public final class WikipediaTokenizer extends Tokenizer
AttributeSource.AttributeFactory, AttributeSource.State
Modifier and Type | Field and Description |
---|---|
static int |
ACRONYM_ID |
static int |
ALPHANUM_ID |
static int |
APOSTROPHE_ID |
static String |
BOLD |
static int |
BOLD_ID |
static String |
BOLD_ITALICS |
static int |
BOLD_ITALICS_ID |
static int |
BOTH
Output the both the untokenized token and the splits
|
static String |
CATEGORY |
static int |
CATEGORY_ID |
static String |
CITATION |
static int |
CITATION_ID |
static int |
CJ_ID |
static int |
COMPANY_ID |
static int |
EMAIL_ID |
static String |
EXTERNAL_LINK |
static int |
EXTERNAL_LINK_ID |
static String |
EXTERNAL_LINK_URL |
static int |
EXTERNAL_LINK_URL_ID |
static String |
HEADING |
static int |
HEADING_ID |
static int |
HOST_ID |
static String |
INTERNAL_LINK |
static int |
INTERNAL_LINK_ID |
static String |
ITALICS |
static int |
ITALICS_ID |
static int |
NUM_ID |
static String |
SUB_HEADING |
static int |
SUB_HEADING_ID |
static String[] |
TOKEN_TYPES
String token types that correspond to token type int constants
|
static int |
TOKENS_ONLY
Only output tokens
|
static int |
UNTOKENIZED_ONLY
Only output untokenized tokens, which are tokens that would normally be split into several tokens
|
static int |
UNTOKENIZED_TOKEN_FLAG
This flag is used to indicate that the produced "Token" would, if
TOKENS_ONLY was used, produce multiple tokens. |
Constructor and Description |
---|
WikipediaTokenizer(AttributeSource.AttributeFactory factory,
Reader input,
int tokenOutput,
Set<String> untokenizedTypes)
Creates a new instance of the
WikipediaTokenizer . |
WikipediaTokenizer(Reader input)
Creates a new instance of the
WikipediaTokenizer . |
WikipediaTokenizer(Reader input,
int tokenOutput,
Set<String> untokenizedTypes)
Creates a new instance of the
WikipediaTokenizer . |
Modifier and Type | Method and Description |
---|---|
void |
close()
Releases resources associated with this stream.
|
void |
end()
This method is called by the consumer after the last token has been
consumed, after
TokenStream.incrementToken() returned false
(using the new TokenStream API). |
boolean |
incrementToken()
Consumers (i.e.,
IndexWriter ) use this method to advance the stream to
the next token. |
void |
reset()
This method is called by a consumer before it begins consumption using
TokenStream.incrementToken() . |
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString
public static final String INTERNAL_LINK
public static final String EXTERNAL_LINK
public static final String EXTERNAL_LINK_URL
public static final String CITATION
public static final String CATEGORY
public static final String BOLD
public static final String ITALICS
public static final String BOLD_ITALICS
public static final String HEADING
public static final String SUB_HEADING
public static final int ALPHANUM_ID
public static final int APOSTROPHE_ID
public static final int ACRONYM_ID
public static final int COMPANY_ID
public static final int EMAIL_ID
public static final int HOST_ID
public static final int NUM_ID
public static final int CJ_ID
public static final int INTERNAL_LINK_ID
public static final int EXTERNAL_LINK_ID
public static final int CITATION_ID
public static final int CATEGORY_ID
public static final int BOLD_ID
public static final int ITALICS_ID
public static final int BOLD_ITALICS_ID
public static final int HEADING_ID
public static final int SUB_HEADING_ID
public static final int EXTERNAL_LINK_URL_ID
public static final String[] TOKEN_TYPES
public static final int TOKENS_ONLY
public static final int UNTOKENIZED_ONLY
public static final int BOTH
public static final int UNTOKENIZED_TOKEN_FLAG
TOKENS_ONLY
was used, produce multiple tokens.public WikipediaTokenizer(Reader input)
WikipediaTokenizer
. Attaches the
input
to a newly created JFlex scanner.input
- The Input Readerpublic WikipediaTokenizer(Reader input, int tokenOutput, Set<String> untokenizedTypes)
WikipediaTokenizer
. Attaches the
input
to a the newly created JFlex scanner.input
- The inputtokenOutput
- One of TOKENS_ONLY
, UNTOKENIZED_ONLY
, BOTH
public WikipediaTokenizer(AttributeSource.AttributeFactory factory, Reader input, int tokenOutput, Set<String> untokenizedTypes)
WikipediaTokenizer
. Attaches the
input
to a the newly created JFlex scanner. Uses the given AttributeSource.AttributeFactory
.input
- The inputtokenOutput
- One of TOKENS_ONLY
, UNTOKENIZED_ONLY
, BOTH
public final boolean incrementToken() throws IOException
TokenStream
IndexWriter
) use this method to advance the stream to
the next token. Implementing classes must implement this method and update
the appropriate AttributeImpl
s with the attributes of the next
token.
The producer must make no assumptions about the attributes after the method
has been returned: the caller may arbitrarily change it. If the producer
needs to preserve the state for subsequent calls, it can use
AttributeSource.captureState()
to create a copy of the current attribute state.
This method is called for every token of a document, so an efficient
implementation is crucial for good performance. To avoid calls to
AttributeSource.addAttribute(Class)
and AttributeSource.getAttribute(Class)
,
references to all AttributeImpl
s that this stream uses should be
retrieved during instantiation.
To ensure that filters and consumers know which attributes are available,
the attributes must be added during instantiation. Filters and consumers
are not required to check for availability of attributes in
TokenStream.incrementToken()
.
incrementToken
in class TokenStream
IOException
public void close() throws IOException
Tokenizer
If you override this method, always call super.close()
, otherwise
some internal state will not be correctly reset (e.g., Tokenizer
will
throw IllegalStateException
on reuse).
NOTE:
The default implementation closes the input Reader, so
be sure to call super.close()
when overriding this method.
close
in interface Closeable
close
in interface AutoCloseable
close
in class Tokenizer
IOException
public void reset() throws IOException
TokenStream
TokenStream.incrementToken()
.
Resets this stream to a clean state. Stateful implementations must implement this method so that they can be reused, just as if they had been created fresh.
If you override this method, always call super.reset()
, otherwise
some internal state will not be correctly reset (e.g., Tokenizer
will
throw IllegalStateException
on further usage).
reset
in class Tokenizer
IOException
public void end() throws IOException
TokenStream
TokenStream.incrementToken()
returned false
(using the new TokenStream
API). Streams implementing the old API
should upgrade to use this feature.
This method can be used to perform any end-of-stream operations, such as
setting the final offset of a stream. The final offset of a stream might
differ from the offset of the last token eg in case one or more whitespaces
followed after the last token, but a WhitespaceTokenizer was used.
Additionally any skipped positions (such as those removed by a stopfilter) can be applied to the position increment, or any adjustment of other attributes where the end-of-stream value may be important.
If you override this method, always call super.end()
.
end
in class TokenStream
IOException
- If an I/O error occursCopyright © 2010 - 2020 Adobe. All Rights Reserved