/*
    * Copyright 2022 the original author or authors.
    *
    * 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 org.bremersee.geojson.converter.deserialization;
  
  import static java.util.Objects.isNull;
  
  import java.io.Serial;
  import java.io.Serializable;
  import java.util.List;
  import org.locationtech.jts.geom.Coordinate;
  import org.locationtech.jts.geom.CoordinateSequence;
  import org.locationtech.jts.geom.impl.CoordinateArraySequence;
  
  /**
   * The object to coordinate sequence converter.
   *
   * @author Christian Bremer
   */
  class ObjectToCoordinateSequenceConverter implements Serializable {
  
    @Serial
    private static final long serialVersionUID = 1L;
  
    private final ObjectToCoordinateConverter coordinateConverter;
  
    /**
     * Instantiates a new Object to coordinate sequence converter.
     *
     * @param coordinateConverter the coordinate converter
     */
    ObjectToCoordinateSequenceConverter(ObjectToCoordinateConverter coordinateConverter) {
      if (isNull(coordinateConverter)) {
        throw new IllegalArgumentException("Coordinate converter must be present.");
      }
      this.coordinateConverter = coordinateConverter;
    }
  
    /**
     * Convert coordinate sequence.
     *
     * @param source the source
     * @return the coordinate sequence
     */
    CoordinateSequence convert(Object source) {
      Coordinate[] coords;
      if (isNull(source)) {
        coords = new Coordinate[0];
      } else {
        //noinspection unchecked
        coords = ((List<Object>) source).stream()
            .map(coordinateConverter::convert)
            .toArray(Coordinate[]::new);
      }
      return new CoordinateArraySequence(coords);
    }
  
  }