Is it impossible to perform initialization before calling a superclass's constructor?

private MyObject(ComplexData data)
{
    super(data);
}

public static MyObject createMyObject(String someParameter)
{
    ComplexData data = XMLParser.createData(someParameter);
    return new MyObject(data);
}

public Subclass(String filename)
{
    super(loadFile(filename));
}

private static byte[] loadFile(String filename)
{
    // ...
}

public MyObject(String parm) {
    super(parseComplex(parm));
}

private static ComplexData parseComplex(String parm) {
    ....
    return new ComplexData(...);
}