net.sf.saxon.regex

Class Operation

java.lang.Object

net.sf.saxon.regex.Operation

Direct Known Subclasses:

Operation.OpAtom, Operation.OpBackReference, Operation.OpBOL, Operation.OpBranch, Operation.OpCharClass, Operation.OpClose, Operation.OpCloseCluster, Operation.OpConfidentPlus, Operation.OpConfidentStar, Operation.OpContinue, Operation.OpEndProgram, Operation.OpEOL, Operation.OpGoTo, Operation.OpMaybe, Operation.OpNothing, Operation.OpOpen, Operation.OpOpenCluster, Operation.OpPlus, Operation.OpReluctantMaybe, Operation.OpReluctantPlus, Operation.OpReluctantStar, Operation.OpStar

public abstract class Operation
extends Object

Represents an operation or instruction in the regular expression program. The class Operation is abstract, and has concrete subclasses for each kind of operation/instruction

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Operation.OpAtom Atom
static class	Operation.OpBackReference Back-reference
static class	Operation.OpBOL Beginning of Line (^)
static class	Operation.OpBranch Choice (|)
static class	Operation.OpCharClass Character class: match any one of a set of characters
static class	Operation.OpClose Close paren (captured group)
static class	Operation.OpCloseCluster Close non-capturing group
static class	Operation.OpConfidentPlus "Confident Plus" quantifier: used when there is no ambiguity about the ending condition, and therefore no need to backtrack.
static class	Operation.OpConfidentStar "Confident Star" quantifier: used when there is no ambiguity about the ending condition, and therefore no need to backtrack.
static class	Operation.OpContinue Continue to the following instruction (ignore 'next')
static class	Operation.OpEndProgram End of program
static class	Operation.OpEOL End of Line ($)
static class	Operation.OpGoTo Goto specified instruction
static class	Operation.OpMaybe Maybe (question-mark) quantifier
static class	Operation.OpNothing Match empty string
static class	Operation.OpOpen Open paren (captured group)
static class	Operation.OpOpenCluster Open non-capturing paren
static class	Operation.OpPlus Plus quantifier
static class	Operation.OpReluctantMaybe Reluctant maybe operator
static class	Operation.OpReluctantPlus Reluctant plus operator
static class	Operation.OpReluctantStar Reluctant star operator
static class	Operation.OpStar Star quantifier

Field Summary

Fields

Modifier and Type	Field and Description
static int	ACTION_ADVANCE_TO_FOLLOWING
static int	ACTION_ADVANCE_TO_NEXT
static int	ACTION_ADVANCE_TO_NEXT_NEXT
static int	ACTION_RETURN
int	next

Constructor Summary

Constructors

Constructor and Description
Operation()

Method Summary

Methods

Modifier and Type	Method and Description
int	nextAction(int idx) Determine the action to take after calling exec()

Methods inherited from class java.lang.Object

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

Field Detail

next

public int next

ACTION_ADVANCE_TO_NEXT

public static final int ACTION_ADVANCE_TO_NEXT

See Also:

Constant Field Values

ACTION_RETURN

public static final int ACTION_RETURN

See Also:

Constant Field Values

ACTION_ADVANCE_TO_FOLLOWING

public static final int ACTION_ADVANCE_TO_FOLLOWING

See Also:

Constant Field Values

ACTION_ADVANCE_TO_NEXT_NEXT

public static final int ACTION_ADVANCE_TO_NEXT_NEXT

See Also:

Constant Field Values

Constructor Detail

Operation

public Operation()

Method Detail

nextAction

public int nextAction(int idx)

Determine the action to take after calling exec()

Parameters:

idx - the value returned by exec()

Returns:

one of the values ACTION_RETURN, ACTION_ADVANCE_TO_NEXT, ...