Example usage for java.lang ClassLoader loadClass

List of usage examples for java.lang ClassLoader loadClass

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Introduction

In this page you can find the example usage for java.lang ClassLoader loadClass.

Prototype

public Class<?> loadClass(String name) throws ClassNotFoundException

Source Link

Document

Loads the class with the specified binary name.

Usage

From source file:org.codehaus.grepo.core.config.GenericRepositoryScanBeanDefinitionParser.java

/**
 * @param className The class name.//from   w w  w  . j  a v a2s  .c  o  m
 * @param strategyType The strategy type.
 * @param classLoader The class loader.
 * @return Returns the newly created instance.
 */
@SuppressWarnings("unchecked")
private Object instantiateUserDefinedStrategy(String className, Class strategyType, ClassLoader classLoader) {
    Object result = null;
    try {
        result = classLoader.loadClass(className).newInstance();
    } catch (ClassNotFoundException ex) {
        throw new IllegalArgumentException(
                "Class [" + className + "] for strategy [" + strategyType.getName() + "] not found", ex);
    } catch (Exception ex) {
        throw new IllegalArgumentException("Unable to instantiate class [" + className + "] for strategy ["
                + strategyType.getName() + "]. A zero-argument constructor is required", ex);
    }

    if (!strategyType.isAssignableFrom(result.getClass())) {
        throw new IllegalArgumentException("Provided class name must be an implementation of " + strategyType);
    }
    return result;
}

From source file:gridool.GridServer.java

@SuppressWarnings("unchecked")
@Override//from w  ww.j ava  2 s.c o  m
public <A extends Serializable, R extends Serializable> R execute(GridJobDesc jobDesc, A arg)
        throws RemoteException {
    String jobClassName = jobDesc.getJobClass();
    String deployGroup = jobDesc.getDeploymentGroup();

    ClassLoader cl = registry.getDeploymentGroupClassLoader(deployGroup);
    final Class<? extends GridJob<A, R>> jobClass;
    try {
        jobClass = (Class<? extends GridJob<A, R>>) cl.loadClass(jobClassName);
    } catch (ClassNotFoundException e) {
        throw new RemoteException("Class not found: " + jobClassName, e);
    }
    return execute(jobClass, arg, deployGroup);
}

From source file:com.googlecode.jsonschema2pojo.integration.config.AnnotationStyleIT.java

@Test
@SuppressWarnings({ "rawtypes", "unchecked" })
public void annotationStyleNoneProducesNoAnnotations()
        throws ClassNotFoundException, SecurityException, NoSuchMethodException {

    ClassLoader resultsClassLoader = generateAndCompile("/schema/properties/primitiveProperties.json",
            "com.example", config("annotationStyle", "none"));

    Class generatedType = resultsClassLoader.loadClass("com.example.PrimitiveProperties");

    Method getter = generatedType.getMethod("getA");

    assertThat(generatedType.getAnnotation(JsonPropertyOrder.class), is(nullValue()));
    assertThat(generatedType.getAnnotation(JsonSerialize.class), is(nullValue()));
    assertThat(getter.getAnnotation(JsonProperty.class), is(nullValue()));

}

From source file:com.googlecode.jsonschema2pojo.integration.EnumIT.java

@Test
@SuppressWarnings("unchecked")
public void enumWithEmptyStringAsValue() throws ClassNotFoundException, NoSuchMethodException,
        IllegalAccessException, InvocationTargetException {

    ClassLoader resultsClassLoader = generateAndCompile("/schema/enum/enumWithEmptyString.json", "com.example");

    Class<Enum> emptyEnumClass = (Class<Enum>) resultsClassLoader.loadClass("com.example.EnumWithEmptyString");

    assertThat(emptyEnumClass.getEnumConstants()[0].name(), is("__EMPTY__"));

}

From source file:com.freetmp.common.util.ClassUtils.java

public static boolean isVisible(Class<?> clazz, ClassLoader classLoader) {
    if (classLoader == null) {
        return true;
    }//from www.  j a v  a  2s .com
    try {
        Class<?> actualClass = classLoader.loadClass(clazz.getName());
        return (clazz == actualClass);
        // Else: different interface class found...
    } catch (ClassNotFoundException ex) {
        // No interface class found...
        return false;
    }
}

From source file:com.googlecode.jsonschema2pojo.integration.config.AnnotationStyleIT.java

@Test
@SuppressWarnings({ "rawtypes", "unchecked" })
public void annotationStyleJacksonProducesJackson2Annotations()
        throws ClassNotFoundException, SecurityException, NoSuchMethodException {

    ClassLoader resultsClassLoader = generateAndCompile("/schema/properties/primitiveProperties.json",
            "com.example", config("annotationStyle", "jackson"));

    Class generatedType = resultsClassLoader.loadClass("com.example.PrimitiveProperties");

    Method getter = generatedType.getMethod("getA");

    assertThat(generatedType.getAnnotation(JsonPropertyOrder.class), is(notNullValue()));
    assertThat(generatedType.getAnnotation(JsonInclude.class), is(notNullValue()));
    assertThat(getter.getAnnotation(JsonProperty.class), is(notNullValue()));
}

From source file:org.apache.hadoop.gateway.dispatch.GatewayDispatchFilter.java

private <T> Class<T> loadClass(String className) throws ClassNotFoundException {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();
    if (loader == null) {
        loader = this.getClass().getClassLoader();
    }/*from w w  w  . ja  v  a 2 s  . com*/
    return (Class<T>) loader.loadClass(className);
}

From source file:biz.wolschon.finance.jgnucash.actions.SaveAsFilePluginMenuAction.java

@Override
public void actionPerformed(final ActionEvent e) {
    try {//from ww  w .ja va  2  s  . c om

        // Activate plug-in that declares extension.
        myJGnucashEditor.getPluginManager().activatePlugin(ext.getDeclaringPluginDescriptor().getId());
        // Get plug-in class loader.
        ClassLoader classLoader = myJGnucashEditor.getPluginManager()
                .getPluginClassLoader(ext.getDeclaringPluginDescriptor());
        // Load Tool class.
        Class toolCls = classLoader.loadClass(ext.getParameter("class").valueAsString());
        // Create Tool instance.
        Object o = toolCls.newInstance();
        if (!(o instanceof DataSourcePlugin)) {
            LOGGER.error("Plugin '" + pluginName + "' does not implement DataSourcePlugin-interface.");
            JOptionPane.showMessageDialog(myJGnucashEditor, "Error",
                    "Plugin '" + pluginName + "' does not implement DataSourcePlugin-interface.",
                    JOptionPane.ERROR_MESSAGE);
            return;

        }
        DataSourcePlugin importer = (DataSourcePlugin) o;
        try {
            myJGnucashEditor.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
            //workaround because of a deadlock in log4j-consoleAppender in the JPf-classloader
            Logger.getLogger("org.java.plugin.standard.StandardPluginClassLoader").removeAllAppenders();
            Logger.getLogger("org.java.plugin.standard.StandardPluginClassLoader").setLevel(Level.FATAL);
            importer.writeTo(myJGnucashEditor.getWritableModel());
        } catch (Exception e1) {
            LOGGER.error("Write via Plugin '" + pluginName + "' failed.", e1);
            JOptionPane
                    .showMessageDialog(
                            myJGnucashEditor, "Error", "Write via Plugin '" + pluginName + "' failed.\n" + "["
                                    + e1.getClass().getName() + "]: " + e1.getMessage(),
                            JOptionPane.ERROR_MESSAGE);
        } finally {
            myJGnucashEditor.setCursor(Cursor.getDefaultCursor());
        }
    } catch (Exception e1) {
        LOGGER.error("Could not activate requested Writer-plugin '" + pluginName + "'.", e1);
        JOptionPane
                .showMessageDialog(
                        myJGnucashEditor, "Error", "Could not activate requested Writer-plugin '" + pluginName
                                + "'.\n" + "[" + e1.getClass().getName() + "]: " + e1.getMessage(),
                        JOptionPane.ERROR_MESSAGE);
    }
}

From source file:com.citytechinc.cq.component.maven.util.ComponentMojoUtil.java

/**
 * Constructs a list of widget configurations based on the information
 * provided by classes annotated as Widgets.
 * //from   w  w w  .ja  v a  2s .c o  m
 * @param classPool
 * @param classLoader
 * @param reflections
 * @return The constructed widget configurations
 * @throws ClassNotFoundException
 * @throws NotFoundException
 * @throws MalformedURLException
 */
public static List<WidgetConfigHolder> getAllWidgetAnnotations(ClassPool classPool, ClassLoader classLoader,
        Reflections reflections) throws ClassNotFoundException, NotFoundException, MalformedURLException {
    List<WidgetConfigHolder> builtInWidgets = new ArrayList<WidgetConfigHolder>();

    for (Class<?> c : reflections.getTypesAnnotatedWith(Widget.class)) {
        CtClass clazz = classPool.getCtClass(c.getName());
        Widget widgetAnnotation = (Widget) clazz.getAnnotation(Widget.class);

        Class<? extends Annotation> annotationClass = widgetAnnotation.annotationClass();

        Class<? extends WidgetMaker> makerClass = widgetAnnotation.makerClass();
        Class<? extends AbstractWidget> widgetClass = classLoader.loadClass(clazz.getName())
                .asSubclass(AbstractWidget.class);
        WidgetConfigHolder widgetConfig = new WidgetConfigHolder(annotationClass, widgetClass, makerClass,
                widgetAnnotation.xtype(), widgetAnnotation.ranking());

        builtInWidgets.add(widgetConfig);

    }
    return builtInWidgets;
}

From source file:biz.wolschon.finance.jgnucash.actions.OpenFilePluginMenuAction.java

@Override
public void actionPerformed(final ActionEvent e) {
    try {//ww  w  .ja va 2 s  .co m

        // Activate plug-in that declares extension.
        myJGnucashEditor.getPluginManager().activatePlugin(ext.getDeclaringPluginDescriptor().getId());
        // Get plug-in class loader.
        ClassLoader classLoader = myJGnucashEditor.getPluginManager()
                .getPluginClassLoader(ext.getDeclaringPluginDescriptor());
        // Load Tool class.
        Class toolCls = classLoader.loadClass(ext.getParameter("class").valueAsString());
        // Create Tool instance.
        Object o = toolCls.newInstance();
        if (!(o instanceof DataSourcePlugin)) {
            LOGGER.error("Plugin '" + pluginName + "' does not implement DataSourcePlugin-interface.");
            JOptionPane.showMessageDialog(myJGnucashEditor, "Error",
                    "Plugin '" + pluginName + "' does not implement DataSourcePlugin-interface.",
                    JOptionPane.ERROR_MESSAGE);
            return;

        }
        DataSourcePlugin importer = (DataSourcePlugin) o;
        try {
            myJGnucashEditor.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
            //workaround because of a deadlock in log4j-consoleAppender in the JPf-classloader
            Logger.getLogger("org.java.plugin.standard.StandardPluginClassLoader").removeAllAppenders();
            Logger.getLogger("org.java.plugin.standard.StandardPluginClassLoader").setLevel(Level.FATAL);
            GnucashWritableFile loadedFile = importer.loadFile();
            if (loadedFile != null) {
                myJGnucashEditor.setWritableModel(loadedFile);
            }
        } catch (Exception e1) {
            LOGGER.error("Load via Plugin '" + pluginName + "' failed.", e1);
            JOptionPane
                    .showMessageDialog(
                            myJGnucashEditor, "Error", "Load via Plugin '" + pluginName + "' failed.\n" + "["
                                    + e1.getClass().getName() + "]: " + e1.getMessage(),
                            JOptionPane.ERROR_MESSAGE);
        } finally {
            myJGnucashEditor.setCursor(Cursor.getDefaultCursor());
        }
    } catch (Exception e1) {
        LOGGER.error("Could not activate requested Loader-plugin '" + pluginName + "'.", e1);
        JOptionPane
                .showMessageDialog(
                        myJGnucashEditor, "Error", "Could not activate requested Loader-plugin '" + pluginName
                                + "'.\n" + "[" + e1.getClass().getName() + "]: " + e1.getMessage(),
                        JOptionPane.ERROR_MESSAGE);
    }
}