IOUtils.java

package com.rapidftr.utils;


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

//Copied the implementation from common apache IOUtils instead of depending on the entire library and use only this function.
public class IOUtils {

    private static final int EOF = -1;
    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;

    public static byte[] toByteArray(InputStream input) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        copy(input, output);
        return output.toByteArray();
    }

    public static int copy(InputStream input, OutputStream output) throws IOException {
        long count = copyLarge(input, output);
        if (count > Integer.MAX_VALUE) {
            return -1;
        }
        return (int) count;
    }

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

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

}