Examples with TemplateModel freemarker.template.TemplateModel used on opensource projects

Example 26 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class FreemarkerServlet method process.

private void process(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // Give chance to subclasses to perform preprocessing
    if (preprocessRequest(request, response)) {
        return;
    }
    if (bufferSize != null && !response.isCommitted()) {
        try {
            response.setBufferSize(bufferSize.intValue());
        } catch (IllegalStateException e) {
            LOG.debug("Can't set buffer size any more,", e);
        }
    }
    String templatePath = requestUrlToTemplatePath(request);
    if (LOG.isDebugEnabled()) {
        LOG.debug("Requested template " + StringUtil.jQuoteNoXSS(templatePath) + ".");
    }
    Locale locale = request.getLocale();
    if (locale == null || overrideResponseLocale != OverrideResponseLocale.NEVER) {
        locale = deduceLocale(templatePath, request, response);
    }
    final Template template;
    try {
        template = config.getTemplate(templatePath, locale);
    } catch (TemplateNotFoundException e) {
        if (exceptionOnMissingTemplate) {
            throw newServletExceptionWithFreeMarkerLogging("Template not found for name " + StringUtil.jQuoteNoXSS(templatePath) + ".", e);
        } else {
            if (LOG.isDebugEnabled()) {
                LOG.debug("Responding HTTP 404 \"Not found\" for missing template " + StringUtil.jQuoteNoXSS(templatePath) + ".", e);
            }
            response.sendError(HttpServletResponse.SC_NOT_FOUND, "Page template not found");
            return;
        }
    } catch (freemarker.core.ParseException e) {
        throw newServletExceptionWithFreeMarkerLogging("Parsing error with template " + StringUtil.jQuoteNoXSS(templatePath) + ".", e);
    } catch (Exception e) {
        throw newServletExceptionWithFreeMarkerLogging("Unexpected error when loading template " + StringUtil.jQuoteNoXSS(templatePath) + ".", e);
    }
    boolean tempSpecContentTypeContainsCharset = false;
    if (response.getContentType() == null || overrideResponseContentType != OverrideResponseContentType.NEVER) {
        ContentType templateSpecificContentType = getTemplateSpecificContentType(template);
        if (templateSpecificContentType != null) {
            // With ResponseCharacterEncoding.LEGACY we should append the charset, but we don't do that for b. c.
            response.setContentType(responseCharacterEncoding != ResponseCharacterEncoding.DO_NOT_SET ? templateSpecificContentType.httpHeaderValue : templateSpecificContentType.getMimeType());
            tempSpecContentTypeContainsCharset = templateSpecificContentType.containsCharset;
        } else if (response.getContentType() == null || overrideResponseContentType == OverrideResponseContentType.ALWAYS) {
            if (responseCharacterEncoding == ResponseCharacterEncoding.LEGACY && !contentType.containsCharset) {
                // In legacy mode we don't call response.setCharacterEncoding, so the charset must be set here:
                response.setContentType(contentType.httpHeaderValue + "; charset=" + getTemplateSpecificOutputEncoding(template));
            } else {
                response.setContentType(contentType.httpHeaderValue);
            }
        }
    }
    if (responseCharacterEncoding != ResponseCharacterEncoding.LEGACY && responseCharacterEncoding != ResponseCharacterEncoding.DO_NOT_SET) {
        // Using the Servlet 2.4 way of setting character encoding.
        if (responseCharacterEncoding != ResponseCharacterEncoding.FORCE_CHARSET) {
            if (!tempSpecContentTypeContainsCharset) {
                response.setCharacterEncoding(getTemplateSpecificOutputEncoding(template));
            }
        } else {
            response.setCharacterEncoding(forcedResponseCharacterEncoding.name());
        }
    }
    setBrowserCachingPolicy(response);
    ServletContext servletContext = getServletContext();
    try {
        logWarnOnObjectWrapperMismatch();
        TemplateModel model = createModel(wrapper, servletContext, request, response);
        // Give subclasses a chance to hook into preprocessing
        if (preTemplateProcess(request, response, template, model)) {
            try {
                // Process the template
                Environment env = template.createProcessingEnvironment(model, response.getWriter());
                if (responseCharacterEncoding != ResponseCharacterEncoding.LEGACY) {
                    String actualOutputCharset = response.getCharacterEncoding();
                    if (actualOutputCharset != null) {
                        env.setOutputEncoding(actualOutputCharset);
                    }
                }
                processEnvironment(env, request, response);
            } finally {
                // Give subclasses a chance to hook into postprocessing
                postTemplateProcess(request, response, template, model);
            }
        }
    } catch (TemplateException e) {
        final TemplateExceptionHandler teh = config.getTemplateExceptionHandler();
        // Ensure that debug handler responses aren't rolled back:
        if (teh == TemplateExceptionHandler.HTML_DEBUG_HANDLER || teh == TemplateExceptionHandler.DEBUG_HANDLER || teh.getClass().getName().indexOf("Debug") != -1) {
            response.flushBuffer();
        }
        throw newServletExceptionWithFreeMarkerLogging("Error executing FreeMarker template", e);
    }
}

Example 27 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class TransformBlock method accept.

@Override
TemplateElement[] accept(Environment env) throws TemplateException, IOException {
    TemplateTransformModel ttm = env.getTransform(transformExpression);
    if (ttm != null) {
        Map args;
        if (namedArgs != null && !namedArgs.isEmpty()) {
            args = new HashMap();
            for (Iterator it = namedArgs.entrySet().iterator(); it.hasNext(); ) {
                Map.Entry entry = (Map.Entry) it.next();
                String key = (String) entry.getKey();
                Expression valueExp = (Expression) entry.getValue();
                TemplateModel value = valueExp.eval(env);
                args.put(key, value);
            }
        } else {
            args = EmptyMap.instance;
        }
        env.visitAndTransform(getChildBuffer(), ttm, args);
    } else {
        TemplateModel tm = transformExpression.eval(env);
        throw new UnexpectedTypeException(transformExpression, tm, "transform", new Class[] { TemplateTransformModel.class }, env);
    }
    return null;
}

Example 28 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class UnaryPlusMinusExpression method _eval.

@Override
TemplateModel _eval(Environment env) throws TemplateException {
    TemplateNumberModel targetModel = null;
    TemplateModel tm = target.eval(env);
    try {
        targetModel = (TemplateNumberModel) tm;
    } catch (ClassCastException cce) {
        throw new NonNumericalException(target, tm, env);
    }
    if (!isMinus) {
        return targetModel;
    }
    target.assertNonNull(targetModel, env);
    Number n = targetModel.getAsNumber();
    n = ArithmeticEngine.CONSERVATIVE_ENGINE.multiply(MINUS_ONE, n);
    return new SimpleNumber(n);
}

Example 29 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class PropertySetting method accept.

@Override
TemplateElement[] accept(Environment env) throws TemplateException {
    TemplateModel mval = value.eval(env);
    String strval;
    if (mval instanceof TemplateScalarModel) {
        strval = ((TemplateScalarModel) mval).getAsString();
    } else if (mval instanceof TemplateBooleanModel) {
        strval = ((TemplateBooleanModel) mval).getAsBoolean() ? "true" : "false";
    } else if (mval instanceof TemplateNumberModel) {
        strval = ((TemplateNumberModel) mval).getAsNumber().toString();
    } else {
        strval = value.evalAndCoerceToStringOrUnsupportedMarkup(env);
    }
    env.setSetting(key, strval);
    return null;
}

Example 30 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class MethodCall method _eval.

@Override
TemplateModel _eval(Environment env) throws TemplateException {
    TemplateModel targetModel = target.eval(env);
    if (targetModel instanceof TemplateMethodModel) {
        TemplateMethodModel targetMethod = (TemplateMethodModel) targetModel;
        List argumentStrings = targetMethod instanceof TemplateMethodModelEx ? arguments.getModelList(env) : arguments.getValueList(env);
        Object result = targetMethod.exec(argumentStrings);
        return env.getObjectWrapper().wrap(result);
    } else if (targetModel instanceof Macro) {
        Macro func = (Macro) targetModel;
        env.setLastReturnValue(null);
        if (!func.isFunction()) {
            throw new _MiscTemplateException(env, "A macro cannot be called in an expression. (Functions can be.)");
        }
        Writer prevOut = env.getOut();
        try {
            env.setOut(NullWriter.INSTANCE);
            env.invoke(func, null, arguments.items, null, this);
        } catch (IOException e) {
            // Should not occur
            throw new TemplateException("Unexpected exception during function execution", e, env);
        } finally {
            env.setOut(prevOut);
        }
        return env.getLastReturnValue();
    } else {
        throw new NonMethodException(target, targetModel, env);
    }
}