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//---------------------------------------------------------------------
// <copyright file="DbParameterHelper.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
namespace System.Data.EntityClient {
using System;
using System.ComponentModel;
using System.Data;
using System.Data.Common;
using System.Data.Entity;
public sealed partial class EntityParameter : DbParameter {
private object _value;
private object _parent;
private ParameterDirection _direction;
private int? _size;
private string _sourceColumn;
private DataRowVersion _sourceVersion;
private bool _sourceColumnNullMapping;
private bool? _isNullable;
private object _coercedValue;
private EntityParameter(EntityParameter source) : this() {
EntityUtil.CheckArgumentNull(source, "source");
source.CloneHelper(this);
ICloneable cloneable = (_value as ICloneable);
if (null != cloneable) {
_value = cloneable.Clone();
}
}
private object CoercedValue {
get {
return _coercedValue;
}
set {
_coercedValue = value;
}
}
[
RefreshProperties(RefreshProperties.All),
EntityResCategoryAttribute(EntityRes.DataCategory_Data),
EntityResDescriptionAttribute(EntityRes.DbParameter_Direction),
]
override public ParameterDirection Direction {
get {
ParameterDirection direction = _direction;
return ((0 != direction) ? direction : ParameterDirection.Input);
}
set {
if (_direction != value) {
switch (value) {
case ParameterDirection.Input:
case ParameterDirection.Output:
case ParameterDirection.InputOutput:
case ParameterDirection.ReturnValue:
PropertyChanging();
_direction = value;
break;
default:
throw EntityUtil.InvalidParameterDirection(value);
}
}
}
}
override public bool IsNullable {
get {
bool result = this._isNullable.HasValue ? this._isNullable.Value : true;
return result;
}
set {
_isNullable = value;
}
}
internal int Offset {
get {
return 0;
}
}
[
EntityResCategoryAttribute(EntityRes.DataCategory_Data),
EntityResDescriptionAttribute(EntityRes.DbParameter_Size),
]
override public int Size {
get {
int size = _size.HasValue ? _size.Value : 0;
if (0 == size) {
size = ValueSize(Value);
}
return size;
}
set {
if (!_size.HasValue || _size.Value != value) {
if (value < -1) {
throw EntityUtil.InvalidSizeValue(value);
}
PropertyChanging();
if (0 == value) {
_size = null;
}
else {
_size = value;
}
}
}
}
private void ResetSize() {
if (_size.HasValue) {
PropertyChanging();
_size = null;
}
}
private bool ShouldSerializeSize() {
return (_size.HasValue && _size.Value != 0);
}
[
EntityResCategoryAttribute(EntityRes.DataCategory_Update),
EntityResDescriptionAttribute(EntityRes.DbParameter_SourceColumn),
]
override public string SourceColumn {
get {
string sourceColumn = _sourceColumn;
return ((null != sourceColumn) ? sourceColumn : string.Empty);
}
set {
_sourceColumn = value;
}
}
public override bool SourceColumnNullMapping {
get {
return _sourceColumnNullMapping;
}
set {
_sourceColumnNullMapping = value;
}
}
[
EntityResCategoryAttribute(EntityRes.DataCategory_Update),
EntityResDescriptionAttribute(EntityRes.DbParameter_SourceVersion),
]
override public DataRowVersion SourceVersion {
get {
DataRowVersion sourceVersion = _sourceVersion;
return ((0 != sourceVersion) ? sourceVersion : DataRowVersion.Current);
}
set {
switch(value) {
case DataRowVersion.Original:
case DataRowVersion.Current:
case DataRowVersion.Proposed:
case DataRowVersion.Default:
_sourceVersion = value;
break;
default:
throw EntityUtil.InvalidDataRowVersion(value);
}
}
}
private void CloneHelperCore(EntityParameter destination) {
destination._value = _value;
destination._direction = _direction;
destination._size = _size;
destination._sourceColumn = _sourceColumn;
destination._sourceVersion = _sourceVersion;
destination._sourceColumnNullMapping = _sourceColumnNullMapping;
destination._isNullable = _isNullable;
}
internal void CopyTo(DbParameter destination) {
EntityUtil.CheckArgumentNull(destination, "destination");
CloneHelper((EntityParameter)destination);
}
internal object CompareExchangeParent(object value, object comparand) {
object parent = _parent;
if (comparand == parent) {
_parent = value;
}
return parent;
}
internal void ResetParent() {
_parent = null;
}
override public string ToString() {
return ParameterName;
}
private byte ValuePrecisionCore(object value) {
if (value is Decimal) {
return ((System.Data.SqlTypes.SqlDecimal)(Decimal) value).Precision;
}
return 0;
}
private byte ValueScaleCore(object value) {
if (value is Decimal) {
return (byte)((Decimal.GetBits((Decimal)value)[3] & 0x00ff0000) >> 0x10);
}
return 0;
}
private int ValueSizeCore(object value) {
if (!EntityUtil.IsNull(value)) {
string svalue = (value as string);
if (null != svalue) {
return svalue.Length;
}
byte[] bvalue = (value as byte[]);
if (null != bvalue) {
return bvalue.Length;
}
char[] cvalue = (value as char[]);
if (null != cvalue) {
return cvalue.Length;
}
if ((value is byte) || (value is char)) {
return 1;
}
}
return 0;
}
}
}
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