#37 Added eBay data src, updated context + tests

src/main/java/de/rwu/easydrop/api/client/AbstractDataSource.java

@@ -8,6 +8,7 @@ import java.net.MalformedURLException;
 import java.net.URL;
 
 import de.rwu.easydrop.api.dto.ProductDTO;
+import de.rwu.easydrop.exception.DataSourceException;
 import de.rwu.easydrop.util.FormattingUtil;
 
 /**
@@ -38,7 +39,7 @@ public abstract class AbstractDataSource implements DataSource {
      * @param json    Product data
      * @return Finished ProductDTO
      */
-    public abstract ProductDTO buildProductDTO(ProductDTO product, String json);
+    protected abstract ProductDTO buildProductDTO(ProductDTO product, String json);
 
     /**
      * Overridable standard implementation.
@@ -64,7 +65,7 @@ public abstract class AbstractDataSource implements DataSource {
             if (responseCode == HttpURLConnection.HTTP_OK) {
                 reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
             } else {
-                throw new IllegalArgumentException(
+                throw new DataSourceException(
                         "Nothing found: "
                                 + dataOrigin
                                 + " API responded with error code "
@@ -79,7 +80,7 @@ public abstract class AbstractDataSource implements DataSource {
 
             buildProductDTO(product, response.toString());
         } catch (IOException e) {
-            throw new IllegalArgumentException(
+            throw new DataSourceException(
                     "Couldn't fulfill "
                             + dataOrigin
                             + " API request");

src/main/java/de/rwu/easydrop/api/client/AmazonProductDataSource.java

@@ -48,7 +48,7 @@ public final class AmazonProductDataSource extends AbstractDataSource {
     }
 
     @Override
-    public ProductDTO buildProductDTO(final ProductDTO product, final String json) {
+    protected ProductDTO buildProductDTO(final ProductDTO product, final String json) {
         String root = "$.featuredOffer.";
         ReadContext ctx = JsonPath.parse(json);
 
@@ -71,7 +71,7 @@ public final class AmazonProductDataSource extends AbstractDataSource {
      * @param productId ASIN
      */
     @Override
-    public URL createApiUrl(final String productId) throws MalformedURLException {
+    protected URL createApiUrl(final String productId) throws MalformedURLException {
         return new URL(baseUrl
                 + "/products/2020-08-26/products/"
                 + productId

src/main/java/de/rwu/easydrop/api/client/DataSourceFactory.java

@@ -0,0 +1,55 @@
+package de.rwu.easydrop.api.client;
+
+import javax.naming.ConfigurationException;
+
+import de.rwu.easydrop.util.Config;
+
+/**
+ * Factory for Data Sources.
+ *
+ * @since 0.2.0
+ */
+public class DataSourceFactory {
+
+    /**
+     * The data source config.
+     */
+    private Config config;
+
+    /**
+     * @param newConfig the config to set
+     */
+    public void setConfig(final Config newConfig) throws ConfigurationException {
+        this.config = newConfig;
+        this.config.loadConfig();
+    }
+
+    /**
+     * @param newConfig
+     */
+    public DataSourceFactory(final Config newConfig) throws ConfigurationException {
+        this.setConfig(newConfig);
+    }
+
+    /**
+     * Creates an Amazon Product Data Source.
+     *
+     * @return AmazonProductDataSource
+     */
+    public AmazonProductDataSource createAmazonProductDataSource() {
+        String apiUrl = config.getProperty("AMAZON_API_URL");
+        String apiKey = config.getProperty("AMAZON_API_KEY");
+        return new AmazonProductDataSource(apiUrl, apiKey);
+    }
+
+    /**
+     * Creates an eBay Item Data Source.
+     *
+     * @return EbayItemDataSource
+     */
+    public EbayItemDataSource createEbayItemDataSource() {
+        String apiUrl = config.getProperty("EBAY_API_URL");
+        String apiKey = config.getProperty("EBAY_API_KEY");
+        return new EbayItemDataSource(apiUrl, apiKey);
+    }
+}

src/main/java/de/rwu/easydrop/api/client/EbayItemDataSource.java

@@ -43,7 +43,7 @@ public final class EbayItemDataSource extends AbstractDataSource {
      * @param searchQuery Exact product name or other valid identifier.
      */
     @Override
-    public URL createApiUrl(final String searchQuery) throws MalformedURLException {
+    protected URL createApiUrl(final String searchQuery) throws MalformedURLException {
         return new URL(baseUrl
                 + "/buy/browse/v1/item_summary/search?q="
                 + searchQuery
@@ -57,7 +57,7 @@ public final class EbayItemDataSource extends AbstractDataSource {
      * @param json    Product data
      * @return Finished ProductDTO
      */
-    public ProductDTO buildProductDTO(final ProductDTO product, final String json) {
+    protected ProductDTO buildProductDTO(final ProductDTO product, final String json) {
         String root = "$.itemSummaries[0].";
         ReadContext ctx = JsonPath.parse(json);
 

src/main/java/de/rwu/easydrop/exception/DataSourceException.java

@@ -0,0 +1,27 @@
+package de.rwu.easydrop.exception;
+
+/**
+ * Exception that signifies the data of a Product are invalid.
+ *
+ * @since 0.2.0
+ */
+public class DataSourceException extends RuntimeException {
+    /**
+     * Throws an exception that signifies the data of a Product are invalid.
+     *
+     * @param message
+     */
+    public DataSourceException(final String message) {
+        super(message);
+    }
+
+    /**
+     * Throws an exception that signifies the data of a Product are invalid.
+     *
+     * @param message
+     * @param cause
+     */
+    public DataSourceException(final String message, final Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/de/rwu/easydrop/exception/InvalidProductException.java

@@ -0,0 +1,27 @@
+package de.rwu.easydrop.exception;
+
+/**
+ * Exception that signifies the data of a Product are invalid.
+ *
+ * @since 0.2.0
+ */
+public class InvalidProductException extends RuntimeException {
+    /**
+     * Throws an exception that signifies the data of a Product are invalid.
+     *
+     * @param message
+     */
+    public InvalidProductException(final String message) {
+        super(message);
+    }
+
+    /**
+     * Throws an exception that signifies the data of a Product are invalid.
+     *
+     * @param message
+     * @param cause
+     */
+    public InvalidProductException(final String message, final Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/de/rwu/easydrop/exception/package-info.java

@@ -0,0 +1,6 @@
+/**
+ * Contains EasyDrop-related custom exceptions.
+ *
+ * @since 0.2.0
+ */
+package de.rwu.easydrop.exception;