feat: TokenManager supports to read a bean from a token

simple-jwt/src/main/java/com/onixbyte/jwt/TokenCreator.java

@@ -17,11 +17,6 @@
 
 package com.onixbyte.jwt;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
-
-import java.security.InvalidKeyException;
-import java.security.NoSuchAlgorithmException;
-
 /**
  *
  */

simple-jwt/src/main/java/com/onixbyte/jwt/TokenManager.java

@@ -0,0 +1,7 @@
+package com.onixbyte.jwt;
+
+public interface TokenManager<T> extends TokenCreator, TokenResolver {
+
+    T extract(String token);
+
+}

simple-jwt/src/main/java/com/onixbyte/jwt/TokenResolver.java

@@ -17,6 +17,7 @@
 
 package com.onixbyte.jwt;
 
+import com.onixbyte.jwt.constant.RegisteredClaims;
 import com.onixbyte.jwt.data.RawTokenComponent;
 
 import java.util.Map;
@@ -27,30 +28,61 @@
 public interface TokenResolver {
 
     /**
+     * Verifies the HMAC signature of the provided JWT.
+     * <p>
+     * Splits the token into its components and uses the configured algorithm and secret to check
+     * the signature's validity. If the signature does not match, an exception is thrown by the
+     * underlying cryptographic utility.
      *
-     * @param token
+     * @param token the JWT string to verify
+     * @throws IllegalArgumentException if the token is malformed or the signature verification
+     *                                  fails due to an invalid algorithm, key, or
+     *                                  mismatched signature
      */
     void verify(String token);
 
     /**
+     * Retrieves the header claims from the provided JWT.
+     * <p>
+     * Decodes the Base64-encoded header and deserialises it into a map of strings.
      *
-     * @param token
-     * @return
+     * @param token the JWT string from which to extract the header
+     * @return a map containing the header claims as key-value pairs
+     * @throws IllegalArgumentException if the token is malformed or the header cannot be
+     *                                  deserialised due to invalid JSON format
      */
     Map<String, String> getHeader(String token);
 
     /**
+     * Retrieves the payload claims from the provided JWT, excluding registered claims.
+     * <p>
+     * Decodes the Base64-encoded payload, deserialises it into a map, and removes any registered
+     * claims as defined in {@link RegisteredClaims}.
      *
-     * @param payload
-     * @return
+     * @param token the JWT string from which to extract the payload
+     * @return a map containing the custom payload claims as key-value pairs
+     * @throws IllegalArgumentException if the token is malformed or the payload cannot be
+     *                                  deserialised due to invalid JSON format
      */
-    Map<String, Object> getPayload(String payload);
+    Map<String, Object> getPayload(String token);
 
     /**
+     * Splits a JWT into its raw components: header, payload, and signature.
      *
-     * @param token
-     * @return
+     * @param token the JWT string to split
+     * @return a {@link RawTokenComponent} containing the header, payload, and signature as strings
+     * @throws IllegalArgumentException if the token does not consist of exactly three parts
+     *                                  separated by dots
      */
-    RawTokenComponent splitToken(String token);
+    default RawTokenComponent splitToken(String token) {
+        var tokenTuple = token.split("\\.");
+
+        if (tokenTuple.length != 3) {
+            throw new IllegalArgumentException(
+                    "The provided JWT is invalid: it must consist of exactly three parts separated by dots.");
+        }
+
+        return new RawTokenComponent(tokenTuple[0], tokenTuple[1], tokenTuple[2]);
+    }
 
 }

simple-jwt/src/main/java/com/onixbyte/jwt/impl/HmacTokenManager.java

@@ -0,0 +1,50 @@
+package com.onixbyte.jwt.impl;
+
+import com.onixbyte.devkit.utils.MapUtil;
+import com.onixbyte.devkit.utils.ObjectMapAdapter;
+import com.onixbyte.jwt.TokenCreator;
+import com.onixbyte.jwt.TokenManager;
+import com.onixbyte.jwt.TokenPayload;
+import com.onixbyte.jwt.TokenResolver;
+import com.onixbyte.jwt.constant.Algorithm;
+
+import java.util.Map;
+
+public class HmacTokenManager<T> implements TokenManager<T> {
+
+    private final TokenCreator tokenCreator;
+    private final TokenResolver tokenResolver;
+    private final ObjectMapAdapter<T> adapter;
+
+    public HmacTokenManager(Algorithm algorithm, String issuer, String secret, ObjectMapAdapter<T> adapter) {
+        this.tokenCreator = new HmacTokenCreator(algorithm, issuer, secret);
+        this.tokenResolver = new HmacTokenResolver(algorithm, secret);
+        this.adapter = adapter;
+    }
+
+    @Override
+    public T extract(String token) {
+        var payloadMap = getPayload(token);
+        return MapUtil.mapToObject(payloadMap, adapter);
+    }
+
+    @Override
+    public String sign(TokenPayload payload) {
+        return tokenCreator.sign(payload);
+    }
+
+    @Override
+    public void verify(String token) {
+        tokenResolver.verify(token);
+    }
+
+    @Override
+    public Map<String, String> getHeader(String token) {
+        return tokenResolver.getHeader(token);
+    }
+
+    @Override
+    public Map<String, Object> getPayload(String token) {
+        return tokenResolver.getPayload(token);
+    }
+}

simple-jwt/src/main/java/com/onixbyte/jwt/impl/HmacTokenResolver.java

@@ -73,26 +73,6 @@ public HmacTokenResolver(Algorithm algorithm, String secret) {
         this.objectMapper = ObjectMapperHolder.getInstance().getObjectMapper();
     }
 
-    /**
-     * Splits a JWT into its raw components: header, payload, and signature.
-     *
-     * @param token the JWT string to split
-     * @return a {@link RawTokenComponent} containing the header, payload, and signature as strings
-     * @throws IllegalArgumentException if the token does not consist of exactly three parts
-     *                                  separated by dots
-     */
-    @Override
-    public RawTokenComponent splitToken(String token) {
-        var tokenTuple = token.split("\\.");
-
-        if (tokenTuple.length != 3) {
-            throw new IllegalArgumentException(
-                    "The provided JWT is invalid: it must consist of exactly three parts separated by dots.");
-        }
-
-        return new RawTokenComponent(tokenTuple[0], tokenTuple[1], tokenTuple[2]);
-    }
-
     /**
      * Verifies the HMAC signature of the provided JWT.
      * <p>