Package com.greenloop.auth_service.security

Class JwtService

java.lang.Object

com.greenloop.auth_service.security.JwtService

@Service
public class JwtService
extends Object

Utility service for generating and validating JWT tokens.

Constructor Summary

Constructors

Constructor	Description
JwtService()

Method Summary

Modifier and Type	Method	Description
io.jsonwebtoken.Claims	extractAllClaims(String token)	Parses and validates the token, returning all claims or throwing a descriptive exception for invalid/expired tokens.
<T> T	extractClaim(String token, Function<io.jsonwebtoken.Claims,T> claimsResolver)	Extracts a single claim using the provided resolver function.
Date	extractExpiration(String token)	Returns expiration date of the token.
String	extractRole(String token)	Returns the role claim from the token.
UUID	extractUserId(String token)	Returns the user id (subject) from the token.
String	extractUsername(String token)	Returns the email (username) from the token.
String	generateToken(User user)	Generates a signed JWT for the given user with role and email claims.
boolean	isTokenExpired(String token)	Indicates whether the token is expired.
boolean	isTokenValid(String token)	Validates the token structure/signature and expiration.
boolean	isTokenValid(String token, org.springframework.security.core.userdetails.UserDetails userDetails)	Validates the token against the given user details.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JwtService

public JwtService()

Method Details

generateToken

public String generateToken(User user)

Generates a signed JWT for the given user with role and email claims.

extractAllClaims

public io.jsonwebtoken.Claims extractAllClaims(String token)

Parses and validates the token, returning all claims or throwing a descriptive exception for invalid/expired tokens.

extractClaim

public <T> T extractClaim(String token,
 Function<io.jsonwebtoken.Claims,T> claimsResolver)

Extracts a single claim using the provided resolver function.

extractUsername

public String extractUsername(String token)

Returns the email (username) from the token.

extractUserId

public UUID extractUserId(String token)

Returns the user id (subject) from the token.

extractRole

public String extractRole(String token)

Returns the role claim from the token.

extractExpiration

public Date extractExpiration(String token)

Returns expiration date of the token.

isTokenExpired

public boolean isTokenExpired(String token)

Indicates whether the token is expired.

isTokenValid

public boolean isTokenValid(String token,
 org.springframework.security.core.userdetails.UserDetails userDetails)

Validates the token against the given user details.

isTokenValid

public boolean isTokenValid(String token)

Validates the token structure/signature and expiration.