package org.codehaus.plexus.util;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.codehaus.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache MavenSession" must not be used to endorse or promote products
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 * 5. Products derived from this software may not be called "Apache",
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 *
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.codehaus.org/>.
 *
 * ====================================================================
 */

import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;

/**
 * Wraps a String as an InputStream. Note that data will be lost for characters not in ISO Latin 1, as a simple
 * char->byte mapping is assumed.
 *
 * @author <a href="mailto:umagesh@codehaus.org">Magesh Umasankar</a>
 * @deprecated As of version 1.5.2 this class should no longer be used because it does not properly handle character
 *             encoding. Instead, wrap the output from {@link String#getBytes(String)} into a
 *             {@link java.io.ByteArrayInputStream}.
 */
public class StringInputStream
    extends InputStream
{
    /** Source string, stored as a StringReader */
    private StringReader in;

    /**
     * Composes a stream from a String
     *
     * @param source The string to read from. Must not be <code>null</code>.
     */
    public StringInputStream( String source )
    {
        in = new StringReader( source );
    }

    /**
     * Reads from the Stringreader, returning the same value. Note that data will be lost for characters not in ISO
     * Latin 1. Clients assuming a return value in the range -1 to 255 may even fail on such input.
     *
     * @return the value of the next character in the StringReader
     * @exception IOException if the original StringReader fails to be read
     */
    public int read()
        throws IOException
    {
        return in.read();
    }

    /**
     * Closes the Stringreader.
     *
     * @exception IOException if the original StringReader fails to be closed
     */
    public void close()
        throws IOException
    {
        in.close();
    }

    /**
     * Marks the read limit of the StringReader.
     *
     * @param limit the maximum limit of bytes that can be read before the mark position becomes invalid
     */
    public synchronized void mark( final int limit )
    {
        try
        {
            in.mark( limit );
        }
        catch ( IOException ioe )
        {
            throw new RuntimeException( ioe.getMessage() );
        }
    }

    /**
     * Resets the StringReader.
     *
     * @exception IOException if the StringReader fails to be reset
     */
    public synchronized void reset()
        throws IOException
    {
        in.reset();
    }

    /**
     * @see InputStream#markSupported
     */
    public boolean markSupported()
    {
        return in.markSupported();
    }
}
