001/*
002 * (C) Copyright 2007 Nuxeo SAS (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Nuxeo - initial API and implementation
016 *
017 * $Id$
018 */
019
020package org.nuxeo.ecm.core.search.api.client.querymodel;
021
022/**
023 * A very minimal escaper: does double quotes (putting just one is incorrect), +, - and !
024 *
025 * @author <a href="mailto:gracinet@nuxeo.com">Georges Racinet</a>
026 */
027// XXX this escaper does not seem to be doing an accurate job for VCS
028public class LuceneMinimalEscaper implements Escaper {
029
030    @Override
031    public String escape(String s) {
032        StringBuilder sb = new StringBuilder();
033        for (int i = 0; i < s.length(); i++) {
034            char c = s.charAt(i);
035            if (c == '+' || c == '-' || c == '!' || c == '"') {
036                sb.append('\\');
037            }
038            sb.append(c);
039        }
040        return sb.toString();
041    }
042
043}