commit | 5f0dc228bf9357e9c408432c057e27c17b2536a3 | [log] [tgz] |
---|---|---|
author | Neil Fuller <nfuller@google.com> | Wed Aug 05 21:16:01 2020 +0100 |
committer | Neil Fuller <nfuller@google.com> | Thu Aug 06 16:32:17 2020 +0100 |
tree | 8a243f8c21b4db945d51a94d7f9ee8c64d21c303 | |
parent | ddaed26f746285bdc5a87e719e73588c92fe6ed6 [diff] |
Add an Android build file/OWNERS Add an Android build file / OWNERS. Test: build Bug: 152747091 Change-Id: Ibb810fccd133bb2cdb044d8cd62c0b4a1c789740
A small package of all GeoJson POJOs (Plain Old Java Objects) for serializing and deserializing of objects via JSON Jackson Parser.
If you know what kind of object you expect from a GeoJson file you can directly read it like this:
FeatureCollection featureCollection = new ObjectMapper().readValue(inputStream, FeatureCollection.class);
If you want to read any GeoJson file read the value as GeoJsonObject and then test for the contents via instanceOf:
GeoJsonObject object = new ObjectMapper().readValue(inputStream, GeoJsonObject.class); if (object instanceof Polygon) { ... } else if (object instanceof Feature) { ... }
and so on.
Or you can use the GeoJsonObjectVisitor to visit the right method:
GeoJsonObject object = new ObjectMapper().readValue(inputStream, GeoJsonObject.class); object.accept(visitor);
Writing Json is even easier. You just have to create the GeoJson objects and pass them to the Jackson ObjectMapper.
FeatureCollection featureCollection = new FeatureCollection(); featureCollection.add(new Feature()); String json= new ObjectMapper().writeValueAsString(featureCollection);
You can find the library in the Maven Central Repository.
<dependency> <groupId>de.grundid.opendatalab</groupId> <artifactId>geojson-jackson</artifactId> <version>1.8.1</version> </dependency>