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.java.bytecode;
021    
022    import java.io.File;
023    import java.util.Arrays;
024    import java.util.Collection;
025    import java.util.List;
026    
027    import org.slf4j.Logger;
028    import org.slf4j.LoggerFactory;
029    import org.sonar.java.bytecode.loader.SquidClassLoader;
030    
031    import com.google.common.collect.Lists;
032    
033    public final class ClassLoaderBuilder {
034    
035      private static final Logger LOG = LoggerFactory.getLogger(ClassLoaderBuilder.class);
036    
037      private ClassLoaderBuilder() {
038        // only static methods
039      }
040    
041      public static ClassLoader create(Collection<File> bytecodeFilesOrDirectories) {
042        List<File> files = Lists.newArrayList();
043        for (File file : bytecodeFilesOrDirectories) {
044          if (file.isFile() && file.getPath().endsWith(".class")) {
045            LOG.info("Sonar Squid ClassLoader was expecting a JAR file instead of CLASS file : '" + file.getAbsolutePath() + "'");
046          } else {
047            files.add(file);
048          }
049        }
050    
051        if (LOG.isDebugEnabled()) {
052          LOG.debug("----- Classpath analyzed by Squid:");
053          for (File file : files) {
054            LOG.debug(file.getAbsolutePath());
055          }
056          LOG.debug("-----");
057        }
058    
059        try {
060          return new SquidClassLoader(files);
061        } catch (Exception e) {
062          throw new IllegalStateException("Can not create ClassLoader", e);
063        }
064      }
065    
066      /**
067       * For tests.
068       */
069      public static ClassLoader create(File bytecodeFileOrDirectory) {
070        return create(Arrays.asList(bytecodeFileOrDirectory));
071      }
072    
073    }