package com.lf.server.helper;
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import com.lf.server.entity.ctrl.MarkJsonEntity;
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import com.lf.server.entity.ctrl.ShpRecordEntity;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.gdal.ogr.*;
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import org.gdal.osr.SpatialReference;
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import java.io.File;
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import java.lang.reflect.Field;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* ShapeFile帮助类
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* @author WWW
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*/
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public class ShpHelper {
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private final static Log log = LogFactory.getLog(ShpHelper.class);
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/**
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* 读取Shp第一条记录的WKT
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*/
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public static ShpRecordEntity readShpFirstRecord(String filePath) {
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try {
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org.gdal.ogr.Driver driver = ogr.GetDriverByName("ESRI shapefile");
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if (driver == null) {
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return null;
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}
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DataSource dataSource = driver.Open(filePath);
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Layer layer = dataSource.GetLayer(0);
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if (layer.GetFeatureCount() < 1) {
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return null;
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}
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SpatialReference spatialReference = layer.GetSpatialRef();
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String csid = spatialReference.GetAttrValue("AUTHORITY", 1);
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Feature feature = layer.GetFeature(0);
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String wkt = feature.GetGeometryRef().ExportToWkt();
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layer.delete();
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dataSource.delete();
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driver.delete();
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return new ShpRecordEntity(wkt, csid);
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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return null;
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}
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}
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/**
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* 读取ShapeFile文件获取Mark实体类
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*/
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public static List<MarkJsonEntity> readShpForMarks(String filePath) {
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try {
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org.gdal.ogr.Driver driver = ogr.GetDriverByName("ESRI shapefile");
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if (driver == null) {
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return null;
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}
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DataSource dataSource = driver.Open(filePath);
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Layer layer = dataSource.GetLayer(0);
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FeatureDefn featureDefn = layer.GetLayerDefn();
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Map<Integer, Field> fieldMap = new HashMap(5);
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for (int i = 0, count = featureDefn.GetFieldCount(); i < count; i++) {
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try {
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FieldDefn fieldDefn = featureDefn.GetFieldDefn(i);
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Field field = MarkJsonEntity.class.getDeclaredField(fieldDefn.GetName().toLowerCase());
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field.setAccessible(true);
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fieldMap.put(i, field);
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} catch (Exception e) {
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//
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}
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}
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long count = layer.GetFeatureCount();
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if (count == 0 || fieldMap.size() == 0) {
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return null;
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}
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List<MarkJsonEntity> list = new ArrayList<MarkJsonEntity>();
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for (int i = 0; i < count; i++) {
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Feature f = layer.GetFeature(i);
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MarkJsonEntity me = new MarkJsonEntity(i + 1);
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for (Integer key : fieldMap.keySet()) {
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Field field = fieldMap.get(key);
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switch (field.getType().toString()) {
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case "double":
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field.set(me, f.GetFieldAsDouble(i));
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break;
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case "long":
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field.set(me, f.GetFieldAsInteger64(i));
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break;
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case "int":
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field.set(me, f.GetFieldAsInteger(i));
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break;
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default:
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field.set(me, f.GetFieldAsString(i));
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break;
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}
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}
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me.setWkt(f.GetGeometryRef().ExportToWkt());
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list.add(me);
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}
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layer.delete();
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driver.delete();
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return list;
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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return null;
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}
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}
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/**
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* 创建ShapeFile文件
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*
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* @param list 标绘JSON实体类集合
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* @param path 路径
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* @param type 类型：POINT,LINESTRING,POLYGON
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* @return ShapeFile文件名
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*/
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public static String createShp(List<MarkJsonEntity> list, String path, String type) {
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try {
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org.gdal.ogr.Driver driver = ogr.GetDriverByName("ESRI shapefile");
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if (driver == null) {
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return null;
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}
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String filePath = path + File.separator + type.toLowerCase() + ".shp";
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// DataSource ds = driver.Open(filePath, 0)
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DataSource ds = driver.CreateDataSource(filePath, null);
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SpatialReference sr = new SpatialReference();
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sr.ImportFromEPSG(4326);
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int geoType = getGeometryType(type);
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Layer layer = ds.CreateLayer(type.toLowerCase(), sr, geoType);
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FieldDefn fdName = new FieldDefn("name", ogr.OFTString);
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fdName.SetWidth(50);
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layer.CreateField(fdName, 0);
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FieldDefn fdProps = new FieldDefn("props", ogr.OFTString);
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fdProps.SetWidth(1024);
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// layer.DeleteField(layer.FindFieldIndex("name", 1))
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layer.CreateField(fdProps, 1);
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FeatureDefn featureDefn = layer.GetLayerDefn();
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for (MarkJsonEntity mje : list) {
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Geometry geo = Geometry.CreateFromWkt(mje.getWkt());
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Feature f = new Feature(featureDefn);
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f.SetField(0, mje.getName());
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f.SetField(1, mje.getProps());
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f.SetGeometry(geo);
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layer.CreateFeature(f);
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}
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layer.delete();
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ds.delete();
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driver.delete();
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return filePath;
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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return null;
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}
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}
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/**
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* 获取图形类型
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*/
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private static int getGeometryType(String type) {
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switch (type) {
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case "POINT":
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return 1;
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case "LINESTRING":
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return 2;
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case "POLYGON":
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return 3;
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default:
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return -1;
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}
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}
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/**
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* 读取数据
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*/
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public static <T> List<T> readData(Class clazz, String filePath) {
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List<T> list = new ArrayList<>();
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try {
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org.gdal.ogr.Driver driver = ogr.GetDriverByName("ESRI shapefile");
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if (null == driver) {
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return list;
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}
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DataSource dataSource = driver.Open(filePath);
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if (null == dataSource) {
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return list;
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}
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Layer layer = dataSource.GetLayer(0);
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GdbHelper.readLayer(clazz, layer, list);
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dataSource.delete();
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driver.delete();
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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}
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return list;
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}
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}
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