01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.wicket.util.parse.metapattern;
18:
19: import java.util.List;
20:
21: /**
22: * Makes any MetaPattern optional by enclosing the pattern in an optionality
23: * expression. The expression will be something equivalent to "(?:<pattern>)?".
24: *
25: * @author Jonathan Locke
26: */
27: public final class OptionalMetaPattern extends MetaPattern {
28: private static final long serialVersionUID = 1L;
29:
30: /**
31: * Constructor
32: *
33: * @param pattern
34: */
35: public OptionalMetaPattern(final String pattern) {
36: super (pattern);
37: }
38:
39: /**
40: * Constructor
41: *
42: * @param pattern
43: * MetaPattern to make optional
44: */
45: public OptionalMetaPattern(final MetaPattern pattern) {
46: super (pattern);
47: }
48:
49: /**
50: * Constructor
51: *
52: * @param patterns
53: */
54: public OptionalMetaPattern(final List patterns) {
55: super (patterns);
56: }
57:
58: /**
59: * Constructor
60: *
61: * @param patterns
62: */
63: public OptionalMetaPattern(final MetaPattern[] patterns) {
64: super (patterns);
65: }
66:
67: /**
68: * @return String representation of this pattern
69: */
70: public String toString() {
71: return "(?:" + super .toString() + ")?";
72: }
73: }
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