package com.lf.server.helper;
|
|
import org.apache.commons.logging.Log;
|
import org.apache.commons.logging.LogFactory;
|
import org.gdal.ogr.*;
|
|
import java.lang.reflect.Field;
|
import java.util.ArrayList;
|
import java.util.HashMap;
|
import java.util.List;
|
import java.util.Map;
|
|
/**
|
* GDB帮助类
|
* @author WWW
|
*/
|
public class GdbHelper {
|
private final static Log log = LogFactory.getLog(GdbHelper.class);
|
|
/**
|
* 获取表名
|
*/
|
public static List<String> getTabNames(String filePath) {
|
List<String> list = new ArrayList<>();
|
try {
|
org.gdal.ogr.Driver driver = ogr.GetDriverByName("OpenFileGDB");
|
if (driver == null) {
|
return list;
|
}
|
|
DataSource dataSource = driver.Open(filePath, 0);
|
for (int i = 0, count = dataSource.GetLayerCount(); i < count; i++) {
|
Layer layer = dataSource.GetLayer(i);
|
|
list.add(layer.GetName());
|
}
|
} catch (Exception ex) {
|
log.error(ex.getMessage(), ex);
|
}
|
|
return list;
|
}
|
|
/**
|
* 读取数据
|
*/
|
public static <T> List<T> readData(Class clazz, String filePath, String layerName) {
|
List<T> list = new ArrayList<>();
|
try {
|
org.gdal.ogr.Driver driver = ogr.GetDriverByName("OpenFileGDB");
|
if (driver == null) {
|
return list;
|
}
|
|
DataSource dataSource = driver.Open(filePath, 0);
|
for (int i = 0, count = dataSource.GetLayerCount(); i < count; i++) {
|
Layer layer = dataSource.GetLayer(i);
|
|
if (layer.GetName().equals(layerName)) {
|
GdbHelper.readLayer(clazz, layer, list);
|
break;
|
}
|
|
layer.delete();
|
}
|
|
driver.delete();
|
} catch (Exception ex) {
|
log.error(ex.getMessage(), ex);
|
}
|
|
return list;
|
}
|
|
/**
|
* 读取图层
|
*/
|
public static <T> void readLayer(Class clazz, Layer layer, List<T> list) {
|
try {
|
Field gField = getGeomField(clazz);
|
Map<Integer, Field> map = getFieldMapper(clazz, layer);
|
if (map.size() == 0) {
|
return;
|
}
|
|
do {
|
Feature f = layer.GetNextFeature();
|
if (null == f) {
|
break;
|
}
|
|
T t = (T) clazz.newInstance();
|
if (readFeature(t, f, map, gField)) {
|
list.add(t);
|
}
|
} while (true);
|
} catch (Exception ex) {
|
log.error(ex.getMessage(), ex);
|
} finally {
|
if (null != layer) {
|
layer.delete();
|
}
|
}
|
}
|
|
/**
|
* 获取 geom 字段
|
*/
|
private static Field getGeomField(Class clazz) {
|
try {
|
Field gField = clazz.getDeclaredField("geom");
|
gField.setAccessible(true);
|
|
return gField;
|
} catch (Exception ex) {
|
return null;
|
}
|
}
|
|
/**
|
* 获取字段映射
|
*/
|
private static <T> Map<Integer, Field> getFieldMapper(Class clazz, Layer layer) {
|
Map<Integer, Field> map = new HashMap<>(3);
|
|
try {
|
FeatureDefn fd = layer.GetLayerDefn();
|
for (int i = 0, count = fd.GetFieldCount(); i < count; i++) {
|
FieldDefn fieldDefn = fd.GetFieldDefn(i);
|
try {
|
Field field = clazz.getDeclaredField(fieldDefn.GetName().toLowerCase());
|
field.setAccessible(true);
|
|
map.put(i, field);
|
} catch (Exception e) {
|
//
|
}
|
}
|
} catch (Exception ex) {
|
//
|
}
|
|
return map;
|
}
|
|
/**
|
* 读取Feature
|
*/
|
private static <T> boolean readFeature(T t, Feature f, Map<Integer, Field> map, Field gField) {
|
try {
|
for (Integer i : map.keySet()) {
|
Field field = map.get(i);
|
setValue(t, f, field, i);
|
}
|
|
if (null != gField) {
|
setGeom(t, f, gField);
|
}
|
|
return true;
|
} catch (Exception ex) {
|
return false;
|
}
|
}
|
|
/**
|
* 设置值
|
*/
|
private static <T> void setValue(T t, Feature f, Field field, Integer i) throws Exception {
|
switch (field.getType().toString()) {
|
case "java.math.BigDecimal":
|
case "java.lang.Double":
|
case "double":
|
field.set(t, f.GetFieldAsDouble(i));
|
break;
|
case "java.lang.Long":
|
case "long":
|
field.set(t, f.GetFieldAsInteger64(i));
|
break;
|
case "java.lang.Integer":
|
case "int":
|
field.set(t, f.GetFieldAsInteger(i));
|
break;
|
case "java.sql.Timestamp":
|
field.set(t, GdalHelper.getProperty(f, i));
|
break;
|
default:
|
field.set(t, f.GetFieldAsString(i));
|
break;
|
}
|
}
|
|
/**
|
* 设置 geom 字段值
|
*/
|
private static <T> void setGeom(T t, Feature f, Field gField) throws Exception {
|
Geometry geometry = f.GetGeometryRef();
|
if (null != geometry) {
|
gField.set(t, geometry.ExportToWkt());
|
}
|
}
|
}
|
