints != null){
Object safe = hints.get(ConverterFactory.SAFE_CONVERSION);
if (safe instanceof Boolean && ((Boolean)safe).booleanValue()){
isSafeOnly = true;
}
}
if (Date.class.isAssignableFrom(source)) {
// handle all of (java.util.Date,java.sql.Timestamp,and java.sql.Time) ->
// java.util.Calendar
if (Calendar.class.isAssignableFrom(target)) {
if (isSafeOnly && Timestamp.class.isAssignableFrom(source)){
//java.sql.Timestamp -> Calendar is not a safe conversion
return null;
}
return new Converter() {
public Object convert(Object source, Class target) throws Exception {
Calendar calendar = Calendar.getInstance();
calendar.setTime((Date) source);
return calendar;
}
};
}
// handle all of (java.util.Date) -> (java.sql.Timestamp,java.sql.Time)
if (Timestamp.class.isAssignableFrom(target) || Time.class.isAssignableFrom(target)
|| java.sql.Date.class.isAssignableFrom(target)) {
if ( isSafeOnly && Time.class.isAssignableFrom( target ) ) {
//not safe
return null;
}
return new Converter() {
public Object convert(Object source, Class target) throws Exception {
Date date = (Date) source;
return timeMillisToDate(date.getTime(), target);
}
};
}
if (XMLGregorianCalendar.class.isAssignableFrom(target)) {
return new Converter() {
public <T> T convert(Object source, Class<T> target) throws Exception {
Date date = (Date) source;
Calendar calendar = createConverter(Date.class, Calendar.class, null)
.convert(date, Calendar.class);
return (T) createConverter(Calendar.class, XMLGregorianCalendar.class, null)
.convert(calendar, XMLGregorianCalendar.class);
}
};
}
// if ( String.class.equals( target ) ) {
// final DateFormat fFormat;
// if ( dateFormat != null ) {
// fFormat = dateFormat;
// }
// else {
// //create a default
// fFormat = DateFormat.getDateInstance();
// }
//
// return new Converter() {
// public Object convert(Object source, Class target) throws Exception {
// return fFormat.format( (Date)source );
// }
// };
// }
}
// this should handle java.util.Calendar to
// (java.util.Date,java.sql.Timestamp,java.util.Time}
if (Calendar.class.isAssignableFrom(source)) {
if (Date.class.isAssignableFrom(target)) {
if (isSafeOnly && Time.class.isAssignableFrom( target )){
//Calendar -> Time is not saf
return null;
}
final Class fTarget = target;
return new Converter() {
public Object convert(Object source, Class target) throws Exception {
Calendar calendar = (Calendar) source;
return timeMillisToDate(calendar.getTimeInMillis(), target);
}
};
}
if (XMLGregorianCalendar.class.isAssignableFrom(target)) {
return new Converter() {
public <T> T convert(Object source, Class<T> target) throws Exception {
if (source instanceof GregorianCalendar) {
return (T) DatatypeFactory.newInstance().newXMLGregorianCalendar(
(GregorianCalendar) source);
}
return null;
}
};
}
// if ( String.class.equals( target ) ) {
// final DateFormat fFormat;
// if ( dateTimeFormat != null ) {
// fFormat = dateTimeFormat;
// }
// else {
// //create a default
// fFormat = DateFormat.getDateTimeInstance();
// }
//
// return new Converter() {
// public Object convert(Object source, Class target) throws Exception {
// Date date = ((Calendar)source).getTime();
// return fFormat.format( date );
// }
// };
// }
}
if (XMLGregorianCalendar.class.isAssignableFrom(source)) {
if (Calendar.class.isAssignableFrom(target)) {
return new Converter() {
public <T> T convert(Object source, Class<T> target) throws Exception {
XMLGregorianCalendar calendar = (XMLGregorianCalendar) source;
return (T) calendar.toGregorianCalendar();
}
};
}
if (Date.class.isAssignableFrom(target)) {
return new Converter() {
public <T> T convert(Object source, Class<T> target) throws Exception {
Calendar calendar = createConverter(XMLGregorianCalendar.class,
Calendar.class, null).convert(source, Calendar.class);
if (calendar != null) {
return (T) createConverter(Calendar.class, Date.class, null).convert(
calendar, Date.class);
}
return null;
}
};
}
}
return null;
}
/**
* Turns a timestamp specified in milliseconds into a date, making sure to shave off
* the un-necessary parts when building java.sql time related classes
* @param time
* @param target
* @return
*/
Date timeMillisToDate(long time, Class target) {
if(Timestamp.class.isAssignableFrom(target)) {
return new Timestamp(time);
} else if(java.sql.Date.class.isAssignableFrom(target)) {
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(time);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
return new java.sql.Date(cal.getTimeInMillis());
} else if(java.sql.Time.class.isAssignableFrom(target)) {
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(time);
cal.set(Calendar.YEAR, 0);
cal.set(Calendar.MONTH, 0);
cal.set(Calendar.DAY_OF_MONTH, 0);
return new java.sql.Time(cal.getTimeInMillis());
} else if(java.util.Date.class.isAssignableFrom(target)) {
return new java.util.Date(time);
} else {
throw new IllegalArgumentException("Unsupported target type " + target);
}
}
}