001/*
002 * (C) Copyright 2007 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.core.search.api.client.querymodel;
023
024/**
025 * A very minimal escaper: does double quotes (putting just one is incorrect), +, - and !
026 *
027 * @author <a href="mailto:gracinet@nuxeo.com">Georges Racinet</a>
028 */
029// XXX this escaper does not seem to be doing an accurate job for VCS
030public class LuceneMinimalEscaper implements Escaper {
031
032    @Override
033    public String escape(String s) {
034        StringBuilder sb = new StringBuilder();
035        for (int i = 0; i < s.length(); i++) {
036            char c = s.charAt(i);
037            if (c == '+' || c == '-' || c == '!' || c == '"') {
038                sb.append('\\');
039            }
040            sb.append(c);
041        }
042        return sb.toString();
043    }
044
045}