it.tidalwave.mobile.io.IoUtils Maven / Gradle / Ivy

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/***********************************************************************************************************************
 *
 * blueBill Core - open source birding
 * Copyright (C) 2009-2011 by Tidalwave s.a.s. (http://www.tidalwave.it)
 *
 ***********************************************************************************************************************
 *
 * 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.
 *
 ***********************************************************************************************************************
 *
 * WWW: http://bluebill.tidalwave.it
 * SCM: https://java.net/hg/bluebill~core-src
 *
 **********************************************************************************************************************/
package it.tidalwave.mobile.io;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Closeable;
import java.util.zip.ZipFile;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/***********************************************************************************************************************
 *
 * @author  Fabrizio Giudici
 * @version $Id$
 *
 **********************************************************************************************************************/
public class IoUtils
  {
    private static final Logger log = LoggerFactory.getLogger(IoUtils.class); 

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    public static void safeClose (final @Nullable Closeable is)
      {
        if (is != null)
          {
            try
              {
                is.close();
              }
            catch (IOException e)
              {

              }
          }
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    public static void safeClose (final @Nullable ZipFile zipFile)
      {
        if (zipFile != null)
          {
            try
              {
                zipFile.close();
              }
            catch (IOException e)
              {

              }
          }
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    public static void copy (final @Nonnull InputStream is, final @Nonnull OutputStream os)
      throws IOException
      {
        final byte[] buffer = new byte[64 * 1024];
        
        for (;;)
          {
            final int n = is.read(buffer);

            if (n <= 0)
              {
                break;
              }

            os.write(buffer, 0, n);
          }
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    public static void copy (final @Nonnull File srcFile, final @Nonnull File destFile)
      throws IOException
      {
        log.debug("copy({} -> {})", srcFile.getAbsolutePath(), destFile.getAbsolutePath());
        InputStream is = null;
        OutputStream os = null;
        final File parentFile = destFile.getParentFile();

        if (!parentFile.exists() && !parentFile.mkdirs())
          {
            throw new IOException("Cannot create path " + parentFile.getAbsolutePath());
          }

        try
          {
            is = new FileInputStream(srcFile);
            os = new FileOutputStream(destFile);
            copy(is, os);
          }
        finally
          {
            safeClose(is);
            safeClose(os);
          }
      }
  }