org.apache.hc.core5.util

## Class Tokenizer

- java.lang.Object
- - org.apache.hc.core5.util.Tokenizer

- Direct Known Subclasses:
    TokenParser

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

  Tokenizer that can be used as a foundation for more complex parsing routines. Methods 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:
    5.1

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `Tokenizer.Cursor`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static int` | `CR`
    `static char` | `DQUOTE` Double quote
    `static char` | `ESCAPE` Backward slash / escape character
    `static int` | `HT`
    `static Tokenizer` | `INSTANCE`
    `static int` | `LF`
    `static int` | `SP`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `Tokenizer()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `copyContent(CharSequence buf, Tokenizer.Cursor 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(CharSequence buf, Tokenizer.Cursor cursor, StringBuilder dst)` Transfers content enclosed with quote marks into the destination buffer.
    `void` | `copyUnquotedContent(CharSequence buf, Tokenizer.Cursor 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` | `parseContent(CharSequence buf, Tokenizer.Cursor cursor, BitSet delimiters)` Extracts from the sequence of chars a token terminated with any of the given delimiters or a whitespace characters.
    `String` | `parseToken(CharSequence buf, Tokenizer.Cursor 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(CharSequence buf, Tokenizer.Cursor 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(CharSequence buf, Tokenizer.Cursor 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

    - #### 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

    - #### CR

          public static final int CR

      See Also:
        Constant Field Values

    - #### LF

          public static final int LF

      See Also:
        Constant Field Values

    - #### SP

          public static final int SP

      See Also:
        Constant Field Values

    - #### HT

          public static final int HT

      See Also:
        Constant Field Values

    - #### INSTANCE

          public static final Tokenizer INSTANCE

  - ### Constructor Detail

    - #### Tokenizer

          public Tokenizer()

  - ### Method Detail

    - #### INIT_BITSET

          public static BitSet INIT_BITSET(int... b)

    - #### isWhitespace

          public static boolean isWhitespace(char ch)

    - #### parseContent

          public String parseContent(CharSequence buf,
                            Tokenizer.Cursor cursor,
                            BitSet delimiters)

      Extracts from the sequence of chars a token terminated with any of the given delimiters or a 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.

    - #### parseToken

          public String parseToken(CharSequence buf,
                          Tokenizer.Cursor 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(CharSequence buf,
                          Tokenizer.Cursor 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(CharSequence buf,
                            Tokenizer.Cursor 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(CharSequence buf,
                         Tokenizer.Cursor 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(CharSequence buf,
                                 Tokenizer.Cursor 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(CharSequence buf,
                               Tokenizer.Cursor 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

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