com.metaparadigm.jsonrpc.ListSerializer.java Source code

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

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/*
 * JSON-RPC-Java - a JSON-RPC to Java Bridge with dynamic invocation
 *
 * $Id: ListSerializer.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.List;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.Vector;
import java.util.Iterator;

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

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

    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;
    }

    @Override
    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 = 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.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 = null;
        try {
            jsonlist = jso.getJSONArray("list");
        } catch (JSONException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        if (jsonlist == null)
            throw new UnmarshallException("list missing");
        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 (UnmarshallException e) {
            throw new UnmarshallException("element " + i + " " + 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");
        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 = null;
        try {
            jsonlist = jso.getJSONArray("list");
        } catch (JSONException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        if (jsonlist == null)
            throw new UnmarshallException("list missing");
        int i = 0;
        try {
            for (; i < jsonlist.length(); i++)
                al.add(ser.unmarshall(state, null, jsonlist.get(i)));
        } catch (UnmarshallException e) {
            throw new UnmarshallException("element " + i + " " + e.getMessage());
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return al;
    }

    public Object marshall(SerializerState state, Object o) throws MarshallException {
        List list = (List) o;
        JSONObject obj = new JSONObject();
        JSONArray arr = new JSONArray();
        if (ser.getMarshallClassHints())
            try {
                obj.put("javaClass", o.getClass().getName());
            } catch (JSONException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
        try {
            obj.put("list", arr);
        } catch (JSONException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        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;
    }

}