com.metaparadigm.jsonrpc.MapSerializer.java Source code

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Here is the source code for com.metaparadigm.jsonrpc.MapSerializer.java

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/*
 * JSON-RPC-Java - a JSON-RPC to Java Bridge with dynamic invocation
 *
 * $Id: MapSerializer.java,v 1.4.2.2 2006/03/06 12:39:21 mclark Exp $
 *
 * Copyright Metaparadigm Pte. Ltd. 2004.
 * Michael Clark <michael@metaparadigm.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.metaparadigm.jsonrpc;

import java.util.Map;
import java.util.AbstractMap;
import java.util.HashMap;
import java.util.TreeMap;
import java.util.LinkedHashMap;
import java.util.Iterator;

import org.json.JSONException;
import org.json.JSONObject;

public class MapSerializer extends AbstractSerializer {
    private final static long serialVersionUID = 1;

    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;
    }

    @Override
    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 = null;
        try {
            java_class = jso.getString("javaClass");
        } catch (JSONException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        if (java_class == null)
            throw new UnmarshallException("no type hint");
        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 = null;
        try {
            jsonmap = jso.getJSONObject("map");
        } catch (JSONException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        if (jsonmap == null)
            throw new UnmarshallException("map missing");
        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 (UnmarshallException e) {
            throw new UnmarshallException("key " + key + " " + e.getMessage());
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return m;
    }

    public Object unmarshall(SerializerState state, Class clazz, Object o) throws UnmarshallException {
        JSONObject jso = (JSONObject) o;
        String java_class = null;
        try {
            java_class = jso.getString("javaClass");
        } catch (JSONException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        if (java_class == null)
            throw new UnmarshallException("no type hint");
        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 = null;
        try {
            jsonmap = jso.getJSONObject("map");
        } catch (JSONException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        if (jsonmap == null)
            throw new UnmarshallException("map missing");
        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 (UnmarshallException e) {
            throw new UnmarshallException("key " + key + " " + e.getMessage());
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return abmap;
    }

    public Object marshall(SerializerState state, Object o) throws MarshallException {
        Map map = (Map) o;
        JSONObject obj = new JSONObject();
        JSONObject mapdata = new JSONObject();
        if (ser.getMarshallClassHints())
            try {
                obj.put("javaClass", o.getClass().getName());
            } catch (JSONException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
        try {
            obj.put("map", mapdata);
        } catch (JSONException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        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 (MarshallException e) {
            throw new MarshallException("map key " + key + " " + e.getMessage());
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return obj;
    }

}