/*
* JSON-RPC-Java - a JSON-RPC to Java Bridge with dynamic invocation
*
* $Id: ListSerializer.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.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Vector;
public class ListSerializer extends AbstractSerializer
{
private static Class[] _serializableClasses = new Class[]
{ List.class, ArrayList.class, LinkedList.class, Vector.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) &&
List.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.List") ||
java_class.equals("java.util.AbstractList") ||
java_class.equals("java.util.LinkedList") ||
java_class.equals("java.util.ArrayList") ||
java_class.equals("java.util.Vector")))
throw new UnmarshallException("not a List");
JSONArray jsonlist = getList(jso);
int i = 0;
ObjectMatch m = new ObjectMatch(-1);
try {
for(; i < jsonlist.length(); i++)
m = ser.tryUnmarshall(state, null, jsonlist.get(i)).max(m);
} catch (JSONException e) {
throw new UnmarshallException
("element " + i + " " + e.getMessage());
} catch (UnmarshallException e) {
throw new UnmarshallException
("element " + i + " " + e.getMessage());
}
return m;
}
public Object unmarshall(SerializerState state, Class clazz, Object o)
throws UnmarshallException
{
JSONObject jso = (JSONObject)o;
String java_class = getJavaClass(jso);
AbstractList al = null;
if(java_class.equals("java.util.List") ||
java_class.equals("java.util.AbstractList") ||
java_class.equals("java.util.ArrayList")) {
al = new ArrayList();
} else if(java_class.equals("java.util.LinkedList")) {
al = new LinkedList();
} else if(java_class.equals("java.util.Vector")) {
al = new Vector();
} else {
throw new UnmarshallException("not a List");
}
JSONArray jsonlist = getList(jso);
int i = 0;
try {
for(; i < jsonlist.length(); i++)
al.add(ser.unmarshall(state, null, jsonlist.get(i)));
} catch (JSONException e) {
throw new UnmarshallException
("element " + i + " " + e.getMessage());
} catch (UnmarshallException e) {
throw new UnmarshallException
("element " + i + " " + e.getMessage());
}
return al;
}
public Object marshall(SerializerState state, Object o)
throws MarshallException
{
List list = (List)o;
JSONObject obj = new JSONObject();
JSONArray arr = new JSONArray();
try {
if (ser.getMarshallClassHints())
obj.put("javaClass", o.getClass().getName());
obj.put("list", arr);
} catch (JSONException e) {
throw new MarshallException("list metadata" + e.getMessage());
}
int index=0;
try {
Iterator i = list.iterator();
while(i.hasNext()) {
arr.put(ser.marshall(state, i.next()));
index++;
}
} catch (MarshallException e) {
throw new MarshallException
("element " + index + " " + 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 JSONArray getList(JSONObject jso) throws UnmarshallException {
try {
return jso.getJSONArray("list");
} catch (JSONException e) {
throw new UnmarshallException("list missing");
}
}
}