org.apache.lucene.search.suggest

Class FileDictionary

java.lang.Object

org.apache.lucene.search.suggest.FileDictionary

All Implemented Interfaces:

Dictionary

public class FileDictionary
extends Object
implements Dictionary

Dictionary represented by a text file.

Format allowed: 1 entry per line:
An entry can be:

• suggestion
• suggestion fieldDelimiter weight
• suggestion fieldDelimiter weight fieldDelimiter payload

where the default fieldDelimiter is "\t"

NOTE:

• In order to have payload enabled, the first entry has to have a payload
• If the weight for an entry is not specified then a value of 1 is used
• A payload cannot be specified without having the weight specified for an entry
• If the payload for an entry is not specified (assuming payload is enabled) then an empty payload is returned
• An entry cannot have more than two fieldDelimiter

Example:
word1 word2 TAB 100 TAB payload1
word3 TAB 101
word4 word3 TAB 102

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_FIELD_DELIMITER Tab-delimited fields are most common thus the default, but one can override this via the constructor

Constructor Summary

Constructors

Constructor and Description
FileDictionary(InputStream dictFile) Creates a dictionary based on an inputstream.
FileDictionary(InputStream dictFile, String fieldDelimiter) Creates a dictionary based on an inputstream.
FileDictionary(Reader reader) Creates a dictionary based on a reader.
FileDictionary(Reader reader, String fieldDelimiter) Creates a dictionary based on a reader.

Method Summary

Modifier and Type	Method and Description
InputIterator	getEntryIterator() Returns an iterator over all the entries

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_FIELD_DELIMITER

public static final String DEFAULT_FIELD_DELIMITER

Tab-delimited fields are most common thus the default, but one can override this via the constructor

See Also:

Constant Field Values

Constructor Detail

FileDictionary

public FileDictionary(InputStream dictFile)

Creates a dictionary based on an inputstream. Using DEFAULT_FIELD_DELIMITER as the field separator in a line.

NOTE: content is treated as UTF-8

FileDictionary

public FileDictionary(Reader reader)

Creates a dictionary based on a reader. Using DEFAULT_FIELD_DELIMITER as the field separator in a line.

FileDictionary

public FileDictionary(Reader reader,
                      String fieldDelimiter)

Creates a dictionary based on a reader. Using fieldDelimiter to separate out the fields in a line.

FileDictionary

public FileDictionary(InputStream dictFile,
                      String fieldDelimiter)

Creates a dictionary based on an inputstream. Using fieldDelimiter to separate out the fields in a line.

NOTE: content is treated as UTF-8

Method Detail

getEntryIterator

public InputIterator getEntryIterator()

Description copied from interface: Dictionary

Returns an iterator over all the entries

Specified by:

getEntryIterator in interface Dictionary

Returns:

Iterator