Add code for BAEL-5878: Getting a Value in JSONObject (#13157)

* BAEL-5878: Getting a Value in JSONObject. Add JsonObjectValueGetter with unit tests * Move json-value-getter under json-2 module * Update packages for the source and unit test files * Rename test class, move employee.json under test/resources Co-authored-by: Rafael Engibaryan <rafael.engibaryan.1@gmail.com>
2022-12-14 14:58:33 +04:00
parent 78124d60dd
commit 9e7a6d2b3d
4 changed files with 197 additions and 0 deletions
@@ -0,0 +1,69 @@
+package com.baeldung.jsonvaluegetter;
+
+import org.apache.commons.io.IOUtils;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+
+public class JSONObjectValueGetterUnitTest {
+
+    private static JSONObject jsonObject;
+    private static JSONObjectValueGetter jsonObjectValueGetter = new JSONObjectValueGetter();
+
+    @BeforeAll
+    public static void loadJsonContent() throws IOException {
+        InputStream inputStream = JSONObjectValueGetterUnitTest.class.getClassLoader().getResourceAsStream("employee.json");
+        String jsonString = IOUtils.toString(inputStream, "UTF-8");
+        jsonObject = new JSONObject(jsonString);
+    }
+
+    @Test
+    public void getValueDirectly() {
+        JSONArray family = jsonObject.getJSONArray("family");
+        JSONObject sonObject = family.getJSONObject(1);
+        JSONObject sonData = sonObject.getJSONObject("son");
+        String sonName = sonData.getString("name");
+        Assertions.assertEquals(sonName, "Peter");
+    }
+
+    @Test
+    public void getAllAssociatedValuesRecursively() {
+        List<String> values = jsonObjectValueGetter.getValuesInObject(jsonObject, "son");
+        Assertions.assertEquals(values.size(), 1);
+
+        String sonString = values.get(0);
+        Assertions.assertTrue(sonString.contains("Peter"));
+        Assertions.assertTrue(sonString.contains("Schoolboy"));
+        Assertions.assertTrue(sonString.contains("11"));
+
+        values = jsonObjectValueGetter.getValuesInObject(jsonObject, "name");
+        Assertions.assertEquals(values.size(), 3);
+
+        Assertions.assertEquals(values.get(0), "Bob");
+        Assertions.assertEquals(values.get(1), "Alice");
+        Assertions.assertEquals(values.get(2), "Peter");
+    }
+
+    @Test
+    public void getNthValueRecursively() {
+        Assertions.assertEquals(jsonObjectValueGetter.getNthValue(jsonObject, "name", 1), "Bob");
+        Assertions.assertEquals(jsonObjectValueGetter.getNthValue(jsonObject, "name", 2), "Alice");
+        Assertions.assertEquals(jsonObjectValueGetter.getNthValue(jsonObject, "name", 3), "Peter");
+        Assertions.assertNull(jsonObjectValueGetter.getNthValue(jsonObject, "nonExistingKey", 1));
+    }
+
+    @Test
+    public void getCountRecursively() {
+        Assertions.assertEquals(jsonObjectValueGetter.getCount(jsonObject, "name"), 3);
+        Assertions.assertEquals(jsonObjectValueGetter.getCount(jsonObject, "age"), 3);
+        Assertions.assertEquals(jsonObjectValueGetter.getCount(jsonObject, "occupation"), 1);
+        Assertions.assertEquals(jsonObjectValueGetter.getCount(jsonObject, "nonExistingKey"), 0);
+    }
+}
@@ -0,0 +1,30 @@
+{
+  "name" : "Bob",
+  "profession" : "Software engineer",
+  "department" : "Research",
+  "age" : 40,
+  "family" : [
+    {
+      "wife" : {
+        "name" : "Alice",
+        "profession" : "Doctor",
+        "age" : 38
+      }
+    },
+    {
+      "son" : {
+        "name" : "Peter",
+        "occupation" : "Schoolboy",
+        "age" : 11
+      }
+    }
+  ],
+  "performance" : [
+    {
+      "2020" : 4.5
+    },
+    {
+      "2021" : 4.8
+    }
+  ]
+}