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core expressions: Find a resource's project, check project natures [message #546615]

Tue, 13 July 2010 14:47

Erhard Weinell

Messages: 39
Registered: January 2010
Location: Kassel, Germany

Member

Dear all,

I'd like to effect the visibility of some commands depending on whether
the selected resources (e.g. in the package explorer) are contained in a
project with specific natures.

Therefore, I need to determine a selected resource's IProject - is this
possible using core expressions?

Furthermore, there is a projectNatures tester available that is supposed
to return a list of project natures. Can I - again using expressions -
check whether a specific nature ID is contained in that list?

Tx in advance,
Erhard

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Re: core expressions: Find a resource's project, check project natures [message #546670 is a reply to message #546615]

Tue, 13 July 2010 17:28

Paul Webster

Messages: 6859
Registered: July 2009
Location: Ottawa

Senior Member

There is a property tester that can test an IResource to find out a
project nature in the containing project:

http://wiki.eclipse.org/Command_Core_Expressions#Property_Te sters

Depending on what you are doing, though, your expression would probably
look like:

<iterate ifEmpty="false">
<adapt type="org.eclipse.core.resources.IResource">
<test .... />
</adapt>
</iterate>

as the selection from the package explorer is either a Collection
(default variable) or an IStructuredSelection (with variable="selection"
or variable="activeMenuSelection")

PW

--
Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions
http://wiki.eclipse.org/Menus_Extension_Mapping
http://help.eclipse.org/galileo/index.jsp?topic=/org.eclipse .platform.doc.isv/guide/workbench.htm

Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions

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Re: core expressions: Find a resource's project, check project natures [message #546867 is a reply to message #546670]

Wed, 14 July 2010 12:33

Erhard Weinell

Messages: 39
Registered: January 2010
Location: Kassel, Germany

Member

Am 13.07.2010 19:30, schrieb Paul Webster:

> Depending on what you are doing, though, your expression would probably
> look like:
>
> <iterate ifEmpty="false">
> <adapt type="org.eclipse.core.resources.IResource">

I was missing the adapt-part. Works well this way, tx!

Erhard

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