content: /*
   * 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.calcite.runtime;
  
  import org.locationtech.jts.geom.Coordinate;
  import org.locationtech.jts.geom.CoordinateSequence;
  import org.locationtech.jts.geom.Geometry;
  import org.locationtech.jts.geom.impl.CoordinateArraySequence;
  import org.locationtech.jts.geom.util.GeometryTransformer;
  
  /**
   * Operation that adds a z value to a geometry.
   */
  public class AddZTransformer extends GeometryTransformer {
  
    private final double zToAdd;
  
    public AddZTransformer(double zToAdd) {
      this.zToAdd = zToAdd;
    }
  
    @Override protected CoordinateSequence transformCoordinates(
        CoordinateSequence coordinates, Geometry parent) {
      Coordinate[] newCoordinates = new Coordinate[coordinates.size()];
      for (int i = 0; i < coordinates.size(); i++) {
        Coordinate current = coordinates.getCoordinate(i);
        if (!Double.isNaN(current.z)) {
          newCoordinates[i] = new Coordinate(current.x, current.y, current.z + zToAdd);
        }
      }
      return new CoordinateArraySequence(newCoordinates);
    }
  
  }
  