forked from plusone/plusone-commons
106 lines
3.0 KiB
Java
106 lines
3.0 KiB
Java
/*
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* Copyright 2022-2023 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package xyz.zhouxy.plusone.commons.util;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Map;
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import java.util.Objects;
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import java.util.function.Function;
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import java.util.stream.Collectors;
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import org.apache.commons.lang3.StringUtils;
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import com.google.common.base.Preconditions;
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import xyz.zhouxy.plusone.commons.annotation.StaticFactoryMethod;
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/**
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* 枚举类
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*/
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public abstract class Enumeration<T extends Enumeration<T>> implements Comparable<T> {
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protected final int id;
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protected final String name;
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protected Enumeration(final int id, final String name) {
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Preconditions.checkArgument(StringUtils.isNotBlank(name), "Name of enumeration must has text.");
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this.id = id;
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this.name = name;
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}
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public final int getId() {
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return id;
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}
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public final String getName() {
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return name;
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}
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@Override
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public final int compareTo(final T o) {
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return Integer.compare(this.id, o.id);
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}
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@Override
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public final int hashCode() {
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return Objects.hash(id);
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}
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@Override
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public final boolean equals(final Object obj) {
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if (this == obj)
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return true;
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if (obj == null)
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return false;
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if (getClass() != obj.getClass())
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return false;
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Enumeration<?> other = (Enumeration<?>) obj;
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return id == other.id;
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}
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@Override
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public final String toString() {
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return getClass().getSimpleName() + '(' + id + ":" + name + ')';
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}
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protected static final class ValueSet<T extends Enumeration<T>> {
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private final Map<Integer, T> valueMap;
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private ValueSet(Map<Integer, T> valueMap) {
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this.valueMap = valueMap;
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}
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@SafeVarargs
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@StaticFactoryMethod(ValueSet.class)
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public static <T extends Enumeration<T>> ValueSet<T> of(T... values) {
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Map<Integer, T> temp = Arrays.stream(values)
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.collect(Collectors.toMap(Enumeration::getId, Function.identity()));
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return new ValueSet<>(Collections.unmodifiableMap(temp));
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}
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public T get(int id) {
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Preconditions.checkArgument(this.valueMap.containsKey(id), "[%s] 对应的值不存在", id);
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return this.valueMap.get(id);
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}
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public Collection<T> getValues() {
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return this.valueMap.values();
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}
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}
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}
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