org.subethamail.smtp.server.SMTPCodecFactory Maven / Gradle / Ivy

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package org.subethamail.smtp.server;

import java.nio.charset.Charset;

import org.apache.mina.common.BufferDataException;
import org.apache.mina.filter.codec.ProtocolCodecFactory;
import org.apache.mina.filter.codec.ProtocolDecoder;
import org.apache.mina.filter.codec.ProtocolEncoder;
import org.apache.mina.filter.codec.textline.LineDelimiter;
import org.apache.mina.filter.codec.textline.TextLineDecoder;
import org.apache.mina.filter.codec.textline.TextLineEncoder;

/**
 * A {@link ProtocolCodecFactory} that performs encoding and decoding between
 * a text line data and a Java string object.  This codec is useful especially
 * when you work with a text-based protocols such as SMTP and IMAP.
 *
 * @author The Apache Directory Project ([email protected])
 * @version $Rev: 471457 $, $Date: 2006-11-06 01:44:10 +0900 (월, 06 11월 2006) $
 */
public class SMTPCodecFactory implements ProtocolCodecFactory
{
	private final TextLineEncoder encoder;

	private final SMTPCodecDecoder decoder;

	/**
	 * Creates a new instance with the current default {@link Charset}.
	 */
	public SMTPCodecFactory()
	{
		this(Charset.defaultCharset(), SMTPServer.DEFAULT_DATA_DEFERRED_SIZE);
	}

	/**
	 * Creates a new instance with the specified {@link Charset}.
	 */
	public SMTPCodecFactory(Charset charset, int thresholdBytes)
	{
		encoder = new TextLineEncoder(charset, new LineDelimiter("\r\n"));
		decoder = new SMTPCodecDecoder(charset, thresholdBytes);
	}

	public ProtocolEncoder getEncoder()
	{
		return encoder;
	}

	public ProtocolDecoder getDecoder()
	{
		return decoder;
	}

	/**
	 * Returns the allowed maximum size of the encoded line.
	 * If the size of the encoded line exceeds this value, the encoder
	 * will throw a {@link IllegalArgumentException}.  The default value
	 * is {@link Integer#MAX_VALUE}.
	 * 
	 * This method does the same job with {@link TextLineEncoder#getMaxLineLength()}.
	 */
	public int getEncoderMaxLineLength()
	{
		return encoder.getMaxLineLength();
	}

	/**
	 * Sets the allowed maximum size of the encoded line.
	 * If the size of the encoded line exceeds this value, the encoder
	 * will throw a {@link IllegalArgumentException}.  The default value
	 * is {@link Integer#MAX_VALUE}.
	 * 

	 * This method does the same job with {@link TextLineEncoder#setMaxLineLength(int)}.
	 */
	public void setEncoderMaxLineLength(int maxLineLength)
	{
		encoder.setMaxLineLength(maxLineLength);
	}

	/**
	 * Returns the allowed maximum size of the line to be decoded.
	 * If the size of the line to be decoded exceeds this value, the
	 * decoder will throw a {@link BufferDataException}.  The default
	 * value is 1024 (1KB).
	 * 

	 * This method does the same job with {@link TextLineDecoder#getMaxLineLength()}.
	 */
	public int getDecoderMaxLineLength()
	{
		return decoder.getMaxLineLength();
	}

	/**
	 * Sets the allowed maximum size of the line to be decoded.
	 * If the size of the line to be decoded exceeds this value, the
	 * decoder will throw a {@link BufferDataException}.  The default
	 * value is 1024 (1KB).
	 * 
	 * This method does the same job with {@link TextLineDecoder#setMaxLineLength(int)}.
	 */
	public void setDecoderMaxLineLength(int maxLineLength)
	{
		decoder.setMaxLineLength(maxLineLength);
	}
}