v1.6 FeatureCollection增加header属性

Author: codingmiao

giscat-vector/giscat-vector-mbexpression/pom.xml

@@ -5,12 +5,12 @@
     <parent>
         <artifactId>giscat-vector</artifactId>
         <groupId>org.wowtools</groupId>
-        <version>g1.5.2</version>
+        <version>g1.6.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>giscat-vector-mbexpression</artifactId>
-    <version>g1.5.2</version>
+    <version>g1.6.0</version>
     <description>mapbox expressions表达式解析为java对象，用以支持数据过滤等场景</description>
 
     <dependencies>

giscat-vector/giscat-vector-mvt/pom.xml

@@ -5,12 +5,12 @@
     <parent>
         <artifactId>giscat</artifactId>
         <groupId>org.wowtools</groupId>
-        <version>g1.5.2</version>
+        <version>g1.6.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>giscat-vector-mvt</artifactId>
-    <version>g1.5.2</version>
+    <version>g1.6.0</version>
     <description>Mapbox vector tile (mvt) 的序列化与反序列化</description>
 
     <dependencies>

giscat-vector/giscat-vector-pojo/pom.xml

@@ -5,12 +5,12 @@
     <parent>
         <artifactId>giscat-vector</artifactId>
         <groupId>org.wowtools</groupId>
-        <version>g1.5.2</version>
+        <version>g1.6.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>giscat-vector-pojo</artifactId>
-    <version>g1.5.2</version>
+    <version>g1.6.0</version>
     <dependencies>
         <dependency>
             <groupId>org.locationtech.jts</groupId>

giscat-vector/giscat-vector-pojo/src/main/java/org/wowtools/giscat/vector/pojo/FeatureCollection.java

@@ -20,6 +20,7 @@
 package org.wowtools.giscat.vector.pojo;
 
 import java.util.List;
+import java.util.Map;
 
 /**
  * FeatureCollection
@@ -28,13 +29,29 @@
  * @date 2022/3/15
  */
 public class FeatureCollection {
+    /**
+     * 要素
+     */
     private List<Feature> features;
 
+    /**
+     * 头信息，可以在headers中添加一些关于FeatureCollection、features等的描述信息
+     */
+    private Map<String, Object> headers;
+
     public List<Feature> getFeatures() {
         return features;
     }
 
     public void setFeatures(List<Feature> features) {
         this.features = features;
     }
+
+    public Map<String, Object> getHeaders() {
+        return headers;
+    }
+
+    public void setHeaders(Map<String, Object> headers) {
+        this.headers = headers;
+    }
 }

giscat-vector/giscat-vector-pojo/src/main/java/org/wowtools/giscat/vector/pojo/GeoJsonObject.java

@@ -262,6 +262,7 @@ public String toGeoJsonString() {
     public static final class FeatureCollection {
         private final String type = "FeatureCollection";
         private Feature[] features;
+        private Map<String, Object> headers;
 
         @JsonIgnore
         public String toGeoJsonString() {

giscat-vector/giscat-vector-pojo/src/main/java/org/wowtools/giscat/vector/pojo/converter/GeoJsonFeatureConverter.java

@@ -19,6 +19,7 @@
  ****************************************************************/
 package org.wowtools.giscat.vector.pojo.converter;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JavaType;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -45,6 +46,9 @@ public class GeoJsonFeatureConverter {
      * jackson ObjectMapper
      */
     public static final ObjectMapper mapper = new ObjectMapper();
+    static {
+        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+    }
 
     private static final JavaType typeGeometry = mapper.constructType(GeoJsonObject.Geometry.class);
     private static final JavaType typeFeature = mapper.constructType(GeoJsonObject.Feature.class);
@@ -102,14 +106,20 @@ public static GeoJsonObject.Feature toGeoJson(Feature feature) {
      * @return geojson
      */
     public static GeoJsonObject.FeatureCollection toGeoJson(FeatureCollection featureCollection) {
+        GeoJsonObject.FeatureCollection geoJsonFeatureCollection = new GeoJsonObject.FeatureCollection();
+
+        if (null != featureCollection.getHeaders()) {
+            geoJsonFeatureCollection.setHeaders(featureCollection.getHeaders());
+        }
+
         GeoJsonObject.Feature[] geoJsonFeatures = new GeoJsonObject.Feature[featureCollection.getFeatures().size()];
         int i = 0;
-        GeoJsonObject.FeatureCollection geoJsonFeatureCollection = new GeoJsonObject.FeatureCollection();
         for (Feature feature : featureCollection.getFeatures()) {
             geoJsonFeatures[i] = toGeoJson(feature);
             i++;
         }
         geoJsonFeatureCollection.setFeatures(geoJsonFeatures);
+
         return geoJsonFeatureCollection;
     }
 
@@ -218,13 +228,17 @@ public static FeatureCollection fromGeoJsonFeatureCollection(String strGeoJsonFe
      * @return FeatureCollection
      */
     public static FeatureCollection fromGeoJsonFeatureCollection(GeoJsonObject.FeatureCollection geoJsonFeatureCollection, GeometryFactory geometryFactory) {
+        FeatureCollection featureCollection = new FeatureCollection();
+
+        featureCollection.setHeaders(geoJsonFeatureCollection.getHeaders());
+
         List<Feature> features = new ArrayList<>(geoJsonFeatureCollection.getFeatures().length);
         for (int i = 0; i < geoJsonFeatureCollection.getFeatures().length; i++) {
             Feature feature = fromGeoJsonFeature(geoJsonFeatureCollection.getFeatures()[i], geometryFactory);
             features.add(feature);
         }
-        FeatureCollection featureCollection = new FeatureCollection();
         featureCollection.setFeatures(features);
+
         return featureCollection;
     }
 

giscat-vector/giscat-vector-pojo/src/main/java/org/wowtools/giscat/vector/pojo/converter/ProtoFeatureConverter.java

@@ -550,7 +550,7 @@ public static byte[] feature2Proto(Feature feature) {
         return featureCollection2Proto(fc);
     }
 
-    private static ProtoFeature.Map.Builder putPropertiesToCell(Map<String, Object> properties,ToProtoKeyValueCell keyValueCell) {
+    private static ProtoFeature.Map.Builder putPropertiesToCell(Map<String, Object> properties, ToProtoKeyValueCell keyValueCell) {
         ProtoFeature.Map.Builder propertiesBuilder = ProtoFeature.Map.newBuilder();
         properties.forEach((k, v) -> {
             if (null == v) {
@@ -570,23 +570,31 @@ private static ProtoFeature.Map.Builder putPropertiesToCell(Map<String, Object>
      * @return ProtoFeature bytes
      */
     public static byte[] featureCollection2Proto(FeatureCollection featureCollection) {
-        ToProtoKeyValueCell keyValueCell = new ToProtoKeyValueCell();//收集key-value与id对应关系
         ProtoFeature.FeatureCollection.Builder builder = ProtoFeature.FeatureCollection.newBuilder();
-        for (Feature feature : featureCollection.getFeatures()) {
-            //properties转换
-            Map<String, Object> properties = feature.getProperties();
-            if (null != properties) {
-                ProtoFeature.Map.Builder propertiesBuilder = putPropertiesToCell(properties, keyValueCell);
-                builder.addPropertiess(propertiesBuilder);
-            } else {
-                builder.addPropertiess(nullMap);
+        ToProtoKeyValueCell keyValueCell = new ToProtoKeyValueCell();//收集key-value与id对应关系
+        //转换头信息
+        if (null != featureCollection.getHeaders()) {
+            ProtoFeature.Map.Builder propertiesBuilder = putPropertiesToCell(featureCollection.getHeaders(), keyValueCell);
+            builder.setHeaders(propertiesBuilder);
+        }
+        //转换features
+        if (null != featureCollection.getFeatures()) {
+            for (Feature feature : featureCollection.getFeatures()) {
+                //properties转换
+                Map<String, Object> properties = feature.getProperties();
+                if (null != properties) {
+                    ProtoFeature.Map.Builder propertiesBuilder = putPropertiesToCell(properties, keyValueCell);
+                    builder.addPropertiess(propertiesBuilder);
+                } else {
+                    builder.addPropertiess(nullMap);
+                }
+                //geometry转换
+                Geometry geometry = feature.getGeometry();
+                ProtoFeature.Geometry.Builder geometryBuilder = geometry2ProtoBuilder(geometry);
+                builder.addGeometries(geometryBuilder);
             }
-            //geometry转换
-            Geometry geometry = feature.getGeometry();
-            ProtoFeature.Geometry.Builder geometryBuilder = geometry2ProtoBuilder(geometry);
-            builder.addGeometries(geometryBuilder);
-
         }
+
         keyValueCell.toProto(builder);
         return builder.build().toByteArray();
     }
@@ -988,9 +996,18 @@ public static FeatureCollection proto2featureCollection(byte[] bytes, GeometryFa
         } catch (InvalidProtocolBufferException e) {
             throw new RuntimeException(e);
         }
+        FeatureCollection featureCollection = new FeatureCollection();
+
         //构造Properties 真实值
         FromProtoKeyValueCell keyValueCell = new FromProtoKeyValueCell(pFeatureCollection);
 
+        //构造headers
+        if (pFeatureCollection.hasHeaders()) {
+            ProtoFeature.Map pHeaders = pFeatureCollection.getHeaders();
+            Map<String, Object> headers = keyValueCell.parseProperties(pHeaders);
+            featureCollection.setHeaders(headers);
+        }
+
         //构造feature
         int featureNum = pFeatureCollection.getGeometriesCount();
         ArrayList<Feature> features = new ArrayList<>(featureNum);
@@ -1007,9 +1024,8 @@ public static FeatureCollection proto2featureCollection(byte[] bytes, GeometryFa
 
             features.add(feature);
         }
-
-        FeatureCollection featureCollection = new FeatureCollection();
         featureCollection.setFeatures(features);
+
         return featureCollection;
     }