/*
* JSON-RPC-Java - a JSON-RPC to Java Bridge with dynamic invocation
*
* $Id: SetSerializer.java,v 1.5 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.AbstractSet;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.TreeSet;
public class SetSerializer extends AbstractSerializer
{
private static Class[] _serializableClasses = new Class[]
{ Set.class, HashSet.class, TreeSet.class, LinkedHashSet.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) &&
Set.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 == null)
throw new UnmarshallException("no type hint");
if(!(java_class.equals("java.util.Set") ||
java_class.equals("java.util.AbstractSet") ||
java_class.equals("java.util.LinkedHashSet") ||
java_class.equals("java.util.TreeSet") ||
java_class.equals("java.util.HashSet")))
throw new UnmarshallException("not a Set");
JSONObject jsonset = getSet(jso);
if(jsonset == null)
throw new UnmarshallException("set missing");
ObjectMatch m = new ObjectMatch(-1);
Iterator i = jsonset.keys();
String key = null;
try {
while(i.hasNext()) {
key = (String)i.next();
m = ser.tryUnmarshall(state, null, jsonset.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);
if(java_class == null)
throw new UnmarshallException("no type hint");
AbstractSet abset = null;
if(java_class.equals("java.util.Set") ||
java_class.equals("java.util.AbstractSet") ||
java_class.equals("java.util.HashSet")) {
abset = new HashSet();
} else if(java_class.equals("java.util.TreeSet")) {
abset = new TreeSet();
} else if(java_class.equals("java.util.LinkedHashSet")) {
abset = new LinkedHashSet();
} else {
throw new UnmarshallException("not a Set");
}
JSONObject jsonset = getSet(jso);
if(jsonset == null)
throw new UnmarshallException("set missing");
Iterator i = jsonset.keys();
String key = null;
try {
while(i.hasNext()) {
key = (String)i.next();
Object setElement = jsonset.get(key);
abset.add(ser.unmarshall(state, null, setElement));
}
} catch (JSONException e) {
throw new UnmarshallException("key " + i + e.getMessage());
} catch (UnmarshallException e) {
throw new UnmarshallException("key " + i + e.getMessage());
}
return abset;
}
public Object marshall(SerializerState state, Object o)
throws MarshallException
{
Set set = (Set)o;
JSONObject obj = new JSONObject();
JSONObject setdata = new JSONObject();
try {
if (ser.getMarshallClassHints())
obj.put("javaClass", o.getClass().getName());
obj.put("set", setdata);
} catch (JSONException e) {
throw new MarshallException("set meta data: " + e.getMessage());
}
Object key = null;
Iterator i = set.iterator();
try {
while(i.hasNext()) {
key = i.next();
// only support String keys
setdata.put(key.toString(), ser.marshall(state, key));
}
}catch (JSONException e) {
throw new MarshallException("set key " + key + e.getMessage());
}catch (MarshallException e) {
throw new MarshallException("set 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 getSet(JSONObject jso) throws UnmarshallException {
try {
return jso.getJSONObject("set");
} catch (JSONException e) {
throw new UnmarshallException("set missing");
}
}
}