forked from fanruan/design
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* commit '42397f19d16b2dbb9abb74eeed2c8ec355a0f72d': updated REPORT-68607 数据连接全量保存改为增量保存bugfix/10.0
superman
3 years ago
3 changed files with 136 additions and 11 deletions
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package com.fr.design.data; |
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import org.jetbrains.annotations.NotNull; |
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import java.util.LinkedHashMap; |
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import java.util.Map; |
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/** |
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* @author rinoux |
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* @version 10.0 |
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* Created by rinoux on 2022/3/28 |
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*/ |
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public final class MapCompareUtils { |
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/** |
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* 对比两个map 查找出相比orig,other中有哪些是新增的、删除的或者被修改的,并分别进行处理 |
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* |
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* @param orig 原始map |
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* @param other 参考的新map |
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* @param eventHandler 有区别时的事件处理器 |
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* @param <K> K |
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* @param <V> V |
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*/ |
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public static <K, V> void contrastMapEntries(@NotNull Map<K, V> orig, @NotNull Map<K, V> other, @NotNull EventHandler<K, V> eventHandler) { |
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Map<K, V> copiedOrig = new LinkedHashMap<>(orig); |
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other.forEach((k, v) -> { |
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V existedV = copiedOrig.remove(k); |
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if (existedV != null) { |
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if (!v.equals(existedV)) { |
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eventHandler.on(EntryEventKind.UPDATED, k, v); |
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} |
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} else { |
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eventHandler.on(EntryEventKind.ADDED, k, v); |
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} |
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}); |
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copiedOrig.forEach((k, v) -> eventHandler.on(EntryEventKind.REMOVED, k, v)); |
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} |
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public interface EventHandler<K, V> { |
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void on(EntryEventKind entryEventKind, K k, V v); |
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} |
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public enum EntryEventKind { |
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ADDED, |
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REMOVED, |
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UPDATED; |
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} |
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} |
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package com.fr.design.data; |
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import org.junit.Assert; |
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import org.junit.Test; |
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import java.util.LinkedHashMap; |
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import java.util.Map; |
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/** |
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* @author rinoux |
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* @version 10.0 |
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* Created by rinoux on 2022/3/28 |
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*/ |
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public class MapCompareUtilsTest { |
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@Test |
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public void contrastMapEntries() { |
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Map<String, String> orig = new LinkedHashMap<>(); |
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orig.put("aaa", "aaa"); |
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orig.put("bbb", "bbb"); |
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orig.put("ccc", "ccc"); |
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orig.put("ddd", "ddd"); |
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Map<String, String> other = new LinkedHashMap<>(); |
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other.put("aaa", "111"); |
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other.put("bbb", "bbb"); |
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other.put("ccc", "ccc"); |
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other.put("eee", "eee"); |
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MapCompareUtils.contrastMapEntries(orig, other, new MapCompareUtils.EventHandler<String, String>() { |
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@Override |
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public void on(MapCompareUtils.EntryEventKind entryEventKind, String s, String s2) { |
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switch (entryEventKind) { |
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case UPDATED: |
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Assert.assertEquals(s, "aaa"); |
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Assert.assertEquals(s2, "111"); |
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break; |
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case REMOVED: |
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Assert.assertEquals(s, "ddd"); |
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break; |
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case ADDED: |
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Assert.assertEquals(s, "eee"); |
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Assert.assertEquals(s2, "eee"); |
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break; |
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default: |
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Assert.fail(); |
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} |
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} |
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}); |
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} |
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} |
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