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LootTable.java
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LootTable.java
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/*
* This file is part of SpongeAPI, licensed under the MIT License (MIT).
*
* Copyright (c) SpongePowered <https://www.spongepowered.org>
* Copyright (c) contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.spongepowered.api.util.weighted;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.Random;
import java.util.StringJoiner;
/**
* Represents a pool of tables which are rolled sequentially when retrieving
* entries.
*
* @param <T> The entry type
*/
public class LootTable<T> {
private final List<RandomObjectTable<T>> pool = new ArrayList<>();
/**
* Creates a new {@link LootTable}.
*/
public LootTable() {
}
/**
* Adds a table to the pool.
*
* @param table The new table
*/
public void addTable(final RandomObjectTable<T> table) {
this.pool.add(Objects.requireNonNull(table));
}
/**
* Adds all tables from the given {@link LootTable} to this LootTable's pool.
*
* @param other The other loot table
*/
public void addAll(final LootTable<T> other) {
this.pool.addAll(other.pool);
}
/**
* Removes a table from the pool.
*
* @param table The table to remove
* @return If the pool contained the table
*/
public boolean removeTable(final RandomObjectTable<T> table) {
return this.pool.remove(table);
}
/**
* Gets all tables in the pool.
*
* @return The tables
*/
public List<RandomObjectTable<T>> tables() {
return ImmutableList.copyOf(this.pool);
}
/**
* Clears all tables from the pool.
*/
public void clearPool() {
this.pool.clear();
}
/**
* Gets a List of objects as retrieved from all pools.
*
* @param rand The random object to use
* @return The retrieved entries
*/
public List<T> get(final Random rand) {
final List<T> results = Lists.newArrayList();
for (final RandomObjectTable<T> pool : this.pool) {
results.addAll(pool.get(rand));
}
return results;
}
@Override
public boolean equals(final Object o) {
if (o == this) {
return true;
}
if (!(o instanceof LootTable)) {
return false;
}
final LootTable<?> c = (LootTable<?>) o;
if (this.pool.size() != c.pool.size()) {
return false;
}
for (int i = 0; i < this.pool.size(); i++) {
if (!this.pool.get(i).equals(c.pool.get(i))) {
return false;
}
}
return true;
}
@Override
public int hashCode() {
int r = 1;
for (final RandomObjectTable<T> table : this.pool) {
r = r * 37 + table.hashCode();
}
return r;
}
@Override
public String toString() {
return new StringJoiner(", ", LootTable.class.getSimpleName() + "[", "]")
.add("pool=" + this.pool)
.toString();
}
}