2 * SonarQube, open source software quality management tool.
3 * Copyright (C) 2008-2014 SonarSource
4 * mailto:contact AT sonarsource DOT com
6 * SonarQube is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 3 of the License, or (at your option) any later version.
11 * SonarQube is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 package org.sonar.plugins.core.issue.tracking;
23 * Equivalence function for a {@link Sequence}.
25 public interface SequenceComparator<S extends Sequence> {
28 * Compare two items to determine if they are equivalent.
30 boolean equals(S a, int ai, S b, int bi);
33 * Get a hash value for an item in a sequence.
35 * If two items are equal according to this comparator's
36 * {@link #equals(Sequence, int, Sequence, int)} method,
37 * then this hash method must produce the same integer result for both items.
38 * However not required to have different hash values for different items.
40 int hash(S seq, int i);