add jackson guidance how to deserialize Parameter sub classes

src/main/java/com/whatsapp/api/domain/messages/Parameter.java

@@ -1,14 +1,22 @@
 package com.whatsapp.api.domain.messages;
 
 
-import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.*;
 import com.whatsapp.api.domain.messages.type.ParameterType;
 
 /**
  * The type Parameter.
  */
+
 @JsonInclude(JsonInclude.Include.NON_NULL)
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type", visible = true)
+@JsonSubTypes({@JsonSubTypes.Type(value = TextParameter.class, name = "text"),
+        @JsonSubTypes.Type(value = CurrencyParameter.class, name = "currency"),
+        @JsonSubTypes.Type(value = DateTimeParameter.class, name = "date_time"),
+        @JsonSubTypes.Type(value = ImageParameter.class, name = "image"),
+        @JsonSubTypes.Type(value = VideoParameter.class, name = "video"),
+        @JsonSubTypes.Type(value = DocumentParameter.class, name = "document"),
+        @JsonSubTypes.Type(value = ButtonPayloadParameter.class, name = "payload")})
 public class Parameter {
     @JsonProperty("type")
     private final ParameterType type;
@@ -18,6 +26,7 @@ public class Parameter {
      *
      * @param type the type
      */
+    @JsonCreator
     protected Parameter(ParameterType type) {
         this.type = type;
     }

src/main/java/com/whatsapp/api/domain/messages/TextParameter.java

@@ -12,9 +12,13 @@
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public class TextParameter extends Parameter {
     @JsonProperty("text")
-    private final String text;
+    private String text;
 
 
+    public TextParameter() {
+        super(ParameterType.TEXT);
+    }
+
     /**
      * Instantiates a new Text parameter.
      *

src/test/java/com/whatsapp/api/domain/messages/ParameterDeserializationTest.java

@@ -0,0 +1,80 @@
+package com.whatsapp.api.domain.messages;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.whatsapp.api.domain.messages.type.ParameterType;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ParameterDeserializationTest {
+
+    @Test
+    public void testTextParameterDeserialization() throws Exception {
+        String json = "{\"type\":\"text\", \"text\": \"hello\"}";
+        ObjectMapper objectMapper = new ObjectMapper();
+        Parameter parameter = objectMapper.readValue(json, Parameter.class);
+
+        assertInstanceOf(TextParameter.class, parameter);
+        assertEquals(ParameterType.TEXT, parameter.getType());
+    }
+
+    @Test
+    public void testCurrencyParameterDeserialization() throws Exception {
+        String json = "{\"type\":\"currency\"}";
+        ObjectMapper objectMapper = new ObjectMapper();
+        Parameter parameter = objectMapper.readValue(json, Parameter.class);
+
+        assertInstanceOf(CurrencyParameter.class, parameter);
+        assertEquals(ParameterType.CURRENCY, parameter.getType());
+    }
+
+    @Test
+    public void testVideoParameterDeserialization() throws Exception {
+        String json = "{\"type\":\"video\", \"video\": {\"id\": \"21\", \"link\": \"http://example.com/video.mp4\"}}";
+        ObjectMapper objectMapper = new ObjectMapper();
+        Parameter parameter = objectMapper.readValue(json, Parameter.class);
+
+        assertInstanceOf(VideoParameter.class, parameter);
+        assertEquals(ParameterType.VIDEO, parameter.getType());
+    }
+
+    @Test
+    public void testDateTimeParameterDeserialization() throws Exception {
+        String json = "{\"type\":\"date_time\", \"date_time\": {\"minute\": \"12\"}}";
+        ObjectMapper objectMapper = new ObjectMapper();
+        Parameter parameter = objectMapper.readValue(json, Parameter.class);
+
+        assertInstanceOf(DateTimeParameter.class, parameter);
+        assertEquals(ParameterType.DATE_TIME, parameter.getType());
+    }
+
+    @Test
+    public void testImageParameterDeserialization() throws Exception {
+        String json = "{\"type\":\"image\", \"image\": {\"id\": \"21\", \"link\": \"http://example.com/image.jpg\"}}";
+        ObjectMapper objectMapper = new ObjectMapper();
+        Parameter parameter = objectMapper.readValue(json, Parameter.class);
+
+        assertInstanceOf(ImageParameter.class, parameter);
+        assertEquals(ParameterType.IMAGE, parameter.getType());
+    }
+
+    @Test
+    public void testDocumentParameterDeserialization() throws Exception {
+        String json = "{\"type\":\"document\", \"document\": {\"id\": \"21\", \"link\": \"http://example.com/document.pdf\", \"filename\":\"hello.doc\" }}";
+        ObjectMapper objectMapper = new ObjectMapper();
+        Parameter parameter = objectMapper.readValue(json, Parameter.class);
+
+        assertInstanceOf(DocumentParameter.class, parameter);
+        assertEquals(ParameterType.DOCUMENT, parameter.getType());
+    }
+
+    @Test
+    public void testButtonPayloadParameterDeserialization() throws Exception {
+        String json = "{\"type\":\"payload\", \"payload\": \"button_payload\"}";
+        ObjectMapper objectMapper = new ObjectMapper();
+        Parameter parameter = objectMapper.readValue(json, Parameter.class);
+
+        assertInstanceOf(ButtonPayloadParameter.class, parameter);
+        assertEquals(ParameterType.PAYLOAD, parameter.getType());
+    }
+}