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1 | // Comparator.java |
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2 | // |
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3 | // (c) 1999-2001 PAL Development Core Team |
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4 | // |
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5 | // This package may be distributed under the |
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6 | // terms of the Lesser GNU General Public License (LGPL) |
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7 | |
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8 | package de.ugoe.cs.autoquest.tasktrees.alignment.pal.util; |
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9 | |
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10 | /** |
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11 | * interface for an object that can compare other objects for the |
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12 | * purposes of ordering them. |
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13 | * This interface is analogous to the Comparator interface in |
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14 | * Java 1.2 and higher, and it should be superceded by the collections |
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15 | * framework when PAL is moved to 1.2 or higher. |
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16 | * |
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17 | * @version $Id: Comparator.java,v 1.2 2001/07/13 14:39:13 korbinian Exp $ |
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18 | * |
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19 | * @author Alexei Drummond |
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20 | */ |
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21 | public interface Comparator |
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22 | { |
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23 | /** |
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24 | * Returns a number representing the ordering relationship that |
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25 | * the two objects have. |
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26 | * A negative number indicates that the first object is "smaller" than |
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27 | * the second object, a positive number means it is "larger" and zero |
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28 | * indicates that the objects are equal. |
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29 | */ |
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30 | int compare(Object o1, Object o2); |
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31 | |
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32 | /** |
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33 | * Returns true if the two objects are equal. |
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34 | */ |
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35 | boolean equals(Object o1, Object o2); |
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36 | } |
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