001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2012 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.plugins.findbugs;
021    
022    import org.apache.commons.lang.StringUtils;
023    import org.sonar.api.resources.Java;
024    
025    public final class FindbugsAntConverter {
026    
027      private FindbugsAntConverter() {
028      }
029    
030      /**
031       * Convert the exclusion ant pattern to a java regexp accepted by findbugs
032       * exclusion file
033       *
034       * @param exclusion ant pattern to convert
035       * @return Exclusion pattern for findbugs
036       */
037      public static String antToJavaRegexpConvertor(String exclusion) {
038        StringBuilder builder = new StringBuilder("~");
039        int offset = 0;
040        // First **/ or */ is optional
041        if (exclusion.startsWith("**/")) {
042          builder.append("(.*\\.)?");
043          offset += 3;
044        } else if (exclusion.startsWith("*/")) {
045          builder.append("([^\\\\^\\s]*\\.)?");
046          offset += 2;
047        }
048        for (String suffix : Java.SUFFIXES) {
049          exclusion = StringUtils.removeEndIgnoreCase(exclusion, "." + suffix);
050        }
051    
052        char[] array = exclusion.toCharArray();
053        for (int i = offset; i < array.length; i++) {
054          char c = array[i];
055          if (c == '?') {
056            builder.append('.');
057          } else if (c == '*') {
058            if (i + 1 < array.length && array[i + 1] == '*') {
059              builder.append(".*");
060              i++;
061            } else {
062              builder.append("[^\\\\^\\s]*");
063            }
064          } else if (c == '/') {
065            builder.append("\\.");
066          } else {
067            builder.append(c);
068          }
069        }
070        return builder.toString();
071      }
072    }