com.emobtech.facebook.api.graph.Friends.java Source code

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Here is the source code for com.emobtech.facebook.api.graph.Friends.java

Source

/*
 * Friends.java
 * 24/05/2011
 * Facebook API Micro Edition
 * Copyright(c) Ernandes Mourao Junior (ernandes@gmail.com)
 * All rights reserved
 * GNU General Public License (GPL) Version 2, June 1991
 */
package com.emobtech.facebook.api.graph;

import java.io.IOException;
import java.util.Enumeration;
import java.util.Hashtable;

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

import com.emobtech.facebook.api.Request;
import com.twitterapime.io.HttpRequest;

/**
 * <p>
 * This class defines a request that retrieves the friends list.
 * </p>
 * @author Ernandes Mourao Junior (ernandes@gmail.com)
 * @version 1.0
 * @since 1.0
 */
public final class Friends implements Request {
    /**
     * <p>
     * Parses the JSON content.
     * </p>
     * @param json Content;
     * @return Array of data.
     * @throws JSONException If any error occurs during parsing. 
     */
    private static Hashtable[] parseJSON(String json) throws JSONException {
        JSONObject jo = new JSONObject(json);
        JSONArray ja = jo.getJSONArray("data");
        Hashtable[] fa = new Hashtable[ja.length()];
        //
        for (int i = 0; i < fa.length; i++) {
            jo = (JSONObject) ja.get(i);
            Hashtable fo = new Hashtable(2);
            //
            fo.put("id", jo.get("id"));
            fo.put("name", jo.get("name"));
            //
            fa[i] = fo;
        }
        //
        return fa;
    }

    /**
     * <p>
     * Create an instance of Friends class.
     * </p>
     */
    public Friends() {
    }

    /**
     * @see com.emobtech.facebook.api.Request#process(java.lang.String)
     */
    public com.emobtech.facebook.api.Response process(String accessToken) throws IOException {
        final String url = "https://graph.facebook.com/me/friends?access_token=" + accessToken;
        //
        HttpRequest req = new HttpRequest(url);
        //
        try {
            String json = req.send().getBodyContent();
            //
            return new Response(parseJSON(json));
        } catch (JSONException e) {
            throw new IOException(e.getMessage());
        } finally {
            req.close();
        }
    }

    /**
     * <p>
     * Friends's response class.
     * </p>
     * @author Ernandes Mourao Junior (ernandes@gmail.com)
     * @version 1.0
     * @since 1.0
     */
    public static class Response implements com.emobtech.facebook.api.Response, Enumeration {
        /**
         * <p>
         * Index.
         * </p>
         */
        private int index;

        /**
         * <p>
         * Friends data.
         * </p>
         */
        private Hashtable[] friendsData;

        /**
         * <p>
         * Create an instance of Result class.
         * </p>
         * @param friendsData Friends data.
         */
        Response(Hashtable[] friendsData) {
            index = -1;
            this.friendsData = friendsData;
        }

        /**
         * <p>
         * Return friend's Id.
         * </p>
         * @return Id.
         */
        public String getId() {
            return (String) friendsData[index].get("id");
        }

        /**
         * <p>
         * Return friend's name.
         * </p>
         * @return Name.
         */
        public String getName() {
            return (String) friendsData[index].get("name");
        }

        /**
         * @see java.util.Enumeration#hasMoreElements()
         */
        public boolean hasMoreElements() {
            return index + 1 < friendsData.length;
        }

        /**
         * @see java.util.Enumeration#nextElement()
         */
        public Object nextElement() {
            index++;
            return this;
        }
    }
}