/*
* JSON-RPC-Java - a JSON-RPC to Java Bridge with dynamic invocation
*
* $Id: MapSerializer.java,v 1.4 2005/06/16 23:26:14 mclark Exp $
*
* Copyright Metaparadigm Pte. Ltd. 2004.
* Michael Clark <michael@metaparadigm.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public (LGPL)
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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: http://www.gnu.org/
*
*/
package com.metaparadigm.jsonrpc;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.AbstractMap;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.TreeMap;
public class MapSerializer extends AbstractSerializer
{
private static Class[] _serializableClasses = new Class[]
{ Map.class, HashMap.class, TreeMap.class, LinkedHashMap.class };
private static Class[] _JSONClasses = new Class[]
{ JSONObject.class };
public Class[] getSerializableClasses() { return _serializableClasses; }
public Class[] getJSONClasses() { return _JSONClasses; }
public boolean canSerialize(Class clazz, Class jsonClazz)
{
return (super.canSerialize(clazz, jsonClazz) ||
((jsonClazz == null || jsonClazz == JSONObject.class) &&
Map.class.isAssignableFrom(clazz)));
}
public ObjectMatch tryUnmarshall(SerializerState state,
Class clazz, Object o)
throws UnmarshallException
{
JSONObject jso = (JSONObject)o;
String java_class = getJavaClass(jso);
if(!(java_class.equals("java.util.Map") ||
java_class.equals("java.util.AbstractMap") ||
java_class.equals("java.util.LinkedHashMap") ||
java_class.equals("java.util.TreeMap") ||
java_class.equals("java.util.HashMap")))
throw new UnmarshallException("not a Map");
JSONObject jsonmap = getMap(jso);
ObjectMatch m = new ObjectMatch(-1);
Iterator i = jsonmap.keys();
String key = null;
try {
while(i.hasNext()) {
key = (String)i.next();
m = ser.tryUnmarshall(state, null, jsonmap.get(key)).max(m);
}
} catch (JSONException e) {
throw new UnmarshallException("key " + key + " " + e.getMessage());
} catch (UnmarshallException e) {
throw new UnmarshallException
("key " + key + " " + e.getMessage());
}
return m;
}
public Object unmarshall(SerializerState state, Class clazz, Object o)
throws UnmarshallException
{
JSONObject jso = (JSONObject)o;
String java_class = getJavaClass(jso);
AbstractMap abmap = null;
if(java_class.equals("java.util.Map") ||
java_class.equals("java.util.AbstractMap") ||
java_class.equals("java.util.HashMap")) {
abmap = new HashMap();
} else if(java_class.equals("java.util.TreeMap")) {
abmap = new TreeMap();
} else if(java_class.equals("java.util.LinkedHashMap")) {
abmap = new LinkedHashMap();
} else {
throw new UnmarshallException("not a Map");
}
JSONObject jsonmap = getMap(jso);
Iterator i = jsonmap.keys();
String key = null;
try {
while(i.hasNext()) {
key = (String)i.next();
abmap.put(key, ser.unmarshall(state, null, jsonmap.get(key)));
}
} catch (JSONException e) {
throw new UnmarshallException("key " + key + " " + e.getMessage());
} catch (UnmarshallException e) {
throw new UnmarshallException
("key " + key + " " + e.getMessage());
}
return abmap;
}
public Object marshall(SerializerState state, Object o)
throws MarshallException
{
Map map = (Map)o;
JSONObject obj = new JSONObject();
JSONObject mapdata = new JSONObject();
try {
if (ser.getMarshallClassHints())
obj.put("javaClass", o.getClass().getName());
obj.put("map", mapdata);
}
catch (JSONException e) {
throw new MarshallException("map metadata: " + e.getMessage());
}
Object key = null;
Object val = null;
try {
Iterator i = map.entrySet().iterator();
while(i.hasNext()) {
Map.Entry ent = (Map.Entry)i.next();
key = ent.getKey();
val = ent.getValue();
// only support String keys
mapdata.put(key.toString(), ser.marshall(state, val));
}
} catch (JSONException e) {
throw new MarshallException
("map key " + key + " " + e.getMessage());
} catch (MarshallException e) {
throw new MarshallException
("map key " + key + " " + e.getMessage());
}
return obj;
}
private String getJavaClass(JSONObject jso) throws UnmarshallException {
try {
return jso.getString("javaClass");
} catch (JSONException e) {
throw new UnmarshallException("no type hint");
}
}
private JSONObject getMap(JSONObject jso) throws UnmarshallException {
try {
return jso.getJSONObject("map");
} catch (JSONException e) {
throw new UnmarshallException("map missing");
}
}
}