abstract class Base {}
class A extends Base
class B extends Base
How do I find all places in the code that create Base? (that is, have either new A() or new B())
UPDATE
To make it clear, the above is just and example. I'm interested in a way of searching for object creation of any class, including 3rd party classes that I don't control.
Using Structural Search (Edit -> Find -> Search Structurally):
Create a template: new $Type$($P$)
Edit Type variable: type Base in the text field, check 'Apply constraint within type hierarchy', check 'This variable is target of the search'
Edit P variable: type .* in the text field, set Minimum count to 0, check Unlimited under Maximum count.
Voila!
IttayD if I have understood correctly your latest update, what I normally do (IntelliJ 9.0.4) if I have a similar need to yours is Right click on class name and do "Find Usages" and this will list results in the form of usage categories,
Variable declaration
New Instance creation, to name a few.
As far as I'm aware I do not think there is a specific option/selection choice to fulfill such a usage search check. Thanks
You can create empty default constructor of Base and press Ctrl+Alt+H (Hierarchy Callers). Then you'll see all creations of A and B in as a tree.
Related
How to specify when giving a generic parameter that it should implement some specific creation method? as LIST[G -> create make end] doesn't work :-(
In my particular case,
* SMA_INVERTER_MANAGER_CSV has inherited from CONSUMPTION_SECTOR_MODBUS_DEVICE_CSVa list of devices as devices: LINKED_SET[G] as G -> MEASURING_POINT_MODBUS_DEVICE create make_from_file_path end.
I'd like the SMA_INVERTER_MANAGER_CSV class to be able into devices: LINKED_SET[G] to be able to have either JANITZA_DEVICE, SUNSPEC_DEVICE, ABB_DEVICE, etc. Giving the generic parameter as MEASURING_POINT_MODBUS_DEVICE seems to come out of a sense, but how do I specify that I'd like the creation method to be make_from_file_path
Hope the description is sufficient to understand, refactoring I think this question is linked -> explicit creation type not conforming to type of target
The only workaround for the moment I found working for the moment is
class
SMA_INVERTER_MANAGER_CSV
inherit
CONSUMPTION_SECTOR_MODBUS_DEVICE_CSV[SUNSPEC_DEVICE]
create
make
end
but I'd like it to be
class
SMA_INVERTER_MANAGER_CSV
inherit
CONSUMPTION_SECTOR_MODBUS_DEVICE_CSV[MEASURING_POINT_MODBUS_DEVICE]
create
make
end
which would generate a conformance problem because MEASURING_POINT_MODBUS_DEVICE generic parameter doesn't specify make_from_file_path as creation procedure as its deferred
There is more than a conformance problem. MEASURING_POINT_MODBUS_DEVICE is deferred. Therefore, it cannot be used as an actual parameter for CONSUMPTION_SECTOR_MODBUS_DEVICE_CSV. If it were allowed, how would CONSUMPTION_SECTOR_MODBUS_DEVICE_CSV create an instance of a deferred class?
One possible solution — supplying an effective class — is mentioned in the question. Another solution is to add a formal generic parameter to SMA_INVERTER_MANAGER_CSV with the corresponding constraint and to use it for the actual generic of CONSUMPTION_SECTOR_MODBUS_DEVICE_CSV.
Let's say that I have a class class Foo : Base and I want to perform a certain method call with signature
public void someStuf(Iterable<? extends Base> param)
For the search template I just take as starting point the pre-existing one
$Instance$.$MethodCall$($Parameter$)
Is it possible to match a parameter of any kind Iterable of a specific Base subclass (Foo in this example)??
List<Foo> fooList = new ArrayList<>();
fooList.add(new Foo("A"));
List<Bar> barList = new ArrayList<>();
barList.add(new Bar(1));
someStuff(fooList); // find this!
someStuff(barList); // don't find this one
someStuff(Collections.singletonList(new Foo("B"))); // also match this one
I've tried several combinations without any luck, is it even possible to do?
This was previously not possible without resorting to a hack. See further below for that. Currently, the code can be found using a Type modifier.
search template
$Instance$.$MethodCall$($Parameter$)
variables
$Instance$ Count=[0,1]
$MethodCall Text=someStuff
$Parameter$ Type=Iterable<Foo>, within type hierarchy
hack
The hack previously needed used a Script modifier and a simple Type modifier on the $Parameter$ variable:
$Parameter$
Script=__context__.type.parameters[0].presentableText.contains("Foo")
Type=Iterable
The related bug report is fixed since IntelliJ IDEA 2017.3.
I want to execute the method remove_column on an instance of cl_salv_column_table but because of its visibility level, I am not able to do so.
Plan:
I already tried inheriting from cl_salv_columns_list and then perform the call inside the remove-method:
CLASS lcl_columns_list DEFINITION INHERITING FROM CL_SALV_COLUMNS_LIST.
PUBLIC SECTION.
METHODS:
remove IMPORTING iw_colname TYPE string.
ENDCLASS.
But apparently my casting knowledge got rusty as I'm not able to figure out an appropriate solution.
This is my current hierarchy - the red arrows show the way I would have to take:
My approach looks like this:
DATA lo_column_list TYPE REF TO lcl_columns_list.
lo_column_list ?= CAST cl_salv_columns_list( lo_columns ).
But it fails with:
CX_SY_MOVE_CAST_ERROR
Source type: \CLASS=CL_SALV_COLUMNS_TABLE
Target type: "\PROGRAM=XXX\CLASS=LCL_COLUMNS_LIST"
Background:
My task is to select all columns of 3 tables (which would be done like SELECT t1~*, t2~*, t3~* ...) as long as their names don't conflict (e.g. field MANDT should only be displayed once). This would require defining a very big structure and kick the size of the selection list to a maximum.
To avoid this, I wanted to make use of the type generated by my inline-declaration. Hiding the individual columns via set_visible( abap_false ) would still display them in the layout manager - which looks really ugly.
Is there any other way to accomplish my target?
Use set_technical( abap_true ) to hide the columns entirely. As for your approach - sorry, inheritance does not work that way - in no statically typed object oriented language that I know. You can't 'recast' an instantiated object to a different class. You would need to modify the framework extensively to support that.
We all know the ASSIGN COMPONENT name OF STRUCTURE TO <dest> command. I would like to use this command to access public attributes of classes. But according to the documentation (and unfortunately also my debugger), this does not work for classes.
Is there any possiblity to do that? Using classes, it always returns sy-subrc = 4.
Assuming that your reference variable is LR_FOO and the attribute name is BAR, you can use ASSIGN ('LR_FOO->BAR') TO <dest>.
I have an abstract class called "com.foo.BaseFoo"
I want to find anyone that calls new() on anything that extends from BaseFoo
I've tried doing a search template of:
new $BaseFoo$()
and then edited the variables to have an expression constraint on the type of the object to be
com.foo.BaseFoo
and clicked on the "Apply constraint within type hierarchy" but this hasn't worked.
You were almost there. Use a template like the following:
new $BaseFoo$($argument$)
Where $BaseFoo$
Text/regexp: com\.foo\.BaseFoo
check Apply constraint within type hierarchy
and $argument$
minimum count: 0
maximum count: unlimited