javax.ws.rs.ApplicationPath#value ( )源码实例Demo

public void setApplicationInfo(ApplicationInfo application) {
    if (application != null && application.getProvider() != null) {
        final Class<?> clazz = application.getProvider().getClass();
        final ApplicationPath path = ResourceUtils.locateApplicationPath(clazz);

        if (path != null) {
            applicationPath = path.value();

            if (!applicationPath.startsWith("/")) {
                applicationPath = "/" + applicationPath;
            }

            if (applicationPath.endsWith("/")) {
                applicationPath = applicationPath.substring(0, applicationPath.lastIndexOf('/'));
            }
        }
    }
}
 

private static String getApplicationPath(Application applicationConfig) {
	if (applicationConfig == null) {
		return null;
	}
	ApplicationPath ap = applicationConfig.getClass().getAnnotation(ApplicationPath.class);
	if (ap == null) {
		return null;
	}
	String applicationPath = ap.value();
	if (isBlank(applicationPath)) {
		return null;
	}
	while (applicationPath.startsWith("/")) {
		applicationPath = applicationPath.substring(1);
	}
	// support Servlet configs
	if (applicationPath.endsWith("/*")) {
		applicationPath = applicationPath.substring(0, applicationPath.length() - 2);
	}
	while (applicationPath.endsWith("/")) {
		applicationPath = applicationPath.substring(0, applicationPath.length() - 1);
	}
	if (isBlank(applicationPath)) {
		return null;
	}
	return applicationPath;
}
 

@Produces
public ServletDescriptor jerseyServlet() {
    String urlPattern = restServerConfiguration.getRestServletMapping();
    if (!applicationInstance.isUnsatisfied() && !applicationInstance.isAmbiguous()) {
        ApplicationPath annotation = ClassUtils.getAnnotation(applicationInstance.get().getClass(), ApplicationPath.class);
        if(annotation != null) {
            String path = annotation.value();
            urlPattern = path.endsWith("/") ? path + "*" : path + "/*";
        }
    }
    return new ServletDescriptor(SERVLET_NAME, null, new String[] { urlPattern }, 1, null, true, ServletContainer.class);
}
 

@Produces
public ServletDescriptor resteasyServlet() {
    String path = restServerConfiguration.getRestServerUri();
    if( !(applicationInstance.isUnsatisfied() || applicationInstance.isAmbiguous())) {
        ApplicationPath appPath = ClassUtils.getAnnotation(applicationInstance.get().getClass(), ApplicationPath.class);
        if(appPath != null) {
            path = appPath.value();
        }
    }
    String pattern = path.endsWith("/") ? path + "*" : path + "/*";
    WebInitParam param = new WebParam("resteasy.servlet.mapping.prefix", path);
    return new ServletDescriptor("ResteasyServlet",new String[]{pattern}, new String[]{pattern},
            1,new WebInitParam[]{param},true,HttpServlet30Dispatcher.class);
}
 

private static String locateApplicationPath(Class<?> clazz) {
    String resourcePackage = clazz.getPackage().getName();

    // If the rest client directly extends Application, look for ApplicationPath on it
    if (AnnotationSupport.isAnnotated(clazz, ApplicationPath.class))
        return AnnotationSupport.findAnnotation(clazz, ApplicationPath.class).get().value();

    // First check for a javax.ws.rs.core.Application in the same package as the resource
    List<Class<?>> appClasses = ReflectionSupport.findAllClassesInPackage(resourcePackage,
                                                                          c -> Application.class.isAssignableFrom(c) &&
                                                                               AnnotationSupport.isAnnotated(c, ApplicationPath.class),
                                                                          n -> true);
    if (appClasses.size() == 0) {
        LOG.debug("no classes implementing Application found in pkg: " + resourcePackage);
        // If not found, check under the 3rd package, so com.foo.bar.*
        // Classpath scanning can be expensive, so we jump straight to the 3rd package from root instead
        // of recursing up one package at a time and scanning the entire CP for each step
        String[] pkgs = resourcePackage.split("\\.");
        if (pkgs.length > 3) {
            String checkPkg = pkgs[0] + '.' + pkgs[1] + '.' + pkgs[2];
            LOG.debug("checking in pkg: " + checkPkg);
            appClasses = ReflectionSupport.findAllClassesInPackage(checkPkg,
                                                                   c -> Application.class.isAssignableFrom(c) &&
                                                                        AnnotationSupport.isAnnotated(c, ApplicationPath.class),
                                                                   n -> true);
        }
    }

    if (appClasses.size() == 0) {
        LOG.info("No classes implementing 'javax.ws.rs.core.Application' found on classpath to set as context root for " + clazz +
                 ". Defaulting context root to '/'");
        return "";
    }

    Class<?> selectedClass = appClasses.stream()
                    .sorted((c1, c2) -> c1.getName().compareTo(c2.getName()))
                    .findFirst()
                    .get();
    ApplicationPath appPath = AnnotationSupport.findAnnotation(selectedClass, ApplicationPath.class).get();
    if (appClasses.size() > 1) {
        LOG.warn("Found multiple classes implementing 'javax.ws.rs.core.Application' on classpath: " + appClasses +
                 ". Setting context root to the first class discovered (" + selectedClass.getCanonicalName() + ") with path: " +
                 appPath.value());
    }
    LOG.debug("Using ApplicationPath of '" + appPath.value() + "'");
    return appPath.value();
}
 

@SuppressWarnings("unchecked")
public static JAXRSServerFactoryBean createApplication(Application app,
                                                       boolean ignoreAppPath,
                                                       boolean staticSubresourceResolution,
                                                       boolean useSingletonResourceProvider,
                                                       Bus bus) {

    Set<Object> singletons = app.getSingletons();
    verifySingletons(singletons);

    List<Class<?>> resourceClasses = new ArrayList<>();
    List<Object> providers = new ArrayList<>();
    List<Feature> features = new ArrayList<>();
    Map<Class<?>, ResourceProvider> map = new HashMap<>();

    // Note, app.getClasses() returns a list of per-request classes
    // or singleton provider classes
    for (Class<?> cls : app.getClasses()) {
        if (isValidApplicationClass(cls, singletons)) {
            if (isValidProvider(cls)) {
                providers.add(createProviderInstance(cls));
            } else if (Feature.class.isAssignableFrom(cls)) {
                features.add(createFeatureInstance((Class<? extends Feature>) cls));
            } else {
                resourceClasses.add(cls);
                if (useSingletonResourceProvider) {
                    map.put(cls, new SingletonResourceProvider(createProviderInstance(cls)));
                } else {
                    map.put(cls, new PerRequestResourceProvider(cls));
                }
            }
        }
    }

    // we can get either a provider or resource class here
    for (Object o : singletons) {
        if (isValidProvider(o.getClass())) {
            providers.add(o);
        } else if (o instanceof Feature) {
            features.add((Feature) o);
        } else {
            resourceClasses.add(o.getClass());
            map.put(o.getClass(), new SingletonResourceProvider(o));
        }
    }

    JAXRSServerFactoryBean bean = new JAXRSServerFactoryBean();
    if (bus != null) {
        bean.setBus(bus);
    }

    String address = "/";
    if (!ignoreAppPath) {
        ApplicationPath appPath = locateApplicationPath(app.getClass());
        if (appPath != null) {
            address = appPath.value();
        }
    }
    if (!address.startsWith("/")) {
        address = "/" + address;
    }
    bean.setAddress(address);
    bean.setStaticSubresourceResolution(staticSubresourceResolution);
    bean.setResourceClasses(resourceClasses);
    bean.setProviders(providers);
    bean.getFeatures().addAll(features);
    for (Map.Entry<Class<?>, ResourceProvider> entry : map.entrySet()) {
        bean.setResourceProvider(entry.getKey(), entry.getValue());
    }
    Map<String, Object> appProps = app.getProperties();
    if (appProps != null) {
        bean.getProperties(true).putAll(appProps);
    }
    bean.setApplication(app);
    return bean;
}
 

private static String appPrefix(final WebAppInfo info, final Class<?> appClazz) {
    StringBuilder builder = null;

    // no annotation, try servlets
    for (final ServletInfo s : info.servlets) {
        if (s.mappings.isEmpty()) {
            continue;
        }

        String mapping = null;

        final String name = appClazz.getName();
        if (name.equals(s.servletClass) || name.equals(s.servletName) || "javax.ws.rs.core.Application ".equals(s.servletName)) {
            mapping = s.mappings.iterator().next();
        } else {
            for (final ParamValueInfo pvi : s.initParams) {
                if ("javax.ws.rs.Application".equals(pvi.name) || Application.class.getName().equals(pvi.name)) {
                    mapping = s.mappings.iterator().next();
                    break;
                }
            }
        }

        if (mapping != null) {
            if (mapping.endsWith("/*")) {
                mapping = mapping.substring(0, mapping.length() - 2);
            }
            if (mapping.startsWith("/")) {
                mapping = mapping.substring(1);
            }

            builder = new StringBuilder();
            builder.append(mapping);
            break;
        }
    }
    if (builder != null) { // https://issues.apache.org/jira/browse/CXF-5702
        return builder.toString();
    }

    // annotation
    final ApplicationPath path = appClazz.getAnnotation(ApplicationPath.class);
    if (path != null) {
        String appPath = path.value();
        if (appPath.endsWith("*")) {
            appPath = appPath.substring(0, appPath.length() - 1);
        }

        builder = new StringBuilder();
        if (appPath.startsWith("/")) {
            builder.append(appPath.substring(1));
        } else {
            builder.append(appPath);
        }
    }

    if (builder == null) {
        return null;
    }
    return builder.toString();
}