MenuItemTagpublic class MenuItemTag extends SimpleTagSupport | This class is a custom action for conditionally inserting HTML links in a
navigation menu.
If the action is used in a page requested with a URL corresponding
to the page attribute, only the HTML text is included.
Otherwise an HTML link (<a>...</a>) element
is used to enclose the HTML text. The action also "URL rewrites" the page
URL (embeds a session ID, if needed). |
| Fields Summary |
|---|
| private String | page |
| Methods Summary |
|---|
| public void | doTag()Writes either the body content as-is or enclosed in an HTML link
element to the current JspWriter, depending on if the request URI
matches the page attribute value or not.
The content is enclosed in an HTML link element
(<a>...</a>) if the page
attribute doesn't correspond to the current page and the link
is "URL rewritten" (a session ID is added, if needed), and the
result is written to the current JspWriter.
JspFragment body = getJspBody();
if (body == null) {
throw new JspTagException("'menuItem' used without a body");
}
PageContext pageContext = (PageContext) getJspContext();
HttpServletRequest request =
(HttpServletRequest) pageContext.getRequest();
String requestURI = request.getServletPath();
// Convert the specified page URI to a context-relative URI
String pageURI = StringFormat.toContextRelativeURI(page, requestURI);
if (requestURI.equals(pageURI)) {
// Add the body as-is
body.invoke(null);
}
else {
// Add the body as the text of an HTML link to page
String uri = request.getContextPath() + pageURI;
HttpServletResponse response =
(HttpServletResponse) pageContext.getResponse();
StringWriter evalResult = new StringWriter();
StringBuffer buff = evalResult.getBuffer();
buff.append("<a href=\"").append(response.encodeURL(uri)).
append("\">");
body.invoke(evalResult);
buff.append("</a>");
getJspContext().getOut().print(buff);
}
| | public void | setPage(java.lang.String page)Sets the page attribute.
this.page = page;
|
|
