GeometryFactoryIndexedPointInAreaLocator.java

package com.revolsys.geometry.algorithm;

import com.revolsys.collection.map.WeakKeyValueMap;
import com.revolsys.geometry.algorithm.locate.IndexedPointInAreaLocator;
import com.revolsys.geometry.model.Geometry;
import com.revolsys.geometry.model.GeometryFactory;
import com.revolsys.geometry.model.Location;
import com.revolsys.util.Property;

public class GeometryFactoryIndexedPointInAreaLocator extends IndexedPointInAreaLocator {

  private static final WeakKeyValueMap<Geometry, GeometryFactoryIndexedPointInAreaLocator> CACHE = new WeakKeyValueMap<>();

  public static GeometryFactoryIndexedPointInAreaLocator get(final Geometry geometry) {
    if (Property.hasValue(geometry)) {
      GeometryFactoryIndexedPointInAreaLocator locator = CACHE.get(geometry);
      if (locator == null) {
        locator = new GeometryFactoryIndexedPointInAreaLocator(geometry);
        CACHE.put(geometry, locator);
      }
      return locator;
    } else {
      return null;
    }
  }

  public GeometryFactoryIndexedPointInAreaLocator(final Geometry geometry) {
    super(geometry);
  }

  @Override
  public Location locate(final double x, final double y) {
    final GeometryFactory geometryFactory = getGeometryFactory();
    final double resolutionY = geometryFactory.getResolutionY();
    final double minY = y - resolutionY;
    final double maxY = y + resolutionY;
    final PointInArea visitor = new PointInArea(geometryFactory, x, y);
    getIndex().query(minY, maxY, visitor);

    return visitor.getLocation();
  }

}