At level 8 a cleric with the death domain gains the following feature:
Death’s Embrace (Ex): At 8th level, you heal damage instead of taking damage from channeled negative energy. If the channeled negative energy targets undead, you heal hit points just like undead in the area.
So does that mean a cleric with the death domain is healed by both positive AND negative energy channeling, or does this in effect make the cleric react to positive energy like an undead and take damage? Further, is that cleric affected by healing/harm spells in the same manner?