如何判断GeoTools 的Geometry类型

最新推荐文章于 2024-07-03 18:08:27 发布

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本文介绍如何使用GeoTools中的Geometries枚举来简化对不同几何类型的判断过程，如Polygon、LineString和Point等，通过示例代码展示了如何避免冗长的类型检查，提高代码的可读性和维护性。

代码如下，截取自GeoTools文档

public enum Geometries
extends Enum<Geometries>
Constants to identify JTS geometry types, reducing the need for boiler-plate code such as this...
 if (Polygon.class.isAssignableFrom(myObject.getClass()) ||
         MultiPolygon.class.isAssignableFrom(myObject.getClass())) {
     // do polygon thing
     ...
 } else if (LineString.class.isAssignableFrom(myObject.getClass()) ||
         MultiLineString.class.isAssignableFrom(myObject.getClass())) {
     // do line thing
     ....
 } else {
     // do point thing
     ....
 }
 Instead you can do this...
 Geometries geomType = Geometries.get(myObject);
 switch (geomType) {
     case POLYGON:
     case MULTIPOLYGON:
         // do polygon thing
         break;
     case LINESTRING:
     case MULTILINESTRING:
         // do line thing
         break;
     case POINT:
     case MULTIPOINT:
         // do point thing
         break;
     default:
         // e.g. unspecified Geometry, GeometryCollection
         break;
 }
 You can also work with Class objects...
 Class aClas = ...
 Geometries type = Geometries.getForBinding( aClass );