Merge branch 'develop'

Author: Psilo

pom.xml

@@ -10,7 +10,7 @@
 
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>jre-utils</artifactId>
-	<version>0.1.7</version>
+	<version>0.1.8</version>
 	<name>JreUtils</name>
 	<packaging>jar</packaging>
 

src/main/java/info/unterrainer/commons/jreutils/SetIntersection.java

@@ -0,0 +1,34 @@
+package info.unterrainer.commons.jreutils;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import lombok.Data;
+import lombok.RequiredArgsConstructor;
+import lombok.experimental.SuperBuilder;
+
+@Data
+@RequiredArgsConstructor
+@SuperBuilder()
+public class SetIntersection {
+
+	private final Set<String> before;
+	private final Set<String> after;
+
+	private final Set<String> create;
+	private final Set<String> delete;
+	private final Set<String> leave;
+
+	public static SetIntersection of(final Set<String> before, final Set<String> after) {
+		Set<String> create = new HashSet<>(before);
+		create.removeAll(after);
+
+		Set<String> delete = new HashSet<>(after);
+		delete.removeAll(before);
+
+		Set<String> leave = new HashSet<>(before);
+		leave.removeAll(create);
+
+		return new SetIntersection(before, after, create, delete, leave);
+	}
+}