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The OpenTripPlanner multimodal journey planning system

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/* This program 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 program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see . */

package org.opentripplanner.routing.util;

/**
 * Interface for something that generates integer identifiers.
 * 
 * @author avi
 */
public interface UniqueIdGenerator {
    
    /**
     * Generates the identifier. May consider the element.
     * 
     * @param elem
     * @return
     */
    public int getId(T elem);
}