/**
* @param binding must be correspond to a type, method or field declaration
* @return the file that contains the declaration of given binding.
*/
public IFile getDeclaringFileForBinding(final IBinding binding) {
assert binding.getKind() == IBinding.TYPE
|| binding.getKind() == IBinding.METHOD
|| binding.getKind() == IBinding.VARIABLE;
// check to see whether it is in the current file.
IFile file = searchLocallyForIFile(binding);
if (file != null) return file;
final IMember member = (IMember) binding.getJavaElement();
if (member != null) {
final ICompilationUnit unit = member.getCompilationUnit();
return (IFile) unit.getResource();
} else {
final ITypeBinding type = getDeclaringClass(binding);
assert type.isTopLevel() : "type must be top-level type"; // $NON-NLS-1$
ICompilationUnit unit = _typeBinding2ModelCompUnit.get(type);
if (unit != null) return (IFile) unit.getResource();
final String qname = type.getQualifiedName();
unit = getICompilationUnitForTopLevelType(qname);
if (unit == null) return null;
return (IFile) unit.getResource();
}
}
/**
* @param binding a type, method or field binding.
* @return the top-level type binding that declares <code>binding</code> or itself if it is
* already one.
*/
protected static ITypeBinding getDeclaringClass(final IBinding binding) {
assert binding != null : "binding cannot be null"; // $NON-NLS-1$
ITypeBinding aTypeBinding = null;
switch (binding.getKind()) {
case IBinding.TYPE:
aTypeBinding = (ITypeBinding) binding;
break;
case IBinding.METHOD:
aTypeBinding = ((IMethodBinding) binding).getDeclaringClass();
break;
case IBinding.VARIABLE:
aTypeBinding = ((IVariableBinding) binding).getDeclaringClass();
break;
default:
throw new IllegalStateException(
"unrecognized binding type " + binding.getKind()); // $NON-NLS-1$
}
if (aTypeBinding == null) return null;
while (!aTypeBinding.isTopLevel()) {
aTypeBinding = aTypeBinding.getDeclaringClass();
}
return aTypeBinding;
}
