1 files changed, 130 insertions, 0 deletions
diff --git a/src/main/java/org/cristalise/kernel/lifecycle/instance/Loop.java b/src/main/java/org/cristalise/kernel/lifecycle/instance/Loop.java
new file mode 100644
index 0000000..d6a660e
--- /dev/null
+++ b/src/main/java/org/cristalise/kernel/lifecycle/instance/Loop.java
@@ -0,0 +1,130 @@
+/**
+ * This file is part of the CRISTAL-iSE kernel.
+ * Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * http://www.fsf.org/licensing/licenses/lgpl.html
+ */
+package org.cristalise.kernel.lifecycle.instance;
+import org.cristalise.kernel.common.InvalidDataException;
+import org.cristalise.kernel.graph.model.Vertex;
+import org.cristalise.kernel.graph.traversal.GraphTraversal;
+import org.cristalise.kernel.lookup.AgentPath;
+import org.cristalise.kernel.lookup.ItemPath;
+import org.cristalise.kernel.utils.Logger;
+
+/**
+ * @version $Revision: 1.35 $ $Date: 2005/05/10 15:14:54 $
+ * @author $Author: abranson $
+ */
+public class Loop extends XOrSplit
+{
+	/**
+	 * @see java.lang.Object#Object()
+	 */
+	public Loop()
+	{
+		super();
+	}
+	/**
+	 * @see org.cristalise.kernel.lifecycle.instance.WfVertex#loop()
+	 */
+	@Override
+	public boolean loop()
+	{
+		return true;
+	}
+	@Override
+	public void followNext(Next activeNext, AgentPath agent, ItemPath itemPath) throws InvalidDataException
+	{
+		WfVertex v = activeNext.getTerminusVertex();
+		if (!isInPrev(v))
+			v.run(agent, itemPath);
+		else
+		{
+			v.reinit(getID());
+			v.run(agent, itemPath);
+		}
+	}
+	/**
+	 * @throws InvalidDataException 
+	 * @see org.cristalise.kernel.lifecycle.instance.WfVertex#reinit(int)
+	 */
+	@Override
+	public void reinit(int idLoop) throws InvalidDataException
+	{
+		Logger.msg(8, "Loop.reinit");
+		if (idLoop == getID())
+			return;
+		else
+		{
+			Vertex[] outVertices = getOutGraphables();
+			for (int j = 0; j < outVertices.length; j++)
+			{
+				if (!isInPrev(outVertices[j]))
+					 ((WfVertex) outVertices[j]).reinit(idLoop);
+			}
+		}
+	}
+	/**
+	 * @see org.cristalise.kernel.lifecycle.instance.WfVertex#verify()
+	 */
+	@Override
+	public boolean verify()
+	{
+		boolean err = super.verify();
+		Vertex[] nexts = getOutGraphables();
+		Vertex[] anteVertices = GraphTraversal.getTraversal(getParent().getChildrenGraphModel(), this, GraphTraversal.kUp, false);
+		int k = 0;
+		int l = 0;
+		Vertex[] brothers = getParent().getChildren();
+		for (Vertex brother : brothers)
+			if (brother instanceof Loop)
+				l++;
+		for (Vertex next : nexts) {
+			for (Vertex anteVertice : anteVertices)
+				if (next.getID() == anteVertice.getID())
+					k++;
+		}
+		if (k != 1 && !(l > 1))
+		{
+			mErrors.add("bad number of pointing back nexts");
+			return false;
+		}
+		//        if (nexts.length>2) {
+		//            mErrors.add("you must only have 2 nexts");
+		//            return false;
+		//        }
+		return err;
+	}
+	private boolean isInPrev(Vertex vertex)
+	{
+		int id = vertex.getID();
+		Vertex[] anteVertices = GraphTraversal.getTraversal(getParent().getChildrenGraphModel(), this, GraphTraversal.kUp, false);
+		for (Vertex anteVertice : anteVertices) {
+			if (anteVertice.getID() == id)
+			{
+				return true;
+			}
+		}
+		return false;
+	}
+	@Override
+	public boolean isLoop()
+	{
+		return true;
+	}
+}