Package com.helger.commons.codec

Class AbstractRFC1522Codec

java.lang.Object

com.helger.commons.codec.AbstractRFC1522Codec

All Implemented Interfaces:

ICodec<String>, IDecoder<String,String>, IEncoder<String,String>

Direct Known Subclasses:

RFC1522BCodec, RFC1522QCodec

public abstract class AbstractRFC1522Codec
extends Object
implements ICodec<String>

Implements methods common to all codecs defined in RFC 1522.

RFC 1522 describes techniques to allow the encoding of non-ASCII text in various portions of a RFC 822 [2] message header, in a manner which is unlikely to confuse existing message handling software.

This class is immutable and thread-safe.

See Also:

• MIME (Multipurpose Internet Mail Extensions) Part Two: Message Header Extensions for Non-ASCII Text

Field Summary

Fields

Modifier and Type	Field	Description
protected static final String	POSTFIX	Postfix.
protected static final String	PREFIX	Prefix.
protected static final char	SEP	Separator.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractRFC1522Codec(Charset aCharset)	Constructor which allows for the selection of a default charset

Method Summary

Modifier and Type	Method	Description
Charset	getCharset()
protected abstract byte[]	getDecoded(byte[] aEncodedBuffer, int nOfs, int nLen)
String	getDecoded(String sEncodedText)	Applies an RFC 1522 compliant decoding scheme to the given string of text.
protected abstract byte[]	getEncoded(byte[] aDecodedBuffer, int nOfs, int nLen)
String	getEncoded(String sText)	Applies an RFC 1522 compliant encoding scheme to the given string of text with the given charset.
protected abstract String	getRFC1522Encoding()	Returns the codec name (referred to as encoding in the RFC 1522).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

SEP

protected static final char SEP

Separator.

See Also:

• Constant Field Values

PREFIX

protected static final String PREFIX

Prefix.

See Also:

• Constant Field Values

POSTFIX

protected static final String POSTFIX

Postfix.

See Also:

• Constant Field Values

Constructor Details

AbstractRFC1522Codec

protected AbstractRFC1522Codec(@Nonnull
 Charset aCharset)

Constructor which allows for the selection of a default charset

Parameters:

aCharset - the default string charset to use.

Method Details

getCharset

@Nonnull
public Charset getCharset()

getRFC1522Encoding

@Nonnull
@Nonempty
protected abstract String getRFC1522Encoding()

Returns the codec name (referred to as encoding in the RFC 1522).

Returns:

name of the codec

getEncoded

@Nullable
@ReturnsMutableCopy
protected abstract byte[] getEncoded(@Nullable
 byte[] aDecodedBuffer,
 @Nonnegative
 int nOfs,
 @Nonnegative
 int nLen)

getDecoded

@Nullable
@ReturnsMutableCopy
protected abstract byte[] getDecoded(@Nullable
 byte[] aEncodedBuffer,
 @Nonnegative
 int nOfs,
 @Nonnegative
 int nLen)

getEncoded

@Nullable
public String getEncoded(@Nullable
 String sText)

Applies an RFC 1522 compliant encoding scheme to the given string of text with the given charset.

This method constructs the "encoded-word" header common to all the RFC 1522 codecs and then invokes #getEncoded(byte []) method of a concrete class to perform the specific encoding.

Specified by:

getEncoded in interface IEncoder<String,String>

Parameters:

sText - a string to encode

Returns:

RFC 1522 compliant "encoded-word"

Throws:

EncodeException - thrown if there is an error condition during the Encoding process.

See Also:

• Standard charsets

getDecoded

@Nullable
public String getDecoded(@Nullable
 String sEncodedText)

Applies an RFC 1522 compliant decoding scheme to the given string of text.

This method processes the "encoded-word" header common to all the RFC 1522 codecs and then invokes #getDecoded(byte []) method of a concrete class to perform the specific decoding.

Specified by:

getDecoded in interface IDecoder<String,String>

Parameters:

sEncodedText - a string to decode

Returns:

A new decoded String or null if the input is null.

Throws:

DecodeException - thrown if there is an error condition during the decoding process.