private void register ( WebSocketWireProtocol wireProtocolVersion , WsHandshakeValidator validator ) { if ( wireProtocolVersion == null ) { throw new NullPointerException ( "wireProtocolVersion" ) ; } if ( validator == null ) { throw new NullPointerException ( "validator" ) ; } WsHandshakeValidator existingValidator = handshakeValidatorsByWireProtocolVersion . put ( wireProtocolVersion , validator ) ; logger . trace ( "Class " + validator . getClass ( ) . getName ( ) + " registered to support websocket handshake for protocol " + wireProtocolVersion ) ; if ( existingValidator != null ) { logger . trace ( "Multiple handshake validators have registered to support wire protocol " + wireProtocolVersion + ". Using class " + this . getClass ( ) . getName ( ) + ' ' ) ; } }
Allow subclasses to register themselves as validators for specific versions of the wire protocol .