org.cristalise.kernel.lifecycle.instance.Loop Maven / Gradle / Ivy

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/**
 * This file is part of the CRISTAL-iSE kernel.
 * Copyright (c) 2001-2015 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;

public class Loop extends XOrSplit {

    public Loop() {
        super();
    }

    @Override
    public boolean loop() {
        return true;
    }

    @Override
    public void followNext(Next activeNext, AgentPath agent, ItemPath itemPath, Object locker) throws InvalidDataException {
        WfVertex v = activeNext.getTerminusVertex();
        if (!isInPrev(v))
            v.run(agent, itemPath, locker);
        else {
            v.reinit(getID());
            v.run(agent, itemPath, locker);
        }
    }

    @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;
    }
}