+++ /dev/null
-/*
- Egothor Software License version 1.00
- Copyright (C) 1997-2004 Leo Galambos.
- Copyright (C) 2002-2004 "Egothor developers"
- on behalf of the Egothor Project.
- All rights reserved.
-
- This software is copyrighted by the "Egothor developers". If this
- license applies to a single file or document, the "Egothor developers"
- are the people or entities mentioned as copyright holders in that file
- or document. If this license applies to the Egothor project as a
- whole, the copyright holders are the people or entities mentioned in
- the file CREDITS. This file can be found in the same location as this
- license in the distribution.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- 1. Redistributions of source code must retain the above copyright
- notice, the list of contributors, this list of conditions, and the
- following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright
- notice, the list of contributors, this list of conditions, and the
- disclaimer that follows these conditions in the documentation
- and/or other materials provided with the distribution.
- 3. The name "Egothor" must not be used to endorse or promote products
- derived from this software without prior written permission. For
- written permission, please contact Leo.G@seznam.cz
- 4. Products derived from this software may not be called "Egothor",
- nor may "Egothor" appear in their name, without prior written
- permission from Leo.G@seznam.cz.
-
- In addition, we request that you include in the end-user documentation
- provided with the redistribution and/or in the software itself an
- acknowledgement equivalent to the following:
- "This product includes software developed by the Egothor Project.
- http://egothor.sf.net/"
-
- THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- IN NO EVENT SHALL THE EGOTHOR PROJECT OR ITS CONTRIBUTORS BE LIABLE
- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
- OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
- IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- This software consists of voluntary contributions made by many
- individuals on behalf of the Egothor Project and was originally
- created by Leo Galambos (Leo.G@seznam.cz).
- */
-package org.egothor.stemmer;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Iterator;
-import java.util.List;
-
-/**
- * The Gener object helps in the discarding of nodes which break the reduction
- * effort and defend the structure against large reductions.
- */
-public class Gener extends Reduce {
- /**
- * Constructor for the Gener object.
- */
- public Gener() {}
-
- /**
- * Return a Trie with infrequent values occurring in the given Trie removed.
- *
- * @param orig the Trie to optimize
- * @return a new optimized Trie
- */
- @Override
- public Trie optimize(Trie orig) {
- List<CharSequence> cmds = orig.cmds;
- List<Row> rows = new ArrayList<Row>();
- List<Row> orows = orig.rows;
- int remap[] = new int[orows.size()];
-
- Arrays.fill(remap, 1);
- for (int j = orows.size() - 1; j >= 0; j--) {
- if (eat(orows.get(j), remap)) {
- remap[j] = 0;
- }
- }
-
- Arrays.fill(remap, -1);
- rows = removeGaps(orig.root, orows, new ArrayList<Row>(), remap);
-
- return new Trie(orig.forward, remap[orig.root], cmds, rows);
- }
-
- /**
- * Test whether the given Row of Cells in a Trie should be included in an
- * optimized Trie.
- *
- * @param in the Row to test
- * @param remap Description of the Parameter
- * @return <tt>true</tt> if the Row should remain, <tt>false
- * </tt> otherwise
- */
- public boolean eat(Row in, int remap[]) {
- int sum = 0;
- for (Iterator<Cell> i = in.cells.values().iterator(); i.hasNext();) {
- Cell c = i.next();
- sum += c.cnt;
- if (c.ref >= 0) {
- if (remap[c.ref] == 0) {
- c.ref = -1;
- }
- }
- }
- int frame = sum / 10;
- boolean live = false;
- for (Iterator<Cell> i = in.cells.values().iterator(); i.hasNext();) {
- Cell c = i.next();
- if (c.cnt < frame && c.cmd >= 0) {
- c.cnt = 0;
- c.cmd = -1;
- }
- if (c.cmd >= 0 || c.ref >= 0) {
- live |= true;
- }
- }
- return !live;
- }
-}
fnp / pylucene.git / blobdiff