Freemarker template files I believe.

[http://freemarker.org/][1]


  [1]: http://freemarker.org/

FTL stands for FreeMarker Template.

It is very useful when you want to follow the MVC (Model View Controller) pattern. 

The idea behind using the MVC pattern for dynamic Web pages is that you separate the designers (HTML authors) from the programmers. 

&#39;ftl&#39; stands for freemarker. It combines server side objects and view side (HTML/JQuery) contents into a single viewable template on the client browser. &lt;br&gt;
Some documentation which might help:

&gt; http://freemarker.org/docs/

Tutorials:

&gt; http://www.vogella.com/tutorials/FreeMarker/article.html&lt;br/&gt;
&gt; 
&gt; http://viralpatel.net/blogs/freemaker-template-hello-world-tutorial/

http://filext.com/file-extension/FTL points to http://freemarker.sourceforge.net/ , does that help?

Have a look [here][1].

Following files have FTL extension:

 - Family Tree Legends Family File
 - FreeMarker Template
 - Future Tense Texture

  [1]: http://filext.com/file-extension/FTL

An ftl file could just have a series of html tags just as a JSP page or it can have freemarker template coding for representing the objects passed on from a controller java file.&lt;br/&gt; 
But, its actual ability is to combine the contents of a java class and view/client side stuff(html/ JQuery/ javascript etc). It is quite similar to velocity. You could map a method or object of a class to a freemarker (.ftl) page and use it as if it is a variable or a functionality created in the very page.

I&#39;m with a pretty small startup and we started using a form of a Scrum/Agile development cycle.  

In many ways I enjoy Scrum.  We have relatively short sprints (2 weeks) and I like the Burn Down Chart to track the team&#39;s progress. I also like the Feature Board so I always know what I should be doing next.  It feels good taking down a feature&#39;s card from the board, completing it and then putting it in the burn down pile.

However, we are now entering in our 18th Sprint release cycle and I&#39;m starting to feel a little burnt out.  It isn&#39;t that I don&#39;t like job or my co-workers, it is just that these sprints are... well, *sprints*.  From start to finish I literally feel like I&#39;m racing against the clock to maintain our development velocity.  When we are done with the sprint we spend one day planning the next sprint&#39;s feature set and estimates and then off we go again.

For people who work in a mature Agile/Scrum development process, is this normal?  Or are we missing something?  Is there normally time in a Scrum enviornment that is unassigned/untracked to get done some minor things and to clear your head?

Can burnout happen when doing Scrum sprints continuously?

I&#39;m changing some classes of mine from an extensive use of getters and setters to a more pythonic use of properties.

But now I&#39;m stuck because some of my previous getters or setters would call the corresponding method of the base class, and then perform something else. But how can this be accomplished with properties? How to call the property getter or setter in the parent class?

Of course just calling the attribute itself gives infinite recursion.

    class Foo(object):
    
    	@property
    	def bar(self):
    		return 5
    
    	@bar.setter
    	def bar(self, a):
    		print a
    
    class FooBar(Foo):
    	
    	@property
    	def bar(self):
    		# return the same value
    		# as in the base class
    		return self.bar # --&gt; recursion!
    
    	@bar.setter
    	def bar(self, c):
    		# perform the same action
    		# as in the base class
    		self.bar = c    # --&gt; recursion!
    		# then do something else
    		print &#39;something else&#39;
    
    fb = FooBar()
    fb.bar = 7

How to call a property of the base class if this property is being overwritten in the derived class?

I am new to a project and have to learn it inside out.  I see a lot of files with the extension `.ftl` in them.  I&#39;m not sure what they are.  I know they can be modified and the user sees changes in the front end.

What are FTL files

<p>I am new to a project and have to learn it inside out.  I see a lot of files with the extension <code>.ftl</code> in them.  I'm not sure what they are.  I know they can be modified and the user sees changes in the front end.</p>


I have an Ant file that compiles my program. I want the javac task to fail if any warning was reported by the compiler. Any clue on how to do that?



Make javac treat warnings as errors

I&#39;ve a Java object &#39;ChildObj&#39; which is extended from &#39;ParentObj&#39;. Now, if it is possible to retrieve all the attribute names and values of ChildObj, including the inherited attributes too, using Java reflection mechanism?

[Class.getFields][1] gives me the array of public attributes, and [Class.getDeclaredFields][2] gives me the array of all fields, but none of them includes the inherited fields list.

Is there any way to retrieve the inherited attributes also?


  [1]: http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Class.html#getFields()
  [2]: http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Class.html#getDeclaredFields()

Retrieving the inherited attribute names/values using Java Reflection

What is the most elegant way to implement this function:

    ArrayList generatePrimes(int n)

This function generates the first `n` primes (edit: where `n&gt;1`), so `generatePrimes(5)` will return an `ArrayList` with `{2, 3, 5, 7, 11}`. (I&#39;m doing this in C#, but I&#39;m happy with a Java implementation - or any other similar language for that matter (so not Haskell)).

I do know how to write this function, but when I did it last night it didn&#39;t end up as nice as I was hoping. Here is what I came up with:

    ArrayList generatePrimes(int toGenerate)
    {
        ArrayList primes = new ArrayList();
        primes.Add(2);
        primes.Add(3);
        while (primes.Count &lt; toGenerate)
        {
            int nextPrime = (int)(primes[primes.Count - 1]) + 2;
            while (true)
            {
                bool isPrime = true;
                foreach (int n in primes)
                {
                    if (nextPrime % n == 0)
                    {
                        isPrime = false;
                        break;
                    }
                }
                if (isPrime)
                {
                    break;
                }
                else
                {
                    nextPrime += 2;
                }
            }
            primes.Add(nextPrime);
        }
        return primes;
    }

I&#39;m not too concerned about speed, although I don&#39;t want it to be obviously inefficient. I don&#39;t mind which method is used (naive or sieve or anything else), but I do want it to be fairly short and obvious how it works.

**Edit**: Thanks to all who have responded, although many didn&#39;t answer my actual question. To reiterate, I wanted a nice clean piece of code that generated a list of prime numbers. I already know how to do it a bunch of different ways, but I&#39;m prone to writing code that isn&#39;t as clear as it could be. In this thread a few good options have been proposed:

- A nicer version of what I originally had (Peter Smit, jmservera and Rekreativc)
- A very clean implementation of the sieve of Eratosthenes (starblue)
- Use Java&#39;s `BigInteger`s and `nextProbablePrime` for very simple code, although I can&#39;t imagine it being particularly efficient (dfa)
- Use LINQ to lazily generate the list of primes (Maghis)
- Put lots of primes in a text file and read them in when necessary (darin)

**Edit 2**: I&#39;ve [implemented in C#][1] a couple of the methods given here, and another method not mentioned here. They all find the first *n* primes effectively (and I have a [decent method][2] of finding the limit to provide to the sieves).


  [1]: https://stackoverflow.com/questions/1042902/most-elegant-way-to-generate-prime-numbers/1072205#1072205
  [2]: https://stackoverflow.com/questions/1042717/is-there-a-way-to-find-the-approximate-value-of-the-nth-prime/1069023#1069023

Most elegant way to generate prime numbers

It&#39;s right there, in the package that it should be indexing. Still, when I call

    JAXBContext jc = JAXBContext.newInstance(&quot;my.package.name&quot;);

I get a JAXBException saying that 

&gt; &quot;my.package.name&quot; doesnt contain ObjectFactory.class or jaxb.index

although it does contain both.

What does work, but isn&#39;t quite what I want, is

    JAXBContext jc = JAXBContext.newInstance(my.package.name.SomeClass.class);

This question from various other people appears on quite some mailing lists and forums but seemingly doesn&#39;t get answers.

I&#39;m running this on OpenJDK 6, so I got the source packages and stepped my debugger into the library. It starts by looking for jaxb.properties, then looks for system properties and failing to find either, it tries to create the default context using com.sun.internal.xml.bind.v2.ContextFactory. In there, the Exception gets thrown (inside `ContextFactor.createContext(String ClassLoader, Map)`), but I can&#39;t see what&#39;s going on because the source isn&#39;t here.

**ETA**:

Judging from the source code for ContentFactory, I found [here][1], this is probably the piece of code that fails to work as intended:

    /**
     * Look for jaxb.index file in the specified package and load it&#39;s contents
     *
     * @param pkg package name to search in
     * @param classLoader ClassLoader to search in
     * @return a List of Class objects to load, null if there weren&#39;t any
     * @throws IOException if there is an error reading the index file
     * @throws JAXBException if there are any errors in the index file
     */
    private static List&lt;Class&gt; loadIndexedClasses(String pkg, ClassLoader classLoader) throws IOException, JAXBException {
        final String resource = pkg.replace(&#39;.&#39;, &#39;/&#39;) + &quot;/jaxb.index&quot;;
        final InputStream resourceAsStream = classLoader.getResourceAsStream(resource);

        if (resourceAsStream == null) {
            return null;
        }

From my [previous][2] [experience][3], I&#39;m guessing that this has to do with the class loading mechanisms of the OSGi container that this is running in. Unfortunately, I am still a little out of my depth here.

[1]: http://www.java2s.com/Open-Source/Java-Document/6.0-JDK-Modules-com.sun/xml/com/sun/xml/internal/bind/v2/ContextFactory.java.htm#createContextStringClassLoaderMapStringObject
[2]: https://stackoverflow.com/questions/1034132/can-i-put-annotations-for-multiple-processors-into-a-java-class
[3]: https://stackoverflow.com/questions/1037356/how-do-i-debug-silent-failures-in-java-applications

Why can&#39;t JAXB find my jaxb.index when running inside Apache Felix?

I have a Java project in Eclipse with ~10 packages and ~10 class files per package.  Is there a way to determine total lines of code for the whole project from within Eclipse?  I am familiar with other tools (e.g., Code Analyzer, wc, etc.) but I want to know if there is a way to do this within Eclipse (or get confirmation that there is no way to do it).

Counting Line Numbers in Eclipse

**Velocity or FreeMarker?**

They look pretty much the same, even the syntax?

What to use? Or when to use what?

Velocity vs. FreeMarker

Freemarker has two collection datatypes, lists and hashmaps
Is there a way to iterate over hashmap keys just as we do with lists?

So if I have a var with data lets say:

    user : {
      name : &quot;user&quot;
      email : &quot;looser@everything.com&quot;
      homepage : &quot;http://nosuchpage.org&quot;
    }

I would like to print all the user&#39;s properties with their value.
This is invalid, but the goal is clear:

    &lt;#list user.props() as prop&gt;
      ${prop} = ${user.get(prop)}
    &lt;/#list&gt;


Freemarker iterating over hashmap keys

I&#39;m about to choose to way to organize my view (with spring-mvc, but that shouldn&#39;t matter much)

There are 6 options as far as I see (though they are not mutually exclusive):

- *Tiles*
- *Sitemesh*
- *Freemarker*
- *Velocity*
- `&lt;jsp:include&gt;`
- `&lt;%@ include file=&quot;..&quot;&gt;`


*Tiles* and *Sitemesh* can be grouped; so can *Freemarker* and *Velocity*. Which one within each group to use is not a matter of this discussion, there are enough questions and discussions about it.

&lt;a href=&quot;http://www.javaworld.com/javaworld/jw-01-2002/jw-0104-tilestrut.html&quot;&gt;This is an interesting read&lt;/a&gt;, but can&#39;t quite convince me to use tiles.

My question is - *what do these frameworks give that can&#39;t be properly done with* `&lt;@ include file=&quot;..&quot;&gt;` and JSTL. Main points (some taken from the article):


1. **Including parts of pages, like header and footer** - there isn&#39;t a difference between:

        &lt;%@ include file=&quot;header.jsp&quot; %&gt;

    and
   
        &lt;tiles:insert page=&quot;header.jsp&quot; /&gt;

2. **Defining parameters in the header** - like title, meta tags, etc. This is very important, especially from SEO point of view. With the templating options you can simply define a placeholder which each page should define. But so you can in jsp with *JSTL*, using `&lt;c:set&gt;` (in the including page) and `&lt;c:out&gt;` (in the included page)

3. **Layout reorganization** - if you want to move the breadcrumb above the menu, or the login box above another side-panel. If page inclusions (with jsp) is not well organized, you might need to change every single page in such cases. But if your layout is not overly complex, and you put the common things in header/footer, there is nothing to worry about.

4. **Coupling between the common components and the specific content** - I don&#39;t find an issue with this. If you want to reuse some fragment, move it to a page that doesn&#39;t include any header/footer, and include it wherever needed.

5. **Efficiency** - `&lt;%@ include file=&quot;file.jsp&quot; %&gt;` is more efficient than anything else, because it is compiled once. All other options are parsed/executed many times.

6. **Complexity** - all non-jsp solutions require additional xml files, additional includes, pre-processor configurations, etc. This is both a learning curve and introducing more potential points of failure. Also, it makes support and changing more tedious - you have to check a number of files/configurations in order to understand what&#39;s happening.

7. **Placeholders** - do velocity/freemarker give anything more than JSTL? In JSTL you put placeholder, and use the model (placed in request or session scope, by controllers) to fill these placeholders.

So, convince me that I should use any of the above frameworks instead of/in addition to plain JSP.

Why would I use a templating engine? jsp include and jstl vs tiles, freemarker, velocity, sitemesh

How to handle `null` values in Freemarker? I get some exceptions in the template when `null` values are present in data.

Handling null values in Freemarker

There is a freemarker file (ftl) in my IntelliJ project that is incorrectly recognized as a text file. There are many of the same type that are correct.

I am aware of the &quot;Mark as text&quot; option. This may be the original reason this file was marked as text but I am not provided with a &quot;mark as ftl file&quot; option to turn it back, if indeed this is the problem. If I mark other ftl files as txt, I am able to turn them back into ftl files as expected.

Content Type	Original Author	Original Content on Stackoverflow
Question	p p	View Question on Stackoverflow
Solution 1 - Java	Jon	View Answer on Stackoverflow
Solution 2 - Java	antonjs	View Answer on Stackoverflow
Solution 3 - Java	NixRam	View Answer on Stackoverflow
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Solution 6 - Java	NixRam	View Answer on Stackoverflow

What are FTL files

Java Problem Overview

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How to call a property of the base class if this property is being overwritten in the derived class?

Can burnout happen when doing Scrum sprints continuously?

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