Example usage for java.lang Class getClassLoader

Introduction

In this page you can find the example usage for java.lang Class getClassLoader.

Prototype

@CallerSensitive
@ForceInline 
public ClassLoader getClassLoader() 

Source Link

Document

Returns the class loader for the class.

Usage

From source file:Main.java

/**
 * Load a given resources. <p/> This method will try to load the resources
 * using the following methods (in order):
 * <ul>// www.ja  va 2s . c o m
 * <li>From Thread.currentThread().getContextClassLoader()
 * <li>From ClassLoaderUtil.class.getClassLoader()
 * <li>callingClass.getClassLoader()
 * </ul>
 * 
 * @param resourceName The name of the resource to load
 * @param callingClass The Class object of the calling object
 */
public static List<URL> getResources(String resourceName, Class callingClass) {
    List<URL> ret = new ArrayList<URL>();
    Enumeration<URL> urls = new Enumeration<URL>() {
        public boolean hasMoreElements() {
            return false;
        }

        public URL nextElement() {
            return null;
        }

    };
    try {
        urls = Thread.currentThread().getContextClassLoader().getResources(resourceName);
    } catch (IOException e) {
        //ignore
    }
    if (!urls.hasMoreElements() && resourceName.startsWith("/")) {
        //certain classloaders need it without the leading /
        try {
            urls = Thread.currentThread().getContextClassLoader().getResources(resourceName.substring(1));
        } catch (IOException e) {
            // ignore
        }
    }

    ClassLoader cluClassloader = Main.class.getClassLoader();
    if (cluClassloader == null) {
        cluClassloader = ClassLoader.getSystemClassLoader();
    }
    if (!urls.hasMoreElements()) {
        try {
            urls = cluClassloader.getResources(resourceName);
        } catch (IOException e) {
            // ignore
        }
    }
    if (!urls.hasMoreElements() && resourceName.startsWith("/")) {
        //certain classloaders need it without the leading /
        try {
            urls = cluClassloader.getResources(resourceName.substring(1));
        } catch (IOException e) {
            // ignore
        }
    }

    if (!urls.hasMoreElements()) {
        ClassLoader cl = callingClass.getClassLoader();

        if (cl != null) {
            try {
                urls = cl.getResources(resourceName);
            } catch (IOException e) {
                // ignore
            }
        }
    }

    if (!urls.hasMoreElements()) {
        URL url = callingClass.getResource(resourceName);
        if (url != null) {
            ret.add(url);
        }
    }
    while (urls.hasMoreElements()) {
        ret.add(urls.nextElement());
    }

    if (ret.isEmpty() && (resourceName != null) && (resourceName.charAt(0) != '/')) {
        return getResources('/' + resourceName, callingClass);
    }
    return ret;
}

---

From source file:dpfmanager.shell.modules.report.core.ReportGenerator.java

/**
 * Copies the HTML folder to the reports folder.
 *
 * @param name the name/* ww w. j  a v a  2  s  . c o  m*/
 */
private void copyHtmlFolder(String name) {
    // Get the target folder
    File nameFile = new File(name);
    String absolutePath = nameFile.getAbsolutePath();
    String targetPath = absolutePath.substring(0, absolutePath.lastIndexOf(File.separator));
    File target = new File(targetPath + File.separator + "html");
    if (!target.exists()) {
        target.mkdirs();
    }

    // Copy the html folder to target
    String pathStr = "./src/main/resources/html";
    Path path = Paths.get(pathStr);
    if (Files.exists(path)) {
        // Look in current dir
        File folder = new File(pathStr);
        if (folder.exists() && folder.isDirectory()) {
            try {
                copyDirectory(folder, target);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    } else {
        // Look in JAR
        CodeSource src = ReportGenerator.class.getProtectionDomain().getCodeSource();
        if (src != null) {
            String jarFolder;
            try {
                Class cls = ReportGenerator.class;
                ClassLoader cLoader = cls.getClassLoader();
                List<String> arrayFiles = new ArrayList<>();
                List<File> arrayFolders = new ArrayList<>();

                //files in js folder
                arrayFiles.add("html/js/bootstrap.min.js");
                arrayFiles.add("html/js/jquery-1.9.1.min.js");
                arrayFiles.add("html/js/jquery.flot.pie.min.js");
                arrayFiles.add("html/js/jquery.flot.min.js");

                //files in img folder
                arrayFiles.add("html/img/noise.jpg");
                arrayFiles.add("html/img/logo.png");
                arrayFiles.add("html/img/logo - copia.png");
                arrayFiles.add("html/img/check_radio_sheet.png");

                //files in fonts folder
                arrayFiles.add("html/fonts/fontawesome-webfont.woff2");
                arrayFiles.add("html/fonts/fontawesome-webfont.woff");
                arrayFiles.add("html/fonts/fontawesome-webfont.ttf");
                arrayFiles.add("html/fonts/fontawesome-webfont.svg");
                arrayFiles.add("html/fonts/fontawesome-webfont.eot");
                arrayFiles.add("html/fonts/fontello.woff2");
                arrayFiles.add("html/fonts/fontello.woff");
                arrayFiles.add("html/fonts/fontello.ttf");
                arrayFiles.add("html/fonts/fontello.svg");
                arrayFiles.add("html/fonts/fontello.eot");
                arrayFiles.add("html/fonts/FontAwesome.otf");
                arrayFiles.add("html/fonts/Roboto-Bold.ttf");

                //files in css folder
                arrayFiles.add("html/css/font-awesome.css");
                arrayFiles.add("html/css/default.css");
                arrayFiles.add("html/css/bootstrap.css");
                arrayFiles.add("html/css/fontello.css");

                arrayFolders.add(new File(targetPath + File.separator + "html/js/"));
                arrayFolders.add(new File(targetPath + File.separator + "html/img/"));
                arrayFolders.add(new File(targetPath + File.separator + "html/fonts/"));
                arrayFolders.add(new File(targetPath + File.separator + "html/css/"));

                //if originals folders not exists
                for (File item : arrayFolders) {
                    if (!item.exists()) {
                        item.mkdirs();
                    }
                }

                //copy files
                for (String filePath : arrayFiles) {
                    InputStream in = cLoader.getResourceAsStream(filePath);
                    int readBytes;
                    byte[] buffer = new byte[4096];
                    jarFolder = targetPath + File.separator;
                    File prova = new File(jarFolder + filePath);
                    if (!prova.exists()) {
                        prova.createNewFile();
                    }
                    OutputStream resStreamOut = new FileOutputStream(prova, false);
                    while ((readBytes = in.read(buffer)) > 0) {
                        resStreamOut.write(buffer, 0, readBytes);
                    }
                }

            } catch (IOException e) {
                context.send(BasicConfig.MODULE_MESSAGE, new ExceptionMessage("IOException", e));
            }
        }
    }
}

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From source file:org.apache.hadoop.hbase.ipc.ProtobufRpcEngine.java

@Override
public VersionedProtocol getProxy(Class<? extends VersionedProtocol> protocol, long clientVersion,
        InetSocketAddress addr, User ticket, Configuration conf, SocketFactory factory, int rpcTimeout)
        throws IOException {
    final Invoker invoker = new Invoker(protocol, addr, ticket, conf, factory, rpcTimeout);
    return (VersionedProtocol) Proxy.newProxyInstance(protocol.getClassLoader(), new Class[] { protocol },
            invoker);//from   www. java 2  s. com
}

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From source file:com.google.gdt.eclipse.designer.util.GwtInvocationEvaluatorInterceptor.java

/**
 * Tweaks arguments to fix know problem cases.
 *//*from w w w  .ja v a  2s  . co m*/
private void fixArguments(Class<?> clazz, Constructor<?> constructor, Object[] arguments) throws Exception {
    if (clazz.getName().equals("com.google.gwt.user.client.ui.Tree")) {
        String signature = ReflectionUtils.getConstructorSignature(constructor);
        if (signature.equals("<init>(com.google.gwt.user.client.ui.TreeImages)")) {
            if (arguments[0] == null) {
                arguments[0] = ScriptUtils.evaluate(clazz.getClassLoader(),
                        CodeUtils.getSource("import com.google.gwt.core.client.GWT;",
                                "import com.google.gwt.user.client.ui.*;", "return GWT.create(TreeImages);"));
            }
        }
    }
    // prevent "null" as "cell" in CellList
    if (clazz.getName().equals("com.google.gwt.user.cellview.client.CellList")) {
        String signature = ReflectionUtils.getConstructorSignature(constructor);
        if (signature.equals("<init>(com.google.gwt.cell.client.Cell)")) {
            if (arguments[0] == null) {
                ClassLoader classLoader = clazz.getClassLoader();
                Class<?> classTextCell = classLoader.loadClass("com.google.gwt.cell.client.TextCell");
                arguments[0] = classTextCell.newInstance();
            }
        }
    }
}

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From source file:com.streamsets.datacollector.definition.StageDefinitionExtractor.java

public List<ErrorMessage> validate(StageLibraryDefinition libraryDef, Class<? extends Stage> klass,
        Object contextMsg) {/*from  www.  j  ava 2 s  . c o m*/
    List<ErrorMessage> errors = new ArrayList<>();
    contextMsg = Utils.formatL("{} Stage='{}'", contextMsg, klass.getSimpleName());

    StageDef sDef = klass.getAnnotation(StageDef.class);
    if (sDef == null) {
        errors.add(new ErrorMessage(DefinitionError.DEF_300, contextMsg));
    } else {
        if (!sDef.icon().isEmpty()) {
            if (klass.getClassLoader().getResource(sDef.icon()) == null) {
                errors.add(new ErrorMessage(DefinitionError.DEF_311, contextMsg, sDef.icon()));
            }
        }
        StageType type = extractStageType(klass);
        if (type == null) {
            errors.add(new ErrorMessage(DefinitionError.DEF_302, contextMsg));
        }
        boolean errorStage = klass.getAnnotation(ErrorStage.class) != null;
        if (type != null && errorStage && type == StageType.SOURCE) {
            errors.add(new ErrorMessage(DefinitionError.DEF_303, contextMsg));
        }

        if (OffsetCommitTrigger.class.isAssignableFrom(klass) && type != StageType.TARGET) {
            errors.add(new ErrorMessage(DefinitionError.DEF_312, contextMsg));
        }

        HideConfigs hideConfigs = klass.getAnnotation(HideConfigs.class);

        List<String> stageGroups = getGroups(klass);

        List<ErrorMessage> configGroupErrors = ConfigGroupExtractor.get().validate(klass, contextMsg);
        errors.addAll(configGroupErrors);
        errors.addAll(ConfigGroupExtractor.get().validate(klass, contextMsg));

        List<ErrorMessage> configErrors = ConfigDefinitionExtractor.get().validate(klass, stageGroups,
                contextMsg);
        errors.addAll(configErrors);

        List<ErrorMessage> rawSourceErrors = RawSourceDefinitionExtractor.get().validate(klass, contextMsg);
        errors.addAll(rawSourceErrors);
        if (type != null && rawSourceErrors.isEmpty() && type != StageType.SOURCE) {
            if (RawSourceDefinitionExtractor.get().extract(klass, contextMsg) != null) {
                errors.add(new ErrorMessage(DefinitionError.DEF_304, contextMsg));
            }
        }

        if (!sDef.outputStreams().isEnum()) {
            errors.add(new ErrorMessage(DefinitionError.DEF_305, contextMsg,
                    sDef.outputStreams().getSimpleName()));
        }

        if (type != null && sDef.outputStreams() != StageDef.DefaultOutputStreams.class
                && type == StageType.TARGET) {
            errors.add(new ErrorMessage(DefinitionError.DEF_306, contextMsg));
        }

        boolean variableOutputStreams = StageDef.VariableOutputStreams.class
                .isAssignableFrom(sDef.outputStreams());

        List<ExecutionMode> executionModes = ImmutableList.copyOf(sDef.execution());
        if (executionModes.isEmpty()) {
            errors.add(new ErrorMessage(DefinitionError.DEF_307, contextMsg));
        }

        String outputStreamsDrivenByConfig = sDef.outputStreamsDrivenByConfig();

        if (variableOutputStreams && outputStreamsDrivenByConfig.isEmpty()) {
            errors.add(new ErrorMessage(DefinitionError.DEF_308, contextMsg));
        }

        if (configErrors.isEmpty() && configGroupErrors.isEmpty()) {
            List<ConfigDefinition> configDefs = extractConfigDefinitions(libraryDef, klass, hideConfigs,
                    contextMsg);
            ConfigGroupDefinition configGroupDef = ConfigGroupExtractor.get().extract(klass, contextMsg);
            errors.addAll(validateConfigGroups(configDefs, configGroupDef, contextMsg));
            if (variableOutputStreams) {
                boolean found = false;
                for (ConfigDefinition configDef : configDefs) {
                    if (configDef.getName().equals(outputStreamsDrivenByConfig)) {
                        found = true;
                        break;
                    }
                }
                if (!found) {
                    errors.add(
                            new ErrorMessage(DefinitionError.DEF_309, contextMsg, outputStreamsDrivenByConfig));
                }
            }
        }

    }
    return errors;
}

---

From source file:org.covito.kit.utility.ClassUtil.java

public static URL getClassLocation(final String clsName) {
    if (clsName == null) {
        return null;
    }//from w  w  w . j ava  2  s  .c o  m
    Class cls = null;
    try {
        cls = Class.forName(clsName);
    } catch (Exception e) {
        return null;
    }
    URL result = null;
    final String clsAsResource = cls.getName().replace('.', '/').concat(".class");
    final ProtectionDomain pd = cls.getProtectionDomain();
    // java.lang.Class contract does not specify if 'pd' can ever be null;
    // it is not the case for Sun's implementations, but guard against null
    // just in case:
    if (pd != null) {
        final CodeSource cs = pd.getCodeSource();
        // 'cs' can be null depending on the classloader behavior:
        if (cs != null)
            result = cs.getLocation();
        if (result != null) {
            // Convert a code source location into a full class file
            // location
            // for some common cases:
            if ("file".equals(result.getProtocol())) {
                try {
                    if (result.toExternalForm().endsWith(".jar") || result.toExternalForm().endsWith(".zip"))
                        result = new URL(
                                "jar:".concat(result.toExternalForm()).concat("!/").concat(clsAsResource));
                    else if (new File(result.getFile()).isDirectory()) {
                        result = new URL(result, clsAsResource);
                    }
                } catch (MalformedURLException ignore) {
                }
            }
        }
    }
    if (result == null) {
        // Try to find 'cls' definition as a resource; this is not
        // documentd to be legal, but Sun's implementations seem to //allow
        // this:
        final ClassLoader clsLoader = cls.getClassLoader();
        result = clsLoader != null ? clsLoader.getResource(clsAsResource)
                : ClassLoader.getSystemResource(clsAsResource);
    }
    return result;
}

---

From source file:hudson.model.Descriptor.java

protected final String getViewPage(Class<?> clazz, String pageName) {
    while (clazz != Object.class) {
        String name = clazz.getName().replace('.', '/').replace('$', '/') + "/" + pageName;
        if (clazz.getClassLoader().getResource(name) != null)
            return '/' + name;
        clazz = clazz.getSuperclass();// w  ww . ja v  a 2 s  .  c om
    }
    // We didn't find the configuration page.
    // Either this is non-fatal, in which case it doesn't matter what string we return so long as
    // it doesn't exist.
    // Or this error is fatal, in which case we want the developer to see what page he's missing.
    // so we put the page name.
    return pageName;
}

---

From source file:com.github.hrpc.rpc.WritableRpcEngine.java

/** Construct a client-side proxy object that implements the named protocol,
 * talking to a server at the named address.
 * @param <T>*//*from  w  w w  .j ava  2  s  .c  om*/
@Override
@SuppressWarnings("unchecked")
public <T> ProtocolProxy<T> getProxy(Class<T> protocol, long clientVersion, InetSocketAddress addr, Option conf,
        SocketFactory factory, int rpcTimeout, RetryPolicy connectionRetryPolicy) throws IOException {

    if (connectionRetryPolicy != null) {
        throw new UnsupportedOperationException(
                "Not supported: connectionRetryPolicy=" + connectionRetryPolicy);
    }

    T proxy = (T) Proxy.newProxyInstance(protocol.getClassLoader(), new Class[] { protocol },
            new Invoker(protocol, addr, conf, factory, rpcTimeout));
    return new ProtocolProxy<T>(protocol, proxy);
}

---

From source file:org.blocks4j.feature.toggle.factory.FeatureToggleFactory.java

private <T> T createFeatureProxy(String featureName, Class<? super T> commonInterface, T featureOn,
        T featureOff) {// w  w  w . ja va  2  s .  co m
    this.validateParams(featureName, commonInterface, featureOn, featureOff);
    Feature<T> feature;

    if (this.allowProbabilisticFeatures) {
        feature = new ProbabilisticFeature<T>();
    } else {
        feature = new Feature<T>();
    }

    feature.setConfig(this.config);
    feature.setCommonsInterface(commonInterface);
    feature.setOn(featureOn);
    feature.setOff(featureOff);
    feature.setName(featureName);
    feature.init();

    @SuppressWarnings("unchecked")
    T proxy = (T) Proxy.newProxyInstance(commonInterface.getClassLoader(), new Class[] { commonInterface },
            feature);

    LOGGER.info(String.format("Feature [%s] initialized , Object for ON is [%s] and Object for OFF is [%s]",
            featureName, featureOn.getClass().getSimpleName(), featureOff.getClass().getSimpleName()));
    toggleList.add(feature);
    return proxy;
}

---

From source file:hudson.model.Descriptor.java

private InputStream getHelpStream(Class c, String suffix) {
    Locale locale = Stapler.getCurrentRequest().getLocale();
    String base = c.getName().replace('.', '/') + "/help" + suffix;

    ClassLoader cl = c.getClassLoader();
    if (cl == null)
        return null;

    InputStream in;//from w ww  .  j a  va2s .  co m
    in = cl.getResourceAsStream(base + '_' + locale.getLanguage() + '_' + locale.getCountry() + '_'
            + locale.getVariant() + ".html");
    if (in != null)
        return in;
    in = cl.getResourceAsStream(base + '_' + locale.getLanguage() + '_' + locale.getCountry() + ".html");
    if (in != null)
        return in;
    in = cl.getResourceAsStream(base + '_' + locale.getLanguage() + ".html");
    if (in != null)
        return in;

    // default
    return cl.getResourceAsStream(base + ".html");
}

---

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