Java Code Examples for org.thymeleaf.context.ITemplateContext#getVariable()

public static Page<?> findPage(final ITemplateContext context) {
    // 1. Get Page object from local variables (defined with sd:page-object)
    // 2. Search Page using ${page} expression
    // 3. Search Page object as request attribute

    final Object pageFromLocalVariable = context.getVariable(Keys.PAGE_VARIABLE_KEY);
    if (isPageInstance(pageFromLocalVariable)) {
        return (Page<?>) pageFromLocalVariable;
    }

    // Check if not null and Page instance available with ${page} expression
    final IEngineConfiguration configuration = context.getConfiguration();
    final IStandardExpressionParser parser = StandardExpressions.getExpressionParser(configuration);
    final IStandardExpression expression = parser.parseExpression(context, Keys.PAGE_EXPRESSION);
    final Object page = expression.execute(context);
    if (isPageInstance(page)) {
        return (Page<?>) page;
    }

    // Search for Page object, and only one instance, as request attribute
    if (context instanceof IWebContext) {
        HttpServletRequest request = ((IWebContext) context).getRequest();
        Enumeration<String> attrNames = request.getAttributeNames();
        Page<?> pageOnRequest = null;
        while (attrNames.hasMoreElements()) {
            String attrName = (String) attrNames.nextElement();
            Object attr = request.getAttribute(attrName);
            if (isPageInstance(attr)) {
                if (pageOnRequest != null) {
                    throw new InvalidObjectParameterException("More than one Page object found on request!");
                }

                pageOnRequest = (Page<?>) attr;
            }
        }

        if (pageOnRequest != null) {
            return pageOnRequest;
        }
    }

    throw new InvalidObjectParameterException("Invalid or not present Page object found on request!");
}
 

private static String buildBaseUrl(final ITemplateContext context, Collection<String> excludeParams) {
    // URL defined with pagination-url tag
    final String url = (String) context.getVariable(Keys.PAGINATION_URL_KEY);

    if (url == null && context instanceof IWebContext) {
        // Creates url from actual request URI and parameters
        final StringBuilder builder = new StringBuilder();
        final IWebContext webContext = (IWebContext) context;
        final HttpServletRequest request = webContext.getRequest();

        // URL base path from request
        builder.append(request.getRequestURI());

        Map<String, String[]> params = request.getParameterMap();
        Set<Entry<String, String[]>> entries = params.entrySet();
        boolean firstParam = true;
        for (Entry<String, String[]> param : entries) {
            // Append params not excluded to basePath
            String name = param.getKey();
            if (!excludeParams.contains(name)) {
                if (firstParam) {
                    builder.append(Q_MARK);
                    firstParam = false;
                } else {
                    builder.append(AND);
                }

                // Iterate over all values to create multiple values per
                // parameter
                String[] values = param.getValue();
                Collection<String> paramValues = Arrays.asList(values);
                Iterator<String> it = paramValues.iterator();
                while (it.hasNext()) {
                    String value = it.next();
                    builder.append(name).append(EQ).append(value);
                    if (it.hasNext()) {
                        builder.append(AND);
                    }
                }
            }
        }

        // Escape to HTML content
        return HtmlEscape.escapeHtml4Xml(builder.toString());
    }

    return url == null ? EMPTY : url;
}
 

private static String getParamPrefix(final ITemplateContext context) {
    final String prefix = (String) context.getVariable(Keys.PAGINATION_QUALIFIER_PREFIX);

    return prefix == null ? EMPTY : prefix.concat("_");
}
 

private String createPageLinks(final Page<?> page, final ITemplateContext context) {
    if( page.getTotalElements()==0 ){
        return Strings.EMPTY;
    }
    
    int pageSplit = DEFAULT_PAGE_SPLIT;
    Object paramValue = context.getVariable(Keys.PAGINATION_SPLIT_KEY);
    if (paramValue != null) {
        pageSplit = (Integer) paramValue;
    }

    int firstPage = 0;
    int latestPage = page.getTotalPages();
    int currentPage = page.getNumber();
    if (latestPage >= pageSplit) {
        // Total pages > than split value, create links to split value
        int pageDiff = latestPage - currentPage;
        if (currentPage == 0) {
            // From first page to split value
            latestPage = pageSplit;
        } else if (pageDiff < pageSplit) {
            // From split value to latest page
            firstPage = currentPage - (pageSplit - pageDiff);
        } else {
            // From current page -1 to split value
            firstPage = currentPage - 1;
            latestPage = currentPage + pageSplit - 1;
        }
    }

    StringBuilder builder = new StringBuilder();
    // Page links
    for (int i = firstPage; i < latestPage; i++) {
        int pageNumber = i + 1;
        String link = PageUtils.createPageUrl(context, i);
        boolean isCurrentPage = i == currentPage;
        Locale locale = context.getLocale();
        String li = isCurrentPage ? getLink(pageNumber, locale) : getLink(pageNumber, link, locale);
        builder.append(li);
    }

    return builder.toString();
}