I have template system where template is acting as an object.
If you have experience with VB or any other Visual Tool it will be familiar
to you.
So let say you have a table in your template then you are able to write
following code.
HtmlTable table = template.getControl("table1");
Then just because it's an object you can change any predefined in template
file property. Let say background then you will write
table.setBackground("red");
Or even change amount of columns in your table.
Also just because they are acting as an object input field can read/validate
themselves.
So in template file you have <input type="text" name="Age">
In program you can write
template.readFromHtml( req );
template.writeToHtml( res );
And server will produce the same Html page but input box with name "Age"
will have value ( typed in by user ). Very convenient in case user made a
mistake and you need to redisplay the same page and not to lose inputted
information.
So far i wrote 6 succeful pojects with that package and pretty happy.
But I am looking for someone else's input/suggestion to improve that system.
Thanks.
George.
> -----Original Message-----
> From: Peter Delahunty [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, November 10, 1999 12:20 PM
> To: [EMAIL PROTECTED]
> Subject: Re: JSP vs Servlets?
>
> This is the first time i have seen this system.
>
> However it is only usefull if you know exactly what data you are getting
> back from the database before hand. However if you get data back from a
> system where you could be getting back n pieces of data. Well then you
> will
> need to use some sort of loop for, while etc.
>
> At the least you would need to split the template up into segments that
> repeat etc
>
> -----Original Message-----
> From: Justin Wells [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, November 10, 1999 4:49 PM
> To: [EMAIL PROTECTED]
> Subject: Re: JSP vs Servlets?
>
>
> Quoting Murray, Joseph C. ([EMAIL PROTECTED]):
> > Being an old systems programmer who is starting to develop in JAVA
> > and trying to determine the best set of tools to focus on,
> > could you tell me what the template system does? Not conceptually,
> > but how it is used as a tool.
>
> You write 100% pure Java code to create a bunch of data that you
> would like to return to the customer. Perhaps you do:
>
> Hashtable context = new Hashtable();
> Customer c = myDatabase.findCustomer(name);
> context.put("Customer", c);
> context.put("title", "Order page");
>
> You do this in your regular Java servlet, in regular 100% pure Java
> code, with full access to all the features, power, structure, and
> benefits of the Java programming langauge.
>
> The important thing is that you never write any HTML in your servlet.
> Instead you do something like this:
>
> OutputStream out = response.getOutputStream();
> Template t = templateSystem.getTemplate("order-template");
> t.execute(out, context);
>
> which loads a template which you previously wrote and saved in a
> text file under the name "order-template", and then writes it out
> to the output stream you name, using the values in your hashtable
> as the data to fill the template in with.
>
> Notice that there is no HTML at all in your template, and as a result
> the code you look like looks a lot like ordinary program code.
> It isn't all cluttered up.
>
> Similarly the template is not cluttered up with program code. It might
> look something like this:
>
> <html><head><title>Customer Information: $title</title></head><body>
> <h1>Page for customer $Customer.Name
> <table>
> <tr><td>Product</td><td>Quantity</td></tr>
> #foreach $order in $Customer.Orders {
> <tr><td>$order.Product</td><td>$order.Quantity</td></tr>
> }
> Total owing: $Customer.Amount
> </body></html>
>
> This example uses WebMacro syntax, but the idea is largely the same for
> FreeMarker or other template systems.
>
> In the case of WebMacro, because it knows about Java beans, if your
> Customer
> object is a bean then it automatically knows how to extract properties
> from
> it like "Customer.Name" and "Customer.Amount". It also knows how to
> iterate
> through anything like a list/iterator/vector/array/enumeration if that is
> what the Customer.Orders property evaluates to.
>
> FreeMarker differs from WebMacro at this point slightly. Instead of using
> the Java beans spec to extract properties from objects, it requires you to
> supply some adapter objects that adhere to FreeMarker interfaces. The end
> result is the same though--your program data is accessible to the
> template.
>
> You can download them and try them out. Many template systems are free
> software
> products that come with source code. WebMacro is her: www.webmacro.org.
>
> Justin
>
> - - -
> WebMacro Servlet Framework
> http://webmacro.org
>
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