org.apache.lucene.analysis.synonym

Class SolrSynonymParser

java.lang.Object

org.apache.lucene.analysis.synonym.SynonymMap.Builder

org.apache.lucene.analysis.synonym.SynonymMap.Parser

org.apache.lucene.analysis.synonym.SolrSynonymParser

public class SolrSynonymParser
extends SynonymMap.Parser

Parser for the Solr synonyms format.

1. Blank lines and lines starting with '#' are comments.
2. Explicit mappings match any token sequence on the LHS of "=>" and replace with all alternatives on the RHS. These types of mappings ignore the expand parameter in the constructor. Example:

   i-pod, i pod => ipod

3. Equivalent synonyms may be separated with commas and give no explicit mapping. In this case the mapping behavior will be taken from the expand parameter in the constructor. This allows the same synonym file to be used in different synonym handling strategies. Example:

   ipod, i-pod, i pod

4. Multiple synonym mapping entries are merged. Example:

   foo => foo bar
   foo => baz
   
   is equivalent to
   
   foo => foo bar, baz

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	expand

Constructor Summary

Constructors

Constructor and Description
SolrSynonymParser(boolean dedup, boolean expand, Analyzer analyzer)

Method Summary

Modifier and Type	Method and Description
private void	addInternal(java.io.BufferedReader in)
void	parse(java.io.Reader in) Parse the given input, adding synonyms to the inherited SynonymMap.Builder.
private static java.lang.String[]	split(java.lang.String s, java.lang.String separator)
private java.lang.String	unescape(java.lang.String s)

Methods inherited from class org.apache.lucene.analysis.synonym.SynonymMap.Parser

analyze

Methods inherited from class org.apache.lucene.analysis.synonym.SynonymMap.Builder

add, build, join

Methods inherited from class java.lang.Object

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

Field Detail

expand

private final boolean expand

Constructor Detail

SolrSynonymParser

public SolrSynonymParser(boolean dedup,
                         boolean expand,
                         Analyzer analyzer)

Method Detail

parse

public void parse(java.io.Reader in)
           throws java.io.IOException,
                  java.text.ParseException

Description copied from class: SynonymMap.Parser

Parse the given input, adding synonyms to the inherited SynonymMap.Builder.

Specified by:

parse in class SynonymMap.Parser

Parameters:

in - The input to parse

Throws:

java.io.IOException

java.text.ParseException

addInternal

private void addInternal(java.io.BufferedReader in)
                  throws java.io.IOException

Throws:

java.io.IOException

split

private static java.lang.String[] split(java.lang.String s,
                                        java.lang.String separator)

unescape

private java.lang.String unescape(java.lang.String s)