Im currently doing a lot of testing with JPA entities, where i have to keep calling the setter methods on the entity that looks something like this :
myEntity.setXXX(value);
myEntity.setYYY(value);
myEntity.setZZZ(value);
Is there any magic shortcut or menu in eclipse IDE to generate all the setter-method-calls that starts with "set", like those displayed in the ctrl-space (auto completion) popup (i think the inherited methods from Object are not being shown at popup) ?
So im imagining something like :
i type myEntity.set
and myEntity.set* are generated right away
Im a lazy programmer and currently using Eclipse Helios IDE.
Thank you !
Edit
Im not looking for source -> generate getter and setter, because that would helps me in generating the methods itself. Generating the method calls is what i want to achieve.
I have found the answer (I was always searching for this thing)...
The easiest way is to expand the class members in the "Package Explorer", sort them by name, multi-select all the setters, and then you have in the clipboard all the method names...
;-)
I like #Oscar's answer. It does lead to some cleanup though.
When I paste from the clipboard, I get something that looks like this:
setOne(int)
setTwo(String)
In order to clean this up, I first add semicolons with this search/replace regexp:
search = (.)$
replace = \1;
Then I add the getter calls (assuming incoming data object is named "data"):
search = s(et.*)\(.*
replace = s\1(data.g\1());
This doesn't handle multiple arguments in a method call...
you can use the outline at right side. There you can sort alphabetically or by declaration order using the toolbar button of the view.
and then you can filter out non required this.
From here also you can copy..all setter functions or getters functions names...
There is eclipse plugin to do that. The name of the plugin is **
FastCode
**. There are so many templates. Among those there is template to generate code for create object of the class and all setters method.
Source --> Generate Getters and Setters...
You can also get at it via the Quick Fix command (Ctrl+1) when the cursor is on a property.
EDIT
If you are simply looking for a faster way to copy properties from one object to another I suggest that you look at using reflection. I think this path would be much easier long term then generating the same-looking code over-and-over.
Commons BeanUtils can take away some of the pain in writing pure reflection code. For example, copyProperties takes a destination bean and either another bean or a Map as the source.
Related
I am automating using Selenium, Capybara and siteprism.
Using rubymine, I want to get code completion such that I can type #page. and get a list of the methods (this works) and a list of the elements and sections defined in the page object using siteprism.
Is there any way to do this in Rubymine?
Sublime text editor does this, but yet it doesn't handle the class names and methods very well.
In site-prism the methods on a page-object class such as the getters, waiters, etc are added dynamically by the class methods element, elements, section, sections when the class is evaluated. This adds several methods about a particular element for each listing in the class.
That means there's no way for rubymine to simply read the files looking for def to determine what methods should exist on any instance of #page.
You might be able to code something up to get it working, but there's no straightforward solution.
With intellij idea, how do I find out what makes a variable be visible?
An example of when it is hard:
Suppose you look at class A, and you see a variable something. If you jump to source you see that it's defined in trait X. But you don't extend trait X directly. What do you extend, then, that makes this variable visible? If you have a deeply nested hierarchy, tracking can be hard.
Any recommendations or solutions?
EDIT: Please vote for the feature if you're interested: http://youtrack.jetbrains.com/issue/IDEA-124369
I don't think that IntelliJ IDEA has any shortcut for "finding what makes a variable visible".
However you can determine it using the "Find Usages" option (Alt + F7). For example:
import java.nio._
object TempObj extends App {
def func = 2
val p = file.Paths.get("some-path")
func
}
So Find Usages on "file", tells you that its from the Package "file" (in heading of the new Tab it also shows the complete package name, ex: Find Usages of java.nio.file in Project Files).
Whereas Find Usages on func will tell you that its a Method (And the Tab heading now says: Find Usages of func() in Project and Libraries)
So now in way you can determine, what exactly makes the variable visible. This also works for imports since it shows the package from which it is imported and you can then look for import of that packages.
I know of two almost-solutions to this problem.
Go-to-declaration, as you mentioned, solves this problem in the case of local variables.
More generally, the "find usages" feature gives you a neat little breakdown by type and file of different uses of the variable. From this you can see if it's involved in a static import.
It's not perfect, but with a moment's thought these two are generally sufficient to figure out what you want.
Use ctrl+b or F4 to jump to source code. Alternatively you can use ctrl+shift+a to get option/action. You can find shortcuts at http://gaerfield.github.io/ide-shortcuts/ as well. Hope it will help.
From what I understood you want to see the code that creates an Object you use, for instance Mystery someMystery;.
That gives you two options to populate someMystery:
someMystery = ... where ... is your code to populate
someMystery and if that is the case you should follow
that code (with ctrl+B as far as you need to) to the point where it
actually creates the Mystery object.
Use CDI to populate that object instance for you, in which case you should look into the CDI mechanism in order to see in what way the object instance is populated.
In either way IMO there is no way to know for sure if the someMystery instance is of some more concrete class than Mystery, because it is decided in runtime, not in compile time, so your next bet would be to run the program in debug and see what object goes into someMystery, although you are not guaranteed to get the same type of object every time.
PS. My answer is based entirely on my java understanding of the topic, can't say if it is valid for scala also.
This might not be exactly the answer you were hoping to get.
However, quoting yourself,
If you have a deeply nested hierarchy, tracking can be hard.
Have you considered using composition over inheritance? Perhaps this would remove the need for the feature you are looking for.
Deeply nested hierarchy doesn't sound good. I understand your pain about that.
When you override vals or defs there is a little circle next to the line number that shows where it is from even when it is from nested hierarchy. Hovering over vals with the command key down also shows you a little tooltip where it is from.
Does this help?
https://youtu.be/r3D9axSlBo8
if you want class, field or method to be visible, you need to implement them as public. If it was your question.
I'm doing some competitions on a website called topcoder.com where the objective is to solve algorithmic problems. I'm using Eclipse for this purpose, and I code in Java, it would be help me to have some predefined templates or macros that I can use for common coding tasks. For example I would like to write methods to be able to find the max value in and int[] array, or the longest sequence in an int[] array, and so on (there should be quite many of these). Note I can't write these methods as libraries because as part of the competition I need to submit everything in one file.
Therefore ideally, I would like to have some shortcut available to generate code both as a method and as a calling statement at once. Any ideas if this is possible?
Sure you can - I think that's a nifty way to auto-insert boilerplate or helper code. To the point of commenters, you probably want to group the code as a helper class, but the general idea sounds good to me:
You can see it listed in your available templates:
Then as you code your solution, you can Control+Space, type the first few characters of the name you gave your template, and you can preview it:
And then you can insert it. Be sure if you use a class structure to position it as an inner class:
Lastly - if you want to have a template inserts a call to method from a template, I think you would just use two templates. One like shown above (to print the helper code) and another that might look like this, which calls a util method and drops the cursor after it (or between the parentheses if you'd like, etc):
MyUtils.myUtilMethod1();${cursor}
I have a use case where I need to create a class based on user input.
For example, the user input could be : "(Int,fieldname1) : (String,fieldname2) : .. etc"
Then a class has to be created as follows at runtime
Class Some
{
Int fieldname1
String fieldname2
..so..on..
}
Is this something that Scala supports? Any help is really appreciated.
Your scenario doesn't seem to make sense. It's not so much an issue of runtime instantiation (the JVM can certainly do this with reflection). Really, what you're asking is to dynamically generate a class, which is only useful if your code makes use of it later on. But how can your code make use of it later on if you don't know what it looks like? For example, how would your later code know which fields it could reference?
No, not really.
The idea of a class is to define a type that can be checked at compile time. You see, creating it at runtime would somewhat contradict that.
You might want to store the user input in a different way, e.g. a map.
What are you trying to achieve by creating a class at runtime?
I think this makes sense, as long as you are using your "data model" in a generic manner.
Will this approach work here? Depends.
If your data coming from a file that is read at runtime but available at compile time, then you're in luck and type-safety will be maintained. In fact, you will have two options.
Split your project into two:
In the first run, read the file and write the new source
programmatically (as Strings, or better, with Treehugger).
In the second run, compile your generated class with the rest of your project and use it normally.
If #1 is too "manual", then use Macro Annotations. The idea here is that the main sub-project's compile time follows the macro sub-project's runtime. Therefore, if we provide the main sub-project with an "empty" class, members can be added to it dynamically at compile time using data that the macro sees at runtime. - To get started, Modify the macro to read from a file in this example
Else, if you're data are truly only knowable at runtime, then #Rob Starling's suggestion may work for you as it did me. I'll share my attempt if you want to be a guinea pig. For debugging, I've got an App.scala in there that shows how to pass strings to a runtime class generator and access it at runtime with Java reflection, even define a Scala type alias with it. So the question is, will your new dynamic class serve as a type-parameter in Slick, or fail to, as it sometimes does with other libraries?
Is there any quick way to add a parameter in all methods of a package in eclipse?
If you mean to add a few parameters for one method and after that it'll be updated automatically in all packages , there is. Right click on the method and there is option Refactor -> Change Method signature, here you can add/remove parameters.
See http://www.raymondcamden.com/index.cfm/2009/3/16/Multifile-search-and-replace-in-Eclipse. You will have to modify the instructions there just a tad for your needs:
Instead of telling Eclipse to search for a literal string you will be searching for a regular expression pattern that describes a method call/definition. I'll leave that as an exercise for you ;-)