I'd like to find all references to certain methods within my workspace. I used to do this using Eclipse's ⌘+shift+G / ctrl+shift+G hotkeys for all my Java classes, but now nothing shows up when searching in Scala classes using the Eclipse Scala IDE.
I'm currently using Scala IDE for Eclipse v3.0.3.
Is this reference searching functionality already supported in the Scala IDE, and if so, what is the shortcut for it?
Thanks.
I had this problem too and I ended up installing the Eclipse Quick Search plugin from the Spring team that normally ships as part of STS. It has no Spring dependencies and is easy to install separately from the Eclipse Marketplace. Use ⌘+shift+L and start typing and you get incremental search results.
Find references is implemented as feature but it is far away from being as powerful as the Java implementation.
You can find the actual key combination if you do a right click in the editor area and navigate to the "References" entry.
However, if the find references feature doesn't find anything, then it is clearly a bug and it would be nice if you could report your use case in the ticket tracker.
Did you try using Scala-Search? It's available from the same update site as the Scala IDE itself, and it should find Scala references. See Features docs.
Related
I'm using Netbeans IDE. It's quite annoying and it's a cause of errors the import of Java packages and/or classes that are not provided by Codename One. (Codename One use its own implementation of a subset of Java8 and it cannot support the full Java API).
For example, sometimes Netbeans imports automatically wrong packages (such as "java.awt.BorderLayout" instead of "com.codename1.ui.layouts.BorderLayout"), other times it shows me methods and Javadocs that are not available in Codename One.
Is it possible to force Netbeans to show me only packages, classes, methods and javadocs that are supported by Codename One? It could be useful to avoid errors.
We'd love to but unfortunately the only way NetBeans allows you to do that is if you build your own Java language package. That's what some other plugins like NBAndroid did AFAIK but when we implemented the plugin we didn't want to create something too complex.
If NetBeans supported a "bootclasspath" option for the JDK it would have solved everything. It does have support for plugging in an alternative JDK which can be a micro-profile but because we don't comply with the micro-profile spec I'm not sure if that will work.
At times, NetBeans suggests to import more than one package from the drop-down list. When you check carefully before pressing ENTER this might avoid importing the wrong package.
I use NetBeans for quite a while with CN1 and faced the same problem at the beginning.
Eclipse offers a plugin, which displays the abstract tree view of Java projects. After installing the plugin, the view becomes available. http://www.eclipse.org/jdt/ui/astview/index.php
Is there such a functionality / plugin also available for the Netbeans IDE? I didn't find an answer in stackoverflow. The results in Google dealing with AST in Netbeans are somewhat old (2007-2009).
I know that there are standalone tools which display the AST and also other IDEs which are more useful, if such functionality is required (like IntelliJ Idea).
My question is Netbeans-specific - if this is not possible with Netbeans (without using other tools) a simple "No" will be enough! I am using Netbeans 7.3.
Did you look at these ? It is more recent (2012).
http://netbeans.dzone.com/nb-javac-ast-visualization
https://bitbucket.org/crazyjavahacking
The dev builds of NB already contain such a view in the navigator. Not pretty but it works
I've been searching for a long time now to find a decent IDE for Scala.
Eclipse is not satisfying at all, as auto completion doesn't work, somehow. Also, I can't modify the libraries at all in the build path e.g. set the docs/source.
IntelliJ seems better, however, there are some major bugs:
When the drop down menu appears that lists all the function, some of them are sometimes just not shown! I think it's because of scala-library / scala-compiler, it mixes them up or something...
The docs cannot be fetched, I get this message over and over again (here the functions are listed, strange enough...):
This is the library window:
The dependencies and the compiler are set right, I strongly suppose.
Does anyone know what the problem is? And how to fix it? Or is it a known bug?
Is there an IDE that can handle Scala?
Regards!
Typically, searching for names (values/classes/functions/etc.) for auto-complete can be quite slow compared to Java in IntelliJ simply because the automatically imported namespace can be quite large, and it also searches through all implicit conversions. However, I've never seen it refuse to show functions like your screenshot, what version of IntelliJ and Scala plugin are you using?
I've never gotten the pop-up docs to work via attaching JavaDocs (I haven't tried remote fetching), so I'd recommend just ctrl+click to go through to the source to read the documentation there. (However, the function/type definition does popup correctly when sources are attached). I'd suggest posting an issue at http://youtrack.jetbrains.com/issues/SCL if you have the opportunity.
To your final question, the answer is unfortunately no. The tooling for Scala is nowhere near that of Java, but both Scala IDE for Eclipse and IntelliJ are making great progress in changing that, and both are strong in some areas while weak in others. In the end, you'll get limited support either way, so choose whichever fits you best.
I have found the solution to the problem:
The bug was caused by Java Decompiler Plugin. It tried to decompile the binaries of Scala's class-files, which obviously failed. This led to that error message and further led to the Scala plugin not working as it should, thus not displaying some of the functions.
This took me a long time to figure out, I installed 2 other versions of IntelliJ (which apparently imported the JD plugin), NetBeans and downloaded several builds of the Scala Plugin, only to discover this cause. Deactivating Java Decompiler solved it.
Regards.
Groovy seems to fix a lot of the things I dislike about Java, and I was wondering if it would be possible to actually write an Eclipse plugin in Groovy instead of Java.
Does anyone know if this is possible, and if so how to go about it?
I've just found a blog entry which says it's not officially supported but is actually possible.
Not yet tested to see if it works, but it seems promising:
Writing Eclipse plugins with Groovy, by Jörn Dinkla
#Peter, I do not think that the blog post you linked to is complete or if it will really work. It is pointing to the old version of Groovy-Eclipse, which is no longer supported and is out of date.
Yes. It is possible to create your own plugins in Groovy.
First, install the Groovy-Eclipse plugin from here:
http://dist.codehaus.org/groovy/distributions/greclipse/snapshot/e3.7/
Then you can create a new plugin project and add the Groovy Nature.
Remove the Groovy Libraries classpath container
Instead, add the org.codehause.groovy as a required bundle
Create your Groovy code as normal
Now, the tricky part is exporting the plugin using PDE. See this blog post for how to do that: http://contraptionsforprogramming.blogspot.com/2010/08/groovy-pde-redux.html
One important thing to note is that you will need at least one Java file in your project for PDE to compile anything, It can be a dummy, empty file (this is a bug that has not yet been fixed).
Rejoice!
As an example, here is the codenarc Eclipse plugin that was written completely in Groovy:
http://sourceforge.net/projects/codenarceclipse/
You can also use JRuby, or Javascript ...
JAM Circle is a great example showing how to make great use of a scripting language in an Eclipse plugin, by allowing the end user to write his own actions and load them at runtime.
There's a proxy-like plugin that allows you to implement the plugin virtually in any language that supports JSR223 (javax.scripting)
I've been trying to convert from Java to Scala for a few months, and found that the greatest roadblock is that Eclipse plugin for Scala is hardly better then using Vim.
I normally have "Build Automatically" on, so apart from Open and Save, the commands I use most of the time are:
Open Declaration (F3)
References > Workspace (Ctrl-Shift-G)
Open Type Hierarchy (F4)
Open Type (Ctrl-Shift-T)
Content Assist (Ctrl-Space)
and looking at the Outline.
None of this works with the Scala IDE for the libraries. Some stuff works for my own code, like outline. But the rest just returns the following error:
The resource is not on the build path of a Java project.
Is there any way to get any of those things to work in Eclipse? Without them, basically the only thing I get is syntax highlight and compile-on-save, and I can get syntax highlight from vim without needing 1.5 GB of ram...
With implicits, and static function import, finding out from where something comes is really difficult without F3. I ended up using Google to find what class/trait defines what.
[EDIT] I just pulled Eclipse Classic 3.6.2, and update-1.0.0-milestones-2.8.1.final, which wasn't available the last time I checked. They have fixed the Outline, and "Open Type", that's it. The rest still doesn't work.
Which version of the Eclipse plugin are you using? If the version is from a while ago, then you're right, it's a bit buggy.
However, there is a new version, currently in beta (as of 23.04.2011) available from Scala IDE Eclipse download site. This is a lot better.
Also, please make sure that the 'Use JDT content assists' checkboxes are checked in Scala->Setup diagnostics window.
Please try the new version, and see if it fixes your problems. If not, raise a bug, and the team will fix it.