Class CJKTokenizer

CJKTokenizer is designed for Chinese, Japanese, and Korean languages.


The tokens returned are every two adjacent characters with overlap match.

Example: "java C1C2C3C4" will be segmented to: "java" "C1C2" "C2C3" "C3C4".

Additionally, the following is applied to Latin text (such as English):
  • Text is converted to lowercase.
  • Numeric digits, '+', '#', and '_' are tokenized as letters.
  • Full-width forms are converted to half-width forms.
For more info on Asian language (Chinese, Japanese, and Korean) text segmentation: please search google

Inheritance
System.Object
Lucene.Net.Util.AttributeSource
Lucene.Net.Analysis.TokenStream
Lucene.Net.Analysis.Tokenizer
CJKTokenizer
Implements
System.IDisposable
Inherited Members
Lucene.Net.Analysis.Tokenizer.m_input
Lucene.Net.Analysis.TokenStream.Dispose()
Lucene.Net.Util.AttributeSource.GetAttributeFactory()
Lucene.Net.Util.AttributeSource.GetAttributeClassesEnumerator()
Lucene.Net.Util.AttributeSource.GetAttributeImplsEnumerator()
Lucene.Net.Util.AttributeSource.AddAttributeImpl(Lucene.Net.Util.Attribute)
Lucene.Net.Util.AttributeSource.AddAttribute<T>()
Lucene.Net.Util.AttributeSource.HasAttributes
Lucene.Net.Util.AttributeSource.HasAttribute<T>()
Lucene.Net.Util.AttributeSource.GetAttribute<T>()
Lucene.Net.Util.AttributeSource.ClearAttributes()
Lucene.Net.Util.AttributeSource.CaptureState()
Lucene.Net.Util.AttributeSource.RestoreState(Lucene.Net.Util.AttributeSource.State)
Lucene.Net.Util.AttributeSource.GetHashCode()
Lucene.Net.Util.AttributeSource.ReflectWith(Lucene.Net.Util.IAttributeReflector)
Lucene.Net.Util.AttributeSource.CloneAttributes()
Lucene.Net.Util.AttributeSource.CopyTo(Lucene.Net.Util.AttributeSource)
Lucene.Net.Util.AttributeSource.ToString()
System.Object.Equals(System.Object, System.Object)
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: Lucene.Net.Analysis.Cjk
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
[Obsolete("Use StandardTokenizer, CJKWidthFilter, CJKBigramFilter, and LowerCaseFilter instead.")]
public sealed class CJKTokenizer : Tokenizer, IDisposable

Constructors

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CJKTokenizer(AttributeSource.AttributeFactory, TextReader)

Declaration
public CJKTokenizer(AttributeSource.AttributeFactory factory, TextReader in)
Parameters
Type Name Description
Lucene.Net.Util.AttributeSource.AttributeFactory factory
System.IO.TextReader in
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CJKTokenizer(TextReader)

Construct a token stream processing the given input.

Declaration
public CJKTokenizer(TextReader in)
Parameters
Type Name Description
System.IO.TextReader in

I/O reader

Methods

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End()

Declaration
public override sealed void End()
Overrides
Lucene.Net.Analysis.TokenStream.End()
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IncrementToken()

Returns true for the next token in the stream, or false at EOS. See http://java.sun.com/j2se/1.3/docs/api/java/lang/Character.UnicodeBlock.html for detail.

Declaration
public override bool IncrementToken()
Returns
Type Description
System.Boolean

false for end of stream, true otherwise
Overrides
Lucene.Net.Analysis.TokenStream.IncrementToken()
Exceptions
Type Condition
System.IO.IOException

when read error happened in the InputStream
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Reset()

Declaration
public override void Reset()
Overrides
Lucene.Net.Analysis.Tokenizer.Reset()

Implements

System.IDisposable