GMF Troubleshooting 6

GMF

1. GMF Troubleshooting
2. GMF Troubleshooting 2
3. GMF Troubleshooting 3
4. GMF Troubleshooting 4
5. GMF Troubleshooting 5
6. GMF Troubleshooting 6
7. GMF Troubleshooting 7
8. GMF Troubleshooting 8
9. GMF Troubleshooting 9

org.eclipse.emf.ecore.resource.impl.ResourceSetImpl$1DiagnosticWrappedException: java.net.MalformedURLException: unknown protocol: c

This exception can appear when trying to create a URI of the wrong type (the 'c' is from 'c:/foo/bar.txt'):

IFile target = project.getFile("bar.txt");
ResourceSet resSet = new ResourceSetImpl();          
Resource res = resSet.getResource(URI.createURI(target.getLocation().toString()), true);

The solution is to use createFileURI instead:

Resource res = resSet.getResource(URI.createFileURI(target.getLocation().toString()), true);

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Converting from an IFile to an EMF resource in order to load a diagram file programatically

The code is strikingly similar to that above

IFile target = project.getFile("EclipseTestCase.iaml");
ResourceSet resSet = new ResourceSetImpl();          
Resource res = resSet.getResource(URI.createPlatformResourceURI(target.getFullPath().toString(), false), true);
IamlDiagramEditorUtil.openDiagram( res );

Note how it needs to use createPlatformResourceURI(): This is because openDiagram() can only load project-relative paths.

You can see this code implemented in the Eclipse IAML plugin. Also see converting a Resource back into an IFile.