64 lines
1.7 KiB
Java
64 lines
1.7 KiB
Java
/*
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* Copyright (C) 2014 Alfons Wirtz
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* website www.freerouting.net
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License at <http://www.gnu.org/licenses/>
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* for more details.
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*
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* IdNoGenerator.java
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*
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* Created on 2. Juni 2003, 13:43
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*/
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package eu.mihosoft.freerouting.board;
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/**
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* Creates unique Item identication nunbers.
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*
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* @author Alfons Wirtz
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*/
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public class ItemIdNoGenerator implements eu.mihosoft.freerouting.datastructures.IdNoGenerator, java.io.Serializable
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{
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/**
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* Creates a new ItemIdNoGenerator
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*/
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public ItemIdNoGenerator()
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{
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}
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/**
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* Create a new unique identification number.
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* Use eventually the id_no generater from the host system
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* for syncronisation
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*/
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public int new_no()
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{
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if (last_generated_id_no >= c_max_id_no)
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{
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System.out.println("IdNoGenerator: danger of overflow, please regenerate id numbers from scratch!");
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}
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++last_generated_id_no;
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return last_generated_id_no;
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}
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/**
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* Return the maximum generated id number so far.
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*/
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public int max_generated_no()
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{
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return last_generated_id_no;
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}
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private int last_generated_id_no = 0;
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static final private int c_max_id_no = Integer.MAX_VALUE / 2;
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}
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