ca.etsmtl.applets.etsmobile.api.SignetBackgroundThread.java Source code

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Here is the source code for ca.etsmtl.applets.etsmobile.api.SignetBackgroundThread.java

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/*******************************************************************************
 * Copyright 2013 Club ApplETS
 * 
 * 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 ca.etsmtl.applets.etsmobile.api;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;

import org.apache.commons.io.IOUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.google.gson.Gson;

/**
 * Use this class to make async JSON GET/POST to signETS
 * 
 * @author Vincent Seguin, Philipp David, Micheal Bernier
 * 
 * @param <T>
 *            Type
 * @param <E>
 *            Entity
 */
public class SignetBackgroundThread<T, E> {
    public enum FetchType {
        ARRAY, OBJECT
    }

    private final String urlStr;
    private final String action;
    private final Object bodyParams;
    private final Class<E> typeOfClass;

    private final String liste;

    public SignetBackgroundThread(final String urlStr, final String action, final Object bodyParams,
            final Class<E> typeOfClass) {
        this.urlStr = urlStr;
        this.action = action;
        this.bodyParams = bodyParams;
        this.typeOfClass = typeOfClass;
        this.liste = "liste";
    }

    public SignetBackgroundThread(final String urlStr, final String action, final Object bodyParams,
            final Class<E> typeOfClass, final String liste) {
        this.urlStr = urlStr;
        this.action = action;
        this.bodyParams = bodyParams;
        this.typeOfClass = typeOfClass;
        this.liste = liste;
    }

    @SuppressWarnings("unchecked")
    public T fetchArray() {
        ArrayList<E> array = new ArrayList<E>();

        try {
            final StringBuilder sb = new StringBuilder();
            sb.append(urlStr);
            sb.append("/");
            sb.append(action);

            final Gson gson = new Gson();
            final String bodyParamsString = gson.toJson(bodyParams);

            final URL url = new URL(sb.toString());
            final URLConnection conn = url.openConnection();
            conn.addRequestProperty("Content-Type", "application/json");
            conn.addRequestProperty("charset", "utf-8");

            conn.setDoOutput(true);
            final OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
            wr.write(bodyParamsString);
            wr.flush();

            final StringWriter writer = new StringWriter();
            final InputStream in = conn.getInputStream();
            IOUtils.copy(in, writer);
            in.close();
            wr.close();

            final String jsonString = writer.toString();

            final ArrayList<E> objectList = new ArrayList<E>();

            JSONObject jsonObject;
            jsonObject = new JSONObject(jsonString);

            JSONArray jsonRootArray;
            jsonRootArray = jsonObject.getJSONObject("d").getJSONArray(liste);
            android.util.Log.d("JSON", jsonRootArray.toString());
            for (int i = 0; i < jsonRootArray.length(); i++) {
                objectList.add(gson.fromJson(jsonRootArray.getJSONObject(i).toString(), typeOfClass));
            }

            array = objectList;
        } catch (final IOException e) {
            e.printStackTrace();
        } catch (final JSONException e) {
            e.printStackTrace();
        }

        return (T) array;
    }

    @SuppressWarnings("unchecked")
    public T fetchObject() {
        T object = null;

        try {
            final StringBuilder sb = new StringBuilder();
            sb.append(urlStr);
            sb.append("/");
            sb.append(action);

            final Gson gson = new Gson();
            final String bodyParamsString = gson.toJson(bodyParams);

            final URL url = new URL(sb.toString());
            final URLConnection conn = url.openConnection();
            conn.addRequestProperty("Content-Type", "application/json; charset=UTF-8");

            conn.setDoOutput(true);
            final OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
            wr.write(bodyParamsString);
            wr.flush();

            final StringWriter writer = new StringWriter();
            final InputStream in = conn.getInputStream();
            IOUtils.copy(in, writer);
            in.close();
            wr.close();

            final String jsonString = writer.toString();

            JSONObject jsonObject;
            jsonObject = new JSONObject(jsonString);

            JSONObject jsonRootArray;
            jsonRootArray = jsonObject.getJSONObject("d");
            object = (T) gson.fromJson(jsonRootArray.toString(), typeOfClass);
            android.util.Log.d("JSON", jsonRootArray.toString());
        } catch (final MalformedURLException e) {
            e.printStackTrace();
        } catch (final IOException e) {
            e.printStackTrace();
        } catch (final JSONException e) {
            e.printStackTrace();
        }
        return object;
    }
}