package er.ajax.json.serializer;
import org.jabsorb.serializer.AbstractSerializer;
import org.jabsorb.serializer.MarshallException;
import org.jabsorb.serializer.ObjectMatch;
import org.jabsorb.serializer.SerializerState;
import org.jabsorb.serializer.UnmarshallException;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.webobjects.foundation.NSData;
import com.webobjects.foundation.NSMutableData;
import com.webobjects.foundation.NSPropertyListSerialization;
/**
* Transforms NSData between JavaScript and Java.
*/
public class NSDataSerializer extends AbstractSerializer {
/**
* Do I need to update serialVersionUID?
* See section 5.6 <cite>Type Changes Affecting Serialization</cite> on page 51 of the
* <a href="http://java.sun.com/j2se/1.4/pdf/serial-spec.pdf">Java Object Serialization Spec</a>
*/
private static final long serialVersionUID = 1L;
private static Class[] _serializableClasses = new Class[] { NSData.class, NSMutableData.class };
private static Class[] _JSONClasses = new Class[] { JSONObject.class };
public Class[] getSerializableClasses() {
return _serializableClasses;
}
public Class[] getJSONClasses() {
return _JSONClasses;
}
@Override
public boolean canSerialize(Class clazz, Class jsonClazz) {
return (super.canSerialize(clazz, jsonClazz) || ((jsonClazz == null || jsonClazz == JSONArray.class) && NSData.class.isAssignableFrom(clazz)));
}
public ObjectMatch tryUnmarshall(SerializerState state, Class clazz, Object o) throws UnmarshallException {
try {
JSONObject jso = (JSONObject) o;
String java_class = jso.getString("javaClass");
if (java_class == null) {
throw new UnmarshallException("no type hint");
}
String string = jso.getString("bytes");
NSData data = (NSData) NSPropertyListSerialization.propertyListFromString(string);
if (NSData.class.isAssignableFrom(clazz)) {
return ObjectMatch.OKAY;
}
throw new UnmarshallException("invalid class " + clazz);
}
catch (JSONException e) {
throw new UnmarshallException("Failed to unmarshall NSData.", e);
}
}
public Object unmarshall(SerializerState state, Class clazz, Object o) throws UnmarshallException {
try {
JSONObject jso = (JSONObject) o;
String java_class = jso.getString("javaClass");
if (java_class == null) {
throw new UnmarshallException("no type hint");
}
String string = jso.getString("bytes");
NSData data = (NSData) NSPropertyListSerialization.propertyListFromString(string);
if (NSMutableData.class.equals(clazz)) {
NSMutableData mutableData = new NSMutableData(data);
state.setSerialized(o, mutableData);
return mutableData;
}
else if (NSData.class.equals(clazz)) {
state.setSerialized(o, data);
return data;
}
throw new UnmarshallException("invalid class " + clazz);
}
catch (JSONException e) {
throw new UnmarshallException("Failed to unmarshall NSData.", e);
}
}
public Object marshall(SerializerState state, Object p, Object o) throws MarshallException {
try {
String bytes;
if (o instanceof NSData) {
bytes = NSPropertyListSerialization.stringFromPropertyList(o);
}
else {
throw new MarshallException("cannot marshall date using class " + o.getClass());
}
JSONObject obj = new JSONObject();
if (ser.getMarshallClassHints()) {
obj.put("javaClass", o.getClass().getName());
}
obj.put("bytes", bytes);
return obj;
}
catch (JSONException e) {
throw new MarshallException("Failed to marshall NSData.", e);
}
}
}