LUCENE-7947: Add GeoPointShape interface etc. Committed on behalf of Ignacio Vera.

lucene/spatial3d/src/java/org/apache/lucene/spatial3d/geom/GeoDegeneratePoint.java

@@ -25,7 +25,7 @@ import java.io.IOException;
  *
  * @lucene.internal
  */
-class GeoDegeneratePoint extends GeoPoint implements GeoBBox, GeoCircle {
+class GeoDegeneratePoint extends GeoPoint implements GeoPointShape {
   /** Current planet model, since we don't extend BasePlanetObject */
   protected final PlanetModel planetModel;
   /** Edge point is an area containing just this */

lucene/spatial3d/src/java/org/apache/lucene/spatial3d/geom/GeoPointShape.java

@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.lucene.spatial3d.geom;
+
+/**
+ * Interface describing a GeoPointShape shape.It may represents a degenerated
+ * bounding box or a degenerated circle, hence it extends such interfaces.
+ */
+public interface GeoPointShape extends GeoCircle, GeoBBox {
+}

lucene/spatial3d/src/java/org/apache/lucene/spatial3d/geom/GeoPointShapeFactory.java

@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.lucene.spatial3d.geom;
+
+/**
+ *  Class which constructs a GeoPointShape.
+ */
+public class GeoPointShapeFactory {
+
+  private GeoPointShapeFactory() {
+  }
+
+  /**
+   * Create a GeoPointShape with the provided information.
+   * @param planetModel the planet model
+   * @param lat the latitude
+   * @param lon the longitude
+   * @return a GeoPointShape corresponding to what was specified.
+   */
+  public static GeoPointShape makeGeoPointShape(final PlanetModel planetModel, final double lat, final double lon) {
+    return new GeoDegeneratePoint(planetModel, lat, lon);
+  }
+}