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Egothor Software License version 1.00
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Copyright (C) 1997-2004 Leo Galambos.
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Copyright (C) 2002-2004 "Egothor developers"
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on behalf of the Egothor Project.
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This software is copyrighted by the "Egothor developers". If this
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license applies to a single file or document, the "Egothor developers"
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are the people or entities mentioned as copyright holders in that file
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or document. If this license applies to the Egothor project as a
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whole, the copyright holders are the people or entities mentioned in
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the file CREDITS. This file can be found in the same location as this
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license in the distribution.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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1. Redistributions of source code must retain the above copyright
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notice, the list of contributors, this list of conditions, and the
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2. Redistributions in binary form must reproduce the above copyright
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notice, the list of contributors, this list of conditions, and the
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disclaimer that follows these conditions in the documentation
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and/or other materials provided with the distribution.
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3. The name "Egothor" must not be used to endorse or promote products
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derived from this software without prior written permission. For
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written permission, please contact Leo.G@seznam.cz
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4. Products derived from this software may not be called "Egothor",
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nor may "Egothor" appear in their name, without prior written
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permission from Leo.G@seznam.cz.
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In addition, we request that you include in the end-user documentation
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provided with the redistribution and/or in the software itself an
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acknowledgement equivalent to the following:
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"This product includes software developed by the Egothor Project.
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http://egothor.sf.net/"
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE EGOTHOR PROJECT OR ITS CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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This software consists of voluntary contributions made by many
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individuals on behalf of the Egothor Project and was originally
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created by Leo Galambos (Leo.G@seznam.cz).
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package org.egothor.stemmer;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Iterator;
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import java.util.List;
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* The Reduce object is used to remove gaps in a Trie which stores a dictionary.
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* Constructor for the Reduce object.
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* Optimize (remove holes in the rows) the given Trie and return the
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* @param orig the Trie to optimize
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* @return the restructured Trie
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public Trie optimize(Trie orig) {
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List<CharSequence> cmds = orig.cmds;
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List<Row> rows = new ArrayList<Row>();
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List<Row> orows = orig.rows;
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int remap[] = new int[orows.size()];
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Arrays.fill(remap, -1);
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rows = removeGaps(orig.root, rows, new ArrayList<Row>(), remap);
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return new Trie(orig.forward, remap[orig.root], cmds, rows);
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List<Row> removeGaps(int ind, List<Row> old, List<Row> to, int remap[]) {
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remap[ind] = to.size();
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Row now = old.get(ind);
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Iterator<Cell> i = now.cells.values().iterator();
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for (; i.hasNext();) {
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if (c.ref >= 0 && remap[c.ref] < 0) {
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removeGaps(c.ref, old, to, remap);
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to.set(remap[ind], new Remap(now, remap));
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* This class is part of the Egothor Project
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class Remap extends Row {
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* Constructor for the Remap object
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* @param old Description of the Parameter
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* @param remap Description of the Parameter
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public Remap(Row old, int remap[]) {
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Iterator<Character> i = old.cells.keySet().iterator();
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for (; i.hasNext();) {
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Character ch = i.next();
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nc.ref = remap[nc.ref];