StringContent.java example

Explorer
openjdk8-jdk-master
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 *
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 *     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,
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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/*
 * 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 {
    }
}