Add JSON dependency

pom.xml

@@ -8,12 +8,17 @@
     <version>1.0.0-SNAPSHOT</version>
 
     <properties>
-        <maven.compiler.source>18</maven.compiler.source>
-        <maven.compiler.target>18</maven.compiler.target>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>org.json</groupId>
+            <artifactId>json</artifactId>
+            <version>20240303</version>
+        </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>

src/main/java/com/yocto/yoclib/jsonrpc/Message.java

@@ -1,5 +1,64 @@
 package com.yocto.yoclib.jsonrpc;
 
-public class Message{
+import org.json.JSONObject;
+
+public abstract class Message{
+
+    private final JSONObject value;
+
+    /**
+     *
+     * @param value The object value
+     */
+    protected Message(JSONObject value){
+        this.value = value;
+    }
+
+    /**
+     *
+     * @return The JSON-RPC version value
+     */
+    public String getJSONRPC(){
+        return this.hasJSONRPC()?this.value.getString("jsonrpc"):null;
+    }
+
+    /**
+     * @return bool
+     */
+    public boolean hasJSONRPC(){
+        return this.value.has("jsonrpc") && this.value.get("jsonrpc")!=null;
+    }
+
+    /**
+     *
+     * @return True if message is a request, false if not.
+     */
+    public boolean isRequest(){
+        return this.value.has("method") || this.value.has("params");
+    }
+
+    /**
+     *
+     * @return True if message is a response, false if not.
+     */
+    public boolean isResponse(){
+        return this.value.has("result") || this.value.has("error");
+    }
+
+    /**
+     *
+     * @return True if message is version 2.0, false if not.
+     */
+    public boolean isVersion2(){
+        return "2.0".equals(this.getJSONRPC());
+    }
+
+    /**
+     *
+     * @return The object value
+     */
+    public JSONObject toObject(){
+        return this.value;
+    }
 
 }

src/main/java/com/yocto/yoclib/jsonrpc/NotificationMessage.java

@@ -1,5 +1,14 @@
 package com.yocto.yoclib.jsonrpc;
 
+import org.json.JSONObject;
+
 public class NotificationMessage extends RequestMessage{
 
+    /**
+     * @param value The object value
+     */
+    protected NotificationMessage(JSONObject value) {
+        super(value);
+    }
+
 }

src/main/java/com/yocto/yoclib/jsonrpc/RequestMessage.java

@@ -1,5 +1,14 @@
 package com.yocto.yoclib.jsonrpc;
 
+import org.json.JSONObject;
+
 public class RequestMessage extends Message{
 
+    /**
+     * @param value The object value
+     */
+    protected RequestMessage(JSONObject value) {
+        super(value);
+    }
+
 }

src/main/java/com/yocto/yoclib/jsonrpc/ResponseMessage.java

@@ -1,5 +1,14 @@
 package com.yocto.yoclib.jsonrpc;
 
+import org.json.JSONObject;
+
 public class ResponseMessage extends Message{
 
+    /**
+     * @param value The object value
+     */
+    protected ResponseMessage(JSONObject value) {
+        super(value);
+    }
+
 }