/**
    *
    * Copyright 2004 The Apache Software Foundation
    *
    * 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 org.codehaus.plexus.archiver.bzip2;
  
  import javax.annotation.Nonnull;
  import javax.inject.Named;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
  import org.codehaus.plexus.archiver.AbstractUnArchiver;
  import org.codehaus.plexus.archiver.ArchiverException;
  
  import static org.codehaus.plexus.archiver.util.Streams.bufferedInputStream;
  import static org.codehaus.plexus.archiver.util.Streams.bufferedOutputStream;
  import static org.codehaus.plexus.archiver.util.Streams.copyFully;
  import static org.codehaus.plexus.archiver.util.Streams.fileInputStream;
  import static org.codehaus.plexus.archiver.util.Streams.fileOutputStream;
  
  /**
   * @author <a href="mailto:evenisse@codehaus.org">Emmanuel Venisse</a>
   */
  @Named("bzip2")
  public class BZip2UnArchiver extends AbstractUnArchiver {
  
      private static final String OPERATION_BZIP2 = "bzip2";
  
      public BZip2UnArchiver() {}
  
      public BZip2UnArchiver(File sourceFile) {
          super(sourceFile);
      }
  
      @Override
      protected void execute() throws ArchiverException {
          if (getSourceFile().lastModified() > getDestFile().lastModified()) {
              getLogger()
                      .info("Expanding " + getSourceFile().getAbsolutePath() + " to "
                              + getDestFile().getAbsolutePath());
  
              copyFully(
                      getBZip2InputStream(bufferedInputStream(fileInputStream(getSourceFile(), OPERATION_BZIP2))),
                      bufferedOutputStream(fileOutputStream(getDestFile(), OPERATION_BZIP2)),
                      OPERATION_BZIP2);
          }
      }
  
      public static @Nonnull BZip2CompressorInputStream getBZip2InputStream(InputStream bis) throws ArchiverException {
          try {
              // Note that bis must be buffered for performance. Does not need buffering around BZip2CompressorInputStream
              return new BZip2CompressorInputStream(bis);
          } catch (IOException e) {
              throw new ArchiverException("Trouble creating BZIP2 compressor, invalid file ?", e);
          }
      }
  
      @Override
      protected void execute(String path, File outputDirectory) {
          throw new UnsupportedOperationException("Targeted extraction not supported in BZIP2 format.");
      }
  }