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LUCENE-7295: TermAutomatonQuery.hashCode calculates Automaton.toDot().hash.

This commit is contained in:
Dawid Weiss 2016-05-24 21:25:05 +02:00
parent dfa3d6c9d9
commit 6e8ca1a094
2 changed files with 8 additions and 8 deletions
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3
lucene/CHANGES.txt
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@ -136,6 +136,9 @@ Documentation
Other
* LUCENE-7295: TermAutomatonQuery.hashCode calculates Automaton.toDot().hash,
equivalence relationship replaced with object identity. (Dawid Weiss)
* LUCENE-7277: Make Query.hashCode and Query.equals abstract. (Paul Elschot,
Dawid Weiss)

13
lucene/sandbox/src/java/org/apache/lucene/search/TermAutomatonQuery.java
View File

@ -245,19 +245,18 @@ public class TermAutomatonQuery extends Query {
}
private boolean equalsTo(TermAutomatonQuery other) {
// NOTE: not quite correct, because if terms were added in different
// order in each query but the language is the same, we return false:
return checkFinished(this) &&
checkFinished(other) &&
termToID.equals(other.termToID) &&
Operations.sameLanguage(det, other.det);
other == this;
}
@Override
public int hashCode() {
checkFinished(this);
// TODO: LUCENE-7295: Automaton.toDot() is very costly!
return classHash() ^ termToID.hashCode() + det.toDot().hashCode();
// LUCENE-7295: this used to be very awkward toDot() call; it is safer to assume
// that no two instances are equivalent instead (until somebody finds a better way to check
// on automaton equivalence quickly).
return System.identityHashCode(this);
}
/** Returns the dot (graphviz) representation of this automaton.
@ -328,7 +327,6 @@ public class TermAutomatonQuery extends Query {
}
final class TermAutomatonWeight extends Weight {
private final IndexSearcher searcher;
final Automaton automaton;
private final Map<Integer,TermContext> termStates;
private final Similarity.SimWeight stats;
@ -337,7 +335,6 @@ public class TermAutomatonQuery extends Query {
public TermAutomatonWeight(Automaton automaton, IndexSearcher searcher, Map<Integer,TermContext> termStates) throws IOException {
super(TermAutomatonQuery.this);
this.automaton = automaton;
this.searcher = searcher;
this.termStates = termStates;
this.similarity = searcher.getSimilarity(true);
List<TermStatistics> allTermStats = new ArrayList<>();