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Java Source Code / Java Documentation » Apache Harmony Java SE » java package » java.util.regex   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    java.util.regex.Lexer Lexer class Lexer (Code) The purpose of this class is to break given pattern into RE tokens; author:    Nikolay A. Kuznetsov version:    $Revision: 1.21.2.2 $ Field Summary final public static  int CHAR_AMPERSAND      final public static  int CHAR_ATOMIC_GROUP      final public static  int CHAR_CARET      final public static  int CHAR_DOLLAR      final public static  int CHAR_DOT      final public static  int CHAR_END_OF_INPUT      final public static  int CHAR_END_OF_LINE      final public static  int CHAR_FLAGS      final public static  int CHAR_HYPHEN      final public static  int CHAR_LEFT_PARENTHESIS      final public static  int CHAR_LEFT_SQUARE_BRACKET      final public static  int CHAR_NEG_LOOKAHEAD      final public static  int CHAR_NEG_LOOKBEHIND      final public static  int CHAR_NONCAP_GROUP      final public static  int CHAR_NONWORD_BOUND      final public static  int CHAR_POS_LOOKAHEAD      final public static  int CHAR_POS_LOOKBEHIND      final public static  int CHAR_PREVIOUS_MATCH      final public static  int CHAR_RIGHT_PARENTHESIS      final public static  int CHAR_RIGHT_SQUARE_BRACKET      final public static  int CHAR_START_OF_INPUT      final public static  int CHAR_VERTICAL_BAR      final public static  int CHAR_WORD_BOUND      final static  int LBase      final static  int LCount      final static  int MAX_DECOMPOSITION_LENGTH      final static  int MAX_HANGUL_DECOMPOSITION_LENGTH      final public static  int MODE_ESCAPE      final public static  int MODE_PATTERN      final public static  int MODE_RANGE      final static  int NCount      final public static  int QMOD_GREEDY      final public static  int QMOD_POSSESSIVE      final public static  int QMOD_RELUCTANT      final public static  int QUANT_ALT      final public static  int QUANT_ALT_P      final public static  int QUANT_ALT_R      final public static  int QUANT_COMP      final public static  int QUANT_COMP_P      final public static  int QUANT_COMP_R      final public static  int QUANT_PLUS      final public static  int QUANT_PLUS_P      final public static  int QUANT_PLUS_R      final public static  int QUANT_STAR      final public static  int QUANT_STAR_P      final public static  int QUANT_STAR_R      final static  int SBase      final static  int SCount      final static  int TBase      final static  int TCount      final static  int VBase      final static  int VCount      Constructor Summary public   Lexer(String pattern, int flags)      Method Summary public  int back()      Returns previous character. static  int getCanonicalClass(int ch)      Gets canonical class for given codepoint from decomposition mappings table. static  int[] getCanonicalOrder(int[] inputInts, int length)      Rearrange codepoints according to canonical order. static  int[] getDecomposition(int ch)      Gets decomposition for given codepoint from decomposition mappings table. static  int[] getHangulDecomposition(int ch)      Gets decomposition for given Hangul syllable. public  int getIndex()      Returns the curr. static  boolean hasDecompositionNonNullCanClass(int ch)      Tests if given codepoint has canonical decomposition and given codepoint's canonical class is not 0. static  boolean hasSingleCodepointDecomposition(int ch)      Tests if given codepoint is a canonical decomposition of another codepoint. static  boolean isDecomposedCharBoundary(int ch)      Tests Unicode codepoint if it is a boundary of decomposed Unicode codepoint. public  boolean isEmpty()      Checks if there are any characters in the pattern. public  boolean isHighSurrogate()      public static  boolean isHighSurrogate(int ch)      public static  boolean isLetter(int ch)      Returns true if current character is plain token. public  boolean isLetter()      Return true if current character is letter, false otherwise; This is shortcut to static method isLetter to check the current character. public  boolean isLowSurrogate()      public static  boolean isLowSurrogate(int ch)      public  boolean isNextSpecial()      public  boolean isQuantifier()      public  boolean isSpecial()      Returns true, if current token is special, i.e. public  int lookAhead()      Returns nest symbol read. public  int next()      public  SpecialToken nextSpecial()      static  String normalize(String input)      Normalize given expression. public  int peek()      public  SpecialToken peekSpecial()      public  void restoreFlags(int flags)      public  void setMode(int mode)      Set the Lexer to PATTERN or RANGE mode; Lexer interpret character two different ways in parser or range modes. public  String toString()      Field Detail CHAR_AMPERSAND final public static int CHAR_AMPERSAND(Code) CHAR_ATOMIC_GROUP final public static int CHAR_ATOMIC_GROUP(Code) CHAR_CARET final public static int CHAR_CARET(Code) CHAR_DOLLAR final public static int CHAR_DOLLAR(Code) CHAR_DOT final public static int CHAR_DOT(Code) CHAR_END_OF_INPUT final public static int CHAR_END_OF_INPUT(Code) CHAR_END_OF_LINE final public static int CHAR_END_OF_LINE(Code) CHAR_FLAGS final public static int CHAR_FLAGS(Code) CHAR_HYPHEN final public static int CHAR_HYPHEN(Code) CHAR_LEFT_PARENTHESIS final public static int CHAR_LEFT_PARENTHESIS(Code) CHAR_LEFT_SQUARE_BRACKET final public static int CHAR_LEFT_SQUARE_BRACKET(Code) CHAR_NEG_LOOKAHEAD final public static int CHAR_NEG_LOOKAHEAD(Code) CHAR_NEG_LOOKBEHIND final public static int CHAR_NEG_LOOKBEHIND(Code) CHAR_NONCAP_GROUP final public static int CHAR_NONCAP_GROUP(Code) CHAR_NONWORD_BOUND final public static int CHAR_NONWORD_BOUND(Code) CHAR_POS_LOOKAHEAD final public static int CHAR_POS_LOOKAHEAD(Code) CHAR_POS_LOOKBEHIND final public static int CHAR_POS_LOOKBEHIND(Code) CHAR_PREVIOUS_MATCH final public static int CHAR_PREVIOUS_MATCH(Code) CHAR_RIGHT_PARENTHESIS final public static int CHAR_RIGHT_PARENTHESIS(Code) CHAR_RIGHT_SQUARE_BRACKET final public static int CHAR_RIGHT_SQUARE_BRACKET(Code) CHAR_START_OF_INPUT final public static int CHAR_START_OF_INPUT(Code) CHAR_VERTICAL_BAR final public static int CHAR_VERTICAL_BAR(Code) CHAR_WORD_BOUND final public static int CHAR_WORD_BOUND(Code) LBase final static int LBase(Code) LCount final static int LCount(Code) MAX_DECOMPOSITION_LENGTH final static int MAX_DECOMPOSITION_LENGTH(Code) MAX_HANGUL_DECOMPOSITION_LENGTH final static int MAX_HANGUL_DECOMPOSITION_LENGTH(Code) MODE_ESCAPE final public static int MODE_ESCAPE(Code) MODE_PATTERN final public static int MODE_PATTERN(Code) MODE_RANGE final public static int MODE_RANGE(Code) NCount final static int NCount(Code) QMOD_GREEDY final public static int QMOD_GREEDY(Code) QMOD_POSSESSIVE final public static int QMOD_POSSESSIVE(Code) QMOD_RELUCTANT final public static int QMOD_RELUCTANT(Code) QUANT_ALT final public static int QUANT_ALT(Code) QUANT_ALT_P final public static int QUANT_ALT_P(Code) QUANT_ALT_R final public static int QUANT_ALT_R(Code) QUANT_COMP final public static int QUANT_COMP(Code) QUANT_COMP_P final public static int QUANT_COMP_P(Code) QUANT_COMP_R final public static int QUANT_COMP_R(Code) QUANT_PLUS final public static int QUANT_PLUS(Code) QUANT_PLUS_P final public static int QUANT_PLUS_P(Code) QUANT_PLUS_R final public static int QUANT_PLUS_R(Code) QUANT_STAR final public static int QUANT_STAR(Code) QUANT_STAR_P final public static int QUANT_STAR_P(Code) QUANT_STAR_R final public static int QUANT_STAR_R(Code) SBase final static int SBase(Code) SCount final static int SCount(Code) TBase final static int TBase(Code) TCount final static int TCount(Code) VBase final static int VBase(Code) VCount final static int VCount(Code) Constructor Detail Lexer public Lexer(String pattern, int flags)(Code) Method Detail back public int back()(Code) Returns previous character. getCanonicalClass static int getCanonicalClass(int ch)(Code) Gets canonical class for given codepoint from decomposition mappings table. - ch Unicode codepoint canonical class for given Unicode codepointthat is represented by ch. getCanonicalOrder static int[] getCanonicalOrder(int[] inputInts, int length)(Code) Rearrange codepoints according to canonical order. Parameters:   inputInts - - array that contains Unicode codepoints Parameters:   length - - index of last Unicode codepoint plus 1 array that contains rearranged codepoints. getDecomposition static int[] getDecomposition(int ch)(Code) Gets decomposition for given codepoint from decomposition mappings table. Parameters:   ch - - Unicode codepoint array of codepoints that is a canonicaldecomposition of ch. getHangulDecomposition static int[] getHangulDecomposition(int ch)(Code) Gets decomposition for given Hangul syllable. This is an implementation of Hangul decomposition algorithm according to http://www.unicode.org/versions/Unicode4.0.0/ch03.pdf "3.12 Conjoining Jamo Behavior". Parameters:   ch - - given Hangul syllable canonical decomposition of ch. getIndex public int getIndex()(Code) Returns the curr. character index. hasDecompositionNonNullCanClass static boolean hasDecompositionNonNullCanClass(int ch)(Code) Tests if given codepoint has canonical decomposition and given codepoint's canonical class is not 0. Parameters:   ch - - codepoint to test true if canonical class is not 0 and ch has a decomposition. hasSingleCodepointDecomposition static boolean hasSingleCodepointDecomposition(int ch)(Code) Tests if given codepoint is a canonical decomposition of another codepoint. Parameters:   ch - - codepoint to test true if ch is a decomposition. isDecomposedCharBoundary static boolean isDecomposedCharBoundary(int ch)(Code) Tests Unicode codepoint if it is a boundary of decomposed Unicode codepoint. Parameters:   ch - - Unicode codepoint to test true if given codepoint is a boundary. isEmpty public boolean isEmpty()(Code) Checks if there are any characters in the pattern. true if there are no more characters in the pattern. isHighSurrogate public boolean isHighSurrogate()(Code) isHighSurrogate public static boolean isHighSurrogate(int ch)(Code) isLetter public static boolean isLetter(int ch)(Code) Returns true if current character is plain token. isLetter public boolean isLetter()(Code) Return true if current character is letter, false otherwise; This is shortcut to static method isLetter to check the current character. true if current character is letter, false otherwise isLowSurrogate public boolean isLowSurrogate()(Code) isLowSurrogate public static boolean isLowSurrogate(int ch)(Code) isNextSpecial public boolean isNextSpecial()(Code) isQuantifier public boolean isQuantifier()(Code) isSpecial public boolean isSpecial()(Code) Returns true, if current token is special, i.e. quantifier, or other compound token. - true if current token is special, false otherwise. lookAhead public int lookAhead()(Code) Returns nest symbol read. next public int next()(Code) Returns current character and moves string index to the next one; nextSpecial public SpecialToken nextSpecial()(Code) Returns current special token and moves string index to the next one; normalize static String normalize(String input)(Code) Normalize given expression. Parameters:   input - - expression to normalize normalized expression. peek public int peek()(Code) Returns current character w/o reading next one; if there are no more characters returns 0; current character; peekSpecial public SpecialToken peekSpecial()(Code) restoreFlags public void restoreFlags(int flags)(Code) Restores flags for Lexer Parameters:   flags - setMode public void setMode(int mode)(Code) Set the Lexer to PATTERN or RANGE mode; Lexer interpret character two different ways in parser or range modes. Parameters:   mode - Lexer.PATTERN or Lexer.RANGE toString public String toString()(Code) Methods inherited from java.lang.Object protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object object)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final public Class<? extends Object> getClass()(Code)(Java Doc) public int hashCode()(Code)(Java Doc) final public void notify()(Code)(Java Doc) final public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final public void wait(long millis, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait(long millis) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)