public final class FSA5 extends FSA
Version 5 indicates the dictionary was built with these flags:
FSAFlags.FLEXIBLE
, FSAFlags.STOPBIT
and
FSAFlags.NEXTBIT
. The internal representation of the FSA must
therefore follow this description (please note this format describes only a
single transition (arc), not the entire dictionary file).
---- this node header present only if automaton was compiled with NUMBERS option. Byte +-+-+-+-+-+-+-+-+\ 0 | | | | | | | | | \ LSB +-+-+-+-+-+-+-+-+ + 1 | | | | | | | | | | number of strings recognized +-+-+-+-+-+-+-+-+ +----- by the automaton starting : : : : : : : : : | from this node. +-+-+-+-+-+-+-+-+ + ctl-1 | | | | | | | | | / MSB +-+-+-+-+-+-+-+-+/ ---- remaining part of the node Byte +-+-+-+-+-+-+-+-+\ 0 | | | | | | | | | +------ label +-+-+-+-+-+-+-+-+/ +------------- node pointed to is next | +----------- the last arc of the node | | +--------- the arc is final | | | +-----------+ | | | | | ___+___ | | | | / \ | | | | MSB LSB | 7 6 5 4 3 2 1 0 | +-+-+-+-+-+-+-+-+ | 1 | | | | | | | | | \ \ +-+-+-+-+-+-+-+-+ \ \ LSB +-+-+-+-+-+-+-+-+ + 2 | | | | | | | | | | +-+-+-+-+-+-+-+-+ | 3 | | | | | | | | | +----- target node address (in bytes) +-+-+-+-+-+-+-+-+ | (not present except for the byte : : : : : : : : : | with flags if the node pointed to +-+-+-+-+-+-+-+-+ + is next) gtl | | | | | | | | | / MSB +-+-+-+-+-+-+-+-+ / gtl+1 (gtl = gotoLength)
Modifier and Type | Field and Description |
---|---|
static int |
ADDRESS_OFFSET
An offset in the arc structure, where the address and flags field begins.
|
byte |
annotation
Annotation character.
|
byte[] |
arcs
An array of bytes with the internal representation of the automaton.
|
static int |
BIT_FINAL_ARC
Bit indicating that an arc corresponds to the last character of a sequence
available when building the automaton.
|
static int |
BIT_LAST_ARC
Bit indicating that an arc is the last one of the node's list and the
following one belongs to another node.
|
static int |
BIT_TARGET_NEXT
Bit indicating that the target node of this arc follows it in the
compressed automaton structure (no goto field).
|
static byte |
DEFAULT_ANNOTATION
Default annotation byte.
|
static byte |
DEFAULT_FILLER
Default filler byte.
|
byte |
filler
Filler character.
|
int |
gtl
Number of bytes each address takes in full, expanded form (goto length).
|
int |
nodeDataLength
The length of the node header structure (if the automaton was compiled with
NUMBERS option). |
static byte |
VERSION
Automaton version as in the file header.
|
Modifier and Type | Method and Description |
---|---|
int |
getArc(int node,
byte label) |
byte |
getArcLabel(int arc) |
int |
getEndNode(int arc) |
int |
getFirstArc(int node) |
Set<FSAFlags> |
getFlags() |
int |
getNextArc(int arc) |
int |
getRightLanguageCount(int node)
Returns the number encoded at the given node.
|
int |
getRootNode()
Returns the start node of this automaton.
|
boolean |
isArcFinal(int arc) |
boolean |
isArcLast(int arc)
Returns
true if this arc has NEXT bit set. |
boolean |
isArcTerminal(int arc) |
boolean |
isNextSet(int arc) |
getArcCount, getSequences, getSequences, iterator, read, read, readRemaining, visitAllStates, visitInPostOrder, visitInPostOrder, visitInPreOrder, visitInPreOrder
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
forEach, spliterator
public static final byte DEFAULT_FILLER
public static final byte DEFAULT_ANNOTATION
public static final byte VERSION
public static final int BIT_FINAL_ARC
public static final int BIT_LAST_ARC
public static final int BIT_TARGET_NEXT
public static final int ADDRESS_OFFSET
public final byte[] arcs
public final int nodeDataLength
NUMBERS
option). Otherwise zero.public final int gtl
public final byte filler
public final byte annotation
public int getRootNode()
getRootNode
in class FSA
public final int getFirstArc(int node)
getFirstArc
in class FSA
node
- Identifier of the node.node
or 0 if the node has no outgoing arcs.public final int getNextArc(int arc)
getNextArc
in class FSA
arc
- The arc's identifier.arc
and
leaving node
. Zero is returned if no more arcs are
available for the node.public int getArc(int node, byte label)
public int getEndNode(int arc)
getEndNode
in class FSA
arc
- The arc's identifier.arc
.
Terminal arcs (those that point to a terminal state) have no end
node representation and throw a runtime exception.public byte getArcLabel(int arc)
getArcLabel
in class FSA
arc
- The arc's identifier.arc
.public boolean isArcFinal(int arc)
isArcFinal
in class FSA
arc
- The arc's identifier.true
if the destination node at the end of
this arc
corresponds to an input sequence created when
building this automaton.public boolean isArcTerminal(int arc)
isArcTerminal
in class FSA
arc
- The arc's identifier.true
if this arc
does not have a
terminating node (@link FSA.getEndNode(int)
will throw an
exception). Implies FSA.isArcFinal(int)
.public int getRightLanguageCount(int node)
node
(called its right
language).getRightLanguageCount
in class FSA
node
- Identifier of the node.FSAFlags.NUMBERS
. The size
of the right language of the state, in other words.public Set<FSAFlags> getFlags()
For this automaton version, an additional FSAFlags.NUMBERS
flag may
be set to indicate the automaton contains extra fields for each node.
public boolean isArcLast(int arc)
true
if this arc has NEXT
bit set.arc
- The node's arc identifier.BIT_LAST_ARC
public boolean isNextSet(int arc)
arc
- The node's arc identifier.BIT_TARGET_NEXT
is set for this arc.BIT_TARGET_NEXT
Copyright © 2016. All rights reserved.