OTPPriorityQueue.java

/* 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 <http://www.gnu.org/licenses/>. */

package org.opentripplanner.common.pqueue;

public interface OTPPriorityQueue<T> {

    void insert(T payload, double key);

    void insert_or_dec_key(T payload, double key);

    double peek_min_key();

    T peek_min();

    T extract_min();

    int size();

    boolean empty();
}