Once the application schema datastore is configured we could use the GetFeature operation from the WFS service to get all the data or a portion of them.
Doing an HTTP POST to the WFS service url http://localhost:8080/geoavalanche/ows
<wfs:GetFeature service="WFS" version="2.0.0"
xmlns:caaml="http://caaml.org/Schemas/V5.0/Profiles/BulletinEAWS"
xmlns:wfs="http://www.opengis.net/wfs/2.0"
xmlns:fes="http://www.opengis.net/fes/2.0"
xmlns:gml="http://www.opengis.net/gml/3.2">
<wfs:Query typeNames="caaml:Region">
<fes:Filter>
<fes:PropertyIsLike wildCard="*" singleChar="." escapeChar="\">
<fes:ValueReference>caaml:name</fes:ValueReference>
<fes:Literal>Appennino*</fes:Literal>
</fes:PropertyIsLike>
</fes:Filter>
</wfs:Query>
</wfs:GetFeature>
We would get something like:
<?xml version="1.0" encoding="UTF-8"?>
<wfs:FeatureCollection xmlns:wfs="http://www.opengis.net/wfs/2.0" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:caaml="http://caaml.org/Schemas/V5.0/Profiles/BulletinEAWS" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:topp="http://www.openplans.org/topp" xmlns:it.geosolutions="http://www.geo-solutions.it" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" numberMatched="unknown" numberReturned="2" timeStamp="2018-10-11T09:44:10.008Z" xsi:schemaLocation="http://www.opengis.net/wfs/2.0 http://localhost:8080/geoavalanche/schemas/wfs/2.0/wfs.xsd http://caaml.org/Schemas/V5.0/Profiles/BulletinEAWS file:/Users/geobart/Development/GeoAvalanche/caaml/CAAMLv5_BulletinEAWS_GA.xsd http://www.opengis.net/gml/3.2 http://localhost:8080/geoavalanche/schemas/gml/3.2.1/gml.xsd">
<wfs:member>
<caaml:Region gml:id="region.IT49">
<caaml:description>Appennino Pesarese</caaml:description>
<caaml:name>Appennino Pesarese</caaml:name>
<caaml:regionSubType>ForecastRegion</caaml:regionSubType>
<caaml:centerPoint>
<gml:Point srsDimension="2" srsName="urn:ogc:def:crs:EPSG::4326">
<gml:pos>43.57463312 12.64107229</gml:pos>
</gml:Point>
</caaml:centerPoint>
<caaml:outline>
<gml:MultiSurface srsDimension="2" srsName="urn:ogc:def:crs:EPSG::4326">
<gml:surfaceMember>
<gml:Polygon srsDimension="2">
<gml:exterior>
<gml:LinearRing>
<gml:posList>43.90485923 12.44807412 43.89968465 12.44719969 43.82635284 12.44702362 43.77034646 12.45594596 43.73129507 12.48606092 43.69734487 12.54069584 43.66438207 12.56300126 43.63790306 12.56547342 43.6277255 12.60929448 43.61219047 12.6366262 43.6226109 12.67763651 43.62716079 12.71829864
<!-- ... -->
43.60720687 12.41662203 43.60701585 12.41657443 43.60677385 12.41627458 43.60666955 12.415811 43.60655881 12.41526149 43.60644978 12.41499357 43.60612679 12.41465469 43.60568709 12.41438005 43.6053249 12.41422325</gml:posList>
</gml:LinearRing>
</gml:interior>
</gml:Polygon>
</gml:surfaceMember>
</gml:MultiSurface>
</caaml:outline>
</caaml:Region>
</wfs:member>
<wfs:member>
<caaml:Region gml:id="region.IT50">
<caaml:description>Appennino Fabrianese</caaml:description>
<caaml:name>Appennino Fabrianese</caaml:name>
<caaml:regionSubType>ForecastRegion</caaml:regionSubType>
<caaml:centerPoint>
<gml:Point srsDimension="2" srsName="urn:ogc:def:crs:EPSG::4326">
<gml:pos>43.24536546 13.11985868</gml:pos>
</gml:Point>
</caaml:centerPoint>
<caaml:outline>
<gml:MultiSurface srsDimension="2" srsName="urn:ogc:def:crs:EPSG::4326">
<gml:surfaceMember>
<gml:Polygon srsDimension="2">
<gml:exterior>
<gml:LinearRing>
<gml:posList>43.38945036 13.16105574 43.38889088 13.16224021 43.38712536 13.21038635 43.37571683 13.20155253 43.36064325 13.21257185 43.34512321 13.23561335 43.35345403 13.24825378 43.36485875 13.25709254 43.38443918 13.28259733 43.38953627 13.30306883 43.39478143 13.31953159 43.40572262 13.34042772 43.41281171 13.38519808 43.40911384 13.40504911 43.387706
<!-- ... -->
12.75240046 43.38219149 12.76360327 43.38026549 12.90827252 43.38975742 12.97324341 43.39085672 13.02560867 43.38665101 13.06153034 43.38900541 13.07777749 43.39385151 13.10626213 43.37264377 13.12493514 43.37733225 13.1574265 43.38945036 13.16105574</gml:posList>
</gml:LinearRing>
</gml:exterior>
</gml:Polygon>
</gml:surfaceMember>
</gml:MultiSurface>
</caaml:outline>
</caaml:Region>
</wfs:member>
</wfs:FeatureCollection>
It's still possible among all the supported output formats of GeoServer
curl -X GET http://localhost:8080/geoavalanche/caaml/ows?service=WFS&version=1.0.0&request=GetFeature&typeName=caaml:Region&maxFeatures=1&outputFormat=application/json{
"type": "FeatureCollection",
"totalFeatures": "unknown",
"features": [
{
"type": "Feature",
"id": "region.IT1",
"geometry": {
"type": "Point",
"coordinates": [
7.83197134,
44.22844477
]
},
"properties": {
"outline": {
"type": "MultiPolygon",
"coordinates": [
[
{...}
]
]
},
"description": "Alpi Liguri",
"name": "Alpi Liguri",
"regionSubType": "ForecastRegion"
}
}
],
"crs": {
"type": "name",
"properties": {
"name": "urn:ogc:def:crs:EPSG::4326"
}
}
}