org.jdesktop.http.async.JsonHttpRequest.java Source code

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Here is the source code for org.jdesktop.http.async.JsonHttpRequest.java

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/*
 * $Id$
 *
 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

package org.jdesktop.http.async;

import org.jdesktop.http.Method;
import org.json.JSONArray;
import org.json.JSONObject;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 *
 * @author rbair
 */
public final class JsonHttpRequest extends AsyncHttpRequest {
    private JSONObject responseJSON;
    private Map<String, Object> responseMap;

    /** Creates a new instance of JsonHttpRequest */
    public JsonHttpRequest() {
    }

    //    public JSONObject getResponseJSON() {
    //        if (getReadyState() == ReadyState.LOADED) {
    //            return responseJSON;
    //        } else {
    //            return null;
    //        }
    //    }

    public Map<String, Object> getResponseMap() {
        if (getReadyState() == ReadyState.LOADED) {
            return responseMap;
        } else {
            return null;
        }
    }

    protected void reset() {
        setResponseJSON(null);
        setResponseMap(null);
        super.reset();
    }

    protected void handleResponse(String responseText) throws Exception {
        if (responseText == null) {
            setResponseJSON(null);
            setResponseMap(null);
        } else {
            try {
                setResponseJSON(new JSONObject(responseText));

                //convert the JSONObject to a map (easier for binding?)
                Map<String, Object> map = new HashMap<String, Object>();
                stuffIntoMap(responseJSON, map);
                setResponseMap(map);
            } catch (Exception e) {
                setResponseJSON(null);
                setResponseMap(null);
                throw e;
            }
        }
    }

    private void stuffIntoMap(JSONObject obj, Map<String, Object> map) {
        if (obj == null) {
            return;
        }

        Iterator itr = obj.keys();
        while (itr.hasNext()) {
            String key = (String) itr.next();
            Object value = obj.opt(key);

            if (value instanceof JSONArray) {
                JSONArray a = (JSONArray) value;
                Object[] array = new Object[a.length()];
                stuffIntoArray(a, array);
                map.put(key, array);
            } else if (value instanceof JSONObject) {
                Map<String, Object> submap = new HashMap<String, Object>();
                stuffIntoMap((JSONObject) value, submap);
                map.put(key, submap);
            } else {
                map.put(key, value);
            }
        }
    }

    private void stuffIntoArray(JSONArray a, Object[] array) {
        if (a == null) {
            return;
        }

        for (int i = 0; i < array.length; i++) {
            Object value = a.opt(i);

            if (value instanceof JSONObject) {
                JSONObject obj = (JSONObject) value;
                Map<String, Object> map = new HashMap<String, Object>();
                stuffIntoMap(obj, map);
                array[i] = map;
            } else if (value instanceof JSONArray) {
                JSONArray ja = (JSONArray) value;
                Object[] o = new Object[ja.length()];
                stuffIntoArray(ja, o);
                array[i] = o;
            } else {
                array[i] = value;
            }
        }
    }

    private void setResponseJSON(JSONObject obj) {
        JSONObject old = this.responseJSON;
        this.responseJSON = obj;
        firePropertyChange("responseJSON", old, this.responseJSON);
    }

    private void setResponseMap(Map<String, Object> obj) {
        Map<String, Object> old = this.responseMap;
        this.responseMap = obj;
        firePropertyChange("responseMap", old, this.responseMap);
    }

    public static void main(String[] args) {
        final JsonHttpRequest req = new JsonHttpRequest();
        req.addReadyStateChangeListener(new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent evt) {
                if (evt.getNewValue() == ReadyState.LOADED) {
                    //                    JSONObject json = req.getResponseJSON();
                    //                    json = json.optJSONObject("ResultSet");
                    //                    System.out.println("Total Results Avail.: " + json.optString("totalResultsAvailable"));
                    //                    System.out.println("Results: ");
                    //                    JSONArray results = json.optJSONArray("Result");
                    //                    for (int i=0; i<results.length(); i++) {
                    //                        System.out.println("\tTitle: " + results.optJSONObject(i).optString("Title"));
                    //                    }

                    Map map = (Map) req.getResponseMap().get("ResultSet");
                    System.out.println("Total Results Avail.: " + map.get("totalResultsAvailable"));
                    System.out.println("Results: ");
                    Object[] results2 = (Object[]) map.get("Result");
                    for (int i = 0; i < results2.length; i++) {
                        Map m = (Map) results2[i];
                        System.out.println("\tTitle: " + m.get("Title"));
                    }
                }
            }
        });
        try {
            req.open(Method.GET,
                    "http://api.search.yahoo.com/ImageSearchService/V1/imageSearch?appid=YahooDemo&query=JavaOne&output=json");
            req.send();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}