feat: add provider.java file

feat: create a DateProvider implementation

Author: AmiyahJo

lesson_09/types/types_app/src/main/java/com/codedifferently/lesson9/dataprovider/AmiyahJonesProvider.java

@@ -0,0 +1,46 @@
+package com.codedifferently.lesson9.dataprovider;
+
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public abstract class AmiyahJonesProvider {
+
+  public abstract String getProviderName();
+
+  public abstract Map<String, Class> getColumnTypeByName();
+
+  /**
+   * Given a list of data objects, returns the list with values converted to the appropriate type.
+   *
+   * @param data A list of data objects containing values keyed by column name.
+   * @return A new list with object values converted to the appropriate type.
+   */
+  public List<Map<String, Object>> parseData(List<Map<String, String>> data) throws Exception {
+    Map<String, Class> columnTypeByName = getColumnTypeByName();
+    return data.stream().map(row -> parseRow(columnTypeByName, row)).collect(Collectors.toList());
+  }
+
+  /**
+   * Parses a single row of data using the provided column types mapping.
+   *
+   * @param columnTypeByName A map containing the type of a column keyed by its name.
+   * @param row A bag of values keyed by column name.
+   * @return A new list of data values converted to the appropriate type.
+   */
+  private Map<String, Object> parseRow(
+      Map<String, Class> columnTypeByName, Map<String, String> row) {
+    var parsedRow = new java.util.HashMap<String, Object>();
+    row.forEach(
+        (key, value) -> {
+          Class type = columnTypeByName.get(key);
+          try {
+            parsedRow.put(key, type.getConstructor(String.class).newInstance(value));
+          } catch (Exception e) {
+            throw new RuntimeException(
+                "Error parsing data for " + key + " as type " + type.getName());
+          }
+        });
+    return parsedRow;
+  }
+}

lesson_09/types/types_app/src/main/resources/data/amiyahjones.json

@@ -0,0 +1,92 @@
+[
+  {
+    "column1": "5731499272613477376",
+    "column2": "2002066591",
+    "column3": "vo591",
+    "column4": "false",
+    "column5": "11686",
+    "column6": "2.90396E38",
+    "column7": "7.899162733804963E307"
+  },
+  {
+    "column1": "3629992685213369344",
+    "column2": "394292213",
+    "column3": "arxbjv",
+    "column4": "false",
+    "column5": "25971",
+    "column6": "3.3176412E38",
+    "column7": "1.422747221356426E307"
+  },
+  {
+    "column1": "3634306241562193408",
+    "column2": "1759402995",
+    "column3": "rp95ft",
+    "column4": "true",
+    "column5": "15517",
+    "column6": "4.4703475E37",
+    "column7": "1.5779687820629317E308"
+  },
+  {
+    "column1": "2268654800340631040",
+    "column2": "893983092",
+    "column3": "lfk8u",
+    "column4": "true",
+    "column5": "2526",
+    "column6": "2.8990186E38",
+    "column7": "7.688984742776194E307"
+  },
+  {
+    "column1": "3054712055809444864",
+    "column2": "1143998344",
+    "column3": "rxbse3ki",
+    "column4": "false",
+    "column5": "24432",
+    "column6": "2.612388E36",
+    "column7": "5.274382911630398E307"
+  },
+  {
+    "column1": "1352645309887328256",
+    "column2": "503833821",
+    "column3": "qbz6jdowfe",
+    "column4": "false",
+    "column5": "7617",
+    "column6": "1.9916393E38",
+    "column7": "3.3191786026811584E307"
+  },
+  {
+    "column1": "8637983229365371904",
+    "column2": "1185216615",
+    "column3": "9sn7fw2o3q",
+    "column4": "false",
+    "column5": "23224",
+    "column6": "1.4122802E38",
+    "column7": "1.580014576135557E308"
+  },
+  {
+    "column1": "9067948480444420096",
+    "column2": "1081656270",
+    "column3": "7f0ne",
+    "column4": "false",
+    "column5": "32102",
+    "column6": "1.3807303E38",
+    "column7": "1.2057784493311825E308"
+  },
+  {
+    "column1": "6604084776146575360",
+    "column2": "1701387671",
+    "column3": "3v2qgcaetf0",
+    "column4": "true",
+    "column5": "14055",
+    "column6": "1.0123542E38",
+    "column7": "1.7725263417131191E308"
+  },
+  {
+    "column1": "8522793738323822592",
+    "column2": "583151778",
+    "column3": "p4zuv5m",
+    "column4": "false",
+    "column5": "4456",
+    "column6": "2.3024422E37",
+    "column7": "9.653626411185625E307"
+  }
+]