/*
 * Copyright (c) 2012, grossmann, WHeckmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

package org.jowidgets.util.io;

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

import org.jowidgets.util.Assert;

public final class IoUtils {

    private IoUtils() {}

    public static void tryCloseSilent(final Closeable closeable) {
        try {
            if (closeable != null) {
                closeable.close();
            }
        }
        catch (final IOException e) {
            //do silent
        }
    }

    public static byte[] toByteArray(final InputStream inputStream) {
        Assert.paramNotNull(inputStream, "inputStream");
        final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        inputStreamToOutputStream(inputStream, outputStream);
        try {
            outputStream.flush();
        }
        catch (final IOException e) {
            throw new RuntimeException(e);
        }
        final byte[] result = outputStream.toByteArray();
        tryCloseSilent(outputStream);
        return result;
    }

    public static void inputStreamToOutputStream(final InputStream inputStream, final OutputStream outputStream) {
        try {
            final byte[] buf = new byte[1024];
            int length;
            while ((length = inputStream.read(buf)) > 0) {
                outputStream.write(buf, 0, length);
            }
        }
        catch (final Exception e) {
            throw new RuntimeException(e);
        }
    }

}