Pass a JSONObject instead of a Map in the constructor. Save 'json' to return as String.

Author: ul-jf

src/main/java/io/ipgeolocation/api/GeolocationCurrency.java

@@ -1,16 +1,27 @@
 package io.ipgeolocation.api;
 
-import java.util.Map;
+import java.util.Objects;
+import org.json.JSONObject;
 
 public class GeolocationCurrency {
   private final String name;
   private final String code;
   private final String symbol;
+  private final JSONObject json;
 
-  GeolocationCurrency(Map<String, Object> json) {
-    this.name = (String) json.get("name");
-    this.code = (String) json.get("code");
-    this.symbol = (String) json.get("symbol");
+  GeolocationCurrency(JSONObject json) {
+    if (Objects.isNull(json)) {
+      throw new IllegalArgumentException("'json' must not be null");
+    }
+
+    if (json.isEmpty()) {
+      throw new IllegalArgumentException("'json' must not be empty");
+    }
+
+    this.name = json.getString("name");
+    this.code = json.getString("code");
+    this.symbol = json.getString("symbol");
+    this.json = json;
   }
 
   public String getName() {
@@ -24,4 +35,9 @@ public String getCode() {
   public String getSymbol() {
     return symbol;
   }
+
+  @Override
+  public String toString() {
+    return json.toString(2);
+  }
 }