Description Robert Konigsberg 2007-09-07 16:03:01 EDT

The code that eventually calls NameLookup is trying to convert the IBinding of a PackageBindingNode to an IJavaElement using binding.getJavaElement.

In this particular case, the call stack for the ASTVisitor that found this PackageBindingNode is:
* CompilationUnit
* ImportDeclaration
* QualifiedName (com.example.foo.bar.AClass)
* QualifiedName(com.example.foo.bar)
* QualifiedName(com.example.foo)


According to the javadoc for NameLookup.findPackageFragments(String, boolean, boolean), it should return the package fragments, or null if none are found. That said, it should never return an empty array.

I've snipped some of the code out of the method.

			Object value = this.packageFragments.get(splittedName); // line 534
			if (value == null)
				return null;
			if (value instanceof PackageFragmentRoot) {
				return new IPackageFragment[] {((PackageFragmentRoot) value).getPackageFragment(splittedName)};
			} else {
				IPackageFragmentRoot[] roots = (IPackageFragmentRoot[]) value;
				IPackageFragment[] result = new IPackageFragment[roots.length]; // line 561
				for (int i= 0; i < roots.length; i++) {
					result[i] = ((PackageFragmentRoot) roots[i]).getPackageFragment(splittedName);
				}
				return result;
			}

Here's what happens when I call QualifiedName(com.example.foo).resolveBinding().getJavaElement():

value on line 534 is not null, but it's IPackageFragmentRoot[0].
result on line 561 is turned into IPackageFragment[0], which is returned, and invalid.
Now, the entire project does not compile, so maybe that's a hint as to why I'm finding this problem. Dunno.