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Rename package programmatically [message #1227099]

Fri, 03 January 2014 14:48

Rick Crawford

Messages: 1
Registered: January 2014

Junior Member

I'm attempting to build an Eclipse new project wizard which uses JDT functions to copy a template project into a user's workspace, then apply some minor refactorings as per the user's preferences. One of these refactorings is to rename one of the Java package names from the template to whatever package name the user specifies. For example, the template contains 'default.template.MyClass' which would need to be renamed to '<whatever.package.is.specified>.MyClass.

I've tried several different ways, but nothing seems to work. My latest attempt looks something like this (I've included hard-coded the values to make this easier to interpret):

IType fromClass = project.findType("default.template.MyClass");
ICompilationUnit compUnit = fromClass.getCompilationUnit();
		
RenameSupport support = RenameSupport.create(
		fromClass.getCompilationUnit(), 
		"testing.MyClass",
		RenameSupport.UPDATE_REFERENCES);
		
ProgressMonitorDialog dialog = new ProgressMonitorDialog(shell);
support.perform(shell,dialog);

When I run this code, I get this error:

org.eclipse.core.runtime.AssertionFailedException: assertion failed: 
	at org.eclipse.core.runtime.Assert.isTrue(Assert.java:110)
	at org.eclipse.core.runtime.Assert.isTrue(Assert.java:96)
	at org.eclipse.jdt.internal.ui.refactoring.RefactoringExecutionHelper.perform(RefactoringExecutionHelper.java:165)
	at org.eclipse.jdt.internal.ui.refactoring.RefactoringExecutionHelper.perform(RefactoringExecutionHelper.java:151)
	at org.eclipse.jdt.ui.refactoring.RenameSupport.perform(RenameSupport.java:198)

Any ideas on what's causing this error? Or maybe there's a better way to do this type of refactoring? Thanks in advance!

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Re: Rename package programmatically [message #1229591 is a reply to message #1227099]

Thu, 09 January 2014 19:36

Stephan Herrmann

Messages: 1853
Registered: July 2009

Senior Member

Looking at the referenced line in RefactoringExecutionHelper, I see:

		Assert.isTrue(Display.getCurrent() != null);

Are you trying to run your operation in a headless environment?

Stephan

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Re: Rename package programmatically [message #1229614 is a reply to message #1229591]

Thu, 09 January 2014 20:43

Rick Crawford

Messages: 6
Registered: July 2009

Junior Member

Thanks for the response. If by 'headless' you mean no UI (running it outside of Eclipse), I'm not running headless. I'm trying to kick this operation off from w/in Eclipse from a custom wizard.

The wizard uses standard JDT functions to implement the import operation. This piece is intended to apply package renaming (refactoring) based on the package name that the user entered as he/she filled out pages w/in the wizard.

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Re: Rename package programmatically [message #1229634 is a reply to message #1229614]

Thu, 09 January 2014 21:40

Stephan Herrmann

Messages: 1853
Registered: July 2009

Senior Member

Hm, if you're running the code from a wizard you should definitely have a display initialized.
Ah, wait, I mixed getCurrent() with getDefault(). If you look at Display.getCurrent() it actually tells you, that you must run this on the UI thread. So the recommended way would be to wrap your operation in a org.eclipse.ui.progress.UIJob.
HTH
Stephan

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