commit | f640223f108eddfb801b34a82652b825418c779f | [log] [tgz] |
---|---|---|
author | zp <zp@zp-lsts> | Sat Mar 28 09:48:34 2020 +0000 |
committer | zp <zp@zp-lsts> | Sat Mar 28 09:48:34 2020 +0000 |
tree | ca980ca1dac695d5205b18d36184271e66108b96 | |
parent | e7c562e6deaae534797a34e9d63cd898ffd87a99 [diff] |
GeoJsonObject: Ignore unknown properties.
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>