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//---------------------------------------------------------------------
// <copyright file="ObjectStateEntryDbDataRecord.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
using System;
using System.Data;
using System.Data.Common;
using System.ComponentModel;
using System.Data.Metadata.Edm;
using System.Diagnostics;
namespace System.Data.Objects
{
internal sealed class ObjectStateEntryDbDataRecord : DbDataRecord, IExtendedDataRecord
{
private readonly StateManagerTypeMetadata _metadata;
private readonly ObjectStateEntry _cacheEntry;
private readonly object _userObject;
private DataRecordInfo _recordInfo;
internal ObjectStateEntryDbDataRecord(EntityEntry cacheEntry, StateManagerTypeMetadata metadata, object userObject)
{
EntityUtil.CheckArgumentNull(cacheEntry, "cacheEntry");
EntityUtil.CheckArgumentNull(userObject, "userObject");
EntityUtil.CheckArgumentNull(metadata, "metadata");
Debug.Assert(!cacheEntry.IsKeyEntry, "Cannot create an ObjectStateEntryDbDataRecord for a key entry");
switch (cacheEntry.State)
{
case EntityState.Unchanged:
case EntityState.Modified:
case EntityState.Deleted:
_cacheEntry = cacheEntry;
_userObject = userObject;
_metadata = metadata;
break;
default:
Debug.Assert(false, "A DbDataRecord cannot be created for an entity object that is in an added or detached state.");
break;
}
}
internal ObjectStateEntryDbDataRecord(RelationshipEntry cacheEntry)
{
EntityUtil.CheckArgumentNull(cacheEntry, "cacheEntry");
Debug.Assert(!cacheEntry.IsKeyEntry, "Cannot create an ObjectStateEntryDbDataRecord for a key entry");
switch (cacheEntry.State)
{
case EntityState.Unchanged:
case EntityState.Modified:
case EntityState.Deleted:
_cacheEntry = cacheEntry;
break;
default:
Debug.Assert(false, "A DbDataRecord cannot be created for an entity object that is in an added or detached state.");
break;
}
}
override public int FieldCount
{
get
{
Debug.Assert(_cacheEntry != null, "CacheEntry is required.");
return _cacheEntry.GetFieldCount(_metadata);
}
}
override public object this[int ordinal]
{
get
{
return GetValue(ordinal);
}
}
override public object this[string name]
{
get
{
return GetValue(GetOrdinal(name));
}
}
override public bool GetBoolean(int ordinal)
{
return (bool)GetValue(ordinal);
}
override public byte GetByte(int ordinal)
{
return (byte)GetValue(ordinal);
}
override public long GetBytes(int ordinal, long dataIndex, byte[] buffer, int bufferIndex, int length)
{
byte[] tempBuffer;
tempBuffer = (byte[])GetValue(ordinal);
if (buffer == null)
{
return tempBuffer.Length;
}
int srcIndex = (int)dataIndex;
int byteCount = Math.Min(tempBuffer.Length - srcIndex, length);
if (srcIndex < 0)
{
throw EntityUtil.InvalidSourceBufferIndex(tempBuffer.Length, srcIndex, "dataIndex");
}
else if ((bufferIndex < 0) || (bufferIndex > 0 && bufferIndex >= buffer.Length))
{
throw EntityUtil.InvalidDestinationBufferIndex(buffer.Length, bufferIndex, "bufferIndex");
}
if (0 < byteCount)
{
Array.Copy(tempBuffer, dataIndex, buffer, bufferIndex, byteCount);
}
else if (length < 0)
{
throw EntityUtil.InvalidDataLength(length);
}
else
{
byteCount = 0;
}
return byteCount;
}
override public char GetChar(int ordinal)
{
return (char)GetValue(ordinal);
}
override public long GetChars(int ordinal, long dataIndex, char[] buffer, int bufferIndex, int length)
{
char[] tempBuffer;
tempBuffer = (char[])GetValue(ordinal);
if (buffer == null)
{
return tempBuffer.Length;
}
int srcIndex = (int)dataIndex;
int charCount = Math.Min(tempBuffer.Length - srcIndex, length);
if (srcIndex < 0)
{
throw EntityUtil.InvalidSourceBufferIndex(buffer.Length, bufferIndex, "bufferIndex");
}
else if ((bufferIndex < 0) || (bufferIndex > 0 && bufferIndex >= buffer.Length))
{
throw EntityUtil.InvalidDestinationBufferIndex(buffer.Length, bufferIndex, "bufferIndex");
}
if (0 < charCount)
{
Array.Copy(tempBuffer, dataIndex, buffer, bufferIndex, charCount);
}
else if (length < 0)
{
throw EntityUtil.InvalidDataLength(length);
}
else
{
charCount = 0;
}
return charCount;
}
override protected DbDataReader GetDbDataReader(int ordinal)
{
throw EntityUtil.NotSupported();
}
override public string GetDataTypeName(int ordinal)
{
return (GetFieldType(ordinal)).Name;
}
override public DateTime GetDateTime(int ordinal)
{
return (DateTime)GetValue(ordinal);
}
override public Decimal GetDecimal(int ordinal)
{
return (Decimal)GetValue(ordinal);
}
override public double GetDouble(int ordinal)
{
return (Double)GetValue(ordinal);
}
public override Type GetFieldType(int ordinal)
{
return _cacheEntry.GetFieldType(ordinal, _metadata);
}
override public float GetFloat(int ordinal)
{
return (float)GetValue(ordinal);
}
override public Guid GetGuid(int ordinal)
{
return (Guid)GetValue(ordinal);
}
override public Int16 GetInt16(int ordinal)
{
return (Int16)GetValue(ordinal);
}
override public Int32 GetInt32(int ordinal)
{
return (Int32)GetValue(ordinal);
}
override public Int64 GetInt64(int ordinal)
{
return (Int64)GetValue(ordinal);
}
override public string GetName(int ordinal)
{
return _cacheEntry.GetCLayerName(ordinal, _metadata);
}
override public int GetOrdinal(string name)
{
int ordinal = _cacheEntry.GetOrdinalforCLayerName(name, _metadata);
if (ordinal == -1)
{
throw EntityUtil.ArgumentOutOfRange("name");
}
return ordinal;
}
override public string GetString(int ordinal)
{
return (string)GetValue(ordinal);
}
override public object GetValue(int ordinal)
{
if (_cacheEntry.IsRelationship)
{
return (_cacheEntry as RelationshipEntry).GetOriginalRelationValue(ordinal);
}
else
{
return (_cacheEntry as EntityEntry).GetOriginalEntityValue(_metadata, ordinal, _userObject, ObjectStateValueRecord.OriginalReadonly);
}
}
override public int GetValues(object[] values)
{
if (values == null)
{
throw EntityUtil.ArgumentNull("values");
}
int minValue = Math.Min(values.Length, FieldCount);
for (int i = 0; i < minValue; i++)
{
values[i] = GetValue(i);
}
return minValue;
}
override public bool IsDBNull(int ordinal)
{
return (GetValue(ordinal) == DBNull.Value);
}
public DataRecordInfo DataRecordInfo
{
get
{
if (null == _recordInfo)
{
Debug.Assert(_cacheEntry != null, "CacheEntry is required.");
_recordInfo = _cacheEntry.GetDataRecordInfo(_metadata, _userObject);
}
return _recordInfo;
}
}
public DbDataRecord GetDataRecord(int ordinal)
{
return (DbDataRecord)GetValue(ordinal);
}
public DbDataReader GetDataReader(int i)
{
return this.GetDbDataReader(i);
}
}
}
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