/**
* @param binding must be correspond to a type, method or field declaration.
* @return the compilation unit that contains the declaration of the given binding.
*/
public CompilationUnit getCompilationUnitForBinding(final IBinding binding) {
assert binding.getKind() == IBinding.TYPE
|| binding.getKind() == IBinding.METHOD
|| binding.getKind() == IBinding.VARIABLE;
CompilationUnit domUnit = searchLocallyForBinding(binding);
if (domUnit != null) return domUnit;
else {
final IMember member = (IMember) binding.getJavaElement();
final ICompilationUnit unit;
if (member != null) {
unit = member.getCompilationUnit();
} else {
final ITypeBinding typeBinding = getDeclaringClass(binding);
// binary type don't have compilation unit.
if (!typeBinding.isFromSource()) return null;
if (_typeBinding2ModelCompUnit.get(typeBinding) != null)
unit = _typeBinding2ModelCompUnit.get(typeBinding);
else {
final String qname = typeBinding.getQualifiedName();
unit = getICompilationUnitForTopLevelType(qname);
}
}
if (unit == null) return null;
final CompilationUnit astUnit = _modelCompUnit2astCompUnit.get(unit);
if (astUnit != null) return astUnit;
else {
// Note: very expensive operation. we are re-compiling a file with binding information.
final ASTParser parser = ASTParser.newParser(AST.JLS3);
parser.setResolveBindings(true);
parser.setBindingsRecovery(true);
parser.setSource(unit);
parser.setFocalPosition(0);
parser.setIgnoreMethodBodies(true);
CompilationUnit resultUnit = (CompilationUnit) parser.createAST(null);
_modelCompUnit2astCompUnit.put(unit, resultUnit);
return resultUnit;
}
}
}
