madrob commented on a change in pull request #1042: LUCENE-9068: Build
FuzzyQuery automata up-front
URL: https://github.com/apache/lucene-solr/pull/1042#discussion_r362645275
##########
File path: lucene/core/src/java/org/apache/lucene/search/FuzzyTermsEnum.java
##########
@@ -91,58 +105,49 @@
*
* @param terms Delivers terms.
* @param atts {@link AttributeSource} created by the rewrite method of
{@link MultiTermQuery}
- * thats contains information about competitive boosts during rewrite. It is
also used
- * to cache DFAs between segment transitions.
+ * that contains information about competitive boosts during
rewrite
* @param term Pattern term.
* @param maxEdits Maximum edit distance.
- * @param prefixLength Length of required common prefix. Default value is 0.
+ * @param automata An array of levenshtein automata to match against terms,
+ * see {@link #buildAutomata(String, int, boolean, int)}
* @throws IOException if there is a low-level IO error
*/
public FuzzyTermsEnum(Terms terms, AttributeSource atts, Term term,
- final int maxEdits, final int prefixLength, boolean transpositions)
throws IOException {
- if (maxEdits < 0 || maxEdits >
LevenshteinAutomata.MAXIMUM_SUPPORTED_DISTANCE) {
- throw new IllegalArgumentException("max edits must be 0.." +
LevenshteinAutomata.MAXIMUM_SUPPORTED_DISTANCE + ", inclusive; got: " +
maxEdits);
- }
- if (prefixLength < 0) {
- throw new IllegalArgumentException("prefixLength cannot be less than 0");
- }
+ final int maxEdits, CompiledAutomaton[] automata) throws IOException {
+
this.maxEdits = maxEdits;
this.terms = terms;
this.term = term;
+ this.atts = atts;
// convert the string into a utf32 int[] representation for fast
comparisons
- this.termText = stringToUTF32(term.text());
+ int[] termText = stringToUTF32(term.text());
Review comment:
This seems like a potentially expensive conversion to have to do just to get
the length when we already have the automata (and we might have already done it
once, if this constructor was called via the other one on L96.)
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