chameleon.io.IOUtils Maven / Gradle / Ivy
/*
* Copyright (c) 2008, Christophe Delory
* 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.
*
* THIS SOFTWARE IS PROVIDED BY CHRISTOPHE DELORY ``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 CHRISTOPHE DELORY 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 chameleon.io;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.StringWriter;
/**
* General IO manipulation.
* @version $Revision: 55 $
* @author Christophe Delory
*/
public final class IOUtils
{
/**
* Copies the contents of the specified input stream to a string, using the specified character encoding.
* @param in an input stream. Shall not be null.
* @param encoding the encoding to use. May be null (in this case, the default platform one will be used).
* @return a string. Shall not be null.
* @throws NullPointerException if in is null.
* @throws IOException if an I/O error occurs.
* @throws java.io.UnsupportedEncodingException if the named charset is not supported.
*/
public static String toString(final InputStream in, final String encoding) throws IOException
{
final InputStreamReader reader;
if (encoding == null)
{
reader = new InputStreamReader(in); // Throws NullPointerException if in is null.
}
else
{
reader = new InputStreamReader(in, encoding); // May throw UnsupportedEncodingException. Throws NullPointerException if in is null.
}
final StringWriter writer = new StringWriter();
final char[] buffer = new char[512];
int nb = 0;
while (-1 != (nb = reader.read(buffer))) // May throw IOException.
{
writer.write(buffer, 0, nb);
}
return writer.toString();
}
/**
* The default no-arg constructor shall not be accessible.
*/
private IOUtils()
{
}
}