com.g2forge.alexandria.java.associative.map.HMap Maven / Gradle / Ivy

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Standard Java library and the basis of the ${alexandria.name} project.

There is a newer version: 0.0.18

package com.g2forge.alexandria.java.associative.map;

import java.util.Collections;
import java.util.Map;
import java.util.function.Function;

import com.g2forge.alexandria.java.marker.Helpers;

import lombok.experimental.UtilityClass;

@Helpers
@UtilityClass
public class HMap {
	public static  V createOrGet(Map map, K key, Function function) {
		if (map.containsKey(key)) return map.get(key);

		final V retVal = function.apply(key);
		map.put(key, retVal);
		return retVal;
	}

	public static  Map empty() {
		return Collections.emptyMap();
	}
}