[feat] #7 geojson data modeling added for FeatureCollection

src/main/java/com/github/nramc/dev/journey/api/geojson/FeatureCollection.java

@@ -0,0 +1,40 @@
+package com.github.nramc.dev.journey.api.geojson;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.github.nramc.dev.journey.api.geojson.types.GeoJsonType;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import org.apache.commons.collections4.CollectionUtils;
+
+import java.util.List;
+
+
+@Getter
+@ToString
+@EqualsAndHashCode(callSuper = false)
+public final class FeatureCollection extends GeoJson {
+    private final List<Feature> features;
+
+    public FeatureCollection(List<Feature> features) {
+        super(GeoJsonType.FEATURE_COLLECTION);
+        this.features = CollectionUtils.emptyIfNull(features).stream().toList();
+    }
+
+    @JsonCreator
+    public static FeatureCollection of(GeoJsonType type, List<Feature> features) {
+        if (type != GeoJsonType.FEATURE_COLLECTION) {
+            throw new IllegalArgumentException("Invalid type. expected 'FeatureCollection', but got " + type);
+        }
+        return new FeatureCollection(features);
+    }
+
+    public static FeatureCollection of(List<Feature> features) {
+        return of(GeoJsonType.FEATURE_COLLECTION, features);
+    }
+
+    public static FeatureCollection of(Feature... features) {
+        return of(List.of(features));
+    }
+
+}

src/test/java/com/github/nramc/dev/journey/api/geojson/FeatureCollectionTest.java

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+package com.github.nramc.dev.journey.api.geojson;
+
+import com.github.nramc.dev.journey.api.geojson.types.GeoJsonType;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.json.JsonTest;
+import org.springframework.boot.test.json.JacksonTester;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@JsonTest
+class FeatureCollectionTest {
+    @Autowired
+    private JacksonTester<FeatureCollection> jacksonTester;
+
+    @Test
+    void deserialization() throws IOException {
+        FeatureCollection object = jacksonTester.parseObject(Files.readString(Path.of("src/test/resources/data/feature-collection.json")));
+        assertThat(object).isNotNull()
+                .satisfies(featureCollection -> assertThat(featureCollection.getType()).isEqualTo(GeoJsonType.Constants.FEATURE_COLLECTION_VALUE))
+                .extracting(FeatureCollection::getFeatures)
+                .asList().isNotEmpty()
+                .hasSize(3);
+    }
+
+}

src/test/resources/data/feature-collection.json

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+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "id": "ID_001",
+      "type": "Feature",
+      "properties": {
+        "name": "Olympic Park",
+        "size": "85 hectares"
+      },
+      "geometry": {
+        "type": "Point",
+        "coordinates": [100.0, 0.0]
+      }
+    },
+    {
+      "id": "ID_002",
+      "type": "Feature",
+      "properties": {
+        "name": "English garden",
+        "size": "384 hectares"
+      },
+      "geometry": {
+        "type": "LineString",
+        "coordinates": [
+          [101.0, 0.0],
+          [102.0, 1.0]
+        ]
+      }
+    },
+    {
+      "id": "ID_003",
+      "type": "Feature",
+      "properties": {
+        "name": "Hirschgarten",
+        "size": "40 hectares"
+      },
+      "geometry": {
+        "type": "Polygon",
+        "coordinates": [
+          [
+            [100.0, 0.0],
+            [101.0, 0.0],
+            [101.0, 1.0],
+            [100.0, 1.0],
+            [100.0, 0.0]
+          ]
+        ]
+      }
+    }
+  ]
+}