IOStreamUtils.java example

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hank-master
/**
 *  Copyright 2012 LiveRamp
 *
 *  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 com.liveramp.hank.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class IOStreamUtils {

  public static final int DEFAULT_BUFFER_SIZE = 256 * 1024;

  public static long copy(final InputStream input,
                          final OutputStream output) throws IOException {
    byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
    return copy(input, output, buffer);
  }

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