Example usage for java.lang Class getConstructor

Introduction

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

Prototype

@CallerSensitive
public Constructor<T> getConstructor(Class<?>... parameterTypes)
        throws NoSuchMethodException, SecurityException

Source Link

Document

Returns a Constructor object that reflects the specified public constructor of the class represented by this Class object.

Usage

From source file:com.xpn.xwiki.plugin.charts.plots.LinePlotFactory.java

public Plot create(DataSource dataSource, ChartParams params) throws GenerateException, DataSourceException {
    Class rendererClass = params.getClass(ChartParams.RENDERER);
    if (rendererClass == null || XYItemRenderer.class.isAssignableFrom(rendererClass)) {
        XYItemRenderer renderer;/*from   ww  w .j a  v a2s  .  c  om*/
        if (rendererClass != null) {
            try {
                Constructor ctor = rendererClass.getConstructor(new Class[] {});
                renderer = (XYItemRenderer) ctor.newInstance(new Object[] {});
            } catch (Throwable e) {
                throw new GenerateException(e);
            }
        } else {
            renderer = new XYLineAndShapeRenderer();
        }
        ChartCustomizer.customizeXYItemRenderer(renderer, params);

        return XYPlotFactory.getInstance().create(dataSource, renderer, params);
    } else if (CategoryItemRenderer.class.isAssignableFrom(rendererClass)) {
        CategoryItemRenderer renderer;
        if (rendererClass != null) {
            try {
                Constructor ctor = rendererClass.getConstructor(new Class[] {});
                renderer = (CategoryItemRenderer) ctor.newInstance(new Object[] {});
            } catch (Throwable e) {
                throw new GenerateException(e);
            }
        } else {
            renderer = new LineAndShapeRenderer();
        }
        ChartCustomizer.customizeCategoryItemRenderer(renderer, params);

        return CategoryPlotFactory.getInstance().create(dataSource, renderer, params);
    } else {
        throw new GenerateException("Incompatible renderer class: " + rendererClass);
    }
}

From source file:com.adaptris.core.management.ManagementComponentFactory.java

private Object resolve(final String name, BootstrapProperties bootstrapProperties) throws Exception {
    final ClassLoader originalContectClassLoader = Thread.currentThread().getContextClassLoader();
    ClassLoader classLoader = getClass().getClassLoader();
    try (final InputStream in = classLoader.getResourceAsStream(RESOURCE_PATH + name)) {
        if (in != null) {
            final Properties p = new Properties();
            p.load(in);//ww  w  . j ava 2  s  . c  om

            final String classloaderProperty = p.getProperty(CLASSLOADER_KEY);
            if (classloaderProperty != null) {
                log.debug("Using custom class loader " + classloaderProperty);
                final Class<ClassLoaderFactory> classLoaderFactoryClass = (Class<ClassLoaderFactory>) Class
                        .forName(classloaderProperty);
                final Constructor<ClassLoaderFactory> constructor = classLoaderFactoryClass
                        .getConstructor(BootstrapProperties.class);
                final ClassLoaderFactory classLoaderFactory = constructor.newInstance(bootstrapProperties);
                classLoader = classLoaderFactory.create(classLoader);
                Thread.currentThread().setContextClassLoader(classLoader);
            }
            final Object component = Class.forName(p.getProperty(PROPERTY_KEY), true, classLoader)
                    .newInstance();
            if (classloaderProperty != null) {
                invokeMethod(component, "setClassLoader", new Class[] { ClassLoader.class },
                        new ClassLoader[] { classLoader });
            }
            return component;
        }
        return Class.forName(name).newInstance();
    } finally {
        Thread.currentThread().setContextClassLoader(originalContectClassLoader);
    }
}

From source file:info.magnolia.module.admininterface.DialogHandlerManager.java

protected DialogMVCHandler instantiateHandler(String name, HttpServletRequest request,
        HttpServletResponse response, Object[] handlerConfig) {

    try {//w  ww . java2 s .  c o m

        Class dialogHandlerClass = (Class) handlerConfig[0];
        Content configNode = (Content) handlerConfig[1];
        if (configNode != null) {
            try {
                Constructor constructor = dialogHandlerClass.getConstructor(new Class[] { String.class,
                        HttpServletRequest.class, HttpServletResponse.class, Content.class });
                return (DialogMVCHandler) constructor
                        .newInstance(new Object[] { name, request, response, configNode });
            } catch (NoSuchMethodException e) {
                Constructor constructor = dialogHandlerClass.getConstructor(
                        new Class[] { String.class, HttpServletRequest.class, HttpServletResponse.class });
                return (DialogMVCHandler) constructor.newInstance(new Object[] { name, request, response });
            }
        }

        Constructor constructor = dialogHandlerClass.getConstructor(
                new Class[] { String.class, HttpServletRequest.class, HttpServletResponse.class });
        return (DialogMVCHandler) constructor.newInstance(new Object[] { name, request, response });
    } catch (Exception e) {
        throw new InvalidDialogHandlerException(name, e);
    }
}