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POJSTL/JSP EL (Expression Language) in a non JSP (standalone) context
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  1. POJSTL/JSP EL (Expression Language) in a non JSP (standalone) context
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    copied!<p>Can anyone recommend a framework for templating/formatting messages in a standalone application along the lines of the JSP EL (Expression Language)?</p> <p>I would expect to be able to instantiate a an object of some sort, give it a template along the lines of</p> <pre><code>Dear ${customer.firstName}. You order will be dispatched on ${order.estimatedDispatchDate} </code></pre> <p>provide it with a context which would include a value dictionary of parameter objects (in this case an object of type Customer with a name 'customer', say, and an object of type Order with a name 'order').</p> <p>I know there are many template frameworks out there - many of which work outside the web application context, but I do not see this as a big heavyweight templating framework. Just a better version of the basic Message Format functionality Java already provides </p> <p>For example, I can accomplish the above with java.text.MessageFormat by using a template (or a 'pattern' as they call it) such as</p> <pre><code>Dear {0}. You order will be dispatched on {1,date,EEE dd MMM yyyy} </code></pre> <p>and I can pass it an Object array, in my calling Java program</p> <pre><code>new Object[] { customer.getFirstName(), order.getEstimatedDispatchDate() }; </code></pre> <p>However, in this usage, the code and the pattern are intimately linked. While I could put the pattern in a resource properties file, the code and the pattern need to know intimate details about each other. With an EL-like system, the contract between the code and the pattern would be at a much higher level (e.g. customer and order, rather then customer.firstName and order.estimatedDispatchDate), making it easier to change the structure, order and contents of the message without changing any code.</p>
 

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