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java.lang.Object | +--org.apache.regexp.RECompiler
A regular expression compiler class. This class compiles a pattern string into a regular expression program interpretable by the RE evaluator class. The 'recompile' command line tool uses this compiler to pre-compile regular expressions for use with RE. For a description of the syntax accepted by RECompiler and what you can do with regular expressions, see the documentation for the RE matcher class.
RE, 
recompile| Inner Class Summary | |
| (package private)  class | RECompiler.RERangeLocal, nested class for maintaining character ranges for character classes. | 
| Field Summary | |
| (package private)  int | bracketMin | 
| (package private)  int | bracketOpt | 
| (package private) static int | bracketUnbounded | 
| (package private) static int | ESC_BACKREF | 
| (package private) static int | ESC_CLASS | 
| (package private) static int | ESC_COMPLEX | 
| (package private) static int | ESC_MASK | 
| (package private) static java.util.Hashtable | hashPOSIX | 
| (package private)  int | idx | 
| (package private)  char[] | instruction | 
| (package private)  int | len | 
| (package private)  int | lenInstruction | 
| (package private) static int | NODE_NORMAL | 
| (package private) static int | NODE_NULLABLE | 
| (package private) static int | NODE_TOPLEVEL | 
| (package private)  int | parens | 
| (package private)  java.lang.String | pattern | 
| Constructor Summary | |
| RECompiler()Constructor. | |
| Method Summary | |
| (package private) static void |  | 
| (package private)  int | atom()Absorb an atomic character string. | 
| (package private)  void | bracket()Match bracket {m,n} expression put results in bracket member variables | 
| (package private)  int | branch(int[] flags)Compile body of one branch of an or operator (implements concatenation) | 
| (package private)  int | characterClass()Compile a character class | 
| (package private)  int | closure(int[] flags)Compile a possibly closured terminal | 
|  REProgram | compile(java.lang.String pattern)Compiles a regular expression pattern into a program runnable by the pattern matcher class 'RE'. | 
| (package private)  void | emit(char c)Emit a single character into the program stream. | 
| (package private)  void | ensure(int n)Ensures that n more characters can fit in the program buffer. | 
| (package private)  int | escape()Match an escape sequence. | 
| (package private)  int | expr(int[] flags)Compile an expression with possible parens around it. | 
| (package private)  void | internalError()Throws a new internal error exception | 
| (package private)  int | node(char opcode,
     int opdata)Adds a new node | 
| (package private)  void | nodeInsert(char opcode,
           int opdata,
           int insertAt)Inserts a node with a given opcode and opdata at insertAt. | 
| (package private)  void | setNextOfEnd(int node,
             int pointTo)Appends a node to the end of a node chain | 
| (package private)  void | syntaxError(java.lang.String s)Throws a new syntax error exception | 
| (package private)  int | terminal(int[] flags)Match a terminal node. | 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait | 
| Field Detail | 
char[] instruction
int lenInstruction
java.lang.String pattern
int len
int idx
int parens
static final int NODE_NORMAL
static final int NODE_NULLABLE
static final int NODE_TOPLEVEL
static final int ESC_MASK
static final int ESC_BACKREF
static final int ESC_COMPLEX
static final int ESC_CLASS
static final int bracketUnbounded
int bracketMin
int bracketOpt
static final java.util.Hashtable hashPOSIX
| Constructor Detail | 
public RECompiler()
| Method Detail | 
static void() 
void ensure(int n)
n - Number of additional characters to ensure will fit.void emit(char c)
c - Character to add
void nodeInsert(char opcode,
                int opdata,
                int insertAt)
opcode - Opcode for new nodeopdata - Opdata for new node (only the low 16 bits are currently used)insertAt - Index at which to insert the new node in the program
void setNextOfEnd(int node,
                  int pointTo)
node - Start of node chain to traversepointTo - Node to have the tail of the chain point to
int node(char opcode,
         int opdata)
opcode - Opcode for nodeopdata - Opdata for node (only the low 16 bits are currently used)
void internalError()
             throws java.lang.Error
java.lang.Error - Thrown in the event of an internal error.
void syntaxError(java.lang.String s)
           throws RESyntaxException
RESyntaxException - Thrown if the regular expression has invalid syntax.
void bracket()
       throws RESyntaxException
RESyntaxException - Thrown if the regular expression has invalid syntax.
int escape()
     throws RESyntaxException
RESyntaxException - Thrown if the regular expression has invalid syntax.
int characterClass()
             throws RESyntaxException
RESyntaxException - Thrown if the regular expression has invalid syntax.int atom() throws RESyntaxException
RESyntaxException - Thrown if the regular expression has invalid syntax.
int terminal(int[] flags)
       throws RESyntaxException
flags - FlagsRESyntaxException - Thrown if the regular expression has invalid syntax.
int closure(int[] flags)
      throws RESyntaxException
flags - Flags passed by referenceRESyntaxException - Thrown if the regular expression has invalid syntax.
int branch(int[] flags)
     throws RESyntaxException
flags - Flags passed by referenceRESyntaxException - Thrown if the regular expression has invalid syntax.int expr(int[] flags) throws RESyntaxException
flags - Flag value passed by referenceRESyntaxException - Thrown if the regular expression has invalid syntax.
public REProgram compile(java.lang.String pattern)
                  throws RESyntaxException
pattern - Regular expression pattern to compile (see RECompiler class
 for details).RESyntaxException - Thrown if the regular expression has invalid syntax.RECompiler, 
RE| 
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