/*   Copyright 2004 The Apache Software Foundation
 *
 *   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 org.apache.xmlbeans.impl.common;

import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.io.File;
import java.io.FileOutputStream;
import java.net.URL;
import java.net.MalformedURLException;

public class IOUtil
{
    public static void copyCompletely(InputStream input, OutputStream output)
        throws IOException
    {
        byte[] buf = new byte[8192];
        while (true)
        {
            int length = input.read(buf);
            if (length < 0)
                break;
            output.write(buf, 0, length);
        }
        
        try { input.close(); } catch (IOException ignore) {}
        try { output.close(); } catch (IOException ignore) {}
    }

    public static void copyCompletely(URL input, URL output)
        throws IOException
    {
        try
        {
            InputStream in = input.openStream();

            File out = new File(output.getPath());
            File dir = out.getParentFile();
            dir.mkdirs();
            
            IOUtil.copyCompletely(in, new FileOutputStream(out));
        }
        catch (IllegalArgumentException e)
        {
            throw new IOException("Cannot copy to " + output);
        }
    }

    public static URL fileToURL(File file)
    {
        try
        {
            return file.toURL();
        }
        catch (MalformedURLException e)
        {
            return null;
        }
    }
}