# Class StrMatcher

java.lang.Object
org.apache.commons.text.StrMatcher

@Deprecated public abstract class StrMatcher extends Object
Deprecated.
Deprecated as of 1.3, use `StringMatcherFactory` instead. This class will be removed in 2.0.
A matcher class that can be queried to determine if a character array portion matches.

This class comes complete with various factory methods. If these do not suffice, you can subclass and implement your own matcher.

Since:
  1.0

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  `protected`
  `StrMatcher()`
  Deprecated.
  Constructs a new instance.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `static StrMatcher`
  `charMatcher(char ch)`
  Deprecated.
  Creates a matcher from a character.
  `static StrMatcher`
  `charSetMatcher(char... chars)`
  Deprecated.
  Creates a matcher from a set of characters.
  `static StrMatcher`
  `charSetMatcher(String chars)`
  Deprecated.
  Creates a matcher from a string representing a set of characters.
  `static StrMatcher`
  `commaMatcher()`
  Deprecated.
  Returns a matcher which matches the comma character.
  `static StrMatcher`
  `doubleQuoteMatcher()`
  Deprecated.
  Returns a matcher which matches the double quote character.
  `int`
  `isMatch(char[] buffer, int pos)`
  Deprecated.
  Returns the number of matching characters, or zero if there is no match.
  `abstract int`
  `isMatch(char[] buffer, int pos, int bufferStart, int bufferEnd)`
  Deprecated.
  Returns the number of matching characters, or zero if there is no match.
  `static StrMatcher`
  `noneMatcher()`
  Deprecated.
  Matches no characters.
  `static StrMatcher`
  `quoteMatcher()`
  Deprecated.
  Returns a matcher which matches the single or double quote character.
  `static StrMatcher`
  `singleQuoteMatcher()`
  Deprecated.
  Returns a matcher which matches the single quote character.
  `static StrMatcher`
  `spaceMatcher()`
  Deprecated.
  Returns a matcher which matches the space character.
  `static StrMatcher`
  `splitMatcher()`
  Deprecated.
  Matches the same characters as StringTokenizer, namely space, tab, newline and form feed.
  `static StrMatcher`
  `stringMatcher(String str)`
  Deprecated.
  Creates a matcher from a string.
  `static StrMatcher`
  `tabMatcher()`
  Deprecated.
  Returns a matcher which matches the tab character.
  `static StrMatcher`
  `trimMatcher()`
  Deprecated.
  Matches the String trim() whitespace characters.

  ### Methods inherited from class Object

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

- ## Constructor Details

  - ### StrMatcher

    protected StrMatcher()
    Deprecated.
    Constructs a new instance.

- ## Method Details

  - ### charMatcher

    public static StrMatcher charMatcher(char ch)
    Deprecated.
    Creates a matcher from a character.
    Parameters:
      `ch` - the character to match, must not be null.
    Returns:
      a new Matcher for the given char.

  - ### charSetMatcher

    public static StrMatcher charSetMatcher(char... chars)
    Deprecated.
    Creates a matcher from a set of characters.
    Parameters:
      `chars` - the characters to match, null or empty matches nothing.
    Returns:
      a new matcher for the given char[].

  - ### charSetMatcher

    public static StrMatcher charSetMatcher(String chars)
    Deprecated.
    Creates a matcher from a string representing a set of characters.
    Parameters:
      `chars` - the characters to match, null or empty matches nothing.
    Returns:
      a new Matcher for the given characters.

  - ### commaMatcher

    public static StrMatcher commaMatcher()
    Deprecated.
    Returns a matcher which matches the comma character.
    Returns:
      a matcher for a comma.

  - ### doubleQuoteMatcher

    public static StrMatcher doubleQuoteMatcher()
    Deprecated.
    Returns a matcher which matches the double quote character.
    Returns:
      a matcher for a double quote.

  - ### noneMatcher

    public static StrMatcher noneMatcher()
    Deprecated.
    Matches no characters.
    Returns:
      a matcher that matches nothing.

  - ### quoteMatcher

    public static StrMatcher quoteMatcher()
    Deprecated.
    Returns a matcher which matches the single or double quote character.
    Returns:
      a matcher for a single or double quote.

  - ### singleQuoteMatcher

    public static StrMatcher singleQuoteMatcher()
    Deprecated.
    Returns a matcher which matches the single quote character.
    Returns:
      a matcher for a single quote.

  - ### spaceMatcher

    public static StrMatcher spaceMatcher()
    Deprecated.
    Returns a matcher which matches the space character.
    Returns:
      a matcher for a space.

  - ### splitMatcher

    public static StrMatcher splitMatcher()
    Deprecated.
    Matches the same characters as StringTokenizer, namely space, tab, newline and form feed.
    Returns:
      The split matcher.

  - ### stringMatcher

    public static StrMatcher stringMatcher(String str)
    Deprecated.
    Creates a matcher from a string.
    Parameters:
      `str` - the string to match, null or empty matches nothing
    Returns:
      a new Matcher for the given String

  - ### tabMatcher

    public static StrMatcher tabMatcher()
    Deprecated.
    Returns a matcher which matches the tab character.
    Returns:
      a matcher for a tab.

  - ### trimMatcher

    public static StrMatcher trimMatcher()
    Deprecated.
    Matches the String trim() whitespace characters.
    Returns:
      The trim matcher.

  - ### isMatch

    public int isMatch(char[] buffer, int pos)
    Deprecated.
    Returns the number of matching characters, or zero if there is no match.

    This method is called to check for a match. The parameter `pos` represents the current position to be checked in the string `buffer` (a character array which must not be changed). The API guarantees that `pos` is a valid index for `buffer`.

    The matching code may check one character or many. It may check characters preceding `pos` as well as those after.

    It must return zero for no match, or a positive number if a match was found. The number indicates the number of characters that matched.

    Parameters:
      `buffer` - the text content to match against, do not change.
      `pos` - the starting position for the match, valid for buffer.
    Returns:
      The number of matching characters, or zero if there is no match.

  - ### isMatch

    public abstract int isMatch(char[] buffer, int pos, int bufferStart, int bufferEnd)
    Deprecated.
    Returns the number of matching characters, or zero if there is no match.

    This method is called to check for a match. The parameter `pos` represents the current position to be checked in the string `buffer` (a character array which must not be changed). The API guarantees that `pos` is a valid index for `buffer`.

    The character array may be larger than the active area to be matched. Only values in the buffer between the specified indices may be accessed.

    The matching code may check one character or many. It may check characters preceding `pos` as well as those after, so long as no checks exceed the bounds specified.

    It must return zero for no match, or a positive number if a match was found. The number indicates the number of characters that matched.

    Parameters:
      `buffer` - the text content to match against, do not change.
      `pos` - the starting position for the match, valid for buffer.
      `bufferStart` - the first active index in the buffer, valid for buffer.
      `bufferEnd` - the end index (exclusive) of the active buffer, valid for buffer.
    Returns:
      The number of matching characters, or zero if there is no match.