Android Open Source - bitfynd-wallet-android Io

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License

The source code is released under:

GNU General Public License

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Java Source Code

/*
 * Copyright 2011-2014 the original author or authors.
 *//from  w  w w .  j  a  v a2  s .  com
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.schildbach.wallet.util;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.lang.reflect.Method;

import javax.annotation.Nonnull;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Andreas Schildbach
 */
public class Io
{
  private static final Logger log = LoggerFactory.getLogger(Io.class);

  public static final long copy(@Nonnull final Reader reader, @Nonnull final StringBuilder builder) throws IOException
  {
    return copy(reader, builder, 0);
  }

  public static final long copy(@Nonnull final Reader reader, @Nonnull final StringBuilder builder, final long maxChars) throws IOException
  {
    final char[] buffer = new char[256];
    long count = 0;
    int n = 0;
    while (-1 != (n = reader.read(buffer)))
    {
      builder.append(buffer, 0, n);
      count += n;

      if (maxChars != 0 && count > maxChars)
        throw new IOException("Read more than the limit of " + maxChars + " characters");
    }
    return count;
  }

  public static final long copy(@Nonnull final InputStream is, @Nonnull final OutputStream os) throws IOException
  {
    final byte[] buffer = new byte[1024];
    long count = 0;
    int n = 0;
    while (-1 != (n = is.read(buffer)))
    {
      os.write(buffer, 0, n);
      count += n;
    }
    return count;
  }

  @SuppressWarnings({ "rawtypes", "unchecked" })
  public static void chmod(@Nonnull final File path, final int mode)
  {
    try
    {
      final Class fileUtils = Class.forName("android.os.FileUtils");
      final Method setPermissions = fileUtils.getMethod("setPermissions", String.class, int.class, int.class, int.class);
      setPermissions.invoke(null, path.getAbsolutePath(), mode, -1, -1);
    }
    catch (final Exception x)
    {
      log.info("problem using undocumented chmod api", x);
    }
  }
}

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