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package mage.abilities.effects;
import mage.abilities.Ability;
import mage.constants.CostModificationType;
import mage.game.Game;
/**
* Represents a {@link ContinuousEffect} that will modify the cost of a spell or
* ability on the stack. {@link mage.abilities.Ability Abilities} with this type
* of effect will be called once and only once from the
* {@link mage.abilities.AbilityImpl#activate(mage.game.Game, boolean) Ability.activate}
* method before costs are paid. After this time the costs are locked in and
* should not be modified further.
*
* @author maurer.it_at_gmail.com
*/
//20101001 - 601.2e/613.10
public interface CostModificationEffect extends ContinuousEffect {
/**
* Called by the {@link ContinuousEffects#costModification(java.util.UUID, mage.abilities.Ability, mage.game.Game) ContinuousEffects.costModification}
* method.
*
* @param game The game for which this effect should be applied.
* @param source The source ability of this effect.
* @param abilityToModify The {@link mage.abilities.SpellAbility} or {@link Ability} which should be modified.
* @return
*/
boolean apply ( Game game, Ability source, Ability abilityToModify );
/**
* Called by the {@link ContinuousEffects#costModification(mage.abilities.Ability, mage.game.Game) ContinuousEffects.costModification}
* method.
*
* @param abilityToModify The ability to possibly modify.
* @param source The source ability of this effect.
* @param game The game for which this effect should be applied.
* @return
*/
boolean applies(Ability abilityToModify, Ability source, Game game);
/**
* Return the type of modification
* @return
*/
CostModificationType getModificationType();
}