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protected ModelAndView handleRequestInternal(HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws Exception {
    this.preprocessRequest(httpRequest);
    Request request = new Request();
    request.setHttpRequest(httpRequest);
    request.setHttpResponse(httpResponse);
    Service service = null;

    try {
        try {
            request = this.init(request);
            REQUEST.set(request);

            Object result;
            try {
                service = this.service(request);
            } catch (Throwable var11) {
                this.exception(var11, (Service)null, request);
                result = null;
                return (ModelAndView)result;
            }

            if (request.getError() != null) {
                throw request.getError();
            }

            Operation operation = this.dispatch(request, service);
            request.setOperation(operation);
            if (request.isSOAP()) {
                this.flagAsSOAP(operation);
            }

            result = this.execute(request, operation);
            if (result != null) {
                this.response(result, request, operation);
                return null;
            }
        } catch (Throwable var12) {
            if (isSecurityException(var12)) {
                throw (Exception)var12;
            }

            this.exception(var12, service, request);
        }

        return null;
    } finally {
        this.fireFinishedCallback(request);
        REQUEST.remove();
    }
}

Object execute(Request req, Operation opDescriptor) throws Throwable {
    Service serviceDescriptor = opDescriptor.getService();
    Object serviceBean = serviceDescriptor.getService();
    Object[] parameters = opDescriptor.getParameters();
    Object result = null;

    try {
        if (serviceBean instanceof DirectInvocationService) {
            String operationName = opDescriptor.getId();
            result = ((DirectInvocationService)serviceBean).invokeDirect(operationName, parameters);
        } else {
            Method operation = opDescriptor.getMethod();
            result = operation.invoke(serviceBean, parameters);
        }
    } catch (Exception var8) {
        if (var8.getCause() != null) {
            throw var8.getCause();
        }

        throw var8;
    }

    return this.fireOperationExecutedCallback(req, opDescriptor, result);
}

Operation dispatch(Request req, Service serviceDescriptor) throws Throwable {
    if (req.getRequest() == null) {
        String msg = "Could not determine geoserver request from http request " + req.getHttpRequest();
        throw new ServiceException(msg, "MissingParameterValue", "request");
    } else {
        boolean exists = this.operationExists(req, serviceDescriptor);
        if (!exists && req.getKvp().get("request") != null) {
            req.setRequest(normalize(KvpUtils.getSingleValue(req.getKvp(), "request")));
            exists = this.operationExists(req, serviceDescriptor);
        }

        Object serviceBean = serviceDescriptor.getService();
        Method operation = OwsUtils.method(serviceBean.getClass(), req.getRequest());
        if (operation != null && exists) {
            Object[] parameters = new Object[operation.getParameterTypes().length];

            for(int i = 0; i < parameters.length; ++i) {
                Class<?> parameterType = operation.getParameterTypes()[i];
                if (parameterType.isAssignableFrom(HttpServletRequest.class)) {
                    parameters[i] = req.getHttpRequest();
                } else if (parameterType.isAssignableFrom(HttpServletResponse.class)) {
                    parameters[i] = req.getHttpResponse();
                } else if (parameterType.isAssignableFrom(InputStream.class)) {
                    parameters[i] = req.getHttpRequest().getInputStream();
                } else if (parameterType.isAssignableFrom(OutputStream.class)) {
                    parameters[i] = req.getHttpResponse().getOutputStream();
                } else {
                    Object requestBean = null;
                    Throwable t = null;
                    boolean kvpParsed = false;
                    boolean xmlParsed = false;
                    if (req.getKvp() != null && req.getKvp().size() > 0) {
                        try {
                            requestBean = this.parseRequestKVP(parameterType, req);
                            kvpParsed = true;
                        } catch (Exception var14) {
                            t = var14;
                        }
                    }

                    if (req.getInput() != null) {
                        requestBean = this.parseRequestXML(requestBean, req.getInput(), req);
                        xmlParsed = true;
                    }

                    if (requestBean == null) {
                        if (t != null) {
                            throw t;
                        }

                        if ((!kvpParsed || !xmlParsed) && (kvpParsed || xmlParsed)) {
                            if (kvpParsed) {
                                throw new ServiceException("Could not parse the KVP for: " + parameterType.getName());
                            }

                            throw new ServiceException("Could not parse the XML for: " + parameterType.getName());
                        }

                        throw new ServiceException("Could not find request reader (either kvp or xml) for: " + parameterType.getName() + ", it might be that some request parameters are missing, please check the documentation");
                    }

                    Method setBaseUrl = OwsUtils.setter(requestBean.getClass(), "baseUrl", String.class);
                    if (setBaseUrl != null) {
                        setBaseUrl.invoke(requestBean, ResponseUtils.baseURL(req.getHttpRequest()));
                    }

                    if (requestBean != null) {
                        if (req.getService() == null) {
                            req.setService(this.lookupRequestBeanProperty(requestBean, "service", false));
                        }

                        if (req.getVersion() == null) {
                            req.setVersion(normalizeVersion(this.lookupRequestBeanProperty(requestBean, "version", false)));
                        }

                        if (req.getOutputFormat() == null) {
                            req.setOutputFormat(this.lookupRequestBeanProperty(requestBean, "outputFormat", true));
                        }

                        parameters[i] = requestBean;
                    }
                }
            }

            if (this.citeCompliant) {
                if (!"GetCapabilities".equalsIgnoreCase(req.getRequest())) {
                    if (req.getVersion() == null) {
                        throw new ServiceException("Could not determine version", "MissingParameterValue", "version");
                    }

                    if (!req.getVersion().matches("[0-99].[0-99].[0-99]")) {
                        throw new ServiceException("Invalid version: " + req.getVersion(), "InvalidParameterValue", "version");
                    }

                    boolean found = false;
                    Version version = new Version(req.getVersion());
                    Iterator var20 = this.loadServices().iterator();

                    while(var20.hasNext()) {
                        Service service = (Service)var20.next();
                        if (version.equals(service.getVersion())) {
                            found = true;
                            break;
                        }
                    }

                    if (!found) {
                        throw new ServiceException("Invalid version: " + req.getVersion(), "InvalidParameterValue", "version");
                    }
                }

                if (req.getService() == null) {
                    throw new ServiceException("Could not determine service", "MissingParameterValue", "service");
                }
            }

            Operation op = new Operation(req.getRequest(), serviceDescriptor, operation, parameters);
            return this.fireOperationDispatchedCallback(req, op);
        } else {
            String msg = "No such operation " + req;
            throw new ServiceException(msg, "OperationNotSupported", req.getRequest());
        }
    }
}