Class SnowballProgram

This is the rev 502 of the Snowball SVN trunk, but modified: made abstract and introduced abstract method stem to avoid expensive reflection in filter class. refactored StringBuffers to StringBuilder uses char[] as buffer instead of StringBuffer/StringBuilder eq_s,eq_s_b,insert,replace_s take CharSequence like eq_v and eq_v_b reflection calls (Lovins, etc) use EMPTY_ARGS/EMPTY_PARAMS

Inheritance
System.Object
SnowballProgram
ArmenianStemmer
BasqueStemmer
CatalanStemmer
DanishStemmer
DutchStemmer
EnglishStemmer
FinnishStemmer
FrenchStemmer
German2Stemmer
GermanStemmer
HungarianStemmer
IrishStemmer
ItalianStemmer
KpStemmer
LovinsStemmer
NorwegianStemmer
PorterStemmer
PortugueseStemmer
RomanianStemmer
RussianStemmer
SpanishStemmer
SwedishStemmer
TurkishStemmer
Namespace: Lucene.Net.Tartarus.Snowball
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
public abstract class SnowballProgram : object

Constructors

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SnowballProgram()

Declaration
protected SnowballProgram()

Fields

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m_bra

Declaration
protected int m_bra
Field Value
Type Description
System.Int32
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m_current

Declaration
protected char[] m_current
Field Value
Type Description
System.Char[]
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m_cursor

Declaration
protected int m_cursor
Field Value
Type Description
System.Int32
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m_ket

Declaration
protected int m_ket
Field Value
Type Description
System.Int32
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m_limit

Declaration
protected int m_limit
Field Value
Type Description
System.Int32
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m_limit_backward

Declaration
protected int m_limit_backward
Field Value
Type Description
System.Int32

Properties

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Current

Get the current string.

Declaration
public virtual string Current { get; }
Property Value
Type Description
System.String
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CurrentBuffer

Get the current buffer containing the stem.

NOTE: this may be a reference to a different character array than the one originally provided with setCurrent, in the exceptional case that stemming produced a longer intermediate or result string.

It is necessary to use CurrentBufferLength to determine the valid length of the returned buffer. For example, many words are stemmed simply by subtracting from the length to remove suffixes.

Declaration
public virtual char[] CurrentBuffer { get; }
Property Value
Type Description
System.Char[]
See Also
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CurrentBufferLength

Get the valid length of the character array in CurrentBuffer

Declaration
public virtual int CurrentBufferLength { get; }
Property Value
Type Description
System.Int32

Methods

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AssignTo(StringBuilder)

Declaration
protected virtual StringBuilder AssignTo(StringBuilder s)
Parameters
Type Name Description
StringBuilder s
Returns
Type Description
StringBuilder
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CopyFrom(SnowballProgram)

Declaration
protected virtual void CopyFrom(SnowballProgram other)
Parameters
Type Name Description
SnowballProgram other
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Eq_S(Int32, String)

Declaration
protected virtual bool Eq_S(int s_size, string s)
Parameters
Type Name Description
System.Int32 s_size
System.String s
Returns
Type Description
System.Boolean
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Eq_S_B(Int32, String)

Declaration
protected virtual bool Eq_S_B(int s_size, string s)
Parameters
Type Name Description
System.Int32 s_size
System.String s
Returns
Type Description
System.Boolean
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Eq_V(String)

Declaration
protected virtual bool Eq_V(string s)
Parameters
Type Name Description
System.String s
Returns
Type Description
System.Boolean
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Eq_V_B(String)

Declaration
protected virtual bool Eq_V_B(string s)
Parameters
Type Name Description
System.String s
Returns
Type Description
System.Boolean
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FindAmong(Among[], Int32)

Declaration
protected virtual int FindAmong(Among[] v, int v_size)
Parameters
Type Name Description
Among[] v
System.Int32 v_size
Returns
Type Description
System.Int32
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FindAmongB(Among[], Int32)

Declaration
protected virtual int FindAmongB(Among[] v, int v_size)
Parameters
Type Name Description
Among[] v
System.Int32 v_size
Returns
Type Description
System.Int32
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InGrouping(Char[], Int32, Int32)

Declaration
protected virtual bool InGrouping(char[] s, int min, int max)
Parameters
Type Name Description
System.Char[] s
System.Int32 min
System.Int32 max
Returns
Type Description
System.Boolean
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InGroupingB(Char[], Int32, Int32)

Declaration
protected virtual bool InGroupingB(char[] s, int min, int max)
Parameters
Type Name Description
System.Char[] s
System.Int32 min
System.Int32 max
Returns
Type Description
System.Boolean
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InRange(Int32, Int32)

Declaration
protected virtual bool InRange(int min, int max)
Parameters
Type Name Description
System.Int32 min
System.Int32 max
Returns
Type Description
System.Boolean
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InRangeB(Int32, Int32)

Declaration
protected virtual bool InRangeB(int min, int max)
Parameters
Type Name Description
System.Int32 min
System.Int32 max
Returns
Type Description
System.Boolean
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Insert(Int32, Int32, String)

Declaration
protected virtual void Insert(int c_bra, int c_ket, string s)
Parameters
Type Name Description
System.Int32 c_bra
System.Int32 c_ket
System.String s
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OutGrouping(Char[], Int32, Int32)

Declaration
protected virtual bool OutGrouping(char[] s, int min, int max)
Parameters
Type Name Description
System.Char[] s
System.Int32 min
System.Int32 max
Returns
Type Description
System.Boolean
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OutGroupingB(Char[], Int32, Int32)

Declaration
protected virtual bool OutGroupingB(char[] s, int min, int max)
Parameters
Type Name Description
System.Char[] s
System.Int32 min
System.Int32 max
Returns
Type Description
System.Boolean
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OutRange(Int32, Int32)

Declaration
protected virtual bool OutRange(int min, int max)
Parameters
Type Name Description
System.Int32 min
System.Int32 max
Returns
Type Description
System.Boolean
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OutRangeB(Int32, Int32)

Declaration
protected virtual bool OutRangeB(int min, int max)
Parameters
Type Name Description
System.Int32 min
System.Int32 max
Returns
Type Description
System.Boolean
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ReplaceS(Int32, Int32, String)

to replace chars between c_bra and c_ket in current by the chars in s.

Declaration
protected virtual int ReplaceS(int c_bra, int c_ket, string s)
Parameters
Type Name Description
System.Int32 c_bra
System.Int32 c_ket
System.String s
Returns
Type Description
System.Int32
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SetCurrent(Char[], Int32)

Set the current string.

Declaration
public virtual void SetCurrent(char[] text, int length)
Parameters
Type Name Description
System.Char[] text

character array containing input
System.Int32 length

valid length of text.
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SetCurrent(String)

Set the current string.

Declaration
public virtual void SetCurrent(string value)
Parameters
Type Name Description
System.String value
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SliceCheck()

Declaration
protected virtual void SliceCheck()
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SliceDel()

Declaration
protected virtual void SliceDel()
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SliceFrom(String)

Declaration
protected virtual void SliceFrom(string s)
Parameters
Type Name Description
System.String s
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SliceTo(StringBuilder)

Copy the slice into the supplied

Declaration
protected virtual StringBuilder SliceTo(StringBuilder s)
Parameters
Type Name Description
StringBuilder s
Returns
Type Description
StringBuilder
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Stem()

Declaration
public abstract bool Stem()
Returns
Type Description
System.Boolean