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Imported Upstream version 4.6.0.125

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Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4
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Xamarin Public Jenkins (auto-signing)
2016-08-03 10:59:49 +00:00
parent a569aebcfd
commit e79aa3c0ed
17047 changed files with 3137615 additions and 392334 deletions
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mcs/class/referencesource/System.Data/System/Data/OleDb/DBBindings.cs Normal file
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//------------------------------------------------------------------------------
// <copyright file="DBBindings.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">[....]</owner>
// <owner current="true" primary="false">[....]</owner>
//------------------------------------------------------------------------------
namespace System.Data.OleDb {
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Data;
using System.Data.Common;
using System.Globalization;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.Text;
using System.Threading;
sealed internal class Bindings {
private readonly tagDBPARAMBINDINFO[] _bindInfo;
private readonly tagDBBINDING[] _dbbindings;
private readonly tagDBCOLUMNACCESS[] _dbcolumns;
private OleDbParameter[] _parameters;
private int _collectionChangeID;
private OleDbDataReader _dataReader;
private ColumnBinding[] _columnBindings;
private RowBinding _rowBinding;
private int _index;
private int _count;
private int _dataBufferSize;
private bool _ifIRowsetElseIRow;
private bool _forceRebind;
private bool _needToReset;
private Bindings(int count) {
_count = count;
_dbbindings = new tagDBBINDING[count];
for(int i = 0;i < _dbbindings.Length;++i) {
_dbbindings[i] = new tagDBBINDING();
}
_dbcolumns = new tagDBCOLUMNACCESS[count];
}
internal Bindings(OleDbParameter[] parameters, int collectionChangeID) : this(parameters.Length) {
_bindInfo = new tagDBPARAMBINDINFO[parameters.Length];
_parameters = parameters;
_collectionChangeID = collectionChangeID;
_ifIRowsetElseIRow = true;
}
internal Bindings(OleDbDataReader dataReader, bool ifIRowsetElseIRow, int count) : this(count) {
_dataReader = dataReader;
_ifIRowsetElseIRow = ifIRowsetElseIRow;
}
internal tagDBPARAMBINDINFO[] BindInfo {
get { return _bindInfo; }
}
internal tagDBCOLUMNACCESS[] DBColumnAccess {
get { return _dbcolumns; }
}
internal int CurrentIndex {
//get { return _index; }
set {
Debug.Assert((0 <= value) && (value < _count), "bad binding index");
_index = value;
}
}
internal ColumnBinding[] ColumnBindings() {
Debug.Assert(null != _columnBindings, "null ColumnBindings");
return _columnBindings;
}
internal OleDbParameter[] Parameters() {
Debug.Assert(null != _parameters, "null Parameters");
return _parameters;
}
internal RowBinding RowBinding() {
//Debug.Assert(null != _rowBinding, "null RowBinding");
return _rowBinding;
}
internal bool ForceRebind {
get { return _forceRebind; }
set { _forceRebind = value; }
}
// tagDBPARAMBINDINFO member access
internal IntPtr DataSourceType {
//get { return _bindInfo[_index].pwszDataSourceType; }
set {
_bindInfo[_index].pwszDataSourceType = value;
}
}
internal IntPtr Name {
//get { return _bindInfo[_index].pwszName; }
set {
_bindInfo[_index].pwszName= value;
}
}
internal IntPtr ParamSize {
get {
if (null != _bindInfo) {
return _bindInfo[_index].ulParamSize;
}
return IntPtr.Zero;
}
set {
_bindInfo[_index].ulParamSize= value;
}
}
internal int Flags {
//get { return _bindInfo[_index].dwFlag; }
set {
_bindInfo[_index].dwFlags= value;
}
}
// tagDBBINDING member access
//
internal IntPtr Ordinal { // iOrdinal
//get { return _dbbindings[_index].iOrdinal.ToInt32(); }
set {
_dbbindings[_index].iOrdinal = value;
}
}
#if DEBUG
/*internal int ValueOffset { // obValue
get { return _dbbindings[_index].obValue.ToInt32(); }
}
internal int LengthOffset { // obLength
get { return _dbbindings[_index].obLength.ToInt32(); }
}
internal int StatusOffset { // obStatus
get { return _dbbindings[_index].obStatus.ToInt32(); }
}*/
#endif
internal int Part { // dwPart
#if DEBUG
//get { return _dbbindings[_index].dwPart; }
#endif
set { _dbbindings[_index].dwPart = value; }
}
internal int ParamIO { // eParamIO
#if DEBUG
//get { return _dbbindings[_index].eParamIO; }
#endif
set { _dbbindings[_index].eParamIO = value; }
}
internal int MaxLen { // cbMaxLen
//get { return (int) _dbbindings[_index].cbMaxLen; }
set {
Debug.Assert(0 <= value, "invalid MaxLen");
_dbbindings[_index].obStatus = (IntPtr) (_dataBufferSize + 0);
_dbbindings[_index].obLength = (IntPtr) (_dataBufferSize + ADP.PtrSize);
_dbbindings[_index].obValue = (IntPtr) (_dataBufferSize + ADP.PtrSize + ADP.PtrSize);
_dataBufferSize += ADP.PtrSize + ADP.PtrSize;
switch(DbType) {
case (NativeDBType.BSTR): // ADP.PtrSize
case (NativeDBType.HCHAPTER): // ADP.PtrSize
case (NativeDBType.PROPVARIANT): // sizeof(PROPVARIANT)
case (NativeDBType.VARIANT): // 16 or 24 (8 + ADP.PtrSize *2)
case (NativeDBType.BYREF | NativeDBType.BYTES): // ADP.PtrSize
case (NativeDBType.BYREF | NativeDBType.WSTR): // ADP.PtrSize
// allocate extra space to cache original value for disposal
_dataBufferSize += System.Data.OleDb.RowBinding.AlignDataSize(value*2);
_needToReset = true;
break;
default:
_dataBufferSize += System.Data.OleDb.RowBinding.AlignDataSize(value);
break;
}
_dbbindings[_index].cbMaxLen = (IntPtr)value;
_dbcolumns[_index].cbMaxLen = (IntPtr)value;
}
}
internal int DbType { // wType
get { return _dbbindings[_index].wType; }
set {
_dbbindings[_index].wType = (short) value;
_dbcolumns[_index].wType = (short) value;
}
}
internal byte Precision { // bPrecision
#if DEBUG
//get { return _dbbindings[_index].bPrecision; }
#endif
set {
if (null != _bindInfo) {
_bindInfo[_index].bPrecision = value;
}
_dbbindings[_index].bPrecision = value;
_dbcolumns[_index].bPrecision = value;
}
}
internal byte Scale { // bScale
#if DEBUG
//get { return _dbbindings[_index].bScale; }
#endif
set {
if (null != _bindInfo) {
_bindInfo[_index].bScale = value;
}
_dbbindings[_index].bScale = value;
_dbcolumns[_index].bScale = value;
}
}
internal int AllocateForAccessor(OleDbDataReader dataReader, int indexStart, int indexForAccessor) {
Debug.Assert(null == _rowBinding, "row binding already allocated");
Debug.Assert(null == _columnBindings, "column bindings already allocated");
RowBinding rowBinding = System.Data.OleDb.RowBinding.CreateBuffer(_count, _dataBufferSize, _needToReset);
_rowBinding = rowBinding;
ColumnBinding[] columnBindings = rowBinding.SetBindings(dataReader, this, indexStart, indexForAccessor, _parameters, _dbbindings, _ifIRowsetElseIRow);
Debug.Assert(null != columnBindings, "null column bindings");
_columnBindings = columnBindings;
if (!_ifIRowsetElseIRow) {
Debug.Assert(columnBindings.Length == _dbcolumns.Length, "length mismatch");
for(int i = 0; i < columnBindings.Length; ++i) { // WebData 94427
_dbcolumns[i].pData = rowBinding.DangerousGetDataPtr(columnBindings[i].ValueOffset); // We are simply pointing at a location later in the buffer, so we're OK to not addref the buffer.
}
}
#if DEBUG
int index = -1;
foreach(ColumnBinding binding in columnBindings) {
Debug.Assert(index < binding.Index, "invaild index");
index = binding.Index;
}
#endif
return (indexStart + columnBindings.Length);
}
internal void ApplyInputParameters() {
ColumnBinding[] columnBindings = this.ColumnBindings();
OleDbParameter[] parameters = this.Parameters();
RowBinding().StartDataBlock();
for(int i = 0; i < parameters.Length; ++i) {
if (ADP.IsDirection(parameters[i], ParameterDirection.Input)) {
columnBindings[i].SetOffset(parameters[i].Offset); // MDAC 80657
columnBindings[i].Value(parameters[i].GetCoercedValue());
}
else {
// always set ouput only and return value parameter values to null when executing
parameters[i].Value = null;
//columnBindings[i].SetValueEmpty(); // webdata 115079
}
}
}
internal void ApplyOutputParameters() {
ColumnBinding[] columnBindings = this.ColumnBindings();
OleDbParameter[] parameters = this.Parameters();
for(int i = 0; i < parameters.Length; ++i) {
if (ADP.IsDirection(parameters[i], ParameterDirection.Output)) {
parameters[i].Value = columnBindings[i].Value();
}
}
CleanupBindings();
}
internal bool AreParameterBindingsInvalid(OleDbParameterCollection collection) {
Debug.Assert(null != collection, "null parameter collection");
Debug.Assert(null != _parameters, "null parameters");
ColumnBinding[] columnBindings = this.ColumnBindings();
if (!ForceRebind && ((collection.ChangeID == _collectionChangeID) && (_parameters.Length == collection.Count))) {
for(int i = 0; i < columnBindings.Length; ++i) {
ColumnBinding binding = columnBindings[i];
Debug.Assert(null != binding, "null column binding");
Debug.Assert(binding.Parameter() == _parameters[i], "parameter mismatch");
if (binding.IsParameterBindingInvalid(collection[i])) {
//Debug.WriteLine("ParameterBindingsInvalid");
return true;
}
}
//Debug.WriteLine("ParameterBindingsValid");
return false; // collection and cached values are the same
}
//Debug.WriteLine("ParameterBindingsInvalid");
return true;
}
internal void CleanupBindings() {
RowBinding rowBinding = this.RowBinding();
if (null != rowBinding) {
rowBinding.ResetValues();
ColumnBinding[] columnBindings = this.ColumnBindings();
for(int i = 0; i < columnBindings.Length; ++i) {
ColumnBinding binding = columnBindings[i];
if (null != binding) {
binding.ResetValue();
}
}
}
}
internal void CloseFromConnection() {
if (null != _rowBinding) {
_rowBinding.CloseFromConnection();
}
Dispose();
}
internal OleDbHResult CreateAccessor(UnsafeNativeMethods.IAccessor iaccessor, int flags) {
Debug.Assert(null != _rowBinding, "no row binding");
Debug.Assert(null != _columnBindings, "no column bindings");
return _rowBinding.CreateAccessor(iaccessor, flags, _columnBindings);
}
public void Dispose() {
_parameters = null;
_dataReader = null;
_columnBindings = null;
RowBinding rowBinding = _rowBinding;
_rowBinding = null;
if (null != rowBinding) {
rowBinding.Dispose();
}
}
internal void GuidKindName(Guid guid, int eKind, IntPtr propid) {
tagDBCOLUMNACCESS[] dbcolumns = DBColumnAccess;
dbcolumns[_index].columnid.uGuid = guid;
dbcolumns[_index].columnid.eKind = eKind;
dbcolumns[_index].columnid.ulPropid = propid;
}
internal void ParameterStatus(StringBuilder builder) {
ColumnBinding[] columnBindings = ColumnBindings();
for(int i = 0; i < columnBindings.Length; ++i) {
ODB.CommandParameterStatus(builder, i, columnBindings[i].StatusValue());
}
}
}
}