Example usage for org.springframework.util ObjectUtils isEmpty

Introduction

In this page you can find the example usage for org.springframework.util ObjectUtils isEmpty.

Prototype

@SuppressWarnings("rawtypes")
public static boolean isEmpty(@Nullable Object obj) 

Source Link

Document

Determine whether the given object is empty.

Usage

From source file:org.springframework.mock.web.MockServletContext.java

@Override
@Nullable/*from   w w w  .  j a v a 2s .  c om*/
public Set<String> getResourcePaths(String path) {
    String actualPath = (path.endsWith("/") ? path : path + "/");
    Resource resource = this.resourceLoader.getResource(getResourceLocation(actualPath));
    try {
        File file = resource.getFile();
        String[] fileList = file.list();
        if (ObjectUtils.isEmpty(fileList)) {
            return null;
        }
        Set<String> resourcePaths = new LinkedHashSet<>(fileList.length);
        for (String fileEntry : fileList) {
            String resultPath = actualPath + fileEntry;
            if (resource.createRelative(fileEntry).getFile().isDirectory()) {
                resultPath += "/";
            }
            resourcePaths.add(resultPath);
        }
        return resourcePaths;
    } catch (IOException ex) {
        logger.warn("Couldn't get resource paths for " + resource, ex);
        return null;
    }
}

---

From source file:org.springframework.osgi.extender.internal.blueprint.activator.support.BlueprintConfigurationScanner.java

public String[] getConfigurations(Bundle bundle) {
    String bundleName = OsgiStringUtils.nullSafeName(bundle);

    boolean trace = log.isTraceEnabled();
    boolean debug = log.isDebugEnabled();

    if (debug)//  w w w  . j a  va  2s  . com
        log.debug("Scanning bundle " + bundleName + " for blueprint configurations...");

    String[] locations = BlueprintConfigUtils.getBlueprintHeaderLocations(bundle.getHeaders());

    // if no location is specified in the header, try the defaults
    if (locations == null) {
        if (trace) {
            log.trace("Bundle " + bundleName + " has no declared locations; trying default " + DEFAULT_CONFIG);
        }
        locations = new String[] { DEFAULT_CONFIG };
    } else {
        // check whether the header is empty
        if (ObjectUtils.isEmpty(locations)) {
            log.info("Bundle " + bundleName + " has an empty blueprint header - ignoring bundle...");
            return new String[0];
        }
    }

    String[] configs = findValidBlueprintConfigs(bundle, locations);
    if (debug)
        log.debug(
                "Discovered in bundle" + bundleName + " blueprint configurations=" + Arrays.toString(configs));
    return configs;
}

---

From source file:org.springframework.osgi.extender.internal.dependencies.shutdown.ShutdownSorter.java

private static List<Bundle> unusedBundles(Collection<Bundle> unsorted) {
    List<Bundle> unused = new ArrayList<Bundle>();

    boolean trace = log.isTraceEnabled();

    for (Bundle bundle : unsorted) {
        String bundleToString = null;
        if (trace) {
            bundleToString = OsgiStringUtils.nullSafeSymbolicName(bundle);
        }//from   ww w.ja  v  a  2  s .c om
        ServiceReference[] services = bundle.getRegisteredServices();
        if (ObjectUtils.isEmpty(services)) {
            if (trace) {
                log.trace("Bundle " + bundleToString + " has no registered services; added for shutdown");
            }
            unused.add(bundle);
        } else {
            boolean unusedBundle = true;
            for (ServiceReference serviceReference : services) {
                Bundle[] usingBundles = serviceReference.getUsingBundles();
                if (!ObjectUtils.isEmpty(usingBundles)) {
                    if (trace)
                        log.trace("Bundle " + bundleToString
                                + " has registered services in use; postponing shutdown. The using bundles are "
                                + Arrays.toString(usingBundles));
                    unusedBundle = false;
                    break;
                }

            }
            if (unusedBundle) {
                if (trace) {
                    log.trace(
                            "Bundle " + bundleToString + " has unused registered services; added for shutdown");
                }
                unused.add(bundle);
            }
        }
    }

    Collections.sort(unused, ReverseBundleIdSorter.INSTANCE);

    return unused;
}

---

From source file:org.springframework.osgi.extender.internal.dependencies.startup.MandatoryImporterDependencyFactory.java

private Filter createFilter(String[] intfs, String serviceBeanName, String filter) {
    String filterWithClasses = (!ObjectUtils.isEmpty(intfs) ? OsgiFilterUtils.unifyFilter(intfs, filter)
            : filter);//from   w w  w  . j  av a  2s  .  c o m

    // add the serviceBeanName/Blueprint component name constraint
    String nameFilter;
    if (StringUtils.hasText(serviceBeanName)) {
        StringBuilder nsFilter = new StringBuilder("(|(");
        nsFilter.append(OsgiServicePropertiesResolver.BEAN_NAME_PROPERTY_KEY);
        nsFilter.append("=");
        nsFilter.append(serviceBeanName);
        nsFilter.append(")(");
        nsFilter.append(OsgiServicePropertiesResolver.BLUEPRINT_COMP_NAME);
        nsFilter.append("=");
        nsFilter.append(serviceBeanName);
        nsFilter.append("))");
        nameFilter = nsFilter.toString();
    } else {
        nameFilter = null;
    }

    String filterWithServiceBeanName = filterWithClasses;
    if (nameFilter != null) {
        StringBuilder finalFilter = new StringBuilder();
        finalFilter.append("(&");
        finalFilter.append(filterWithClasses);
        finalFilter.append(nameFilter);
        finalFilter.append(")");
        filterWithServiceBeanName = finalFilter.toString();
    }

    return OsgiFilterUtils.createFilter(filterWithServiceBeanName);
}

---

From source file:org.springframework.osgi.service.importer.support.AbstractOsgiServiceImportFactoryBean.java

/**
 * Assembles the configuration properties into one unified OSGi filter. Note that this implementation creates the
 * filter on the first call and caches it afterwards.
 * /*w  w w .jav a  2  s .co  m*/
 * @return unified filter based on this factory bean configuration
 */
public Filter getUnifiedFilter() {
    if (unifiedFilter != null) {
        return unifiedFilter;
    }

    String filterWithClasses = (!ObjectUtils.isEmpty(interfaces)
            ? OsgiFilterUtils.unifyFilter(interfaces, filter)
            : filter);

    boolean trace = log.isTraceEnabled();
    if (trace)
        log.trace("Unified classes=" + ObjectUtils.nullSafeToString(interfaces) + " and filter=[" + filter
                + "]  in=[" + filterWithClasses + "]");

    // add the serviceBeanName/Blueprint component name constraint
    String nameFilter;
    if (StringUtils.hasText(serviceBeanName)) {
        StringBuilder nsFilter = new StringBuilder("(|(");
        nsFilter.append(OsgiServicePropertiesResolver.BEAN_NAME_PROPERTY_KEY);
        nsFilter.append("=");
        nsFilter.append(serviceBeanName);
        nsFilter.append(")(");
        nsFilter.append(OsgiServicePropertiesResolver.BLUEPRINT_COMP_NAME);
        nsFilter.append("=");
        nsFilter.append(serviceBeanName);
        nsFilter.append("))");
        nameFilter = nsFilter.toString();
    } else {
        nameFilter = null;
    }

    String filterWithServiceBeanName = filterWithClasses;
    if (nameFilter != null) {
        StringBuilder finalFilter = new StringBuilder();
        finalFilter.append("(&");
        finalFilter.append(filterWithClasses);
        finalFilter.append(nameFilter);
        finalFilter.append(")");
        filterWithServiceBeanName = finalFilter.toString();
    }

    if (trace)
        log.trace("Unified serviceBeanName [" + ObjectUtils.nullSafeToString(serviceBeanName) + "] and filter=["
                + filterWithClasses + "]  in=[" + filterWithServiceBeanName + "]");

    // create (which implies validation) the actual filter
    unifiedFilter = OsgiFilterUtils.createFilter(filterWithServiceBeanName);

    return unifiedFilter;
}

---

From source file:org.springframework.osgi.web.deployer.internal.util.JasperUtils.java

public static URL[] createTaglibClasspathJars(Bundle bundle) {
    List urls = new ArrayList(2);
    boolean trace = log.isTraceEnabled();

    try {/* ww w. j  a v  a2 s  .c  om*/
        // create taglib jar for tlds inside the bundle classpath
        Resource[] res = getBundleTagLibs(bundle);
        if (!ObjectUtils.isEmpty(res)) {
            urls.add(createTaglibJar(res, null));
        }
        if (trace)
            log.trace("Bundle " + OsgiStringUtils.nullSafeNameAndSymName(bundle)
                    + " has the following tlds in its classpath " + ObjectUtils.nullSafeToString(res));

        // create taglib jar for tlds from imported bundles
        BundleContext ctx = OsgiBundleUtils.getBundleContext(bundle);
        Resource[] importedTLDs = getImportedBundlesTagLibs(ctx, bundle);
        if (!ObjectUtils.isEmpty(importedTLDs)) {
            urls.add(createTaglibJar(importedTLDs, null));
        }

        if (trace)
            log.trace("Bundle " + OsgiStringUtils.nullSafeNameAndSymName(bundle)
                    + " has the following tlds in its imported bundles "
                    + ObjectUtils.nullSafeToString(importedTLDs));

        return (URL[]) urls.toArray(new URL[urls.size()]);
    } catch (IOException ex) {
        throw (RuntimeException) new IllegalStateException("Cannot create taglib jars").initCause(ex);
    }
}

---

From source file:org.springframework.oxm.jaxb.Jaxb2Marshaller.java

@Override
public void afterPropertiesSet() throws Exception {
    boolean hasContextPath = StringUtils.hasLength(this.contextPath);
    boolean hasClassesToBeBound = !ObjectUtils.isEmpty(this.classesToBeBound);
    boolean hasPackagesToScan = !ObjectUtils.isEmpty(this.packagesToScan);

    if (hasContextPath && (hasClassesToBeBound || hasPackagesToScan)
            || (hasClassesToBeBound && hasPackagesToScan)) {
        throw new IllegalArgumentException(
                "Specify either 'contextPath', 'classesToBeBound', " + "or 'packagesToScan'");
    }// w ww .  ja v  a2s  .c  o  m
    if (!hasContextPath && !hasClassesToBeBound && !hasPackagesToScan) {
        throw new IllegalArgumentException(
                "Setting either 'contextPath', 'classesToBeBound', " + "or 'packagesToScan' is required");
    }
    if (!this.lazyInit) {
        getJaxbContext();
    }
    if (!ObjectUtils.isEmpty(this.schemaResources)) {
        this.schema = loadSchema(this.schemaResources, this.schemaLanguage);
    }
}

---

From source file:org.springframework.oxm.jaxb.Jaxb2Marshaller.java

/**
 * Return the JAXBContext used by this marshaller, lazily building it if necessary.
 *//*  w w  w  .  j  av  a2s.  c  om*/
public JAXBContext getJaxbContext() {
    JAXBContext context = this.jaxbContext;
    if (context != null) {
        return context;
    }
    synchronized (this.jaxbContextMonitor) {
        context = this.jaxbContext;
        if (context == null) {
            try {
                if (StringUtils.hasLength(this.contextPath)) {
                    context = createJaxbContextFromContextPath(this.contextPath);
                } else if (!ObjectUtils.isEmpty(this.classesToBeBound)) {
                    context = createJaxbContextFromClasses(this.classesToBeBound);
                } else if (!ObjectUtils.isEmpty(this.packagesToScan)) {
                    context = createJaxbContextFromPackages(this.packagesToScan);
                } else {
                    context = JAXBContext.newInstance();
                }
                this.jaxbContext = context;
            } catch (JAXBException ex) {
                throw convertJaxbException(ex);
            }
        }
        return context;
    }
}

---

From source file:org.springframework.oxm.jaxb.Jaxb2Marshaller.java

private boolean supportsInternal(Class<?> clazz, boolean checkForXmlRootElement) {
    if (checkForXmlRootElement && AnnotationUtils.findAnnotation(clazz, XmlRootElement.class) == null) {
        return false;
    }/*from  w  w w. j a  v  a2 s.c o  m*/
    if (StringUtils.hasLength(this.contextPath)) {
        String packageName = ClassUtils.getPackageName(clazz);
        String[] contextPaths = StringUtils.tokenizeToStringArray(this.contextPath, ":");
        for (String contextPath : contextPaths) {
            if (contextPath.equals(packageName)) {
                return true;
            }
        }
        return false;
    } else if (!ObjectUtils.isEmpty(this.classesToBeBound)) {
        return Arrays.asList(this.classesToBeBound).contains(clazz);
    }
    return false;
}

---

From source file:org.springframework.scheduling.backportconcurrent.ScheduledExecutorFactoryBean.java

public void afterPropertiesSet() {
    if (logger.isInfoEnabled()) {
        logger.info("Initializing ScheduledExecutorService"
                + (this.beanName != null ? " '" + this.beanName + "'" : ""));
    }//from  w w  w . java 2 s.c o m
    ScheduledExecutorService executor = createExecutor(this.poolSize, this.threadFactory,
            this.rejectedExecutionHandler);

    // Register specified ScheduledExecutorTasks, if necessary.
    if (!ObjectUtils.isEmpty(this.scheduledExecutorTasks)) {
        registerTasks(this.scheduledExecutorTasks, executor);
    }

    // Wrap executor with an unconfigurable decorator.
    this.executor = (this.exposeUnconfigurableExecutor
            ? Executors.unconfigurableScheduledExecutorService(executor)
            : executor);
}

---

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