Added utility structures + tests

src/main/java/de/rwu/easydrop/service/retriever/CatalogueRetriever.java

@@ -0,0 +1,75 @@
+package de.rwu.easydrop.service.retriever;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.naming.ConfigurationException;
+
+import de.rwu.easydrop.model.Product;
+import de.rwu.easydrop.model.ProductCatalogue;
+import de.rwu.easydrop.util.ProductsConfig;
+import lombok.Data;
+
+/**
+ * Retrieves data for all products of multiple catalogues.
+ *
+ * @since 0.2.0
+ */
+@Data
+public class CatalogueRetriever {
+    /**
+     * User-configured products.
+     */
+    private ProductsConfig productsConfig;
+    /**
+     * Product Retriever.
+     */
+    private ProductRetriever productRetriever;
+    /**
+     * Product catalogue.
+     */
+    private List<ProductCatalogue> productCatalogues;
+
+    /**
+     * Creates a new instance.
+     *
+     * @param newProductsConfig
+     * @param newProductRetriever
+     */
+    public CatalogueRetriever(
+            final ProductsConfig newProductsConfig, final ProductRetriever newProductRetriever) {
+        productRetriever = newProductRetriever;
+        productsConfig = newProductsConfig;
+        productCatalogues = new ArrayList<>();
+    }
+
+    /**
+     * Loads catalogues as configured by the user.
+     *
+     * @throws ConfigurationException
+     */
+    public void loadCatalogues() throws ConfigurationException {
+        productsConfig.loadConfig();
+
+        for (ProductCatalogue pCat : productsConfig.getProductCatalogues()) {
+            ProductCatalogue newProductCatalogue = new ProductCatalogue(
+                    pCat.getProductName(), pCat.getDescription());
+
+            for (Product product : pCat.getProducts()) {
+                Product newProduct = new Product();
+                newProduct.setDataOrigin(product.getDataOrigin());
+                newProduct.setProductId(product.getProductId());
+
+                if (product.getDataOrigin().equals("Amazon")) {
+                    newProduct = productRetriever.getProductFromAmazon(product.getProductId());
+                } else if (product.getDataOrigin().equals("eBay")) {
+                    newProduct = productRetriever.getProductFromEbay(product.getProductId());
+                }
+
+                newProductCatalogue.addProduct(newProduct);
+            }
+
+            productCatalogues.add(newProductCatalogue);
+        }
+    }
+}