Java tutorial
package org.springframework.security.oauth2.common.exceptions; /** * Base exception * * @author Ryan Heaton * @author Dave Syer */ @SuppressWarnings("serial") public abstract class ClientAuthenticationException extends OAuth2Exception { public ClientAuthenticationException(String msg, Throwable t) { super(msg, t); } public ClientAuthenticationException(String msg) { super(msg); } @Override public int getHttpErrorCode() { // The spec says this is a bad request (not unauthorized) return 400; } @Override public abstract String getOAuth2ErrorCode(); }