SOTemplate::SOTemplate ()
{
}

void SOTemplate::push_back (SOElement const& r)
{
    // Ensure there is the enough space in the index mapping
    // table for all possible fields.
    //
	if (mIndex.empty())
    {
        // Unmapped indices will be set to -1
        //
		mIndex.resize (SField::getNumFields() + 1, -1);
    }

    // Make sure the field's index is in range
    //
    assert (r.e_field.getNum() < mIndex.size());

    // Make sure that this field hasn't already been assigned
    //
    assert(getIndex(r.e_field) == -1);
	
    // Add the field to the index mapping table
    //
    mIndex [r.e_field.getNum ()] = mTypes.size();

    // Append the new element.
    //
    mTypes.push_back (new SOElement (r));
}

int SOTemplate::getIndex (SField::ref f) const
{
    // The mapping table should be large enough for any possible field
    //
	assert (f.getNum() < mIndex.size());

    return mIndex[f.getNum()];
}