67 lines
1.6 KiB
Java
67 lines
1.6 KiB
Java
package xyz.zhouxy.plusone.util;
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import java.util.Map;
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import java.util.Objects;
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import java.util.concurrent.ConcurrentHashMap;
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public abstract class Enumeration<T extends Enumeration<T>> {
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protected final int value;
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protected final String name;
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protected Enumeration(int value, String name) {
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this.value = value;
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this.name = name;
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}
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public int getValue() {
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return value;
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}
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public String getName() {
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return name;
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}
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@Override
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public int hashCode() {
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return Objects.hash(value);
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}
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@Override
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public boolean equals(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 value == other.value;
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}
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@Override
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public String toString() {
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StringBuilder builder = new StringBuilder();
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builder.append("[").append(value).append(": ").append(name).append("]");
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return builder.toString();
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}
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protected static final class EnumerationValuesHolder<T extends Enumeration<T>> {
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private final Map<Integer, T> constants = new ConcurrentHashMap<>();
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@SafeVarargs
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public EnumerationValuesHolder(T... values) {
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for (T value : values) {
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put(value);
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}
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}
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private void put(T constant) {
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this.constants.put(constant.getValue(), constant);
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}
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public T get(int value) {
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return this.constants.get(value);
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}
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}
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}
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