370 lines
8.9 KiB
C#
370 lines
8.9 KiB
C#
//
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// System.Data.Common.DbDataRecord.cs
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//
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// Author:
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// Tim Coleman (tim@timcoleman.com)
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//
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// Copyright (C) Tim Coleman, 2002-2003
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//
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//
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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Collections;
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using System.ComponentModel;
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using System.Data;
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using System.Runtime.CompilerServices;
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namespace System.Data.Common
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{
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public abstract class DbDataRecord : IDataRecord, ICustomTypeDescriptor
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{
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protected DbDataRecord ()
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{
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}
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public abstract int FieldCount { get; }
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public abstract object this [string name] { get; }
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public abstract object this [int i] { get; }
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public abstract bool GetBoolean (int i);
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public abstract byte GetByte (int i);
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public abstract long GetBytes (int i, long dataIndex, byte [] buffer, int bufferIndex,int length);
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public abstract char GetChar (int i);
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public abstract long GetChars (int i, long dataIndex, char [] buffer, int bufferIndex, int length);
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public abstract string GetDataTypeName (int i);
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public abstract DateTime GetDateTime (int i);
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public abstract decimal GetDecimal (int i);
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public abstract double GetDouble (int i);
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public abstract Type GetFieldType (int i);
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public abstract float GetFloat (int i);
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public abstract Guid GetGuid (int i);
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public abstract short GetInt16 (int i);
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public abstract int GetInt32 (int i);
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public abstract long GetInt64 (int i);
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public abstract string GetName (int i);
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public abstract int GetOrdinal (string name);
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public abstract string GetString (int i);
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public abstract object GetValue (int i);
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public abstract int GetValues (object [] values);
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public abstract bool IsDBNull (int i);
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public IDataReader GetData (int i)
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{
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return (IDataReader) GetValue (i);
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}
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protected virtual DbDataReader GetDbDataReader (int i)
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{
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throw new NotSupportedException ();
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}
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[MonoTODO]
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AttributeCollection ICustomTypeDescriptor.GetAttributes ()
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{
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return new AttributeCollection (null);
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}
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[MonoTODO]
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string ICustomTypeDescriptor.GetClassName ()
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{
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return string.Empty;
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}
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[MonoTODO]
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string ICustomTypeDescriptor.GetComponentName ()
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{
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return null;
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}
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[MonoTODO]
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TypeConverter ICustomTypeDescriptor.GetConverter ()
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{
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return null;
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}
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[MonoTODO]
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EventDescriptor ICustomTypeDescriptor.GetDefaultEvent ()
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{
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return null;
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}
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[MonoTODO]
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PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty ()
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{
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return null;
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}
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[MonoTODO]
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object ICustomTypeDescriptor.GetEditor (Type editorBaseType)
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{
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return null;
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}
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[MonoTODO]
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EventDescriptorCollection ICustomTypeDescriptor.GetEvents ()
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{
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return new EventDescriptorCollection (null);
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}
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[MonoTODO]
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EventDescriptorCollection ICustomTypeDescriptor.GetEvents (Attribute [] attributes)
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{
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return new EventDescriptorCollection (null);
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}
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[MonoTODO]
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PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties ()
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{
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DataColumnPropertyDescriptor[] descriptors =
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new DataColumnPropertyDescriptor [FieldCount];
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DataColumnPropertyDescriptor descriptor;
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for (int col = 0; col < FieldCount; col++) {
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descriptor = new DataColumnPropertyDescriptor(
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GetName (col), col, null);
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descriptor.SetComponentType (typeof (DbDataRecord));
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descriptor.SetPropertyType (GetFieldType (col));
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descriptors [col] = descriptor;
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}
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return new PropertyDescriptorCollection (descriptors);
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}
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[MonoTODO]
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PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties (Attribute [] attributes)
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{
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PropertyDescriptorCollection descriptors;
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descriptors = ((ICustomTypeDescriptor) this).GetProperties ();
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// TODO: filter out descriptors which do not contain
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// any of those attributes
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// except, those descriptors
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// that contain DefaultMemeberAttribute
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return descriptors;
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}
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[MonoTODO]
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object ICustomTypeDescriptor.GetPropertyOwner (PropertyDescriptor pd)
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{
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return this;
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}
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}
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class DbDataRecordImpl : DbDataRecord
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{
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#region Fields
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readonly SchemaInfo [] schema;
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readonly object [] values;
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readonly int fieldCount;
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#endregion
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#region Constructors
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// FIXME: this class should actually be reimplemented to be one
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// of the derived classes of DbDataRecord, which should become
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// almost abstract.
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internal DbDataRecordImpl (SchemaInfo[] schema, object[] values)
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{
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this.schema = schema;
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this.values = values;
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this.fieldCount = values.Length;
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}
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#endregion
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#region Properties
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public override int FieldCount {
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get { return fieldCount; }
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}
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public override object this [string name] {
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get { return this [GetOrdinal (name)]; }
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}
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public override object this [int i] {
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get { return GetValue (i); }
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}
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#endregion
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#region Methods
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public override bool GetBoolean (int i)
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{
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return (bool) GetValue (i);
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}
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public override byte GetByte (int i)
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{
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return (byte) GetValue (i);
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}
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public override long GetBytes (int i, long dataIndex, byte[] buffer, int bufferIndex, int length)
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{
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object value = GetValue (i);
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if (!(value is byte []))
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throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
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if ( buffer == null ) {
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// Return length of data
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return ((byte []) value).Length;
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} else {
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// Copy data into buffer
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Array.Copy ((byte []) value, (int) dataIndex, buffer, bufferIndex, length);
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return ((byte []) value).Length - dataIndex;
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}
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}
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public override char GetChar (int i)
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{
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return (char) GetValue (i);
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}
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public override long GetChars (int i, long dataIndex, char[] buffer, int bufferIndex, int length)
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{
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object value = GetValue (i);
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char [] valueBuffer;
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if (value is char[])
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valueBuffer = (char []) value;
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else if (value is string)
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valueBuffer = ((string) value).ToCharArray ();
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else
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throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
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if (buffer == null) {
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// Return length of data
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return valueBuffer.Length;
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} else {
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// Copy data into buffer
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Array.Copy (valueBuffer, (int) dataIndex, buffer, bufferIndex, length);
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return valueBuffer.Length - dataIndex;
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}
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}
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public override string GetDataTypeName (int i)
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{
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return schema[i].DataTypeName;
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}
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public override DateTime GetDateTime (int i)
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{
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return (DateTime) GetValue (i);
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}
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#if NET_2_0
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[MonoTODO]
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protected override DbDataReader GetDbDataReader (int ordinal)
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{
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throw new NotImplementedException ();
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}
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#endif
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public override decimal GetDecimal (int i)
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{
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return (decimal) GetValue (i);
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}
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public override double GetDouble (int i)
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{
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return (double) GetValue (i);
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}
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public override Type GetFieldType (int i)
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{
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return schema[i].FieldType;
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}
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public override float GetFloat (int i)
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{
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return (float) GetValue (i);
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}
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public override Guid GetGuid (int i)
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{
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return (Guid) GetValue (i);
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}
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public override short GetInt16 (int i)
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{
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return (short) GetValue (i);
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}
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public override int GetInt32 (int i)
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{
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return (int) GetValue (i);
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}
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public override long GetInt64 (int i)
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{
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return (long) GetValue (i);
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}
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public override string GetName (int i)
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{
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return schema [i].ColumnName;
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}
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public override int GetOrdinal (string name)
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{
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for (int i = 0; i < FieldCount; i++)
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if (schema [i].ColumnName == name)
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return i;
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return -1;
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}
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public override string GetString (int i)
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{
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return (string) GetValue (i);
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}
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public override object GetValue (int i)
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{
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if (i < 0 || i > fieldCount)
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throw new IndexOutOfRangeException ();
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return values [i];
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}
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public override int GetValues (object[] values)
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{
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if (values == null)
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throw new ArgumentNullException("values");
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int count = values.Length > this.values.Length ? this.values.Length : values.Length;
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for(int i = 0; i < count; i++)
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values [i] = this.values [i];
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return count;
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}
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public override bool IsDBNull (int i)
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{
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return GetValue (i) == DBNull.Value;
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}
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#endregion // Methods
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}
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}
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