com.google.gerrit.server.query.change.IsSubmittablePredicate Maven / Gradle / Ivy
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//
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//
// http://www.apache.org/licenses/LICENSE-2.0
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package com.google.gerrit.server.query.change;
import com.google.gerrit.index.query.NotPredicate;
import com.google.gerrit.index.query.Predicate;
import com.google.gerrit.server.index.change.ChangeField;
public class IsSubmittablePredicate extends BooleanPredicate {
public IsSubmittablePredicate() {
super(ChangeField.IS_SUBMITTABLE);
}
/**
* Rewrite the is:submittable predicate.
*
* If we run a query with "is:submittable OR -is:submittable" the result should match all
* changes. In Lucene, we keep separate sub-indexes for open and closed changes. The Lucene
* backend inspects the input predicate and depending on all its child predicates decides if the
* query should run against the open sub-index, closed sub-index or both.
*
*
The "is:submittable" operator is implemented as:
*
*
issubmittable:1
*
*
But we want to exclude closed changes from being matched by this query. For the normal case,
* we rewrite the query as:
*
*
issubmittable:1 AND status:new
*
*
Hence Lucene will match the query against the open sub-index. For the negated case (i.e.
* "-is:submittable"), we cannot just negate the previous query because it would result in:
*
*
-(issubmittable:1 AND status:new)
*
*
Lucene will conclude that it should look for changes that are not new and hence will
* run the query against the closed sub-index, not matching with changes that are open but not
* submittable. For this case, we need to rewrite the query to match with closed changes or
* changes that are not submittable.
*/
public static Predicate rewrite(Predicate in) {
if (in instanceof IsSubmittablePredicate) {
return Predicate.and(
new BooleanPredicate(ChangeField.IS_SUBMITTABLE), ChangeStatusPredicate.open());
}
if (in instanceof NotPredicate && in.getChild(0) instanceof IsSubmittablePredicate) {
return Predicate.or(
Predicate.not(new BooleanPredicate(ChangeField.IS_SUBMITTABLE)),
ChangeStatusPredicate.closed());
}
return in;
}
}