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package vc.thinker.utils;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.springframework.lang.Nullable;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
/**
* 枚举解析器 解析出多个枚举
*
* @author HeTongHao
* @since 2021/6/17 16:34
*/
public class ResolveMultipart<T, K> {
private final Map<K, List<T>> keyValueMap = Maps.newHashMap();
/**
* 构造
*
* @param values 枚举数组
* @param resolveKey 根据那个字段解析
*/
public ResolveMultipart(T[] values, Function<T, K> resolveKey) {
for (T value : values) {
keyValueMap.computeIfAbsent(resolveKey.apply(value), k -> Lists.newLinkedList()).add(value);
}
}
public ResolveMultipart(List<T> values, Function<T, K> resolveKey) {
for (T value : values) {
keyValueMap.computeIfAbsent(resolveKey.apply(value), k -> Lists.newLinkedList()).add(value);
}
}
@Nullable
public List<T> resolve(K key) {
return keyValueMap.get(key);
}
}