com.hydraql.reflectasm.util.MapUtil Maven / Gradle / Ivy
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hydraql.reflectasm.util;
import java.util.AbstractMap;
import java.util.Map;
import java.util.function.Function;
/**
* @author [email protected] 2024/8/11 17:55
*/
public class MapUtil {
/**
* A temporary workaround for Java 8 specific performance issue JDK-8161372 .
* This class should be removed once we drop Java 8 support.
* @see https://bugs.openjdk.java.net/browse/JDK-8161372
*/
public static V computeIfAbsent(Map map, K key, Function mappingFunction) {
V value = map.get(key);
if (value != null) {
return value;
}
return map.computeIfAbsent(key, mappingFunction);
}
/**
* Map.entry(key, value) alternative for Java 8.
*/
public static Map.Entry entry(K key, V value) {
return new AbstractMap.SimpleImmutableEntry<>(key, value);
}
private MapUtil() {
}
}