/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2011 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.dojo.server.json;
import com.metaparadigm.jsonrpc.AbstractSerializer;
import com.metaparadigm.jsonrpc.MarshallException;
import com.metaparadigm.jsonrpc.ObjectMatch;
import com.metaparadigm.jsonrpc.SerializerState;
import com.metaparadigm.jsonrpc.UnmarshallException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* Json serializer for BigDecimal and BigInteger objects.
*
* @author Pieter De Graef
*/
public class BigNumberSerializer extends AbstractSerializer {
private final Logger log = LoggerFactory.getLogger(GeometrySerializer.class);
private static final long serialVersionUID = -1265127912351766084L;
private static Class[] SERIALIZABLE_CLASSES = new Class[] {BigDecimal.class, BigInteger.class};
private static Class[] JSON_CLASSES = new Class[] {JSONObject.class};
public Class[] getSerializableClasses() {
return SERIALIZABLE_CLASSES;
}
public Class[] getJSONClasses() {
return JSON_CLASSES;
}
public ObjectMatch tryUnmarshall(SerializerState state, Class clazz, Object jso)
throws UnmarshallException {
try {
toBigNumber(clazz, jso);
} catch (NumberFormatException e) {
throw new UnmarshallException("not a number");
}
return ObjectMatch.OKAY;
}
public Object unmarshall(SerializerState state, Class clazz, Object jso) throws UnmarshallException {
try {
if (jso == null || "".equals(jso)) {
return null;
}
return toBigNumber(clazz, jso);
} catch (NumberFormatException nfe) {
throw new UnmarshallException("cannot convert object " + jso + " to type " + clazz.getName());
}
}
public Object marshall(SerializerState state, Object o) throws MarshallException {
log.debug("\nMarshalling object in the BigNumberSerializer\n");
if (o instanceof BigInteger) {
return ((BigInteger) o).longValue();
} else if (o instanceof BigDecimal) {
return ((BigDecimal) o).doubleValue();
}
return null;
}
private Object toBigNumber(Class clazz, Object jso) throws NumberFormatException {
if (clazz == BigInteger.class) {
if (jso instanceof String) {
return new BigInteger((String) jso);
} else {
long l = ((Number) jso).longValue();
return new BigInteger(Long.toString(l));
}
} else if (clazz == BigDecimal.class) {
if (jso instanceof String) {
return new BigDecimal((String) jso);
} else {
double l = ((Number) jso).doubleValue();
return new BigDecimal(Double.toString(l));
}
}
return null;
}
}