org.apache.http.message
Class TokenParser

java.lang.Object
  org.apache.http.message.TokenParser

@Contract(threading=IMMUTABLE)
public class TokenParser
extends Object

Low level parser for header field elements. The parsing routines of this class are designed to produce near zero intermediate garbage and make no intermediate copies of input data.

This class is immutable and thread safe.

Since:

4.4

Field Summary

static char	CR US-ASCII CR, carriage return (13)
static char	DQUOTE Double quote
static char	ESCAPE Backward slash / escape character
static char	HT US-ASCII HT, horizontal-tab (9)
static TokenParser	INSTANCE
static char	LF US-ASCII LF, line feed (10)
static char	SP US-ASCII SP, space (32)

Constructor Summary

TokenParser()

Method Summary

void	copyContent(CharArrayBuffer buf, ParserCursor cursor, BitSet delimiters, StringBuilder dst) Transfers content into the destination buffer until a whitespace character or any of the given delimiters is encountered.
void	copyQuotedContent(CharArrayBuffer buf, ParserCursor cursor, StringBuilder dst) Transfers content enclosed with quote marks into the destination buffer.
void	copyUnquotedContent(CharArrayBuffer buf, ParserCursor cursor, BitSet delimiters, StringBuilder dst) Transfers content into the destination buffer until a whitespace character, a quote, or any of the given delimiters is encountered.
static BitSet	INIT_BITSET(int... b)
static boolean	isWhitespace(char ch)
String	parseToken(CharArrayBuffer buf, ParserCursor cursor, BitSet delimiters) Extracts from the sequence of chars a token terminated with any of the given delimiters discarding semantically insignificant whitespace characters.
String	parseValue(CharArrayBuffer buf, ParserCursor cursor, BitSet delimiters) Extracts from the sequence of chars a value which can be enclosed in quote marks and terminated with any of the given delimiters discarding semantically insignificant whitespace characters.
void	skipWhiteSpace(CharArrayBuffer buf, ParserCursor cursor) Skips semantically insignificant whitespace characters and moves the cursor to the closest non-whitespace character.

Methods inherited from class java.lang.Object

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

Field Detail

CR

public static final char CR

US-ASCII CR, carriage return (13)

See Also:

Constant Field Values

LF

public static final char LF

US-ASCII LF, line feed (10)

See Also:

Constant Field Values

SP

public static final char SP

US-ASCII SP, space (32)

See Also:

Constant Field Values

HT

public static final char HT

US-ASCII HT, horizontal-tab (9)

See Also:

Constant Field Values

DQUOTE

public static final char DQUOTE

Double quote

See Also:

Constant Field Values

ESCAPE

public static final char ESCAPE

Backward slash / escape character

See Also:

Constant Field Values

INSTANCE

public static final TokenParser INSTANCE

Constructor Detail

TokenParser

public TokenParser()

Method Detail

INIT_BITSET

public static BitSet INIT_BITSET(int... b)

isWhitespace

public static boolean isWhitespace(char ch)

parseToken

public String parseToken(CharArrayBuffer buf,
                         ParserCursor cursor,
                         BitSet delimiters)

Extracts from the sequence of chars a token terminated with any of the given delimiters discarding semantically insignificant whitespace characters.

Parameters:

buf - buffer with the sequence of chars to be parsed

cursor - defines the bounds and current position of the buffer

delimiters - set of delimiting characters. Can be null if the token is not delimited by any character.

parseValue

public String parseValue(CharArrayBuffer buf,
                         ParserCursor cursor,
                         BitSet delimiters)

Extracts from the sequence of chars a value which can be enclosed in quote marks and terminated with any of the given delimiters discarding semantically insignificant whitespace characters.

Parameters:

buf - buffer with the sequence of chars to be parsed

cursor - defines the bounds and current position of the buffer

delimiters - set of delimiting characters. Can be null if the value is not delimited by any character.

skipWhiteSpace

public void skipWhiteSpace(CharArrayBuffer buf,
                           ParserCursor cursor)

Skips semantically insignificant whitespace characters and moves the cursor to the closest non-whitespace character.

Parameters:

buf - buffer with the sequence of chars to be parsed

cursor - defines the bounds and current position of the buffer

copyContent

public void copyContent(CharArrayBuffer buf,
                        ParserCursor cursor,
                        BitSet delimiters,
                        StringBuilder dst)

Transfers content into the destination buffer until a whitespace character or any of the given delimiters is encountered.

Parameters:

buf - buffer with the sequence of chars to be parsed

cursor - defines the bounds and current position of the buffer

delimiters - set of delimiting characters. Can be null if the value is delimited by a whitespace only.

dst - destination buffer

copyUnquotedContent

public void copyUnquotedContent(CharArrayBuffer buf,
                                ParserCursor cursor,
                                BitSet delimiters,
                                StringBuilder dst)

Transfers content into the destination buffer until a whitespace character, a quote, or any of the given delimiters is encountered.

Parameters:

buf - buffer with the sequence of chars to be parsed

cursor - defines the bounds and current position of the buffer

delimiters - set of delimiting characters. Can be null if the value is delimited by a whitespace or a quote only.

dst - destination buffer

copyQuotedContent

public void copyQuotedContent(CharArrayBuffer buf,
                              ParserCursor cursor,
                              StringBuilder dst)

Transfers content enclosed with quote marks into the destination buffer.

Parameters:

buf - buffer with the sequence of chars to be parsed

cursor - defines the bounds and current position of the buffer

dst - destination buffer