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Jakarta-Regexp 1.2 API: Class RECompiler
org.apache.regexp
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Inner Class Summary | |
(package private) class |
RECompiler.RERange
Local, nested class for maintaining character ranges for character classes. |
Field Summary | |
(package private) static int[] |
bracketEnd
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(package private) static int |
bracketFinished
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(package private) static int[] |
bracketMin
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(package private) static int[] |
bracketOpt
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(package private) static int |
brackets
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(package private) static int[] |
bracketStart
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(package private) static int |
bracketUnbounded
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(package private) static char |
ESC_BACKREF
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(package private) static char |
ESC_CLASS
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(package private) static char |
ESC_COMPLEX
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(package private) static char |
ESC_MASK
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(package private) static java.util.Hashtable |
hashPOSIX
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(package private) int |
idx
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(package private) char[] |
instruction
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(package private) int |
len
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(package private) int |
lenInstruction
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(package private) static int |
maxBrackets
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(package private) static int |
NODE_NORMAL
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(package private) static int |
NODE_NULLABLE
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(package private) static int |
NODE_TOPLEVEL
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(package private) int |
parens
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(package private) java.lang.String |
pattern
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Constructor Summary | |
RECompiler()
Constructor. |
Method Summary | |
(package private) static void |
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(package private) void |
allocBrackets()
Allocate storage for brackets only as needed |
(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 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) char |
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 char ESC_MASK
static final char ESC_BACKREF
static final char ESC_COMPLEX
static final char ESC_CLASS
static final int maxBrackets
static int brackets
static int[] bracketStart
static int[] bracketEnd
static int[] bracketMin
static int[] bracketOpt
static final int bracketUnbounded
static final int bracketFinished
static 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 addvoid 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 programvoid setNextOfEnd(int node, int pointTo)
node
- Start of node chain to traversepointTo
- Node to have the tail of the chain point toint 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 allocBrackets()
void bracket() throws RESyntaxException
RESyntaxException
- Thrown if the regular expression has invalid syntax.char 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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