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 */
020package org.sonar.java.bytecode;
021
022import java.io.File;
023import java.util.Arrays;
024import java.util.Collection;
025import java.util.List;
026
027import org.slf4j.Logger;
028import org.slf4j.LoggerFactory;
029import org.sonar.java.bytecode.loader.SquidClassLoader;
030
031import com.google.common.collect.Lists;
032
033public 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}