001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.util;
016    
017    import com.liferay.portal.kernel.concurrent.ConcurrentReferenceValueHashMap;
018    import com.liferay.portal.kernel.memory.FinalizeManager;
019    
020    import java.util.Map;
021    import java.util.regex.Matcher;
022    import java.util.regex.Pattern;
023    
024    /**
025     * @author Connor McKay
026     * @author Brian Wing Shun Chan
027     */
028    public class StringParserFragment {
029    
030            public static StringParserFragment create(String chunk) {
031                    StringParserFragment stringParserFragment = _stringParserFragments.get(
032                            chunk);
033    
034                    if (stringParserFragment == null) {
035                            stringParserFragment = new StringParserFragment(chunk);
036    
037                            _stringParserFragments.put(chunk, stringParserFragment);
038                    }
039    
040                    return stringParserFragment;
041            }
042    
043            public String getName() {
044                    return _name;
045            }
046    
047            public String getPattern() {
048                    return _pattern.toString();
049            }
050    
051            public String getToken() {
052                    return _token;
053            }
054    
055            public boolean isRaw() {
056                    return _raw;
057            }
058    
059            public boolean matches(String parameter) {
060                    Matcher matcher = _pattern.matcher(parameter);
061    
062                    return matcher.matches();
063            }
064    
065            protected StringParserFragment(String fragment) {
066                    if ((fragment == null) || (fragment.length() < 3)) {
067                            throw new IllegalArgumentException(
068                                    "Fragment is invalid: " + fragment);
069                    }
070    
071                    int index = fragment.indexOf(CharPool.COLON);
072    
073                    String name = null;
074    
075                    if (index < 0) {
076                            name = fragment.substring(1, fragment.length() - 1);
077    
078                            _pattern = _defaultPattern;
079                    }
080                    else {
081                            name = fragment.substring(1, index);
082                            String pattern = fragment.substring(
083                                    index + 1, fragment.length() - 1);
084    
085                            if (Validator.isNull(pattern)) {
086                                    throw new IllegalArgumentException(
087                                            "Pattern is null: " + fragment);
088                            }
089    
090                            _pattern = Pattern.compile(pattern);
091                    }
092    
093                    if (name.isEmpty()) {
094                            throw new IllegalArgumentException("Name is null: " + fragment);
095                    }
096    
097                    if (name.charAt(0) == CharPool.PERCENT) {
098                            name = name.substring(1);
099    
100                            if (name.isEmpty()) {
101                                    throw new IllegalArgumentException(
102                                            "Name is invalid: " + fragment);
103                            }
104    
105                            _raw = true;
106                    }
107                    else {
108                            _raw = false;
109                    }
110    
111                    _name = name;
112    
113                    _token = StringPool.OPEN_CURLY_BRACE.concat(_name).concat(
114                            StringPool.CLOSE_CURLY_BRACE);
115            }
116    
117            private static final Pattern _defaultPattern = Pattern.compile("[^/\\.]+");
118            private static final Map<String, StringParserFragment>
119                    _stringParserFragments = new ConcurrentReferenceValueHashMap<>(
120                            FinalizeManager.SOFT_REFERENCE_FACTORY);
121    
122            private final String _name;
123            private final Pattern _pattern;
124            private final boolean _raw;
125            private final String _token;
126    
127    }