Structured grid coverage controller implementation

src/restconfig-ng/pom.xml

@@ -31,7 +31,11 @@
       <artifactId>gs-wcs</artifactId>
       <version>${project.version}</version>
     </dependency>
-
+    <dependency>
+      <groupId>org.geotools</groupId>
+      <artifactId>gt-geojson</artifactId>
+      <version>${gt.version}</version>
+    </dependency>
     <!-- Test dependencies -->
     <dependency>
       <groupId>org.geoserver</groupId>

src/restconfig-ng/src/main/java/org/geoserver/catalog/rest/FeatureCollectionConverter.java

@@ -0,0 +1,38 @@
+/* (c) 2017 Open Source Geospatial Foundation - all rights reserved
+ * This code is licensed under the GPL 2.0 license, available at the root
+ * application directory.
+ */
+package org.geoserver.catalog.rest;
+
+import java.io.IOException;
+
+import org.geoserver.rest.converters.BaseMessageConverter;
+import org.geotools.data.simple.SimpleFeatureCollection;
+import org.springframework.http.HttpInputMessage;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+
+/**
+ * Base class for converters handling (wrapped) feature collections
+ */
+public abstract class FeatureCollectionConverter extends BaseMessageConverter {
+
+    @Override
+    public boolean canRead(Class clazz, MediaType mediaType) {
+        return false;
+    }
+
+    @Override
+    public Object read(Class clazz, HttpInputMessage inputMessage)
+            throws IOException, HttpMessageNotReadableException {
+        throw new UnsupportedOperationException();
+    }
+
+    SimpleFeatureCollection getFeatures(Object o) {
+        if(o instanceof FormatCollectionWrapper) {
+            return ((FormatCollectionWrapper) o).getCollection();
+        } else {
+            return (SimpleFeatureCollection) o;
+        }
+    }
+}

src/restconfig-ng/src/main/java/org/geoserver/catalog/rest/FormatCollectionWrapper.java

@@ -0,0 +1,40 @@
+/* (c) 2017 Open Source Geospatial Foundation - all rights reserved
+ * This code is licensed under the GPL 2.0 license, available at the root
+ * application directory.
+ */
+package org.geoserver.catalog.rest;
+
+import org.geotools.data.simple.SimpleFeatureCollection;
+
+/**
+ * Base class for collection wrappers used to decide the output format in the controller code
+ */
+public abstract class FormatCollectionWrapper {
+
+    SimpleFeatureCollection collection;
+
+    public FormatCollectionWrapper(SimpleFeatureCollection collection) {
+        this.collection = collection;
+    }
+
+    public SimpleFeatureCollection getCollection() {
+        return collection;
+    }
+
+    public static class XMLCollectionWrapper extends FormatCollectionWrapper {
+
+        public XMLCollectionWrapper(SimpleFeatureCollection collection) {
+            super(collection);
+        }
+
+    }
+
+    public static class JSONCollectionWrapper extends FormatCollectionWrapper {
+
+        public JSONCollectionWrapper(SimpleFeatureCollection collection) {
+            super(collection);
+        }
+
+    }
+
+}

src/restconfig-ng/src/main/java/org/geoserver/catalog/rest/GMLFeatureCollectionConverter.java

@@ -0,0 +1,45 @@
+/* (c) 2017 Open Source Geospatial Foundation - all rights reserved
+ * This code is licensed under the GPL 2.0 license, available at the root
+ * application directory.
+ */
+package org.geoserver.catalog.rest;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+import org.geoserver.catalog.rest.FormatCollectionWrapper.XMLCollectionWrapper;
+import org.geotools.GML;
+import org.geotools.GML.Version;
+import org.geotools.data.simple.SimpleFeatureCollection;
+import org.springframework.http.HttpOutputMessage;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.HttpMessageNotWritableException;
+import org.springframework.stereotype.Component;
+
+@Component
+public class GMLFeatureCollectionConverter extends FeatureCollectionConverter {
+
+    @Override
+    public List getSupportedMediaTypes() {
+        return Arrays.asList(MediaType.APPLICATION_XML);
+    }
+
+    @Override
+    public void write(Object t, MediaType contentType, HttpOutputMessage outputMessage)
+            throws IOException, HttpMessageNotWritableException {
+        SimpleFeatureCollection features = getFeatures(t);
+        GML gml = new GML(Version.WFS1_0);
+        gml.setNamespace("gf", features.getSchema().getName().getNamespaceURI());
+        // gml.setFeatureBounding(false);
+        gml.encode(outputMessage.getBody(), features);
+    }
+
+    @Override
+    public boolean canWrite(Class clazz, MediaType mediaType) {
+        return (SimpleFeatureCollection.class.isAssignableFrom(clazz)
+                | XMLCollectionWrapper.class.isAssignableFrom(clazz))
+                && getSupportedMediaTypes().contains(mediaType);
+    }
+
+}

src/restconfig-ng/src/main/java/org/geoserver/catalog/rest/GeoJSONFeatureCollectionConverter.java

@@ -0,0 +1,45 @@
+/* (c) 2017 Open Source Geospatial Foundation - all rights reserved
+ * This code is licensed under the GPL 2.0 license, available at the root
+ * application directory.
+ */
+package org.geoserver.catalog.rest;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+import org.geoserver.catalog.rest.FormatCollectionWrapper.JSONCollectionWrapper;
+import org.geotools.data.simple.SimpleFeatureCollection;
+import org.geotools.geojson.feature.FeatureJSON;
+import org.springframework.http.HttpOutputMessage;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.HttpMessageNotWritableException;
+import org.springframework.stereotype.Component;
+
+@Component
+public class GeoJSONFeatureCollectionConverter extends FeatureCollectionConverter {
+
+    @Override
+    public List getSupportedMediaTypes() {
+        return Arrays.asList(MediaType.APPLICATION_JSON,
+                MediaType.valueOf(CatalogController.TEXT_JSON));
+    }
+
+    @Override
+    public void write(Object t, MediaType contentType, HttpOutputMessage outputMessage)
+            throws IOException, HttpMessageNotWritableException {
+        SimpleFeatureCollection features = getFeatures(t);
+        final FeatureJSON json = new FeatureJSON();
+        boolean geometryless = features.getSchema().getGeometryDescriptor() == null;
+        json.setEncodeFeatureCollectionBounds(!geometryless);
+        json.setEncodeFeatureCollectionCRS(!geometryless);
+        json.writeFeatureCollection(features, outputMessage.getBody());
+    }
+
+    @Override
+    public boolean canWrite(Class clazz, MediaType mediaType) {
+        return (SimpleFeatureCollection.class.isAssignableFrom(clazz) && getSupportedMediaTypes().contains(mediaType))
+                || JSONCollectionWrapper.class.isAssignableFrom(clazz);
+    }
+
+}