CloudantCredentials.java

package net.wasdev.twelvefactorapp;

import java.io.StringReader;

import javax.json.Json;
import javax.json.JsonArray;
import javax.json.JsonObject;
import javax.json.JsonString;

public class CloudantCredentials {

	private String username;
	private String password;
	private String url;

	public CloudantCredentials(String username, String password, String url, String vcapServices) throws Exception {
		if (username != null && password != null && url != null) {
			this.url = url;
			this.username = username;
			this.password = password;
		} else {
			parseVcapServices(vcapServices);
			if (this.username == null || this.password == null || this.url == null) {
				throw new Exception(
						"Database cannot be accessed at this time, something is null. Passed in variables were "
						+ "username=" + username
						+ ", password=" + ((password == null) ? "null" : "(non-null password)")
						+ ", url=" + url + ". VCAP_SERVICES values were parsed out as "
								+ "username=" + this.username
								+ ", password=" + ((this.password == null) ? "null" : "(non null password)")
								+ ", url=" + this.url);
			}
		}
	}

	private void parseVcapServices(String vcapServicesEnv) {
	        if (vcapServicesEnv == null) {
	            return;
	        }
		JsonObject vcapServices = Json.createReader(new StringReader(vcapServicesEnv)).readObject();
		JsonArray cloudantObjectArray = vcapServices.getJsonArray("cloudantNoSQLDB");
		JsonObject cloudantObject = cloudantObjectArray.getJsonObject(0);
		JsonObject cloudantCredentials = cloudantObject.getJsonObject("credentials");
		JsonString cloudantUsername = cloudantCredentials.getJsonString("username");
		username = cloudantUsername.getString();
		JsonString cloudantPassword = cloudantCredentials.getJsonString("password");
		password = cloudantPassword.getString();
		JsonString cloudantUrl = cloudantCredentials.getJsonString("url");
		url = cloudantUrl.getString();
	}

	public String getUrl() {
		return url;
	}

	public String getPassword() {
		return password;
	}

	public String getUsername() {
		return username;
	}

}