51 lines
1.6 KiB
Java
51 lines
1.6 KiB
Java
/*
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* PlotSquared, a land and world management plugin for Minecraft.
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* Copyright (C) IntellectualSites <https://intellectualsites.com>
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* Copyright (C) IntellectualSites team and contributors
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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
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* GNU 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 <https://www.gnu.org/licenses/>.
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*/
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package com.plotsquared.core.collection;
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import java.util.Map;
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import java.util.NavigableMap;
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import java.util.Random;
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import java.util.TreeMap;
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public class SimpleRandomCollection<E> extends RandomCollection<E> {
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private final NavigableMap<Double, E> map = new TreeMap<>();
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private double total = 0;
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public SimpleRandomCollection(Map<E, Double> weights, Random random) {
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super(weights, random);
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for (Map.Entry<E, Double> entry : weights.entrySet()) {
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add(entry.getValue(), entry.getKey());
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}
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}
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public void add(double weight, E result) {
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if (weight <= 0) {
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return;
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}
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total += weight;
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map.put(total, result);
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}
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public E next() {
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return map.ceilingEntry(random.nextDouble()).getValue();
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}
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}
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