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/* |
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* This file is part of Araknemu. |
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* |
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* Araknemu is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* Araknemu is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with Araknemu. If not, see <https://www.gnu.org/licenses/>. |
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* |
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* Copyright (c) 2017-2022 Vincent Quatrevieux |
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*/ |
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package fr.quatrevieux.araknemu.game.fight.castable; |
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import fr.quatrevieux.araknemu.game.fight.fighter.FighterData; |
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import fr.quatrevieux.araknemu.game.fight.map.BattlefieldCell; |
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import fr.quatrevieux.araknemu.game.spell.effect.SpellEffect; |
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import org.checkerframework.checker.nullness.qual.Nullable; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.Collections; |
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/** |
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* Perform target resolution for a casted effect |
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*/ |
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public final class CastTargetResolver { |
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/** |
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* Utility class : disable constructor |
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*/ |
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private CastTargetResolver() {} |
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/** |
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* Resolve targets of an effect |
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* |
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* @param caster The action caster |
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* @param target The target cell |
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* @param action Action to perform |
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* @param effect The effect to resolve |
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* |
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* @return List of fighters |
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* |
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* @see fr.quatrevieux.araknemu.game.spell.effect.target.EffectTarget |
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*/ |
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public static <F extends FighterData> Collection<F> resolveFromEffect(F caster, BattlefieldCell target, Castable action, SpellEffect effect) { |
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if (effect.target().onlyCaster()) { |
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return Collections.singleton(caster); |
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} |
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if (action.constraints().freeCell()) { |
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return Collections.emptyList(); |
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} |
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return resolveFromEffectArea(caster, target, effect); |
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} |
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/** |
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* Perform resolution from effect target and effect area |
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*/ |
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@SuppressWarnings("cast.unsafe") // @Nullable cast cause a compiler crash on java 8 |
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private static <F extends FighterData> Collection<F> resolveFromEffectArea(F caster, BattlefieldCell target, SpellEffect effect) { |
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// Use lazy instantiation and do not use stream API to optimise memory allocations |
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1 |
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F firstTarget = null; |
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1 |
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Collection<F> targets = null; |
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for (BattlefieldCell cell : effect.area().resolve(target, caster.cell())) { |
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final @Nullable F resolvedTarget = (/*@Nullable*/ F) cell.fighter(); |
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if (resolvedTarget == null || !effect.target().test(caster, resolvedTarget)) { |
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continue; |
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} |
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// Found the first target |
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1 |
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if (firstTarget == null) { |
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firstTarget = resolvedTarget; |
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continue; |
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} |
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// Multiple targets are found : instantiate the collection |
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if (targets == null) { |
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targets = new ArrayList<>(); |
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targets.add(firstTarget); |
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} |
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targets.add(resolvedTarget); |
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} |
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// There is multiple targets |
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1 |
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if (targets != null) { |
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return targets; |
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} |
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// There is only one target : create a singleton |
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if (firstTarget != null) { |
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return Collections.singleton(firstTarget); |
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} |
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// No targets are resolved |
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return Collections.emptyList(); |
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} |
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} |
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Arakne /
Araknemu
