org.apache.lucene.analysis.compound

Class HyphenationCompoundWordTokenFilter

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.TokenFilter

org.apache.lucene.analysis.compound.CompoundWordTokenFilterBase

org.apache.lucene.analysis.compound.HyphenationCompoundWordTokenFilter

All Implemented Interfaces:

Closeable

public class HyphenationCompoundWordTokenFilter
extends CompoundWordTokenFilterBase

A TokenFilter that decomposes compound words found in many Germanic languages.

"Donaudampfschiff" becomes Donau, dampf, schiff so that you can find "Donaudampfschiff" even when you only enter "schiff". It uses a hyphenation grammar and a word dictionary to achieve this.

You must specify the required Version compatibility when creating CompoundWordTokenFilterBase:

• As of 3.1, CompoundWordTokenFilterBase correctly handles Unicode 4.0 supplementary characters in strings and char arrays provided as compound word dictionaries.

If you pass in a CharArraySet as dictionary, it should be case-insensitive unless it contains only lowercased entries and you have LowerCaseFilter before this filter in your analysis chain. For optional performance (as this filter does lots of lookups to the dictionary, you should use the latter analysis chain/CharArraySet). Be aware: If you supply arbitrary Sets to the ctors or String[] dictionaries, they will be automatically transformed to case-insensitive!

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.analysis.compound.CompoundWordTokenFilterBase

CompoundWordTokenFilterBase.CompoundToken

Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

AttributeSource.AttributeFactory, AttributeSource.State

Field Summary

Fields inherited from class org.apache.lucene.analysis.compound.CompoundWordTokenFilterBase

DEFAULT_MAX_SUBWORD_SIZE, DEFAULT_MIN_SUBWORD_SIZE, DEFAULT_MIN_WORD_SIZE, dictionary, maxSubwordSize, minSubwordSize, minWordSize, offsetAtt, onlyLongestMatch, termAtt, tokens

Fields inherited from class org.apache.lucene.analysis.TokenFilter

input

Constructor Summary

Constructors

Constructor and Description
HyphenationCompoundWordTokenFilter(TokenStream input, HyphenationTree hyphenator, Set<?> dictionary) Deprecated. use HyphenationCompoundWordTokenFilter(Version, TokenStream, HyphenationTree, Set) instead.
HyphenationCompoundWordTokenFilter(TokenStream input, HyphenationTree hyphenator, Set<?> dictionary, int minWordSize, int minSubwordSize, int maxSubwordSize, boolean onlyLongestMatch) Deprecated. use HyphenationCompoundWordTokenFilter(Version, TokenStream, HyphenationTree, Set, int, int, int, boolean) instead.
HyphenationCompoundWordTokenFilter(TokenStream input, HyphenationTree hyphenator, String[] dictionary) Deprecated. use HyphenationCompoundWordTokenFilter(Version, TokenStream, HyphenationTree, String[]) instead.
HyphenationCompoundWordTokenFilter(TokenStream input, HyphenationTree hyphenator, String[] dictionary, int minWordSize, int minSubwordSize, int maxSubwordSize, boolean onlyLongestMatch) Deprecated. use HyphenationCompoundWordTokenFilter(Version, TokenStream, HyphenationTree, String[], int, int, int, boolean) instead.
HyphenationCompoundWordTokenFilter(Version matchVersion, TokenStream input, HyphenationTree hyphenator) Create a HyphenationCompoundWordTokenFilter with no dictionary.
HyphenationCompoundWordTokenFilter(Version matchVersion, TokenStream input, HyphenationTree hyphenator, int minWordSize, int minSubwordSize, int maxSubwordSize) Create a HyphenationCompoundWordTokenFilter with no dictionary.
HyphenationCompoundWordTokenFilter(Version matchVersion, TokenStream input, HyphenationTree hyphenator, Set<?> dictionary) Creates a new HyphenationCompoundWordTokenFilter instance.
HyphenationCompoundWordTokenFilter(Version matchVersion, TokenStream input, HyphenationTree hyphenator, Set<?> dictionary, int minWordSize, int minSubwordSize, int maxSubwordSize, boolean onlyLongestMatch) Creates a new HyphenationCompoundWordTokenFilter instance.
HyphenationCompoundWordTokenFilter(Version matchVersion, TokenStream input, HyphenationTree hyphenator, String[] dictionary) Deprecated. Use the constructors taking Set
HyphenationCompoundWordTokenFilter(Version matchVersion, TokenStream input, HyphenationTree hyphenator, String[] dictionary, int minWordSize, int minSubwordSize, int maxSubwordSize, boolean onlyLongestMatch) Deprecated. Use the constructors taking Set

Method Summary

Methods

Modifier and Type	Method and Description
protected void	decompose() Decomposes the current CompoundWordTokenFilterBase.termAtt and places CompoundWordTokenFilterBase.CompoundToken instances in the CompoundWordTokenFilterBase.tokens list.
static HyphenationTree	getHyphenationTree(File hyphenationFile) Create a hyphenator tree
static HyphenationTree	getHyphenationTree(InputSource hyphenationSource) Create a hyphenator tree
static HyphenationTree	getHyphenationTree(Reader hyphenationReader) Deprecated. Don't use Readers with fixed charset to load XML files, unless programatically created. Use getHyphenationTree(InputSource) instead, where you can supply default charset and input stream, if you like.
static HyphenationTree	getHyphenationTree(String hyphenationFilename) Create a hyphenator tree

Methods inherited from class org.apache.lucene.analysis.compound.CompoundWordTokenFilterBase

incrementToken, makeDictionary, reset

Methods inherited from class org.apache.lucene.analysis.TokenFilter

close, end

Methods inherited from class org.apache.lucene.util.AttributeSource

addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

HyphenationCompoundWordTokenFilter

@Deprecated
public HyphenationCompoundWordTokenFilter(Version matchVersion,
                                             TokenStream input,
                                             HyphenationTree hyphenator,
                                             String[] dictionary,
                                             int minWordSize,
                                             int minSubwordSize,
                                             int maxSubwordSize,
                                             boolean onlyLongestMatch)

Deprecated. Use the constructors taking Set

Creates a new HyphenationCompoundWordTokenFilter instance.

Parameters:

matchVersion - Lucene version to enable correct Unicode 4.0 behavior in the dictionaries if Version > 3.0. See CompoundWordTokenFilterBase for details.

input - the TokenStream to process

hyphenator - the hyphenation pattern tree to use for hyphenation

dictionary - the word dictionary to match against

minWordSize - only words longer than this get processed

minSubwordSize - only subwords longer than this get to the output stream

maxSubwordSize - only subwords shorter than this get to the output stream

onlyLongestMatch - Add only the longest matching subword to the stream

HyphenationCompoundWordTokenFilter

@Deprecated
public HyphenationCompoundWordTokenFilter(Version matchVersion,
                                             TokenStream input,
                                             HyphenationTree hyphenator,
                                             String[] dictionary)

Deprecated. Use the constructors taking Set

Creates a new HyphenationCompoundWordTokenFilter instance.

Parameters:

matchVersion - Lucene version to enable correct Unicode 4.0 behavior in the dictionaries if Version > 3.0. See CompoundWordTokenFilterBase for details.

input - the TokenStream to process

hyphenator - the hyphenation pattern tree to use for hyphenation

dictionary - the word dictionary to match against

HyphenationCompoundWordTokenFilter

public HyphenationCompoundWordTokenFilter(Version matchVersion,
                                  TokenStream input,
                                  HyphenationTree hyphenator,
                                  Set<?> dictionary)

Creates a new HyphenationCompoundWordTokenFilter instance.

Parameters:

matchVersion - Lucene version to enable correct Unicode 4.0 behavior in the dictionaries if Version > 3.0. See CompoundWordTokenFilterBase for details.

input - the TokenStream to process

hyphenator - the hyphenation pattern tree to use for hyphenation

dictionary - the word dictionary to match against.

HyphenationCompoundWordTokenFilter

public HyphenationCompoundWordTokenFilter(Version matchVersion,
                                  TokenStream input,
                                  HyphenationTree hyphenator,
                                  Set<?> dictionary,
                                  int minWordSize,
                                  int minSubwordSize,
                                  int maxSubwordSize,
                                  boolean onlyLongestMatch)

Creates a new HyphenationCompoundWordTokenFilter instance.

Parameters:

matchVersion - Lucene version to enable correct Unicode 4.0 behavior in the dictionaries if Version > 3.0. See CompoundWordTokenFilterBase for details.

input - the TokenStream to process

hyphenator - the hyphenation pattern tree to use for hyphenation

dictionary - the word dictionary to match against.

minWordSize - only words longer than this get processed

minSubwordSize - only subwords longer than this get to the output stream

maxSubwordSize - only subwords shorter than this get to the output stream

onlyLongestMatch - Add only the longest matching subword to the stream

HyphenationCompoundWordTokenFilter

public HyphenationCompoundWordTokenFilter(Version matchVersion,
                                  TokenStream input,
                                  HyphenationTree hyphenator,
                                  int minWordSize,
                                  int minSubwordSize,
                                  int maxSubwordSize)

Create a HyphenationCompoundWordTokenFilter with no dictionary.

Calls HyphenationCompoundWordTokenFilter(matchVersion, input, hyphenator, null, minWordSize, minSubwordSize, maxSubwordSize

HyphenationCompoundWordTokenFilter

public HyphenationCompoundWordTokenFilter(Version matchVersion,
                                  TokenStream input,
                                  HyphenationTree hyphenator)

Create a HyphenationCompoundWordTokenFilter with no dictionary.

Calls HyphenationCompoundWordTokenFilter(matchVersion, input, hyphenator, DEFAULT_MIN_WORD_SIZE, DEFAULT_MIN_SUBWORD_SIZE, DEFAULT_MAX_SUBWORD_SIZE

HyphenationCompoundWordTokenFilter

@Deprecated
public HyphenationCompoundWordTokenFilter(TokenStream input,
                                             HyphenationTree hyphenator,
                                             String[] dictionary,
                                             int minWordSize,
                                             int minSubwordSize,
                                             int maxSubwordSize,
                                             boolean onlyLongestMatch)

Deprecated. use HyphenationCompoundWordTokenFilter(Version, TokenStream, HyphenationTree, String[], int, int, int, boolean) instead.

Creates a new HyphenationCompoundWordTokenFilter instance.

Parameters:

input - the TokenStream to process

hyphenator - the hyphenation pattern tree to use for hyphenation

dictionary - the word dictionary to match against

minWordSize - only words longer than this get processed

minSubwordSize - only subwords longer than this get to the output stream

maxSubwordSize - only subwords shorter than this get to the output stream

onlyLongestMatch - Add only the longest matching subword to the stream

HyphenationCompoundWordTokenFilter

@Deprecated
public HyphenationCompoundWordTokenFilter(TokenStream input,
                                             HyphenationTree hyphenator,
                                             String[] dictionary)

Deprecated. use HyphenationCompoundWordTokenFilter(Version, TokenStream, HyphenationTree, String[]) instead.

Creates a new HyphenationCompoundWordTokenFilter instance.

Parameters:

input - the TokenStream to process

hyphenator - the hyphenation pattern tree to use for hyphenation

dictionary - the word dictionary to match against

HyphenationCompoundWordTokenFilter

@Deprecated
public HyphenationCompoundWordTokenFilter(TokenStream input,
                                             HyphenationTree hyphenator,
                                             Set<?> dictionary)

Deprecated. use HyphenationCompoundWordTokenFilter(Version, TokenStream, HyphenationTree, Set) instead.

Creates a new HyphenationCompoundWordTokenFilter instance.

Parameters:

input - the TokenStream to process

hyphenator - the hyphenation pattern tree to use for hyphenation

dictionary - the word dictionary to match against. If this is a CharArraySet it must have set ignoreCase=false and only contain lower case strings.

HyphenationCompoundWordTokenFilter

@Deprecated
public HyphenationCompoundWordTokenFilter(TokenStream input,
                                             HyphenationTree hyphenator,
                                             Set<?> dictionary,
                                             int minWordSize,
                                             int minSubwordSize,
                                             int maxSubwordSize,
                                             boolean onlyLongestMatch)

Deprecated. use HyphenationCompoundWordTokenFilter(Version, TokenStream, HyphenationTree, Set, int, int, int, boolean) instead.

Creates a new HyphenationCompoundWordTokenFilter instance.

Parameters:

input - the TokenStream to process

hyphenator - the hyphenation pattern tree to use for hyphenation

dictionary - the word dictionary to match against. If this is a CharArraySet it must have set ignoreCase=false and only contain lower case strings.

minWordSize - only words longer than this get processed

minSubwordSize - only subwords longer than this get to the output stream

maxSubwordSize - only subwords shorter than this get to the output stream

onlyLongestMatch - Add only the longest matching subword to the stream

Method Detail

getHyphenationTree

public static HyphenationTree getHyphenationTree(String hyphenationFilename)
                                          throws Exception

Create a hyphenator tree

Parameters:

hyphenationFilename - the filename of the XML grammar to load

Returns:

An object representing the hyphenation patterns

Throws:

Exception

getHyphenationTree

public static HyphenationTree getHyphenationTree(File hyphenationFile)
                                          throws Exception

Create a hyphenator tree

Parameters:

hyphenationFile - the file of the XML grammar to load

Returns:

An object representing the hyphenation patterns

Throws:

Exception

getHyphenationTree

@Deprecated
public static HyphenationTree getHyphenationTree(Reader hyphenationReader)
                                          throws Exception

Deprecated. Don't use Readers with fixed charset to load XML files, unless programatically created. Use getHyphenationTree(InputSource) instead, where you can supply default charset and input stream, if you like.

Create a hyphenator tree

Parameters:

hyphenationReader - the reader of the XML grammar to load from

Returns:

An object representing the hyphenation patterns

Throws:

Exception

getHyphenationTree

public static HyphenationTree getHyphenationTree(InputSource hyphenationSource)
                                          throws Exception

Create a hyphenator tree

Parameters:

hyphenationSource - the InputSource pointing to the XML grammar

Returns:

An object representing the hyphenation patterns

Throws:

Exception

decompose

protected void decompose()

Description copied from class: CompoundWordTokenFilterBase

Decomposes the current CompoundWordTokenFilterBase.termAtt and places CompoundWordTokenFilterBase.CompoundToken instances in the CompoundWordTokenFilterBase.tokens list. The original token may not be placed in the list, as it is automatically passed through this filter.

Specified by:

decompose in class CompoundWordTokenFilterBase