BAEL-3462 Univosity Parsers (#9222)

* BAEL-3462 CSV Univosity Example

* Added a row processor example

libraries-data-2/src/test/java/com/baeldung/univocity/ParsingServiceUnitTest.java

@@ -0,0 +1,112 @@
+package com.baeldung.univocity;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Test;
+
+import com.baeldung.univocity.model.Product;
+
+public class ParsingServiceUnitTest {
+
+    @Test
+    public void givenCsvFile_thenParsedResultsShouldBeReturned() {
+        ParsingService parsingService = new ParsingService();
+        List<String[]> productData = parsingService.parseCsvFile("src/test/resources/productList.csv");
+        assertEquals(3, productData.size());
+        assertEquals(3, productData.get(0).length);
+        assertEquals("A8993-10", productData.get(0)[0]);
+        assertEquals("Extra large widget", productData.get(0)[1]);
+        assertEquals("35.42", productData.get(0)[2]);
+        assertEquals("D-2938-1", productData.get(1)[0]);
+        assertEquals("Winding widget \"Deluxe Model\"", productData.get(1)[1]);
+        assertEquals("245.99", productData.get(1)[2]);
+        assertEquals("R3212-32", productData.get(2)[0]);
+        assertEquals("Standard widget", productData.get(2)[1]);
+        assertEquals("2.34", productData.get(2)[2]);
+    }
+
+    @Test
+    public void givenFixedWidthFile_thenParsedResultsShouldBeReturned() {
+        ParsingService parsingService = new ParsingService();
+        List<String[]> productData = parsingService.parseFixedWidthFile("src/test/resources/productList.txt");
+        // Note: any extra spaces on the end will cause a null line to be added
+        assertEquals(3, productData.size());
+        assertEquals(3, productData.get(0).length);
+        assertEquals("A8993-10", productData.get(0)[0]);
+        assertEquals("Extra large widget", productData.get(0)[1]);
+        assertEquals("35.42", productData.get(0)[2]);
+        assertEquals("D-2938-1", productData.get(1)[0]);
+        assertEquals("Winding widget \"Deluxe Model\"", productData.get(1)[1]);
+        assertEquals("245.99", productData.get(1)[2]);
+        assertEquals("R3212-32", productData.get(2)[0]);
+        assertEquals("Standard widget", productData.get(2)[1]);
+        assertEquals("2.34", productData.get(2)[2]);
+    }
+
+    @Test
+    public void givenDataAndCsvOutputType_thenCsvFileProduced() {
+        OutputService outputService = new OutputService();
+        List<Object[]> productData = new ArrayList<>();
+        productData.add(new Object[] { "1000-3-0", "Widget No. 96", "5.67" });
+        productData.add(new Object[] { "G930-M-P", "1/4\" Wocket", ".67" });
+        productData.add(new Object[] { "8080-0-M", "No. 54 Jumbo Widget", "35.74" });
+        outputService.writeData(productData, OutputService.OutputType.CSV, "src/test/resources/outputProductList.csv");
+
+        ParsingService parsingService = new ParsingService();
+        List<String[]> writtenData = parsingService.parseCsvFile("src/test/resources/outputProductList.csv");
+        assertEquals(3, writtenData.size());
+        assertEquals(3, writtenData.get(0).length);
+    }
+
+    @Test
+    public void givenDataAndFixedWidthOutputType_thenFixedWidthFileProduced() {
+        OutputService outputService = new OutputService();
+        List<Object[]> productData = new ArrayList<>();
+        productData.add(new Object[] { "1000-3-0", "Widget No. 96", "5.67" });
+        productData.add(new Object[] { "G930-M-P", "1/4\" Wocket", ".67" });
+        productData.add(new Object[] { "8080-0-M", "No. 54 Jumbo Widget", "35.74" });
+        outputService.writeData(productData, OutputService.OutputType.FIXED_WIDTH, "src/test/resources/outputProductList.txt");
+
+        ParsingService parsingService = new ParsingService();
+        List<String[]> writtenData = parsingService.parseFixedWidthFile("src/test/resources/outputProductList.txt");
+        assertEquals(3, writtenData.size());
+        assertEquals(3, writtenData.get(0).length);
+    }
+
+    @Test
+    public void givenCsvFile_thenCsvFileParsedIntoBeans() {
+        ParsingService parsingService = new ParsingService();
+        List<Product> products = parsingService.parseCsvFileIntoBeans("src/test/resources/productListWithHeaders.csv");
+        assertEquals(2, products.size());
+        assertEquals("Product [Product Number: 99-378AG, Description: Wocket Widget #42, Unit Price: 3.56]", products.get(0)
+            .toString());
+        assertEquals("Product [Product Number: TB-333-0, Description: Turbine Widget replacement kit, Unit Price: 800.99]", products.get(1)
+            .toString());
+    }
+
+    @Test
+    public void givenLisOfProduct_thenWriteFixedWidthFile() {
+        OutputService outputService = new OutputService();
+        Product product = new Product();
+        product.setProductNumber("007-PPG0");
+        product.setDescription("3/8\" x 1\" Wocket");
+        product.setUnitPrice(45.99f);
+        List<Product> products = new ArrayList<>();
+        products.add(product);
+        outputService.writeBeanToFixedWidthFile(products, "src/test/resources/productListWithHeaders.txt");
+        ParsingService parsingService = new ParsingService();
+        List<String[]> writtenData = parsingService.parseFixedWidthFile("src/test/resources/productListWithHeaders.txt");
+        assertEquals(2, writtenData.size());
+        assertEquals(3, writtenData.get(0).length);
+    }
+
+    @Test
+    public void givenLargeCsvFile_thenParsedDataShouldBeReturned() {
+        ParsingService parsingService = new ParsingService();
+        List<String[]> productData = parsingService.parseCsvFileInBatches("src/test/resources/largeProductList.csv");
+        assertEquals(36, productData.size());
+    }
+}

libraries-data-2/src/test/resources/largeProductList.csv

@@ -0,0 +1,36 @@
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34

libraries-data-2/src/test/resources/productList.csv

@@ -0,0 +1,3 @@
+A8993-10,"Extra large widget",35.42
+D-2938-1,"Winding widget ""Deluxe Model""",245.99
+R3212-32,"Standard widget",2.34

libraries-data-2/src/test/resources/productList.txt

@@ -0,0 +1,3 @@
+A8993-10Extra large widget            35.42     
+D-2938-1Winding widget "Deluxe Model" 245.99    
+R3212-32Standard widget               2.34      

libraries-data-2/src/test/resources/productListWithHeaders.csv

@@ -0,0 +1,3 @@
+product_no, description, unit_price
+99-378AG,Wocket Widget #42,3.56
+TB-333-0,Turbine Widget replacement kit,800.99

libraries-data-2/src/test/resources/productListWithHeaders.txt

@@ -0,0 +1,2 @@
+product_description                   unit_price
+007-PPG03/8" x 1" Wocket              45.99