enumeration.biginteger
Class BIEnumerator

java.lang.Object
  enumeration.MyEnumerator
      enumeration.biginteger.BIEnumerator

public class BIEnumerator
extends MyEnumerator

Enumerator, using big integer as the type of volume data to compute and store the specific volume data.

Author:

XZW

Field Summary

NextMode

nextMode Next mode : bottom up or top down

Fields inherited from class enumeration.MyEnumerator

resultType

Constructor Summary

BIEnumerator(MyGrammar grammar)
Creates an instance of enumerator.

Method Summary

java.math.BigInteger	getClusterData(int n, int pi) Returns the volume data cluster[n][pi].
java.math.BigInteger	getCubeData(int n, int pi, int k) Returns the volume data cube[n][pi][k].
java.math.BigInteger	getCurrentSequence() Returns the current sequence.
java.math.BigInteger	getHeapData(int n, int i) Returns the volume data heap[n][i].
java.math.BigInteger	getHierarchyData(int n, int i) Returns the volume data hierarchy[n][i].
java.math.BigInteger	L2N(java.lang.String sentence) Returns the sequence number of a given element (sentence represent) if the sentence does not belong to the grammar, return -1;
java.lang.String	N2L(java.math.BigInteger q) Returns the q-th element
java.lang.String	next() Generates the next element.
java.lang.String	next(java.lang.String ctree, java.math.BigInteger q) Returns the next concise tree of a given concise tree whose sequence number is q.
java.lang.String	previous() Generates the previous element
void	setGrammar(MyGrammar grammar) Sets the grammar
void	setSentence(java.lang.String sentence) Sets the current sentence.
void	setSequence(java.math.BigInteger q) Sets the current sequence to q.
java.lang.String	start() Returns the first element of L[start]

Methods inherited from class enumeration.MyEnumerator

firstHierarchy, getCurrentTree, getGrammar, getParseTree, getSentence, getStartIndex, lastHierarchy, next, previous, setStartIndex

Methods inherited from class java.lang.Object

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

Field Detail

nextMode

public NextMode nextMode

Next mode : bottom up or top down

Constructor Detail

BIEnumerator

public BIEnumerator(MyGrammar grammar)

Creates an instance of enumerator.

Parameters:

grammar - the grammar for enumeration

Method Detail

setGrammar

public void setGrammar(MyGrammar grammar)

Description copied from class: MyEnumerator

Sets the grammar

Specified by:

setGrammar in class MyEnumerator

Parameters:

grammar - the grammar to set

start

public java.lang.String start()

Description copied from class: MyEnumerator

Returns the first element of L[start]

Overrides:

start in class MyEnumerator

Returns:

the first element of L[start]

next

public java.lang.String next()

Description copied from class: MyEnumerator

Generates the next element.

Overrides:

next in class MyEnumerator

Returns:

the next element.

next

public java.lang.String next(java.lang.String ctree,
                             java.math.BigInteger q)

Returns the next concise tree of a given concise tree whose sequence number is q.

Parameters:

ctree - the given concise tree

q - the given sequence number

Returns:

the next concise tree

previous

public java.lang.String previous()

Description copied from class: MyEnumerator

Generates the previous element

Overrides:

previous in class MyEnumerator

Returns:

the previous element

getHierarchyData

public java.math.BigInteger getHierarchyData(int n,
                                             int i)

Returns the volume data hierarchy[n][i].

Parameters:

n - the hierarchy index

i - the variable index

Returns:

the volume data hierarchy[n][i].

Throws:

java.lang.IllegalArgumentException - if n < 0 or i < 0 or i >= variable number

getHeapData

public java.math.BigInteger getHeapData(int n,
                                        int i)

Returns the volume data heap[n][i].

Parameters:

n - the hierarchy index

i - the variable index

Returns:

the volume data heap[n][i].

Throws:

java.lang.IllegalArgumentException - if n < 0 or i < 0 or i >= variable number

getClusterData

public java.math.BigInteger getClusterData(int n,
                                           int pi)

Returns the volume data cluster[n][pi].

Parameters:

n - the hierarchy index

pi - the production index

Returns:

the volume data cluster[n][pi].

Throws:

java.lang.IllegalArgumentException - if n < 0 or pi is terminal

getCubeData

public java.math.BigInteger getCubeData(int n,
                                        int pi,
                                        int k)

Returns the volume data cube[n][pi][k].

Parameters:

n - the hierarchy index

pi - the production index

k - the cube index (the variable index in the RHS)

Returns:

the volume data cube[n][pi][k].

Throws:

java.lang.IllegalArgumentException - if n < 0 or pi is terminal or k < 0 or k >= the variable number at pi's RHS

getCurrentSequence

public java.math.BigInteger getCurrentSequence()

Returns the current sequence.

Returns:

the current sequence.

setSequence

public void setSequence(java.math.BigInteger q)

Sets the current sequence to q.

Parameters:

q - the sequence

setSentence

public void setSentence(java.lang.String sentence)

Sets the current sentence.

Overrides:

setSentence in class MyEnumerator

Parameters:

sentence - the sentence to set

N2L

public java.lang.String N2L(java.math.BigInteger q)

Returns the q-th element

Parameters:

q - the sequence number

Returns:

the q-th element

L2N

public java.math.BigInteger L2N(java.lang.String sentence)

Returns the sequence number of a given element (sentence represent) if the sentence does not belong to the grammar, return -1;

Parameters:

sentence - the given element (sentence represent)

Returns:

the sequence number