Method getDecoders

java/org/apache/tomcat/websocket/Util.java:335–363

Build the list of decoder entries from a set of decoder implementations. @param decoderClazzes Decoder implementation classes @param instanceManager Instance manager to use to create Decoder instances @return List of mappings from target type to associated decoder @throws DeploymentException If

(List<Class<? extends Decoder>> decoderClazzes,
            InstanceManager instanceManager)

     * @throws DeploymentException If a provided decoder class is not valid
     */
    public static List<DecoderEntry> getDecoders(List<Class<? extends Decoder>> decoderClazzes,
            InstanceManager instanceManager) throws DeploymentException {

        List<DecoderEntry> result = new ArrayList<>();
        if (decoderClazzes != null) {
            for (Class<? extends Decoder> decoderClazz : decoderClazzes) {
                // Need to instantiate decoder to ensure it is valid and that
                // deployment can be failed if it is not
                Decoder instance;
                try {
                    if (instanceManager == null) {
                        instance = decoderClazz.getConstructor().newInstance();
                    } else {
                        instance = (Decoder) instanceManager.newInstance(decoderClazz);
                        // Don't need this instance, so destroy it
                        instanceManager.destroyInstance(instance);
                    }
                } catch (ReflectiveOperationException | IllegalArgumentException | SecurityException |
                        NamingException e) {
                    throw new DeploymentException(
                            sm.getString("pojoMethodMapping.invalidDecoder", decoderClazz.getName()), e);
                }
                DecoderEntry entry = new DecoderEntry(getDecoderType(decoderClazz), decoderClazz);
                result.add(entry);
            }
        }

        return result;
    }


    static Set<MessageHandlerResult> getMessageHandlers(Class<?> target, MessageHandler listener,