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Carrot2 search results clustering framework. Minimal functional subset (core algorithms and infrastructure, no document sources).

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/*
 * Carrot2 project.
 *
 * Copyright (C) 2002-2013, Dawid Weiss, Stanisław Osiński.
 * All rights reserved.
 *
 * Refer to the full license file "carrot2.LICENSE"
 * in the root folder of the repository checkout or at:
 * http://www.carrot2.org/carrot2.LICENSE
 */

package org.carrot2.text.suffixtree;

/**
 * A sequence of elements from which a {@link SuffixTree} can be built. Elements are
 * indexed with integers starting at position 0. Elements themselves must be represented
 * as integers, where equal values at different indices indicate equal objects, whatever
 * the underlying objects might be.
 */
public interface ISequence
{
    /**
     * Returns the number of elements in the sequence.
     */
    public int size();

    /**
     * Returns a unique integer code for object at index i (the first element
     * has 0 index).
     */
    public int objectAt(int i);
}