1 files changed, 94 insertions, 0 deletions
diff --git a/src/net/sourceforge/plantuml/cucadiagram/EntityUtils.java b/src/net/sourceforge/plantuml/cucadiagram/EntityUtils.java
new file mode 100644
index 0000000..db1fda3
--- /dev/null
+++ b/src/net/sourceforge/plantuml/cucadiagram/EntityUtils.java
@@ -0,0 +1,94 @@
+/* ========================================================================
+ * PlantUML : a free UML diagram generator
+ * ========================================================================
+ *
+ * (C) Copyright 2009-2014, Arnaud Roques
+ *
+ * Project Info:  http://plantuml.sourceforge.net
+ * 
+ * This file is part of PlantUML.
+ *
+ * Licensed under The MIT License (Massachusetts Institute of Technology License)
+ * 
+ * See http://opensource.org/licenses/MIT
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+ * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ *
+ * Original Author:  Arnaud Roques
+ */
+package net.sourceforge.plantuml.cucadiagram;
+
+
+public abstract class EntityUtils {
+
+	public static boolean groupRoot(IGroup g) {
+		if (g == null) {
+			throw new IllegalStateException();
+		}
+		return g instanceof GroupRoot;
+	}
+
+	private static boolean isParent(IGroup groupToBeTested, IGroup parentGroup) {
+		if (groupToBeTested.isGroup() == false) {
+			// Very strange!
+			return false;
+		}
+		if (groupToBeTested.isGroup() == false) {
+			throw new IllegalArgumentException();
+		}
+		while (EntityUtils.groupRoot(groupToBeTested) == false) {
+			if (groupToBeTested == parentGroup) {
+				return true;
+			}
+			groupToBeTested = groupToBeTested.getParentContainer();
+			if (groupToBeTested.isGroup() == false) {
+				throw new IllegalStateException();
+			}
+		}
+		return false;
+	}
+
+	public static boolean isPureInnerLink12(IGroup group, Link link) {
+		if (group.isGroup() == false) {
+			throw new IllegalArgumentException();
+		}
+		final IEntity e1 = link.getEntity1();
+		final IEntity e2 = link.getEntity2();
+		final IGroup group1 = e1.getParentContainer();
+		final IGroup group2 = e2.getParentContainer();
+		if (isParent(group1, group) && isParent(group2, group)) {
+			return true;
+		}
+		return false;
+	}
+
+	public static boolean isPureInnerLink3(IGroup group, Link link) {
+		if (group.isGroup() == false) {
+			throw new IllegalArgumentException();
+		}
+		final IEntity e1 = link.getEntity1();
+		final IEntity e2 = link.getEntity2();
+		final IGroup group1 = e1.getParentContainer();
+		final IGroup group2 = e2.getParentContainer();
+		if (isParent(group2, group) == isParent(group1, group)) {
+			return true;
+		}
+		return false;
+	}
+}