containsKey method

bool containsKey(String claimName)

Indicates if a claim exists or not.

The claimName can be the Claim Name of a registered claim or a non-registered claim.

Implementation

bool containsKey(String claimName) {
  if (!registeredClaimNames.contains(claimName)) {
    // Non-registered claim
    return _otherClaims.containsKey(claimName);
  } else {
    // Registered claim
    switch (claimName) {
      case 'iss':
        return issuer != null;
      case 'sub':
        return subject != null;
      case 'aud':
        return audience != null;
      case 'exp':
        return expiry != null;
      case 'nbf':
        return notBefore != null;
      case 'iat':
        return issuedAt != null;
      case 'jti':
        return jwtId != null;
      default:
        // coding error: all the registered claims should have been covered
        throw UnsupportedError('bad non-registered claim: $claimName');
    }
  }
}