I have a DSL written in Xtext. In order to add custom content proposal, I have edited the MyDslProposalProvider class in the ui project. The new proposals are present when I debug the plugin in Eclipse, but not in the web editor, which is ultimately what I want. I want to set the custom proposals at a single place and all generated editors to use them. Is it possible to do that with Xtext?
As I had the same problem and struggled a little bit with the solution (as I would like to use both, Eclipse editor and Web editor) I would like to provide some more detailed feedback on a possible solution here, which worked well for me.
In my solution I did the following steps.
Implement a MyDslIdeContentProposalProvider in my.dsl.ide sub project extending from IdeContentProposalProvider, package my.dsl.ide.contentassistant (newly created); an example of such an implementation may be found here.
The implementation is not such convenient as at the well known UI proposal provider for Eclipse. I had to implement switch cases based on MyDslGrammarAccess elements instead of structural grammar elements like in the UI proposal provider. On the other hand, I have only one proposal implementation for all editor cases that way (DRY principle!).
Register the MyDslIdeContentProposalProvider at MyDslIdeModule in the same project (only with that it works already in the web editor).
def Class<? extends IdeContentProposalProvider> bindIdeContentProposalProvider() {
MyDslIdeContentProposalProvider
}
Register the new MyDslIdeContentProposalProvider and the forwarding class UiToIdeContentProposalProvider at the MyDslUiModule in the my.dsl.ui sub project. (That's what took the longest investigation as it cannot be logically derived.)
override Class<? extends IContentProposalProvider> bindIContentProposalProvider() {
return UiToIdeContentProposalProvider
}
def Class<? extends IdeContentProposalProvider> bindIdeContentProposalProvider() {
return JavaPOSConfigLanguageIdeContentProposalProvider
}
For an full example see here.
As I had implemented the MyDslIdeContentProposalProvider in the newly created package my.dsl.ide.contentassistant, this package has to be exported in the MANIFEST.MF file of the sub project my.dsl.ide (the subsequent 2 exports were already there). Otherwise i would get an an error Access restriction: The type is not accessible due to restriction on required project in the MyDslUiModule.
Export-Package: my.dsl.ide.contentassist,
my.dsl.ide.contentassist.antlr,
my.dsl.ide.contentassist.antlr.internal
That way it worked well for for both editors, Eclipse and web.
Thanks Christian again for the initial hint!
... If I could make a wish, I would like to have the same structural grammar element access in the MyDslIdeContentProposalProvider as we have it today in UI proposal provider.
you need to subclass org.eclipse.xtext.ide.editor.contentassist.IdeContentProposalProvider and bind it in YourDslIdeModule and YourDslUiModule. Then (in Xtext 2.13) you can use org.eclipse.xtext.ui.editor.contentassist.UiToIdeContentProposalProvider bound in YourDslUiModule to delegate to that in eclipse ui.
Related
I need to extend spring data in order to support my own custom backend. From the spring data website, it seems that it is possible to add community modules to the framework, which in turn enables you to support a custom backend. However, I can't seem to find some code examples/docs illustrating the module implementation mechanism.
Even a basic example using a file-based persistence would be very helpful.
You just have to extend it then you can override the methods and add your own. If you're using IntelliJ, just implement/extend (for example) CrudRepository, execute Generate Code and select Implement methods or Override methods.
public MyRepository extends CrudRepository<T, Long>{
//in Mac, you press command + N. Then select Override methods.
//in Windows, I don't think Generate Method is given a shortcut. You can find it in the menu bar
}
We have an Eclipse IDE application on 3.x that uses various newWizards to allow the user to create different files. Although these files differ slightly contentwise, the structure of the wizards is quite similar.
Thus, a sound object-oriented approach would be to instantiate different wizards from the same class and initialize them with different data.
Problem:
To decide what wizard needs which data we need a way to distinguish the different already instantiated wizards (e.g during the call to the init method of the wizard).
Is there any way to do so? It would e.g. help if somebody knows a way to get the wizard's id defined in the extension point from within the instantiated wizard.
If your wizard implements IExecutableExtension, it will be passed the configuration element that represents the extension for which it is created.
You can also use extension factories in that you specify a type that implements IExecutableExtensionFactory.
The interface allows you to control how the instances provided to extension-points (wizards in your case) are created.
Extension example:
<extension point="org.eclipse.ui.wizards">
<newWizard
name="..."
class="com.example.WizardFactory">
</newWizard>
Note that the extension factory may also implement IExecutableExtension to gain access to extension attributes before creating the extension's executable class.
I mainly program Android, and one of the things I (and the rest of android programmers I'm sure) use with tenacity is android.util.Log. Every class I create has a
private static final String TAG = "ClassName";
tag that I write up as soon as I create the class, before I work on anything else. So, since I always create the tag I figured it would just save me on time (albeit a small amount) to just have it as part of the template for an empty class. My problem is, I don't know how or where to create code templates. Can anyone inform me on how to manage and create them?
What you're referring to are called "code templates" in Eclipse.
Go to Eclipse Preferences, search for "templates", you'll find them under Java -> Code Style -> Code Templates.
I'm using Netbeans. When I create a Java class, I sometimes want to change it to be a GUI component so that I can visually edit it using the GUI Builder.
What is the necessary step to transform a regular Java class to a GUI component so that Netbeans would recognize it and allow me to use GUI Builder ? (i.e. switch between Source and Design)
NetBeans' Gui builder, Matisse, works off a .form xml file located adjacent to the source file. Matisse creates and maintains the .form file and the code generator creates/updates methods in the java source to reflect changes to the form.
Unfortunately, there is no support in NetBeans for free-form GUI construction.
The closest I've seen is FormGenerator. It's a contributed NetBeans module that adds a right click action to .java files that will attempt to generate a .form file from the .java source. It's very limited, but it's better than nothing. It works best if you've followed the coding style employed by Matisse.
http://netbeans.org/projects/contrib/downloads/download/Readme.txt
http://netbeans.org/projects/contrib/downloads/download/FormGeneratorModule.zip
To add a class to the Palette, all that's needed is for your class to conform to the Java Beans model. That is, your class must:
be serializable
have a public, no-argument constructor.
All fields that have getter and setter methods that are named properly, i.e.:
int count
int getCount()
void setCount(int c)
should by default be recognized as a property.
For a finer control of what properties should and should not be exposed to the GUI Builder, you can associate your class with an implementation of the BeanInfo interface. See this Sun tutorial for more details.
However, NetBeans has several tools to help you in designing a custom bean. You can create new beans using the built-in templates available in the new file dialog, under the "JavaBeans Objects" folder.
This tutorial will guide you through creating an Image Bean.
What you could do is create one from scratch, design it as you wish, and then look at the generated code to understand how you can modify your existing class.
Try to use properties (Java bean!) for properties which should be changed from the ui designer and look here for more info.
I'm working on a GWT project and I find it very tedious to have to add a function to my servlet, then copy and paste the function signature into my Service interface, then copy and paste it into my ServiceAsync interface and change the return parameter to be a callback. Is there a tool or a setting where I can just add public methods to my class and they can get copied into the other interfaces? Even if its not automatic it would be nice to be able to select specific methods and have them copied automatically.
I'm using eclipse and ideally it would update my interface each time I save implementation since thats when it checks my code and complains that my changes break the interface.
If you add the method to your *Service interface, then Eclipse can auto-generate the method ("Add unimplemented methods...") in your *ServiceImpl servlet, which you can then just fill in. Also, if you've got the Google Eclipse plugin installed, it will underline the new method in your *Service interface and complain that it's not in the *ServiceAsync. It might have a CTRL + 1 option to generate it in that interface as well.
You don't really need a tool. Just factor out the many RPC methods by just one method that takes a Request/Response. all you need to do is create subclasses of Request/Response and you don't need to think about adding new methods in the 2 interfaces.
You can use Google Guice on the server side to map the incomming request to a class handling the call... or you could use a visitor approach to forward the incoming request to the code handling the request (without resorting on a big instanceof construct).
Instantiations WindowBuilder GWT Designer does exactly what you are looking for.
The RemoteService Wizard will create all three files at the same time as well as keep them in sync as you make changes.
http://www.instantiations.com/windowbuilder/gwtdesigner/index.html
FWIW - I am only a user/purchaser of this product. I am not employed or in any other way related to Instantiations.