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Cristal-ise is a description-driven software platform originally developed to track the construction of the CMS ECAL detector of the LHC at CERN. This is its core library, known as the kernel, which manages business objects called Items. Items are entirely configured from data, called descriptions, held in other Items. Every change of a state in an Item is a consequence of an execution of an activity in that Item's lifecycle, meaning that Cristal-ise applications are completely traceable, even in their design. It also supports extensive versioning of Item description data, giving the system a high level of flexibility.

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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.stateMachine;

import java.util.HashMap;
import java.util.Map.Entry;
import java.util.Set;

import lombok.AccessLevel;
import lombok.Getter;
import lombok.Setter;

@Getter @Setter
public class State {

    int     id;
    String  name;
    /**
     * If true, this state deactivates the current activity and the lifecycle/workflow proceeds
     */
    boolean finished = false;

    @Setter(AccessLevel.NONE)
    HashMap possibleTransitions;

    public State() {
        possibleTransitions = new HashMap();
    }

    public State(int id, String name) {
        this();
        this.id = id;
        this.name = name;
    }

    protected void addPossibleTransition(Transition possibleTransition) {
        possibleTransitions.put(possibleTransition.getId(), possibleTransition);
    }

    public Set getPossibleTransitionIds() {
        return possibleTransitions.keySet();
    }

    public int getErrorTansitionId() {
        for (Entry entry : possibleTransitions.entrySet()) {
            if (entry.getValue().isErrorHandler()) return entry.getKey();
        }
        return -1;
    }

    @Override
    public String toString() {
        return name+"[id:"+id+"]";
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + id;
        return result;
    }

    @Override
    public boolean equals(Object other) {
        if (this == other)                  return true;
        if (other == null)                  return false;
        if (getClass() != other.getClass()) return false;
        if (id != ((State)other).id)        return false;

        return true;
    }
}