Examples with ToolContext org.apache.velocity.tools.ToolContext used on opensource projects

Example 1 with ToolContext

use of org.apache.velocity.tools.ToolContext in project openmrs-core by openmrs.

the class StartupFilter method renderTemplate.

/**
 * All private attributes on this class are returned to the template via the velocity context
 * and reflection
 *
 * @param templateName the name of the velocity file to render. This name is prepended with
 *            {@link #getTemplatePrefix()}
 * @param referenceMap
 * @param httpResponse
 */
protected void renderTemplate(String templateName, Map<String, Object> referenceMap, HttpServletResponse httpResponse) throws IOException {
    // his http session) and merge that tools context with basic velocity context
    if (referenceMap == null) {
        return;
    }
    Object locale = referenceMap.get(FilterUtil.LOCALE_ATTRIBUTE);
    ToolContext velocityToolContext = getToolContext(locale != null ? locale.toString() : Context.getLocale().toString());
    VelocityContext velocityContext = new VelocityContext(velocityToolContext);
    for (Map.Entry<String, Object> entry : referenceMap.entrySet()) {
        velocityContext.put(entry.getKey(), entry.getValue());
    }
    Object model = getModel();
    // put each of the private varibles into the template for convenience
    for (Field field : model.getClass().getDeclaredFields()) {
        try {
            field.setAccessible(true);
            velocityContext.put(field.getName(), field.get(model));
        } catch (IllegalArgumentException | IllegalAccessException e) {
            log.error("Error generated while getting field value: " + field.getName(), e);
        }
    }
    String fullTemplatePath = getTemplatePrefix() + templateName;
    InputStream templateInputStream = getClass().getClassLoader().getResourceAsStream(fullTemplatePath);
    if (templateInputStream == null) {
        throw new IOException("Unable to find " + fullTemplatePath);
    }
    velocityContext.put("errors", errors);
    velocityContext.put("msgs", msgs);
    // explicitly set the content type for the response because some servlet containers are assuming text/plain
    httpResponse.setContentType("text/html");
    try {
        velocityEngine.evaluate(velocityContext, httpResponse.getWriter(), this.getClass().getName(), new InputStreamReader(templateInputStream, StandardCharsets.UTF_8));
    } catch (Exception e) {
        throw new APIException("Unable to process template: " + fullTemplatePath, e);
    }
}