com.sun.mail.util.LineOutputStream Maven / Gradle / Ivy
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package com.sun.mail.util;
import java.io.*;
import java.nio.charset.StandardCharsets;
/**
* This class is to support writing out Strings as a sequence of bytes
* terminated by a CRLF sequence. The String must contain only US-ASCII
* characters.
*
* The expected use is to write out RFC822 style headers to an output
* stream.
*
* @author John Mani
* @author Bill Shannon
*/
public class LineOutputStream extends FilterOutputStream {
private boolean allowutf8;
private static byte[] newline;
static {
newline = new byte[2];
newline[0] = (byte)'\r';
newline[1] = (byte)'\n';
}
public LineOutputStream(OutputStream out) {
this(out, false);
}
/**
* @param out the OutputStream
* @param allowutf8 allow UTF-8 characters?
* @since JavaMail 1.6
*/
public LineOutputStream(OutputStream out, boolean allowutf8) {
super(out);
this.allowutf8 = allowutf8;
}
public void writeln(String s) throws IOException {
byte[] bytes;
if (allowutf8)
bytes = s.getBytes(StandardCharsets.UTF_8);
else
bytes = ASCIIUtility.getBytes(s);
out.write(bytes);
out.write(newline);
}
public void writeln() throws IOException {
out.write(newline);
}
}