AJT Templates
(Ajax JavaScript Templates Tag Library)

JavaScript Templates and Text Preprocessor

Thank you for your interest in the AJT Templates.

The AJT Templates is a JSP tag library to enhance your JavaScript code. It allows you to use JavaScript templates and C-like preprocessor (#define, #ifdef, #if, etc)

Dynamic Compilation
When JSP is requested, templates are compiled and saved as a JavaScript file on server-side. The generated JS file is reused for other requests until the template are updated.

Downloads

Multiple Engines
Multiple template engines can be invoked from AJT Custom tag. Embedded JavaScript (EJS), Closure Templates (SOY), JavaScript Templates (JST), JSmarty, jQuery Templates, Ajax Pages and AJT Tags (built-in template) are available.

Example 1) Hello Template
Declare AJT tag library and specify templates in <a:script> tag.
hello.jsp

<%@ taglib uri="http://www5f.biglobe.ne.jp/~webtest/ajt" prefix="a"%>
<html><head>
<a:script type="text/javascript" src="hello.js" template="hello.ajt" />
</head>
<body onload="sayHello('My Name')">
    <div id="view"></div>
</body>
</html>

Describe template in {template} tag. JavaScript in braces {} is executed, and expression between {$ } is evaluated.
hello.ajt

function sayHello(name) {
    {template elementId="view"}
        {for var i=1; i<=6; i++}
            <h{$i}>Hello {$name}!</h{$i}>
        {/for}
    {/template}
}

It will be converted into the HTML content below:

Hello My Name!

Example 2) Assert Macro
Define macros and JavaScript functions in <a:preprocessor> tag or AJT template file. In this sample, ASSERT, PRINTLN, PRINT, _print are defined only if DEBUG environment variable is 'ture'. Otherwise, they are replaced with an empty value (removed from your code).
macros.jsp

<%@ taglib uri="http://www5f.biglobe.ne.jp/~webtest/ajt" prefix="a"%>
<a:preprocessor>
#if <%= System.getenv("DEBUG") %> == true
#
# define ASSERT(b)\
    if (!(b)) { _print("<font color='red'>Assertion failed: "+#b+"</font><br>"); }
# define PRINTLN(s) _print((s)+"<br>")
# define PRINT(s)   _print(s)
	<script type="text/javascript">
	<!--
	function _print(s) {
		var t = document.createElement("span");
		t.innerHTML = (s);
		document.body.appendChild(t);
	}
	//-->
	</script>
#
#else
#
# define ASSERT(b)
# define PRINTLN(s)
# define PRINT(s)
#
#endif
</a:preprocessor>

Call the macros in your templates. ASSERT, PRINTLN, PRINT are replaced with the replacement defined when the templates are processed.
template.ajt

function doSearch(type) {
	PRINTLN("[doSearch] member type=("+type+")");
	ASSERT(type=="all" || type=="gold" || type=="silver" || type=="copper");
}

If the DEBUG env variable is true, the template will be converted into below:

function doSearch(type) {
	_print(("[doSearch] member type=("+type+")")+"<br>");
	if (!(type=="all" || type=="gold" || type=="silver" || type=="copper")) { ... };
}

If the DEBUG env variable is NOT true, the template will be converted into below:
(PRINTLN and ASSERT are removed from your code)

function doSearch(type) {
	;
	;
}

Any questions and comments, please send e-mail to us at webtestfeedback@yahoo.co.jp

Change Records
Jan 20, 2011: 0.3.0 is released
Dec 20, 2010: 0.2.0 is released
Nov 20, 2010: 0.1.0 is released

2011 AJT Templates Project