Add regex operator to Atlas Search

driver-core/src/main/com/mongodb/client/model/search/RegexSearchOperator.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2008-present MongoDB, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.mongodb.client.model.search;
+
+import com.mongodb.annotations.Beta;
+import com.mongodb.annotations.Reason;
+import com.mongodb.annotations.Sealed;
+
+/**
+ * @see SearchOperator#regex(SearchPath, String)
+ * @see SearchOperator#regex(Iterable, Iterable)
+ * @since 5.3
+ */
+
+@Sealed
+@Beta(Reason.CLIENT)
+public interface RegexSearchOperator extends SearchOperator {
+    @Override
+    RegexSearchOperator score(SearchScore modifier);
+}

driver-core/src/main/com/mongodb/client/model/search/SearchConstructibleBsonElement.java

@@ -31,7 +31,7 @@
 final class SearchConstructibleBsonElement extends AbstractConstructibleBsonElement<SearchConstructibleBsonElement> implements
         MustCompoundSearchOperator, MustNotCompoundSearchOperator, ShouldCompoundSearchOperator, FilterCompoundSearchOperator,
         ExistsSearchOperator, TextSearchOperator, AutocompleteSearchOperator,
-        NumberNearSearchOperator, DateNearSearchOperator, GeoNearSearchOperator,
+        NumberNearSearchOperator, DateNearSearchOperator, GeoNearSearchOperator, RegexSearchOperator,
         ValueBoostSearchScore, PathBoostSearchScore, ConstantSearchScore, FunctionSearchScore,
         GaussSearchScoreExpression, PathSearchScoreExpression,
         FacetSearchCollector,

driver-core/src/main/com/mongodb/client/model/search/SearchOperator.java

@@ -322,6 +322,36 @@ static PhraseSearchOperator phrase(final Iterable<? extends SearchPath> paths, f
                 .append("query", queryIterator.hasNext() ? queries : firstQuery));
     }
 
+    /**
+     * Returns a {@link SearchOperator} that performs a search using a regular expression.
+     *
+     * @param path The field to be searched.
+     * @param query The string to search for.
+     * @return The requested {@link SearchOperator}.
+     * @mongodb.atlas.manual atlas-search/regex/ regex operator
+     */
+    static RegexSearchOperator regex(final SearchPath path, final String query) {
+        return regex(singleton(notNull("path", path)), singleton(notNull("query", query)));
+    }
+
+    /**
+     * Returns a {@link SearchOperator} that performs a search using a regular expression.
+     *
+     * @param paths The non-empty fields to be searched.
+     * @param queries The non-empty strings to search for.
+     * @return The requested {@link SearchOperator}.
+     * @mongodb.atlas.manual atlas-search/regex/ regex operator
+     */
+    static RegexSearchOperator regex(final Iterable<? extends SearchPath> paths, final Iterable<String> queries) {
+        Iterator<? extends SearchPath> pathIterator = notNull("paths", paths).iterator();
+        isTrueArgument("paths must not be empty", pathIterator.hasNext());
+        Iterator<String> queryIterator = notNull("queries", queries).iterator();
+        isTrueArgument("queries must not be empty", queryIterator.hasNext());
+        String firstQuery = queryIterator.next();
+        return new SearchConstructibleBsonElement("regex", new Document("path", combineToBsonValue(pathIterator, false))
+                .append("query", queryIterator.hasNext() ? queries : firstQuery));
+    }
+
     /**
      * Creates a {@link SearchOperator} from a {@link Bson} in situations when there is no builder method that better satisfies your needs.
      * This method cannot be used to validate the syntax.

driver-core/src/test/functional/com/mongodb/client/model/search/AggregatesSearchIntegrationTest.java

@@ -82,6 +82,7 @@
 import static com.mongodb.client.model.search.SearchOperator.exists;
 import static com.mongodb.client.model.search.SearchOperator.near;
 import static com.mongodb.client.model.search.SearchOperator.numberRange;
+import static com.mongodb.client.model.search.SearchOperator.regex;
 import static com.mongodb.client.model.search.SearchOperator.phrase;
 import static com.mongodb.client.model.search.SearchOperator.text;
 import static com.mongodb.client.model.search.SearchOptions.searchOptions;
@@ -610,7 +611,8 @@ private static Stream<Arguments> searchAndSearchMetaArgs() {
                                                 .lte(Instant.ofEpochMilli(1)),
                                         near(0, 1.5, fieldPath("fieldName7"), fieldPath("fieldName8")),
                                         near(Instant.ofEpochMilli(1), Duration.ofMillis(3), fieldPath("fieldName9")),
-                                        phrase(fieldPath("fieldName10"), "term6")
+                                        phrase(fieldPath("fieldName10"), "term6"),
+                                        regex(fieldPath("fieldName11"), "term7")
                                 ))
                                 .minimumShouldMatch(1)
                                 .mustNot(singleton(

driver-core/src/test/unit/com/mongodb/client/model/search/SearchOperatorTest.java

@@ -649,6 +649,58 @@ void phrase() {
         );
     }
 
+    @Test
+    void regex() {
+        assertAll(
+                () -> assertThrows(IllegalArgumentException.class, () ->
+                        // queries must not be empty
+                        SearchOperator.regex(singleton(fieldPath("fieldName")), emptyList())
+                ),
+                () -> assertThrows(IllegalArgumentException.class, () ->
+                        // paths must not be empty
+                        SearchOperator.regex(emptyList(), singleton("term"))
+                ),
+                () -> assertEquals(
+                        new BsonDocument("regex",
+                                new BsonDocument("path", fieldPath("fieldName").toBsonValue())
+                                        .append("query", new BsonString("term"))
+                        ),
+                        SearchOperator.regex(
+                                        fieldPath("fieldName"),
+                                        "term")
+                                .toBsonDocument()
+                ),
+                () -> assertEquals(
+                        new BsonDocument("regex",
+                                new BsonDocument("path", fieldPath("fieldName").toBsonValue())
+                                        .append("query", new BsonString("term"))
+                        ),
+                        SearchOperator.regex(
+                                        singleton(fieldPath("fieldName")),
+                                        singleton("term"))
+                                .toBsonDocument()
+                ),
+                () -> assertEquals(
+                        new BsonDocument("regex",
+                                new BsonDocument("path", new BsonArray(asList(
+                                        fieldPath("fieldName").toBsonValue(),
+                                        wildcardPath("wildc*rd").toBsonValue())))
+                                        .append("query", new BsonArray(asList(
+                                                new BsonString("term1"),
+                                                new BsonString("term2"))))
+                        ),
+                        SearchOperator.regex(
+                                        asList(
+                                                fieldPath("fieldName"),
+                                                wildcardPath("wildc*rd")),
+                                        asList(
+                                                "term1",
+                                                "term2"))
+                                .toBsonDocument()
+                )
+        );
+    }
+
     private static SearchOperator docExamplePredefined() {
         return SearchOperator.exists(
                 fieldPath("fieldName"));

driver-scala/src/main/scala/org/mongodb/scala/model/search/SearchOperator.scala

@@ -249,6 +249,27 @@ object SearchOperator {
   def phrase(paths: Iterable[_ <: SearchPath], queries: Iterable[String]): PhraseSearchOperator =
     JSearchOperator.phrase(paths.asJava, queries.asJava)
 
+  /**
+   * Returns a `SearchOperator` that performs a search using a regular expression.
+   *
+   * @param path The field to be searched.
+   * @param query The string to search for.
+   * @return The requested `SearchOperator`.
+   * @see [[https://www.mongodb.com/docs/atlas/atlas-search/regex/ regex operator]]
+   */
+  def regex(path: SearchPath, query: String): RegexSearchOperator = JSearchOperator.regex(path, query)
+
+  /**
+   * Returns a `SearchOperator` that performs a search using a regular expression.
+   *
+   * @param paths The non-empty fields to be searched.
+   * @param queries The non-empty strings to search for.
+   * @return The requested `SearchOperator`.
+   * @see [[https://www.mongodb.com/docs/atlas/atlas-search/regex/ regex operator]]
+   */
+  def regex(paths: Iterable[_ <: SearchPath], queries: Iterable[String]): RegexSearchOperator =
+    JSearchOperator.regex(paths.asJava, queries.asJava)
+
   /**
    * Creates a `SearchOperator` from a `Bson` in situations when there is no builder method that better satisfies your needs.
    * This method cannot be used to validate the syntax.

driver-scala/src/main/scala/org/mongodb/scala/model/search/package.scala

@@ -135,6 +135,14 @@ package object search {
   @Beta(Array(Reason.CLIENT))
   type AutocompleteSearchOperator = com.mongodb.client.model.search.AutocompleteSearchOperator
 
+  /**
+   * @see `SearchOperator.regex(String, SearchPath)`
+   * @see `SearchOperator.regex(Iterable, Iterable)`
+   */
+  @Sealed
+  @Beta(Array(Reason.CLIENT))
+  type RegexSearchOperator = com.mongodb.client.model.search.RegexSearchOperator
+
   /**
    * A base for a [[NumberRangeSearchOperatorBase]] which allows creating instances of this operator.
    * This interface is a technicality and does not represent a meaningful element of the full-text search query syntax.