Examples with VelocityWriter com.github.bordertech.wcomponents.velocity.VelocityWriter used on opensource projects

Example 1 with VelocityWriter

use of com.github.bordertech.wcomponents.velocity.VelocityWriter in project wcomponents by BorderTech.

the class VelocityRenderer method paintXml.

/**
 * Paints the component in XML using the Velocity Template.
 *
 * @param component the component to paint.
 * @param writer the writer to send the HTML output to.
 */
public void paintXml(final WComponent component, final Writer writer) {
    if (LOG.isDebugEnabled()) {
        LOG.debug("paintXml called for component class " + component.getClass());
    }
    String templateText = null;
    if (component instanceof AbstractWComponent) {
        AbstractWComponent abstractComp = ((AbstractWComponent) component);
        templateText = abstractComp.getTemplateMarkUp();
    }
    try {
        Map<String, WComponent> componentsByKey = new HashMap<>();
        VelocityContext context = new VelocityContext();
        fillContext(component, context, componentsByKey);
        VelocityWriter velocityWriter = new VelocityWriter(writer, componentsByKey, UIContextHolder.getCurrent());
        if (templateText != null) {
            VelocityEngine engine = VelocityEngineFactory.getVelocityEngine();
            engine.evaluate(context, velocityWriter, component.getClass().getSimpleName(), templateText);
        } else {
            Template template = getTemplate(component);
            if (template == null) {
                LOG.warn("VelocityRenderer invoked for a component with no template: " + component.getClass().getName());
            } else {
                template.merge(context, velocityWriter);
            }
        }
        velocityWriter.close();
        if (component instanceof VelocityProperties) {
            ((VelocityProperties) component).mapUsed();
        }
    } catch (ResourceNotFoundException rnfe) {
        LOG.error("Could not find template '" + url + "' for component " + component.getClass().getName(), rnfe);
    } catch (ParseErrorException pee) {
        // syntax error : problem parsing the template
        LOG.error("Parse problems", pee);
    } catch (MethodInvocationException mie) {
        // something invoked in the template
        // threw an exception
        Throwable wrapped = mie.getWrappedThrowable();
        LOG.error("Problems with velocity", mie);
        if (wrapped != null) {
            LOG.error("Wrapped exception...", wrapped);
        }
    } catch (Exception e) {
        LOG.error("Problems with velocity", e);
    }
}