From e838d2cb88312cf4dd2b6a242e5dd83de0855c35 Mon Sep 17 00:00:00 2001
From: "hukekuan@163.com" <hukekuan@163.com>
Date: Fri, 30 Mar 2018 17:02:38 +0800
Subject: [PATCH] =?UTF-8?q?=E5=88=9D=E5=A7=8B=E5=8C=96?=
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---
 .../spatial/common/FeatureUtilities.java      | 39 ++++++++++++++++++-
 .../spatial/common/GeometryUtilities.java     |  4 +-
 src/test/java/com/gis3c/spatial/App.java      | 19 +++++----
 3 files changed, 51 insertions(+), 11 deletions(-)

diff --git a/src/main/java/com/gis3c/spatial/common/FeatureUtilities.java b/src/main/java/com/gis3c/spatial/common/FeatureUtilities.java
index b0b1a79..5beb3dc 100644
--- a/src/main/java/com/gis3c/spatial/common/FeatureUtilities.java
+++ b/src/main/java/com/gis3c/spatial/common/FeatureUtilities.java
@@ -2,16 +2,21 @@ package com.gis3c.spatial.common;
 
 
 import com.gis3c.spatial.entity.BaseFeature;
+import com.vividsolutions.jts.geom.Geometry;
 import org.geotools.data.DataUtilities;
 import org.geotools.data.simple.SimpleFeatureCollection;
+import org.geotools.factory.CommonFactoryFinder;
+import org.geotools.filter.text.cql2.CQL;
+import org.geotools.filter.text.cql2.CQLException;
 import org.geotools.geojson.feature.FeatureJSON;
 import org.opengis.feature.simple.SimpleFeature;
+import org.opengis.filter.Filter;
+import org.opengis.filter.FilterFactory2;
 
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.StringWriter;
-import java.util.ArrayList;
-import java.util.List;
+import java.util.*;
 
 /**
  * Created by hukekuan on 2018/1/16.
@@ -165,4 +170,34 @@ public class FeatureUtilities {
 
         return result;
     }
+
+    public static SimpleFeatureCollection FeatureCollectionFilter(
+            SimpleFeatureCollection featureCollection, Geometry geometry,String whereClause) throws CQLException {
+        SimpleFeatureCollection resultCollection = null;
+        if(featureCollection == null || featureCollection.size() == 0){
+            return featureCollection;
+        }
+        if(geometry == null && (whereClause == null || "".equals(whereClause))){
+            throw new IllegalArgumentException("参数输入有误");
+        }
+
+        FilterFactory2 filterFactory = CommonFactoryFinder.getFilterFactory2();
+        List<Filter> filterList = new ArrayList<>();
+        if(geometry != null){
+            if(geometry.getSRID() == 0){
+                geometry.setSRID(4326);
+            }
+            String geometryPropertyName = featureCollection.getSchema().getGeometryDescriptor().getLocalName();
+            filterList.add(filterFactory.intersects(filterFactory.property(geometryPropertyName), filterFactory.literal(geometry)));
+        }
+        if(whereClause != null && !"".equals(whereClause)){
+            filterList.add(CQL.toFilter(whereClause));
+        }
+        if(filterList.size() == 1){
+            resultCollection = featureCollection.subCollection(filterList.get(0));
+        }else if(filterList.size() == 2){
+            resultCollection = featureCollection.subCollection(filterFactory.and(filterList.get(0),filterList.get(1)));
+        }
+        return resultCollection;
+    }
 }
diff --git a/src/main/java/com/gis3c/spatial/common/GeometryUtilities.java b/src/main/java/com/gis3c/spatial/common/GeometryUtilities.java
index 071973d..4901030 100644
--- a/src/main/java/com/gis3c/spatial/common/GeometryUtilities.java
+++ b/src/main/java/com/gis3c/spatial/common/GeometryUtilities.java
@@ -44,7 +44,7 @@ public class GeometryUtilities {
      * @return
      */
     public static Point CreatePoint(double lon, double lat){
-        return geomFactory.createPoint(new Coordinate(lat, lon));
+        return geomFactory.createPoint(new Coordinate(lon,lat));
     }
 
     /**
@@ -324,7 +324,7 @@ public class GeometryUtilities {
      * @param distance
      * @return
      */
-    public Polygon CreateBuffer(Geometry geometry,Double distance){
+    public static Polygon CreateBuffer(Geometry geometry,Double distance){
         Polygon bufferResult = null;
         if(geometry == null || distance == null){
             throw new IllegalArgumentException("参数输入有误");
diff --git a/src/test/java/com/gis3c/spatial/App.java b/src/test/java/com/gis3c/spatial/App.java
index 28b9586..a56e8d7 100644
--- a/src/test/java/com/gis3c/spatial/App.java
+++ b/src/test/java/com/gis3c/spatial/App.java
@@ -37,13 +37,18 @@ public class App {
         ApplicationContext context = ApplicationInit();
 
 
-        Point start = GeometryUtilities.CreatePoint(118.024444,36.802778);
-        Point end = GeometryUtilities.CreatePoint(118.027777,36.759166);
-        try {
-            System.out.println(GeometryUtilities.PointDistance(start,end));
-        } catch (TransformException | FactoryException e) {
-            e.printStackTrace();
-        }
+        List<Double> data = new ArrayList<>(Arrays.asList(new Double[]{1.1,2.1,3.1}));
+        Double result = data.stream().max(Comparator.naturalOrder()).get();
+        System.out.println(result);
+
+
+//        Point start = GeometryUtilities.CreatePoint(118.024444,36.802778);
+//        Point end = GeometryUtilities.CreatePoint(118.027777,36.759166);
+//        try {
+//            System.out.println(GeometryUtilities.PointDistance(start,end));
+//        } catch (TransformException | FactoryException e) {
+//            e.printStackTrace();
+//        }
 
 
 //        List<Region> regionList = regionService.findRegionsByParentCode("370000");