commit | 7b780aae2e9a39a12a8fa43ebee113d046541b1a | [log] [tgz] |
---|---|---|
author | Adrian Stabiszewski <as@grundid.de> | Tue Apr 25 19:02:11 2017 +0200 |
committer | Adrian Stabiszewski <as@grundid.de> | Tue Apr 25 19:02:11 2017 +0200 |
tree | b7b49b79629b3f31e5f9e81eaaa91796276c3211 | |
parent | e53689bf64b227e8ea7d6b67a0d8f78c124d1732 [diff] |
cleanup
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 what 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</version> </dependency>