org.craft.atom.protocol.textline.TextLineEncoder Maven / Gradle / Ivy
package org.craft.atom.protocol.textline;
import java.nio.charset.Charset;
import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import org.craft.atom.protocol.AbstractProtocolEncoder;
import org.craft.atom.protocol.ProtocolEncoder;
import org.craft.atom.protocol.ProtocolException;
/**
* A {@link ProtocolEncoder} which encodes a text line string into bytes which ends with the delimiter, default charset is utf-8.
*
* Thread safe.
*
* @author Hu Feng
* @version 1.0, Oct 16, 2012
*/
@ToString(callSuper = true, of = { "delimiter" })
public class TextLineEncoder extends AbstractProtocolEncoder implements ProtocolEncoder {
@Getter @Setter private String delimiter = "\n";
private int maxLineLength = Integer.MAX_VALUE;
// ~ ------------------------------------------------------------------------------------------------------------
public TextLineEncoder() {
super();
}
public TextLineEncoder(Charset charset) {
this.charset = charset;
}
public TextLineEncoder(Charset charset, String delimiter) {
this(charset);
this.delimiter = delimiter;
}
public TextLineEncoder(Charset charset, String delimiter, int maxLineLength) {
this(charset, delimiter);
this.maxLineLength = maxLineLength;
}
// ~ ------------------------------------------------------------------------------------------------------------
@Override
public byte[] encode(String str) throws ProtocolException {
str += delimiter;
byte[] lineBytes = str.getBytes(charset);
if (lineBytes.length > maxLineLength) {
throw new ProtocolException("Line is too long, maxLineLength=" + maxLineLength );
}
return lineBytes;
}
}