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gnu.regexp
Class RETokenBackRef  

java.lang.Object
  gnu.regexp.REToken
      gnu.regexp.RETokenBackRef

All Implemented Interfaces:

java.lang.Cloneable, java.io.Serializable

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final class RETokenBackRef

extends REToken

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Field Summary
private  boolean	insens
protected  REToken	next
private  int	num
protected  int	subIndex
protected  REToken	uncle
protected  boolean	unicodeAware

 

Constructor Summary
(package private)	RETokenBackRef(int subIndex, int num, boolean insens)

 

Method Summary
(package private)  REMatch	backtrack(CharIndexed input, REMatch mymatch, java.lang.Object param)           Backtrack to another possibility.
(package private)  boolean	chain(REToken token)
java.lang.Object	clone()           This method may be called to create a new copy of the Object.
(package private)  void	dump(java.lang.StringBuffer os)
(package private)  void	dumpAll(java.lang.StringBuffer os)
(package private)  int	findFixedLengthMatches(CharIndexed input, REMatch mymatch, int max)
(package private)  REMatch	findMatch(CharIndexed input, REMatch mymatch)           Finds a match at the position specified by the given REMatch.
(package private)  int	getMaximumLength()
(package private)  int	getMinimumLength()
(package private)  REToken	getNext()           Returns the next REToken chained to this REToken.
(package private)  boolean	match(CharIndexed input, REMatch mymatch)           Returns true if the match succeeded, false if it failed.
(package private)  REMatch	matchThis(CharIndexed input, REMatch mymatch)           Returns true if the match succeeded, false if it failed.
protected  boolean	next(CharIndexed input, REMatch mymatch)           Returns true if the rest of the tokens match, false if they fail.
(package private)  boolean	returnsFixedLengthMatches()
(package private)  void	setUncle(REToken anUncle)
static char	toLowerCase(char ch, boolean unicodeAware)           Converts the character argument to lowercase.
java.lang.String	toString()           Convert this Object to a human-readable String.
static char	toUpperCase(char ch, boolean unicodeAware)           Converts the character argument to uppercase.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

num

private int num

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insens

private boolean insens

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next

protected REToken next

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uncle

protected REToken uncle

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subIndex

protected int subIndex

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unicodeAware

protected boolean unicodeAware

Constructor Detail

RETokenBackRef

RETokenBackRef(int subIndex,
               int num,
               boolean insens)

Method Detail

matchThis

REMatch matchThis(CharIndexed input,
                  REMatch mymatch)

Description copied from class: REToken

Returns true if the match succeeded, false if it failed. The matching is done against this REToken only. Chained tokens are not checked. This method is used to define the default match method. Simple subclasses of REToken, for example, such that matches only one character, should implement this method. Then the default match method will work. But complicated subclasses of REToken, which needs a special match method, do not have to implement this method.

Overrides:

matchThis in class REToken

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dump

void dump(java.lang.StringBuffer os)

Specified by:

dump in class REToken

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clone

public java.lang.Object clone()

Description copied from class: java.lang.Object

This method may be called to create a new copy of the Object. The typical behavior is as follows:

• o == o.clone() is false
• o.getClass() == o.clone().getClass() is true
• o.equals(o) is true

However, these are not strict requirements, and may be violated if necessary. Of the three requirements, the last is the most commonly violated, particularly if the subclass does not override Object.equals(Object)>Object.equals(Object) 55 .

If the Object you call clone() on does not implement java.lang.Cloneable (which is a placeholder interface), then a CloneNotSupportedException is thrown. Notice that Object does not implement Cloneable; this method exists as a convenience for subclasses that do.

Object's implementation of clone allocates space for the new Object using the correct class, without calling any constructors, and then fills in all of the new field values with the old field values. Thus, it is a shallow copy. However, subclasses are permitted to make a deep copy.

All array types implement Cloneable, and override this method as follows (it should never fail):

 public Object clone()
 {
   try
     {
       super.clone();
     }
   catch (CloneNotSupportedException e)
     {
       throw new InternalError(e.getMessage());
     }
 }
 

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getMinimumLength

int getMinimumLength()

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getMaximumLength

int getMaximumLength()

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setUncle

void setUncle(REToken anUncle)

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match

boolean match(CharIndexed input,
              REMatch mymatch)

Returns true if the match succeeded, false if it failed.

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next

protected boolean next(CharIndexed input,
                       REMatch mymatch)

Returns true if the rest of the tokens match, false if they fail.

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getNext

REToken getNext()

Returns the next REToken chained to this REToken.

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findMatch

REMatch findMatch(CharIndexed input,
                  REMatch mymatch)

Finds a match at the position specified by the given REMatch. If necessary, adds a BacktrackStack.Backtrack object to backtrackStack of the REmatch found this time so that another possible match may be found when backtrack is called. By default, nothing is added to the backtrackStack.

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returnsFixedLengthMatches

boolean returnsFixedLengthMatches()

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findFixedLengthMatches

int findFixedLengthMatches(CharIndexed input,
                           REMatch mymatch,
                           int max)

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backtrack

REMatch backtrack(CharIndexed input,
                  REMatch mymatch,
                  java.lang.Object param)

Backtrack to another possibility. Ordinary REToken cannot do anything if this method is called.

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chain

boolean chain(REToken token)

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dumpAll

void dumpAll(java.lang.StringBuffer os)

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toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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toLowerCase

public static char toLowerCase(char ch,
                               boolean unicodeAware)

Converts the character argument to lowercase.

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toUpperCase

public static char toUpperCase(char ch,
                               boolean unicodeAware)

Converts the character argument to uppercase.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> gnu >> [ regexp overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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