/// <summary>
/// 读取指定行列号的数据
/// </summary>
/// <param name="level"></param>
/// <param name="row"></param>
/// <param name="col"></param>
/// <returns></returns>
public Byte[] Read(int level, int row, int col)
{
string bundleFilePath = GetBundleFileWithouExtention(level, row, col);
// 打开对应的索引文件
EsriBundleIndexFile indexFile = new EsriBundleIndexFile(bundleFilePath + EsriBundleFileConfig.BundleIndexExt);
indexFile.Intiliaze();
// 读取所有索引
var bundleIndices = indexFile.GetAllIndices();
// 读取数据文件
EsriBundleFile dataFile = new EsriBundleFile(bundleFilePath + EsriBundleFileConfig.BundleExt, bundleIndices);
dataFile.Intiliaze();
int index;
EsriBundleHelper.ComputeIndex(row, col, PacketSize, out index);
var tileBytes = dataFile.Read(index);
indexFile.Dispose();
dataFile.Dispose();
return tileBytes;
}
static void CreateDataFileTest()
{
var oldIndexPath = @"d:\esri\R1300C6980.bundlx";
var oldDataPath = @"d:\esri\R1300C6980.bundle";
var newDataPath = @"d:\esri\R1300C6980new.bundle";
EsriBundleIndexFile oldIndexFile = new EsriBundleIndexFile(oldIndexPath);
oldIndexFile.Intiliaze();
var allOldStorageIndices = oldIndexFile.GetAllIndices();
EsriBundleFile oldDataFile = new EsriBundleFile(oldDataPath, allOldStorageIndices);
oldDataFile.Intiliaze();
EsriBundleFile newDataFile = new EsriBundleFile(oldDataFile.Config);
newDataFile.Intiliaze();
for (int i = 0; i < 16384; i++)
{
var dataBytes = oldDataFile.Read(i);
newDataFile.Write(i, dataBytes);
}
newDataFile.SaveAs(newDataPath);
}
/// <summary>
/// 写入指定行列号的瓦片数据，由于需要频繁打开文件然后复制，最好使用批量写入的方式
/// </summary>
/// <param name="level"></param>
/// <param name="row"></param>
/// <param name="col"></param>
/// <param name="tilebytes"></param>
public void Write(int level, int row, int col, Byte[] tilebytes)
{
string bundleFilePath = GetBundleFileWithouExtention(level, row, col);
// 将旧文件的数据首先读到新文件中,插入新的数据会造成整个文件数据的移动，因而这里采用全部读取出来，然后重新写入的方式
EsriBundleFile oldDataFile = new EsriBundleFile(bundleFilePath + EsriBundleFileConfig.BundleExt);
oldDataFile.Intiliaze();
var newDataFile = new EsriBundleFile(oldDataFile.Config);
newDataFile.Intiliaze();
for (int i = 0; i < EsriBundleFileConfig.MaxTileCount; i++)
{
var dataBytes = oldDataFile.Read(i);
newDataFile.Write(i, dataBytes);
}
oldDataFile.Dispose();
oldDataFile = null;
int index;
EsriBundleHelper.ComputeIndex(row, col, PacketSize, out index);
newDataFile.Write(index, tilebytes);
newDataFile.SaveAs(bundleFilePath + EsriBundleFileConfig.BundleExt);
newDataFile.Dispose();
}
/// <summary>
/// 批量写入瓦片，此方法会缓存新创建的文件
/// </summary>
/// <param name="tileDatalist"></param>
public void Write(IEnumerable<TileData> tileDatalist)
{
/// 已经打开的文件字典，避免频繁打开文件
Dictionary<string, EsriBundleFile> newFileDict = new Dictionary<string, EsriBundleFile>();
foreach (var tileData in tileDatalist)
{
int level = tileData.Level;
int row = tileData.Row;
int col = tileData.Col;
string bundleFilePath = GetBundleFileWithouExtention(level, row, col);
// 尝试打开文件
EsriBundleFile newDataFile;
// 查看是否在已经打开的文件里
if (newFileDict.ContainsKey(bundleFilePath))
{
newDataFile = newFileDict[bundleFilePath];
}
else
{
// 将旧文件的数据首先读到新文件中,插入新的数据会造成整个文件数据的移动，因而这里采用全部读取出来，然后重新写入的方式
EsriBundleFile oldDataFile = new EsriBundleFile(bundleFilePath + EsriBundleFileConfig.BundleExt);
oldDataFile.Intiliaze();
newDataFile = new EsriBundleFile(oldDataFile.Config);
newDataFile.Intiliaze();
for (int i = 0; i < EsriBundleFileConfig.MaxTileCount; i++)
{
var dataBytes = oldDataFile.Read(i);
newDataFile.Write(i, dataBytes);
}
oldDataFile.Dispose();
oldDataFile = null;
newFileDict.Add(bundleFilePath, newDataFile);
}
// 替换旧数据
int index;
EsriBundleHelper.ComputeIndex(row, col, PacketSize, out index);
newDataFile.Write(index, tileData.Data);
}
// 依次保存数据
foreach (var newfilePair in newFileDict)
{
var newfile = newfilePair.Value;
newfile.SaveAs(newfilePair.Key + EsriBundleFileConfig.BundleExt);
newfile.Dispose();
newfile = null;
}
}
static void ReadTest()
{
var oldIndexPath = @"d:\esri\R0000C0000.bundlx";
var oldDataPath = @"d:\esri\R0000C0000.bundle";
EsriBundleIndexFile oldIndexFile = new EsriBundleIndexFile(oldIndexPath);
oldIndexFile.Intiliaze();
var allOldStorageIndices = oldIndexFile.GetAllIndices();
EsriBundleFile oldDataFile = new EsriBundleFile(oldDataPath, allOldStorageIndices);
oldDataFile.Intiliaze();
for (int i = 0; i < 16384; i++)
{
var dataBytes = oldDataFile.Read(i);
if (dataBytes != null)
{
var indexx = allOldStorageIndices[i];
}
}
}
static void OutputDataFileTest()
{
var oldIndexPath = @"d:\esri\R1300C6980new.bundlx";
var oldDataPath = @"d:\esri\R1300C6980new.bundle";
//EsriBundleIndexFile oldIndexFile = new EsriBundleIndexFile(oldIndexPath);
//oldIndexFile.Intiliaze();
EsriBundleFile oldDataFile = new EsriBundleFile(oldDataPath);
oldDataFile.Intiliaze();
for (int i = 0; i < 16384; i++)
{
var dataBytes = oldDataFile.Read(i);
if (dataBytes != null)
File.WriteAllBytes(Path.Combine(@"d:\esri\R1300C6980new\", i + ".jpg"), dataBytes);
}
}
