Implemented Air Pollution retrieving.

src/main/java/com/github/prominence/openweathermap/api/AirPollutionRequester.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2018 Alexey Zinchenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+package com.github.prominence.openweathermap.api;
+
+import com.github.prominence.openweathermap.api.constants.TimeFrame;
+import com.github.prominence.openweathermap.api.exception.DataNotFoundException;
+import com.github.prominence.openweathermap.api.exception.InvalidAuthTokenException;
+import com.github.prominence.openweathermap.api.model.Coordinates;
+import com.github.prominence.openweathermap.api.model.response.AirPollution;
+import com.github.prominence.openweathermap.api.utils.JSONUtils;
+import com.github.prominence.openweathermap.api.utils.RequestUtils;
+import com.github.prominence.openweathermap.api.utils.TimeFrameUtils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.Date;
+
+public class AirPollutionRequester extends AuthenticationTokenBasedRequester {
+
+    private Coordinates coordinates;
+    private TimeFrame timeFrame;
+    private Date date;
+
+    AirPollutionRequester(String authToken) {
+        super(authToken);
+    }
+
+    public AirPollutionRequester setCoordinates(Coordinates coordinates) {
+        this.coordinates = coordinates;
+        return this;
+    }
+
+    public AirPollutionRequester setCoordinates(float latitude, float longitude) {
+        this.coordinates = new Coordinates(latitude, longitude);
+        return this;
+    }
+
+    public AirPollutionRequester setTimeFrame(TimeFrame timeFrame) {
+        this.timeFrame = timeFrame;
+        return this;
+    }
+
+    public AirPollutionRequester setDate(Date date) {
+        this.date = date;
+        return this;
+    }
+
+    public AirPollution retrieve() throws InvalidAuthTokenException, DataNotFoundException {
+        if (coordinates == null || timeFrame == null || date == null) {
+            throw new IllegalArgumentException("You must execute 'setCoordinates', 'setTimeFrame' and 'setDate' and least once.");
+        }
+
+        String requestParameters = String.format("%s,%s/%s.json", coordinates.getLatitude(), coordinates.getLongitude(), TimeFrameUtils.formatDate(date, timeFrame));
+
+        AirPollution airPollution = null;
+
+        try (InputStream response = executeRequest("pollution/v1/co/", requestParameters)) {
+            airPollution = (AirPollution) JSONUtils.parseJSON(response, AirPollution.class);
+        } catch (IOException ex) {
+            ex.printStackTrace();
+        }
+
+        return airPollution;
+    }
+
+    private InputStream executeRequest(String requestType, String requestSpecificParameters) throws MalformedURLException, InvalidAuthTokenException, DataNotFoundException {
+
+        String url = OPEN_WEATHER_BASE_URL + requestType +
+                requestSpecificParameters +
+                "?appid=" +
+                authToken;
+        return RequestUtils.executeGetRequest(new URL(url));
+    }
+
+}