SalesforceCRMAdapterAccess.java

/* “Copyright 2012 Megam Systems”
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.megam.deccanplato.provider.salesforce.crm;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.message.BasicNameValuePair;
import org.megam.deccanplato.http.TransportMachinery;
import org.megam.deccanplato.http.TransportResponse;
import org.megam.deccanplato.http.TransportTools;
import org.megam.deccanplato.provider.core.AdapterAccess;
import org.megam.deccanplato.provider.core.AdapterAccessException;
import org.megam.deccanplato.provider.core.DataMap;
import org.megam.deccanplato.provider.core.DefaultDataMap;

import com.amazonaws.util.json.JSONException;
import com.amazonaws.util.json.JSONObject;
import com.google.gson.Gson;

import static org.megam.deccanplato.provider.salesforce.crm.Constants.*;

public class SalesforceCRMAdapterAccess implements AdapterAccess {

	private boolean success = false;

	private static final String SALESFORCE_OAUTH2_URL = "https://login.salesforce.com/services/oauth2/token";

	public SalesforceCRMAdapterAccess() {
		super();
	}

	@Override
	public boolean isSuccessful() {
		return success;
	}

	@Override
	public <T extends Object> DataMap<T> authenticate(DataMap<T> access)
			throws AdapterAccessException {
		Map<String, T> accessMap = access.map();

		List<NameValuePair> list = new ArrayList<NameValuePair>();
		list.add(new BasicNameValuePair(S_GRANT_TYPE, S_PASSWORD));
		list.add(new BasicNameValuePair(S_CLIENT_ID, (String) accessMap
				.get(CLIENT_ID)));
		list.add(new BasicNameValuePair(S_CLIENT_SECRET, (String) accessMap
				.get(CLIENT_SECRET)));
		list.add(new BasicNameValuePair(S_USER_NAME, (String) accessMap
				.get(ACCESS_USER_NAME)));
		list.add(new BasicNameValuePair(S_PASSWORD, (String) accessMap
				.get(ACCESS_PASSWORD)));

		TransportTools tools = new TransportTools(SALESFORCE_OAUTH2_URL, list);		
		String responseBody = null;

		TransportResponse response = null;
		try {
			response = TransportMachinery.post(tools);			
			responseBody = response.entityToString();			
		} catch (ClientProtocolException ce) {
			throw new AdapterAccessException(
					"An error occurred during post operation.", ce);
		} catch (IOException ioe) {
			throw new AdapterAccessException(
					"An error occurred during post operation.", ioe);
		}

		return parseOutput(responseBody);
	}

	public <T> DataMap<T> parseOutput(String response)
			throws AdapterAccessException {
		DataMap<T> respMap = new DefaultDataMap<T>();
		JSONObject json;
		try {
			json = new JSONObject(response);
			respMap.map().put(ACCESS_TOKEN, (T) json.get(ACCESS_TOKEN));
			respMap.map().put(INSTANCE_URL, (T) json.get(INSTANCE_URL));
			System.out.println("Access_token--"+json.get(ACCESS_TOKEN));
			System.out.println("Access_token--"+json.get(INSTANCE_URL));
			success = true;
		} catch (JSONException e) {
			throw new AdapterAccessException(
					"Failed to parse JSON received from the post operation.", e);
		}

		return respMap;
	}

}