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//------------------------------------------------------------------------------
// <copyright file="DataTableMapping.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Data.Common {
using System;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Data;
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
[
System.ComponentModel.TypeConverterAttribute(typeof(System.Data.Common.DataTableMapping.DataTableMappingConverter))
]
public sealed class DataTableMapping : MarshalByRefObject, ITableMapping, ICloneable {
private DataTableMappingCollection parent;
private DataColumnMappingCollection _columnMappings;
private string _dataSetTableName;
private string _sourceTableName;
public DataTableMapping() {
}
public DataTableMapping(string sourceTable, string dataSetTable) {
SourceTable = sourceTable;
DataSetTable = dataSetTable;
}
public DataTableMapping(string sourceTable, string dataSetTable, DataColumnMapping[] columnMappings) {
SourceTable = sourceTable;
DataSetTable = dataSetTable;
if ((null != columnMappings) && (0 < columnMappings.Length)) {
ColumnMappings.AddRange(columnMappings);
}
}
// explict ITableMapping implementation
IColumnMappingCollection ITableMapping.ColumnMappings {
get { return ColumnMappings; }
}
[
DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
ResCategoryAttribute(Res.DataCategory_Mapping),
ResDescriptionAttribute(Res.DataTableMapping_ColumnMappings),
]
public DataColumnMappingCollection ColumnMappings {
get {
DataColumnMappingCollection columnMappings = _columnMappings;
if (null == columnMappings) {
columnMappings = new DataColumnMappingCollection();
_columnMappings = columnMappings;
}
return columnMappings;
}
}
[
DefaultValue(""),
ResCategoryAttribute(Res.DataCategory_Mapping),
ResDescriptionAttribute(Res.DataTableMapping_DataSetTable),
]
public string DataSetTable {
get {
string dataSetTableName = _dataSetTableName;
return ((null != dataSetTableName) ? dataSetTableName : ADP.StrEmpty);
}
set {
_dataSetTableName = value;
}
}
internal DataTableMappingCollection Parent {
get {
return parent;
}
set {
parent = value;
}
}
[
DefaultValue(""),
ResCategoryAttribute(Res.DataCategory_Mapping),
ResDescriptionAttribute(Res.DataTableMapping_SourceTable),
]
public string SourceTable {
get {
string sourceTableName = _sourceTableName;
return ((null != sourceTableName) ? sourceTableName : ADP.StrEmpty);
}
set {
if ((null != Parent) && (0 != ADP.SrcCompare(_sourceTableName, value))) {
Parent.ValidateSourceTable(-1, value);
}
_sourceTableName = value;
}
}
object ICloneable.Clone() {
DataTableMapping clone = new DataTableMapping(); // MDAC 81448
clone._dataSetTableName = _dataSetTableName;
clone._sourceTableName = _sourceTableName;
if ((null != _columnMappings) && (0 < ColumnMappings.Count)) {
DataColumnMappingCollection parameters = clone.ColumnMappings;
foreach(ICloneable parameter in ColumnMappings) {
parameters.Add(parameter.Clone());
}
}
return clone;
}
[ EditorBrowsableAttribute(EditorBrowsableState.Advanced) ] // MDAC 69508
public DataColumn GetDataColumn(string sourceColumn, Type dataType, DataTable dataTable, MissingMappingAction mappingAction, MissingSchemaAction schemaAction) {
return DataColumnMappingCollection.GetDataColumn(_columnMappings, sourceColumn, dataType, dataTable, mappingAction, schemaAction);
}
[ EditorBrowsableAttribute(EditorBrowsableState.Advanced) ] // MDAC 69508
public DataColumnMapping GetColumnMappingBySchemaAction(string sourceColumn, MissingMappingAction mappingAction) {
return DataColumnMappingCollection.GetColumnMappingBySchemaAction(_columnMappings, sourceColumn, mappingAction);
}
[ EditorBrowsableAttribute(EditorBrowsableState.Advanced) ] // MDAC 69508
public DataTable GetDataTableBySchemaAction(DataSet dataSet, MissingSchemaAction schemaAction) {
if (null == dataSet) {
throw ADP.ArgumentNull("dataSet");
}
string dataSetTable = DataSetTable;
if (ADP.IsEmpty(dataSetTable)) {
#if DEBUG
if (AdapterSwitches.DataSchema.TraceWarning) {
Debug.WriteLine("explicit filtering of SourceTable \"" + SourceTable + "\"");
}
#endif
return null;
}
DataTableCollection tables = dataSet.Tables;
int index = tables.IndexOf(dataSetTable);
if ((0 <= index) && (index < tables.Count)) {
#if DEBUG
if (AdapterSwitches.DataSchema.TraceInfo) {
Debug.WriteLine("schema match on DataTable \"" + dataSetTable);
}
#endif
return tables[index];
}
switch (schemaAction) {
case MissingSchemaAction.Add:
case MissingSchemaAction.AddWithKey:
#if DEBUG
if (AdapterSwitches.DataSchema.TraceInfo) {
Debug.WriteLine("schema add of DataTable \"" + dataSetTable + "\"");
}
#endif
return new DataTable(dataSetTable);
case MissingSchemaAction.Ignore:
#if DEBUG
if (AdapterSwitches.DataSchema.TraceWarning) {
Debug.WriteLine("schema filter of DataTable \"" + dataSetTable + "\"");
}
#endif
return null;
case MissingSchemaAction.Error:
#if DEBUG
if (AdapterSwitches.DataSchema.TraceError) {
Debug.WriteLine("schema error on DataTable \"" + dataSetTable + "\"");
}
#endif
throw ADP.MissingTableSchema(dataSetTable, SourceTable);
}
throw ADP.InvalidMissingSchemaAction(schemaAction);
}
public override String ToString() {
return SourceTable;
}
sealed internal class DataTableMappingConverter : System.ComponentModel.ExpandableObjectConverter {
// converter classes should have public ctor
public DataTableMappingConverter() {
}
override public bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
if (typeof(InstanceDescriptor) == destinationType) {
return true;
}
return base.CanConvertTo(context, destinationType);
}
override public object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
if (null == destinationType) {
throw ADP.ArgumentNull("destinationType");
}
if ((typeof(InstanceDescriptor) == destinationType) && (value is DataTableMapping)) {
DataTableMapping mapping = (DataTableMapping)value;
DataColumnMapping[] columnMappings = new DataColumnMapping[mapping.ColumnMappings.Count];
mapping.ColumnMappings.CopyTo(columnMappings, 0);
object[] values = new object[] { mapping.SourceTable, mapping.DataSetTable, columnMappings};
Type[] types = new Type[] { typeof(string), typeof(string), typeof(DataColumnMapping[]) };
ConstructorInfo ctor = typeof(DataTableMapping).GetConstructor(types);
return new InstanceDescriptor(ctor, values);
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
}
}
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