| commit | ddaed26f746285bdc5a87e719e73588c92fe6ed6 | [log] [tgz] |
|---|---|---|
| author | Neil Fuller <nfuller@google.com> | Wed Aug 05 20:59:46 2020 +0100 |
| committer | Neil Fuller <nfuller@google.com> | Wed Aug 05 21:14:07 2020 +0100 |
| tree | abec087287f46273fdf819491df785c191d85d0a | |
| parent | 2431afb27465e3663dbb545f1f46344367809649 [diff] |
Adding files required for external/ Test: None Bug: 152747091 Change-Id: I6b928fa2bfe9ed8467433e96eef33ef0fcb1dcf6
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>