commit | 905dde21769a2b5a361193c549fe5ed3d3eb0aa6 | [log] [tgz] |
---|---|---|
author | Adrian Stabiszewski <github@grundid.de> | Thu Nov 19 12:29:59 2015 +0100 |
committer | Adrian Stabiszewski <github@grundid.de> | Thu Nov 19 12:29:59 2015 +0100 |
tree | 8c9056881c803c15d263cd16df5849806d5d3591 | |
parent | fe528206475a1125af18ba7bd1dff9d562dfaede [diff] | |
parent | 203903550f9a7c5c3388f27a2018f877ad7edba7 [diff] |
Merge pull request #26 from pigelvy/ADD_GEOJSONOBJECT_VISITOR_ADAPTER add GeoJsonObjectVisitor.Adapter
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>1.5.1</version> </dependency>