001
014
015 package com.liferay.portal.xml.xpath;
016
017 import com.liferay.portal.kernel.cache.Lifecycle;
018 import com.liferay.portal.kernel.cache.ThreadLocalCache;
019 import com.liferay.portal.kernel.cache.ThreadLocalCacheManager;
020
021 import java.util.HashMap;
022 import java.util.List;
023 import java.util.Map;
024 import java.util.regex.Matcher;
025 import java.util.regex.Pattern;
026
027 import org.jaxen.Context;
028 import org.jaxen.Function;
029 import org.jaxen.FunctionCallException;
030 import org.jaxen.Navigator;
031 import org.jaxen.function.StringFunction;
032
033
036 public class MatchesFunction implements Function {
037
038 public static Boolean evaluate(
039 Object stringArgument, Object regexArgument, Navigator navigator) {
040
041 String string = StringFunction.evaluate(stringArgument, navigator);
042 String regex = StringFunction.evaluate(regexArgument, navigator);
043
044 return evaluate(string, regex, 0, navigator);
045 }
046
047 public static Boolean evaluate(
048 Object stringArg, Object regexArgument, Object flagsArgument,
049 Navigator navigator) {
050
051 String string = StringFunction.evaluate(stringArg, navigator);
052 String regex = StringFunction.evaluate(regexArgument, navigator);
053 String flagsString = StringFunction.evaluate(flagsArgument, navigator);
054
055 int flags = 0;
056
057 for (int i = 0; i < flagsString.length(); i++) {
058 if (flagsString.charAt(i) == 'i') {
059 flags &= Pattern.CASE_INSENSITIVE;
060 }
061 else if (flagsString.charAt(i) == 'm') {
062 flags &= Pattern.MULTILINE;
063 }
064 else if (flagsString.charAt(i) == 's') {
065 flags &= Pattern.DOTALL;
066 }
067 else if (flagsString.charAt(i) == 'x') {
068 flags &= Pattern.COMMENTS;
069 }
070 }
071
072 return evaluate(string, regex, flags, navigator);
073 }
074
075 public static Boolean evaluate(
076 String string, String regex, int flags, Navigator navigator) {
077
078 ThreadLocalCache<Map<String, Pattern>> threadLocalPatterns =
079 ThreadLocalCacheManager.getThreadLocalCache(
080 Lifecycle.ETERNAL, MatchesFunction.class.getName());
081
082 Map<String, Pattern> patterns = threadLocalPatterns.get(
083 _THREAD_LOCAL_PATTERNS_KEY);
084
085 if (patterns == null) {
086 patterns = new HashMap<String, Pattern>();
087 }
088
089 Pattern pattern = patterns.get(regex);
090
091 if (pattern != null) {
092 Matcher matcher = pattern.matcher(string);
093
094 return matcher.find();
095 }
096
097 pattern = Pattern.compile(regex, flags);
098
099 patterns.put(regex, pattern);
100
101 threadLocalPatterns.put(_THREAD_LOCAL_PATTERNS_KEY, patterns);
102
103 Matcher matcher = pattern.matcher(string);
104
105 return matcher.find();
106 }
107
108 @Override
109 @SuppressWarnings("rawtypes")
110 public Object call(Context context, List arguments)
111 throws FunctionCallException {
112
113 if (arguments.size() == 2) {
114 return evaluate(
115 arguments.get(0), arguments.get(1), context.getNavigator());
116 }
117 else if ((arguments.size() == 3) && (arguments.get(2) != null)) {
118 return evaluate(
119 arguments.get(0), arguments.get(1), arguments.get(2),
120 context.getNavigator());
121 }
122
123 throw new FunctionCallException(
124 "matches() requires two or three arguments");
125 }
126
127 private static final String _THREAD_LOCAL_PATTERNS_KEY = "matches";
128
129 }