| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.util; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.util.text.StringUtil; |
| import com.intellij.util.containers.ContainerUtil; |
| import org.jetbrains.annotations.Contract; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.List; |
| import java.util.Map; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import java.util.regex.PatternSyntaxException; |
| |
| public class PatternUtil { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.util.PatternUtil"); |
| |
| public static final Pattern NOTHING = Pattern.compile("(a\\A)"); |
| |
| private static final Map<String, String> ourEscapeRules = ContainerUtil.newLinkedHashMap(); |
| |
| static { |
| // '.' should be escaped first |
| ourEscapeRules.put("*", ".*"); |
| ourEscapeRules.put("?", "."); |
| for (char c : "+()[]/^${}|".toCharArray()) { |
| ourEscapeRules.put(String.valueOf(c), "\\" + c); |
| } |
| } |
| |
| @NotNull |
| public static String convertToRegex(@NotNull String mask) { |
| List<String> strings = StringUtil.split(mask, "\\"); |
| StringBuilder pattern = new StringBuilder(); |
| String separator = ""; |
| |
| for (String string : strings) { |
| string = StringUtil.replace(string, ".", "\\."); |
| for (Map.Entry<String, String> e : ourEscapeRules.entrySet()) { |
| string = StringUtil.replace(string, e.getKey(), e.getValue()); |
| } |
| pattern.append(separator); |
| separator = "\\\\"; |
| pattern.append(string); |
| } |
| return pattern.toString(); |
| } |
| |
| @NotNull |
| public static Pattern fromMask(@NotNull String mask) { |
| try { |
| return Pattern.compile(convertToRegex(mask)); |
| } |
| catch (PatternSyntaxException e) { |
| LOG.error(mask, e); |
| return NOTHING; |
| } |
| } |
| |
| @Contract("_, !null->!null") |
| public static Pattern compileSafe(String pattern, Pattern def) { |
| try { |
| return Pattern.compile(pattern); |
| } |
| catch (Exception e) { |
| return def; |
| } |
| } |
| /** |
| * Finds the first match in a list os Strings. |
| * |
| * @param lines list of lines, may be null. |
| * @param regex pattern to match to. |
| * @return pattern's first matched group, or entire matched string if pattern has no groups, or null. |
| */ |
| @Nullable |
| public static String getFirstMatch(List<String> lines, Pattern regex) { |
| if (lines == null) return null; |
| for (String s : lines) { |
| Matcher m = regex.matcher(s); |
| if (m.matches()) { |
| if (m.groupCount() > 0) { |
| return m.group(1); |
| } |
| } |
| } |
| return null; |
| } |
| } |