StrMatcher (Apache Commons Lang 3.2 API)

java.lang.Object
- org.apache.commons.lang3.text.StrMatcher

```
public abstract class StrMatcher
extends Object
```
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:

2.2

Version:

$Id: StrMatcher.java 1436770 2013-01-22 07:09:45Z ggregory $

Constructor Summary

Constructors
Modifier Constructor and Description

protected StrMatcher()
Constructor.

Constructors
Modifier	Constructor and Description
`protected`	`StrMatcher()` Constructor.

Method Summary

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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - StrMatcher
```
protected StrMatcher()
```
    Constructor.
- Method Detail
  - commaMatcher
```
public static StrMatcher commaMatcher()
```
    Returns a matcher which matches the comma character.
    
    Returns:
    a matcher for a comma
  - tabMatcher
```
public static StrMatcher tabMatcher()
```
    Returns a matcher which matches the tab character.
    
    Returns:
    a matcher for a tab
  - spaceMatcher
```
public static StrMatcher spaceMatcher()
```
    Returns a matcher which matches the space character.
    
    Returns:
    a matcher for a space
  - splitMatcher
```
public static StrMatcher splitMatcher()
```
    Matches the same characters as StringTokenizer, namely space, tab, newline and formfeed.
    
    Returns:
    the split matcher
  - trimMatcher
```
public static StrMatcher trimMatcher()
```
    Matches the String trim() whitespace characters.
    
    Returns:
    the trim matcher
  - singleQuoteMatcher
```
public static StrMatcher singleQuoteMatcher()
```
    Returns a matcher which matches the single quote character.
    
    Returns:
    a matcher for a single quote
  - doubleQuoteMatcher
```
public static StrMatcher doubleQuoteMatcher()
```
    Returns a matcher which matches the double quote character.
    
    Returns:
    a matcher for a double quote
  - quoteMatcher
```
public static StrMatcher quoteMatcher()
```
    Returns a matcher which matches the single or double quote character.
    
    Returns:
    a matcher for a single or double quote
  - noneMatcher
```
public static StrMatcher noneMatcher()
```
    Matches no characters.
    
    Returns:
    a matcher that matches nothing
  - charMatcher
```
public static StrMatcher charMatcher(char ch)
```
    Constructor that 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)
```
    Constructor that 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)
```
    Constructor that 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
  - stringMatcher
```
public static StrMatcher stringMatcher(String str)
```
    Constructor that 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
  - isMatch
```
public abstract int isMatch(char[] buffer,
          int pos,
          int bufferStart,
          int bufferEnd)
```
    Returns the number of matching characters, zero for 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 specifed 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, zero for no match
  - isMatch
```
public int isMatch(char[] buffer,
          int pos)
```
    Returns the number of matching characters, zero for 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, zero for no match
    Since:
    
    2.4

Class StrMatcher

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

StrMatcher

Method Detail

commaMatcher

tabMatcher

spaceMatcher

splitMatcher

trimMatcher

singleQuoteMatcher

doubleQuoteMatcher

quoteMatcher

noneMatcher

charMatcher

charSetMatcher

charSetMatcher

stringMatcher

isMatch

isMatch