Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/System/Data/Common/DBSchemaRow.cs

@@ -0,0 +1,395 @@
+//------------------------------------------------------------------------------
+// <copyright file="DBSchemaRow.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.Common {
+
+    using System;
+    using System.ComponentModel;
+    using System.Data;
+    using System.Diagnostics;
+    using System.Globalization;
+
+    sealed internal class DbSchemaRow {
+        internal const string SchemaMappingUnsortedIndex = "SchemaMapping Unsorted Index";    
+        DbSchemaTable schemaTable;
+        DataRow dataRow;
+
+        static internal DbSchemaRow[] GetSortedSchemaRows(DataTable dataTable, bool returnProviderSpecificTypes) { // MDAC 60609
+            DataColumn sortindex= dataTable.Columns[SchemaMappingUnsortedIndex];
+            if (null == sortindex) { // WebData 100390
+                sortindex = new DataColumn(SchemaMappingUnsortedIndex, typeof(Int32)); // MDAC 67050
+                dataTable.Columns.Add(sortindex);
+            }
+            int count = dataTable.Rows.Count;
+            for (int i = 0; i < count; ++i) {
+                dataTable.Rows[i][sortindex] = i;
+            };
+            DbSchemaTable schemaTable = new DbSchemaTable(dataTable, returnProviderSpecificTypes);
+
+            const DataViewRowState rowStates = DataViewRowState.Unchanged | DataViewRowState.Added | DataViewRowState.ModifiedCurrent;
+            DataRow[] dataRows = dataTable.Select(null, "ColumnOrdinal ASC", rowStates);
+            Debug.Assert(null != dataRows, "GetSchemaRows: unexpected null dataRows");
+
+            DbSchemaRow[] schemaRows = new DbSchemaRow[dataRows.Length];
+
+            for (int i = 0; i < dataRows.Length; ++i) {
+                schemaRows[i] = new DbSchemaRow(schemaTable, dataRows[i]);
+            }
+            return schemaRows;
+        }
+
+        internal DbSchemaRow(DbSchemaTable schemaTable, DataRow dataRow) {
+            this.schemaTable = schemaTable;
+            this.dataRow = dataRow;
+        }
+
+        internal DataRow DataRow {
+            get {
+                return dataRow;
+            }
+        }
+
+        internal string ColumnName {
+            get {
+                Debug.Assert(null != schemaTable.ColumnName, "no column ColumnName");
+                object value = dataRow[schemaTable.ColumnName, DataRowVersion.Default];
+                if (!Convert.IsDBNull(value)) {
+                    return Convert.ToString(value, CultureInfo.InvariantCulture);
+                }
+                return "";
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.ColumnName, "missing column ColumnName");
+                dataRow[schemaTable.ColumnName] = value;
+            }*/
+        }
+
+        //internal Int32 Ordinal {
+            /*get {
+                Debug.Assert(null != schemaTable.Ordinal, "no column Ordinal");
+                return Convert.ToInt32(dataRow[schemaTable.Ordinal, DataRowVersion.Default], CultureInfo.InvariantCulture);
+            }*/
+            /*set {
+                Debug.Assert(null != schemaTable.Ordinal, "missing column Ordinal");
+                dataRow[schemaTable.Ordinal] = value;
+            }*/
+
+        //}
+
+        internal Int32 Size {
+            get {
+                Debug.Assert(null != schemaTable.Size, "no column Size");
+                object value = dataRow[schemaTable.Size, DataRowVersion.Default];
+                if (!Convert.IsDBNull(value)) {
+                    return Convert.ToInt32(value, CultureInfo.InvariantCulture);
+                }
+                return 0;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.Size, "missing column Size");
+                dataRow[schemaTable.Size] = value;
+            }*/
+        }
+
+        internal string BaseColumnName {
+            get {
+                if (null != schemaTable.BaseColumnName) {
+                    object value = dataRow[schemaTable.BaseColumnName, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToString(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return "";
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.BaseColumnName, "missing column BaseColumnName");
+                dataRow[schemaTable.BaseColumnName] = value;
+            }*/
+        }
+
+        internal string BaseServerName {
+            get {
+                if (null != schemaTable.BaseServerName) {
+                    object value = dataRow[schemaTable.BaseServerName, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToString(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return "";
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.BaseServerName, "missing column BaseServerName");
+                dataRow[schemaTable.BaseServerName] = value;
+            }*/
+        }
+
+
+        internal string BaseCatalogName {
+            get {
+                if (null != schemaTable.BaseCatalogName) {
+                    object value = dataRow[schemaTable.BaseCatalogName, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToString(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return "";
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.BaseCatalogName, "missing column BaseCatalogName");
+                dataRow[schemaTable.BaseCatalogName] = value;
+            }*/
+        }
+
+        internal string BaseSchemaName {
+            get {
+                if (null != schemaTable.BaseSchemaName) {
+                    object value = dataRow[schemaTable.BaseSchemaName, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToString(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return "";
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.BaseSchemaName, "missing column BaseSchemaName");
+                dataRow[schemaTable.BaseSchemaName] = value;
+            }*/
+        }
+
+        internal string BaseTableName {
+            get {
+                if (null != schemaTable.BaseTableName) {
+                    object value = dataRow[schemaTable.BaseTableName, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToString(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return "";
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.BaseTableName, "missing column BaseTableName");
+                dataRow[schemaTable.BaseTableName] = value;
+            }*/
+        }
+
+        internal bool IsAutoIncrement {
+            get {
+                if (null != schemaTable.IsAutoIncrement) {
+                    object value = dataRow[schemaTable.IsAutoIncrement, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.IsAutoIncrement, "missing column IsAutoIncrement");
+                dataRow[schemaTable.IsAutoIncrement] = (bool)value;
+            }*/
+        }
+
+        internal bool IsUnique {
+            get {
+                if (null != schemaTable.IsUnique) {
+                    object value = dataRow[schemaTable.IsUnique, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.IsUnique, "missing column IsUnique");
+                dataRow[schemaTable.IsUnique] = (bool)value;
+            }*/
+        }
+
+        internal bool IsRowVersion {
+            get {
+                if (null != schemaTable.IsRowVersion) {
+                    object value = dataRow[schemaTable.IsRowVersion, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.IsRowVersion, "missing column IsRowVersion");
+                dataRow[schemaTable.IsRowVersion] = value;
+            }*/
+        }
+
+        internal bool IsKey {
+            get {
+                if (null != schemaTable.IsKey) {
+                    object value = dataRow[schemaTable.IsKey, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.IsKey, "missing column IsKey");
+                dataRow[schemaTable.IsKey] = value;
+            }*/
+        }
+
+        // consider:  just do comparison directly -> (object)(baseColumnName) == (object)(columnName)
+        //internal bool IsAliased {
+            /*get {
+                if (null != schemaTable.IsAliased) { // MDAC 62336
+                    object value = dataRow[schemaTable.IsAliased, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }*/
+            /*set {
+                Debug.Assert(null != schemaTable.IsAliased, "missing column IsAliased");
+                dataRow[schemaTable.IsAliased] = value;
+            }*/
+        //}
+
+        internal bool IsExpression {
+            get {
+                if (null != schemaTable.IsExpression) { // MDAC 62336
+                    object value = dataRow[schemaTable.IsExpression, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.IsExpression, "missing column IsExpression");
+                dataRow[schemaTable.IsExpression] = value;
+            }*/
+        }
+
+        //internal bool IsIdentity {
+            /*get {
+                if (null != schemaTable.IsIdentity) { // MDAC 62336
+                    object value = dataRow[schemaTable.IsIdentity, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }*/
+            /*set {
+                Debug.Assert(null != schemaTable.IsIdentity, "missing column IsIdentity");
+                dataRow[schemaTable.IsIdentity] = value;
+            }*/
+        //}
+
+        internal bool IsHidden {
+            get {
+                if (null != schemaTable.IsHidden) { // MDAC 62336
+                    object value = dataRow[schemaTable.IsHidden, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.IsHidden, "missing column IsHidden");
+                dataRow[schemaTable.IsHidden] = value;
+            }*/
+        }
+
+        internal bool IsLong {
+            get {
+                if (null != schemaTable.IsLong) { // MDAC 62336
+                    object value = dataRow[schemaTable.IsLong, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.IsLong, "missing column IsHidden");
+                dataRow[schemaTable.IsLong] = value;
+            }*/
+        }
+
+        internal bool IsReadOnly {
+            get {
+                if (null != schemaTable.IsReadOnly) { // MDAC 62336
+                    object value = dataRow[schemaTable.IsReadOnly, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return false;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.IsReadOnly, "missing column IsReadOnly");
+                dataRow[schemaTable.IsReadOnly] = value;
+            }*/
+        }
+
+        internal System.Type DataType {
+            get {
+                if (null != schemaTable.DataType) {
+                    object value = dataRow[schemaTable.DataType, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return(System.Type) value;
+                    }
+                }
+                return null;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.DataType, "missing column DataType");
+                dataRow[schemaTable.DataType] = value;
+            }*/
+        }
+
+        internal bool AllowDBNull {
+            get {
+                if (null != schemaTable.AllowDBNull) {
+                    object value = dataRow[schemaTable.AllowDBNull, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToBoolean(value, CultureInfo.InvariantCulture);
+                    }
+                }
+                return true;
+            }
+            /*set {
+                Debug.Assert(null != schemaTable.AllowDBNull, "missing column MaybeNull");
+                dataRow[schemaTable.AllowDBNull] = value;
+            }*/
+        }
+
+        /*internal Int32 ProviderType {
+            get {
+                if (null != schemaTable.ProviderType) {
+                    object value = dataRow[schemaTable.ProviderType, DataRowVersion.Default];
+                    if (!Convert.IsDBNull(value)) {
+                        return Convert.ToInt32(value);
+                    }
+                }
+                return 0;
+            }
+            set {
+                Debug.Assert(null != schemaTable.ProviderType, "missing column ProviderType");
+                dataRow[schemaTable.ProviderType] = value;
+            }
+        }*/
+
+        internal Int32 UnsortedIndex {
+            get {
+                return (Int32) dataRow[schemaTable.UnsortedIndex, DataRowVersion.Default];
+            }
+        }
+    }
+}