it.tidalwave.mobile.android.io.AndroidExternalFileSystem Maven / Gradle / Ivy

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/***********************************************************************************************************************
 *
 * blueBill Mobile - open source birdwatching
 * ==========================================
 *
 * Copyright (C) 2009, 2010 by Tidalwave s.a.s. (http://www.tidalwave.it)
 * http://bluebill.tidalwave.it/mobile/
 *
 ***********************************************************************************************************************
 *
 * 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.
 *
 ***********************************************************************************************************************
 *
 * $Id: AndroidExternalFileSystem.java,v 79a497f64ec9 2010/08/18 23:41:56 fabrizio $
 *
 **********************************************************************************************************************/
package it.tidalwave.mobile.android.io;

import javax.annotation.CheckForNull;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.openide.util.lookup.ServiceProvider;
import org.openide.util.Lookup;
import it.tidalwave.mobile.io.FileSystem;
import android.content.Context;
import android.os.Environment;
import android.os.StatFs;
import static android.os.Environment.*;

/***********************************************************************************************************************
 *
 * @author  Fabrizio Giudici
 * @version $Id: $
 *
 **********************************************************************************************************************/
public class AndroidExternalFileSystem implements FileSystem
  {
    @CheckForNull
    private StatFs statFs;

    @Nonnull
    private final Context context = Lookup.getDefault().lookup(Context.class);

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    @Nonnull
    public OutputStream openFileOutput (final @Nonnull String path)
      throws IOException
      {
        return new FileOutputStream(getFile(path));
//        return context.openFileOutput(name, Context.MODE_WORLD_READABLE);
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    @Nonnull
    public InputStream openFileInput (final @Nonnull String path)
      throws IOException
      {
        return new FileInputStream(getFile(path));
//        return context.openFileInput(name);
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    @Nonnull
    public File getFile (final @Nonnull String path)
      throws IOException
      {
        if (!isWritable())
          {
            throw new IOException("External storage is not ready: " + getExternalStorageState());
          }
        
        final File file = new File(getExternalStorageDirectory(), context.getPackageName() +"/" + path);
        file.getParentFile().mkdirs();
        return file;
//        final File f = new File(name);
//        final File dir = context.getDir(f.getParent(), Context.MODE_WORLD_READABLE);
//        return new File(dir, f.getName());
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    @Nonnegative
    public synchronized long getFreeSpace()
      {
        if (statFs == null)
          {
            statFs = new StatFs(getExternalStorageDirectory().getAbsolutePath());
          }

        return (long)statFs.getAvailableBlocks() * (long)statFs.getBlockSize();
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    public boolean isWritable()
      {
        final String state = getExternalStorageState();
        return MEDIA_MOUNTED.equals(state);
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    @Nonnull
    protected String getExternalStorageState()
      {
        return Environment.getExternalStorageState();
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    @Nonnull
    protected File getExternalStorageDirectory()
      {
        return Environment.getExternalStorageDirectory();
      }
  }