01: package org.apache.lucene.search.regex;
02:
03: /**
04: * Licensed to the Apache Software Foundation (ASF) under one or more
05: * contributor license agreements. See the NOTICE file distributed with
06: * this work for additional information regarding copyright ownership.
07: * The ASF licenses this file to You under the Apache License, Version 2.0
08: * (the "License"); you may not use this file except in compliance with
09: * the License. You may obtain a copy of the License at
10: *
11: * http://www.apache.org/licenses/LICENSE-2.0
12: *
13: * Unless required by applicable law or agreed to in writing, software
14: * distributed under the License is distributed on an "AS IS" BASIS,
15: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16: * See the License for the specific language governing permissions and
17: * limitations under the License.
18: */
19:
20: import org.apache.regexp.RE;
21: import org.apache.regexp.RegexpTunnel;
22:
23: /**
24: * Implementation tying <a href="http://jakarta.apache.org/regexp">Jakarta Regexp</a>
25: * to RegexQuery. Thanks to some internals of Jakarta Regexp, this
26: * has a solid {@link #prefix} implementation.
27: */
28: public class JakartaRegexpCapabilities implements RegexCapabilities {
29: private RE regexp;
30:
31: public void compile(String pattern) {
32: regexp = new RE(pattern);
33: }
34:
35: public boolean match(String string) {
36: return regexp.match(string);
37: }
38:
39: public String prefix() {
40: char[] prefix = RegexpTunnel.getPrefix(regexp);
41: return prefix == null ? null : new String(prefix);
42: }
43:
44: public boolean equals(Object o) {
45: if (this == o)
46: return true;
47: if (o == null || getClass() != o.getClass())
48: return false;
49:
50: final JakartaRegexpCapabilities that = (JakartaRegexpCapabilities) o;
51:
52: if (regexp != null ? !regexp.equals(that.regexp)
53: : that.regexp != null)
54: return false;
55:
56: return true;
57: }
58:
59: public int hashCode() {
60: return (regexp != null ? regexp.hashCode() : 0);
61: }
62: }
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