/*

 * Copyright (c) 2004, 2011, Oracle and/or its affiliates. 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 Oracle 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 THE COPYRIGHT OWNER OR

 * CONTRIBUTORS 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.

 */

/*

 * This source code is provided to illustrate the usage of a given feature

 * or technique and has been deliberately simplified. Additional steps

 * required for a production-quality application, such as security checks,

 * input validation and proper error handling, might not be present in

 * this sample code.

 */

import java.io.*;

import java.nio.*;

import java.nio.charset.*;

/**

 * A Content type that provides for transferring Strings.

 *

 * @author Mark Reinhold

 * @author Brad R. Wetmore

 */

class StringContent implements Content {

    private static Charset ascii = Charset.forName("US-ASCII");

    private String type;                // MIME type

    private String content;

    StringContent(CharSequence c, String t) {

        content = c.toString();

        if (!content.endsWith("\n"))

            content += "\n";

        type = t + "; charset=iso-8859-1";

    }

    StringContent(CharSequence c) {

        this(c, "text/plain");

    }

    StringContent(Exception x) {

        StringWriter sw = new StringWriter();

        x.printStackTrace(new PrintWriter(sw));

        type = "text/plain; charset=iso-8859-1";

        content = sw.toString();

    }

    public String type() {

        return type;

    }

    private ByteBuffer bb = null;

    private void encode() {

        if (bb == null)

            bb = ascii.encode(CharBuffer.wrap(content));

    }

    public long length() {

        encode();

        return bb.remaining();

    }

    public void prepare() {

        encode();

        bb.rewind();

    }

    public boolean send(ChannelIO cio) throws IOException {

        if (bb == null)

            throw new IllegalStateException();

        cio.write(bb);

        return bb.hasRemaining();

    }

    public void release() throws IOException {

    }

}