CompilationUnit buildCompilationUnit(BuildContext file) {
IJavaProject javaProject = JavaCore.create(file.getFile().getProject());
ASTParser p = ASTParser.newParser(JavaConstants.AST_LEVEL);
p.setProject(javaProject);
p.setSource(file.getContents());
p.setResolveBindings(true);
p.setKind(ASTParser.K_COMPILATION_UNIT);
p.setUnitName(file.getFile().getName());
return (CompilationUnit) p.createAST(null);
}