I've recently started playing with Play Framework and I was wondering: is there a way to write my templates using not Scala but Java?
E.g. this link http://www.playframework.com/documentation/2.1.0/JavaGuide3 provieds great tutorial to start with, but some Scala code makes it really hard for me to understand almost anything...
I mean, I could learn that much but it would be amazing if it's possible to write all in Java
Sure, you can use Freemarker as a template language.
https://github.com/guillaumebort/play2-freemarker-demo
You can effectively use Freemarker and you can also don't use server side compiled template :
Create Rest API
Put html template in public directory
Use javascript for populate view (html)
For structure your application, Angular could be a good solution.
Related
I am working on a Swing application and would really love to declare my views in an XML format in fashion similar to GWT's UiBinder, JSP, JSF, ZK, IceFaces, etc.
I found JFCML but it doesn't appear to be an active project; in terms of development as well as use/reference.
Have my Google skills failed me or does something like this not exist? If it doesn't exist, is it because such methods of separating view and controller are better done another way in Swing?
The "built-in" solution is the XMLEncoder - XMLDecoder pair, but they are not widely used, I am not sure that they can cope with real-world scenarios.
A lot of open-source libraries have been suggested already on SO, I recommend these questions:
suggestions for declarative GUI programming in Java
Java: Create a GUI with XML?
Is XML or XUL the future of Java GUI building?
Java form from xml
Some questions:
Why when I generare a new play app with scala is there no model folder?
Can I use JPA instead of Anorm?
I saw some similarities between Ruby on Rails and Play. So are there any helper methods in Play Framework (form helper, link helper, etc)?
Is it possible to use the Play Java Framework with Scala?
Why when I generare a new play app with scala is there no model folder?
For simple apps, you just define one models.scala file. You don't necessarily need a folder, even when you're using the modelspackage. Less visual clutter so to speak. When your app grows bigger you can refactor and put everything in a separate folder.
Can I use JPA instead of Anorm?
Of course. But you should definitely check out Anorm, or Squeryl, or ...
I saw some similarities between Ruby on Rails and Play. So are there any helper methods in Play Framework (form helper, link helper, etc)?
There are some special shortcut tags, especially in the Groovy markup (checkout out the cheat sheet). Creating your own partial components is simple enough, however. The concept of helper doesn't really exist AFAIK.
Is it possible to use the Play Java Framework with Scala?
Haven't tried it for myself but I've read that you can mix Java and Scala classes, the compiler will compile everything you throw at him.
I would recommend implementing the tutorial on play website. Also, you may want to try the scalagen module - it would give you an easy way to generate code while you are learning at least. A quick disclaimer - I wrote the module :-)
Suppose I have a bunch of (very simple) HTML pages, that I want to apply a common 'theme".
These files are downloaded using various Groovy scripts, and I would like to apply to them this styling during a maven build. How could I do that ?
Using which framework/library could I do that ?
Furthermore notice I want to do that in a static fashion, that's to say I want to have the following process to occur
Files are downloaded by Groovy scripts
They are processed (in a "magical" fashion) by this library
They may be sent by FTP/SCP to an hosting server
Do you know such an easy to use library ?
Depends on the details of the task but having in mind the steps you've described you can consider using velocity templates.
I would suggest using sitemesh decorator. I am a user of old version but a new release is being worked on that allows you to do exactly what you are asking for. Do a google search on sitemesh and you should find lots of examples.
In a nutshell sitemesh decoration: basic html + template = decorated page.
I wanted to use JET (Java Emitter Templates)
in my Netbeans projects, but had to find out that JET
heavily depends on Eclipse libraries.
Is there something similar to JET, but as a standalone project?
Something which is open source and well maintained?
Futhermore, is "code generation" the common term for such tools?
If you are using Maven, you can use JET templates with the maven-jet-plugin.
This seems to be the source code. And here the documentation.
It is not actively maintained but works pretty well and follows the JET spec.
I've used it with templates and skeletons.
It's self contained, doesn't depend on Eclipse, and doesn't introduce any transitive dependencies to your project.
Indeed JET is very tied with Eclipse.
If you want to generate code without Eclipse you should use another solution.
You can choose another template engine like Velocity (https://velocity.apache.org/) or FreeMarker (https://freemarker.apache.org/).
Or you can choose a code generator working by itself independently of any IDE.
For example "Telosys Command Line Interface" : http://www.telosys.org/
From what I know, JET is something like JSP, no?
Java Emitter Templates are very similar to Java Server Pages (JSPs). Both JETs and JSPs use the same syntax, and are compiled to Java behind the scenes. Both are used to separate the responsibility for rendering pages from the model and controller. Both accept objects passed into them as an input argument, both allow inserting string values within code ("expressions"), and allow direct use of Java code to perform loops, declare variable, or perform logical flows ("scriptlets"). Both are good ways of representing the structure of a generated object (web page, Java class, or file) while supporting customization of the details.
JETs differ from JSPs in a few key ways. In a JET, the structure of the markup may be changed to support generating code in different languages. Typically the input to a JET will be a configuration file and not user input (though there is nothing forbidding this). And also typically, JET processing will take place only once for a given workflow. These are not technical limitations, and you may find uses for JETs which are quite different...
ibm.com
Here are a few links to get you started on JSP, if that sounds like what you need:
sun.com
netbeans.org
Look for "template engine" for these types of tools.
A couple you might want to look at:
Apache Velocity (http://velocity.apache.org/)
StringTemplate (http://stringtemplate.org/)
I ended up using ERB (Ruby's template engine).
Works great in Netbeans!
I define custom ant task which generates source files by calling ERB (whose results are placed inside a non-versioned special directory).
The ant task is overriding Netbeans' "-pre-compile" task.
For C#, I have often used CodeSmith and lately the T4 generator which is part of Visual Studio.
I'm looking for something similar for Java, in particular an Eclipse add-in since I do all my Java development using the Eclipse IDE.
I've found that freemarker does a pretty good job for generating any type of code. From the website:
FreeMarker is a "template engine"; a generic tool to generate text output (anything from HTML to autogenerated source code) based on templates. It's a Java package, a class library for Java programmers. It's not an application for end-users in itself, but something that programmers can embed into their products.
It is used by struts2 a lot. The website has a long list of other products that use freemarker.
I have worked with both Velocity and StringTemplate. Velocity is a bit more conventional (think JSP/ASP concepts), while StringTemplate seems a bit cleaner. in a sense described in this Artima interview. Both are pure templating engines, and will require you to write some code around them, if you want to do full-blown code generation from a model.
StringTemplate is used internally by ANTLR, which may be useful to your effort.
As an alternative approach, you could go with Eclipse, using EMF and JET.
You should try Telosys Tools, an Eclipse plugin for code generation working from an existing database with customizable Velocity templates
See: http://www.telosys.org/
Eclipse Marketplace : http://marketplace.eclipse.org/content/telosys-tools
The tutorials are here : https://sites.google.com/site/telosystutorial/
See this other question about CodeSmith : Is there any freeware tool available which is like Codesmith?
I use JavaForger to generate code from templates. It parses existing classes so that you can use that class-data inside your templates. It can both create new classes or insert code into existing classes. You can determine where generated code will be inserted based on a string conversion rule (e.g. myProject/dao/ProductDao.java => myProject/service/ProductService.java).
JavaForger is open source and uses FreeMarker as template engine and JavaParser as parser.
This is an old question but the only thing that comes close (for Java) to do what CodeSmith Generator does is Spring Roo.
The reason is that Java does not have Partial Classes like C# does. Spring Roo gets around this by using AspectJ ITDs.
My answer is to use StringTemplate, but there is a bit more to it than just what tool to use.
Is it the issue to generate java code? Or is it to use java tools? Programmers would be normally very comfortable writing code. Therefore, it would not be a leap to write some java classes and write a walk that would generate code using StringTemplate. I personally think it is a good exercise to create example models, generate your java code from the models. And depending on your use case you could end up writing JSON models by hand and never having to write any java code to produce the java code. Or you could end up writing Java classes that produce equivalent models.
You could use the StringTemplate based STST, which reads JSON. STST is command line based, and I am sure you could hook it to both eclipse and/or Visual Studio.
I personally think about portability, JSON is an extremely simple language. And almost every language has libraries that support it.
I'm not a C# man so I don't know what the equivalents would be, however I've found xdoclet to be very good in the past. I don't think it integrates with eclipse as such but you can run it from an ant script. Does things like generating Hibernate mapping files from annotated Java classes. Useful if that's what you're looking for :)
eclipse has a built-in template system.
look in window -> preferences -> java -> code style -> code templates
You might look at my plugin : http://fast-code.sourceforge.net/. It allows one to select multiple fields and generate code using user specified velocity templates.
Take a look at my project https://github.com/karajdaar/templator and see if that helps.
I wrote a simple web based application for my use.
its available at https://github.com/harish2704/templates
and a demo is available at http://templates-harish2704.rhcloud.com/
Its language independent tool. GUI supports several languages ( highlighting, snippet completion ect )