Add method removeEqual to Entity

zacfeng · Aug 23, 2014 · 359b490 · 359b490
1 parent d14ac90
commit 359b490
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/src/main/java/com/xiaoleilu/hutool/db/Entity.java b/src/main/java/com/xiaoleilu/hutool/db/Entity.java
@@ -6,6 +6,7 @@
 import java.sql.Time;
 import java.sql.Timestamp;
 import java.util.HashMap;
+import java.util.Map.Entry;
 
 import com.xiaoleilu.hutool.Conver;
 import com.xiaoleilu.hutool.InjectUtil;
@@ -106,6 +107,21 @@ public Entity parse(Object vo) {
 		return this;
 	}
 
+	/**
+	 * 与给定实体对比并去除相同的部分<br>
+	 * 此方法用于在更新操作时避免所有字段被更新，跳过不需要更新的字段
+	 * version from 2.0.0
+	 * @param entity
+	 */
+	public <T extends Entity> void removeEqual(T entity) {
+		for(Entry<String, Object> entry : entity.entrySet()) {
+			final Object value = this.get(entry.getKey());
+			if(null != value && value.equals(entry.getValue())) {
+				this.remove(entry.getKey());
+			}
+		}
+	}
+
 	//-------------------------------------------------------------------- 特定类型值
 	/**
 	 * 设置列