107 lines
2.9 KiB
Java
107 lines
2.9 KiB
Java
/*
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* This file is part of the L2J Mobius project.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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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* This program 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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jmobius.gameserver.model;
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import java.util.HashSet;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ScheduledFuture;
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import java.util.function.Predicate;
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import com.l2jmobius.gameserver.ThreadPoolManager;
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import com.l2jmobius.gameserver.model.actor.L2Character;
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import com.l2jmobius.gameserver.model.events.EventDispatcher;
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import com.l2jmobius.gameserver.model.events.impl.character.OnCreatureSee;
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/**
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* @author UnAfraid
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*/
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public class CreatureContainer
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{
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private final Set<Integer> _seen = ConcurrentHashMap.newKeySet();
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private final L2Character _owner;
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private final int _range;
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private ScheduledFuture<?> _task;
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private Predicate<L2Character> _condition = null;
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public CreatureContainer(L2Character owner, int range, Predicate<L2Character> condition)
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{
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_owner = owner;
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_range = range;
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_condition = condition;
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start();
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}
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public L2Character getOwner()
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{
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return _owner;
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}
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public int getRange()
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{
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return _range;
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}
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/**
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* Starts the task that scans for new creatures
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*/
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public void start()
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{
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if ((_task == null) || _task.isDone())
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{
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_task = ThreadPoolManager.getInstance().scheduleAiAtFixedRate(this::update, 1000L, 1000L);
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}
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}
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/**
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* @return {@code false} if the task could not be cancelled, typically because it has already completed normally; {@code true} otherwise
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*/
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public boolean stop()
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{
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return (_task != null) && !_task.isDone() && _task.cancel(false);
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}
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/**
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* Resets the creatures container, all previously seen creature will be discarded and next time update method is called will notify for each creature that owner sees!
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*/
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public void reset()
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{
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_seen.clear();
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}
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/**
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* Scans around the npc and notifies about new creature owner seen
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*/
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private void update()
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{
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final Set<Integer> verified = new HashSet<>();
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L2World.getInstance().forEachVisibleObjectInRange(_owner, L2Character.class, _range, creature ->
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{
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if ((_condition == null) || _condition.test(creature))
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{
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if (_seen.add(creature.getObjectId()))
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{
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EventDispatcher.getInstance().notifyEventAsync(new OnCreatureSee(_owner, creature), _owner);
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}
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verified.add(creature.getObjectId());
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}
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});
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_seen.retainAll(verified);
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}
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}
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