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: */
18:
19: package org.apache.ivy.plugins.matcher;
20:
21: /**
22: * An abstract implementation of the pattern matcher providing base template methods
23: */
24: public abstract class AbstractPatternMatcher implements PatternMatcher {
25: private final String name;
26:
27: /**
28: * Create a new instance of a pattern matcher
29: *
30: * @param name
31: * the name of the pattern matcher. Never null.
32: */
33: public AbstractPatternMatcher(/* @NotNull */String name) {
34: this .name = name;
35: }
36:
37: public/* @NotNull */Matcher getMatcher(
38: /* @NotNull */String expression) {
39: if (expression == null) {
40: throw new NullPointerException();
41: }
42: if (ANY_EXPRESSION.equals(expression)) {
43: return AnyMatcher.INSTANCE;
44: }
45: return newMatcher(expression);
46: }
47:
48: public/* @NotNull */String getName() {
49: return name;
50: }
51:
52: /**
53: * Returns an instance of the implementation specific matcher.
54: *
55: * @param expression
56: * the string to be matched.
57: * @return the instance of the related matcher. Never null.
58: */
59: protected abstract/* @NotNull */Matcher newMatcher(
60: /* @NotNull */String expression);
61:
62: public String toString() {
63: return getName();
64: }
65: }
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