forked from EntitySpaces/EntitySpaces-CompleteSource
/
Database.cs
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Database.cs
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/* New BSD License
-------------------------------------------------------------------------------
Copyright (c) 2006-2012, EntitySpaces, LLC
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the EntitySpaces, LLC nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL EntitySpaces, LLC BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-------------------------------------------------------------------------------
*/
using System;
using System.ComponentModel;
using System.Text;
using System.Xml;
using System.IO;
using System.Data;
using System.Data.OleDb;
using System.Collections;
using ADODB;
namespace EntitySpaces.MetadataEngine
{
public class Database : Single, IDatabase, INameValueItem
{
public Database()
{
}
virtual public ADODB.Recordset ExecuteSql(string sql)
{
Recordset oRS = new Recordset();
OleDbConnection cn = null;
OleDbDataReader reader = null;
try
{
cn = new OleDbConnection(dbRoot.ConnectionString);
cn.Open();
try
{
cn.ChangeDatabase(this.Name);
}
catch { } // some databases don't have the concept of catalogs. Catch this and throw it out
OleDbCommand command = new OleDbCommand(sql, cn);
command.CommandType = CommandType.Text;
reader = command.ExecuteReader();
DataTable schema;
string dataType, fieldname;
int length;
bool firstTime = true;
while (reader.Read())
{
if (firstTime)
{
schema = reader.GetSchemaTable();
foreach (DataRow row in schema.Rows)
{
fieldname = row["ColumnName"].ToString();
dataType = row["DataType"].ToString();
length = Convert.ToInt32(row["ColumnSize"]);
oRS.Fields.Append(fieldname, GetADOType(dataType), length,
FieldAttributeEnum.adFldIsNullable, System.Reflection.Missing.Value);
}
oRS.Open(System.Reflection.Missing.Value, System.Reflection.Missing.Value,
CursorTypeEnum.adOpenStatic, LockTypeEnum.adLockOptimistic, 1);
firstTime = false;
}
oRS.AddNew(System.Reflection.Missing.Value, System.Reflection.Missing.Value);
for(int i = 0; i < reader.FieldCount; i++)
{
if (reader[i] is System.Guid)
{
oRS.Fields[i].Value = "{" + reader[i].ToString() + "}";
}
else
{
oRS.Fields[i].Value = reader[i];
}
}
}
cn.Close();
//Move to the first record
if (!firstTime)
{
oRS.MoveFirst();
}
else
{
oRS = null;
}
}
catch (Exception ex)
{
if ((reader != null) && (!reader.IsClosed))
{
reader.Close();
reader = null;
}
if ((cn != null) && (cn.State == ConnectionState.Open))
{
cn.Close();
cn = null;
}
throw ex;
}
return oRS;
}
protected ADODB.Recordset ExecuteIntoRecordset(string sql, IDbConnection cn)
{
Recordset oRS = new Recordset();
IDataReader reader = null;
try
{
IDbCommand command = cn.CreateCommand();
command.CommandText = sql;
command.CommandType = CommandType.Text;
reader = command.ExecuteReader();
DataTable schema;
string dataType, fieldname;
int length;
bool firstTime = true;
// Skip columns contains the index of any columns that we cannot handle, array types and such ...
Hashtable skipColumns = null;
while (reader.Read())
{
if (firstTime)
{
skipColumns = new Hashtable();
schema = reader.GetSchemaTable();
int colID = 0;
foreach (DataRow row in schema.Rows)
{
fieldname = row["ColumnName"].ToString();
dataType = row["DataType"].ToString();
length = Convert.ToInt32(row["ColumnSize"]);
try
{
oRS.Fields.Append(fieldname, GetADOType(dataType), length,
FieldAttributeEnum.adFldIsNullable, System.Reflection.Missing.Value);
}
catch
{
// We can't handle this column type, ie, Firebird array types
skipColumns[colID] = colID;
}
colID++;
}
oRS.Open(System.Reflection.Missing.Value, System.Reflection.Missing.Value,
CursorTypeEnum.adOpenStatic, LockTypeEnum.adLockOptimistic, 1);
firstTime = false;
}
oRS.AddNew(System.Reflection.Missing.Value, System.Reflection.Missing.Value);
for(int i = 0, j = 0; i < reader.FieldCount; i++)
{
// Skip columns that we cannot handle
if(!skipColumns.ContainsKey(i))
{
if (reader[j] is System.Guid)
{
oRS.Fields[j].Value = "{" + reader[j].ToString() + "}";
}
else
{
try
{
oRS.Fields[j].Value = reader[j];
}
catch
{
// For some reason it wouldn't accept this value?
oRS.Fields[j].Value = DBNull.Value;
}
}
j++;
}
}
}
cn.Close();
//Move to the first record
if (!firstTime)
{
oRS.MoveFirst();
}
else
{
oRS = null;
}
}
catch (Exception ex)
{
if ((reader != null) && (!reader.IsClosed))
{
reader.Close();
reader = null;
}
if ((cn != null) && (cn.State == ConnectionState.Open))
{
cn.Close();
cn = null;
}
throw ex;
}
return oRS;
}
protected DataTypeEnum GetADOType(string sType)
{
switch(sType)
{
case null:
return DataTypeEnum.adEmpty;
case "System.Byte":
return DataTypeEnum.adUnsignedTinyInt;
case "System.SByte":
return DataTypeEnum.adTinyInt;
case "System.Boolean":
return DataTypeEnum.adBoolean;
case "System.Int16":
return DataTypeEnum.adSmallInt;
case "System.Int32":
return DataTypeEnum.adInteger;
case "System.Int64":
return DataTypeEnum.adBigInt;
case "System.Single":
return DataTypeEnum.adSingle;
case "System.Double":
return DataTypeEnum.adDouble;
case "System.Decimal":
return DataTypeEnum.adDecimal;
case "System.DateTime":
return DataTypeEnum.adDate;
case "System.Guid":
return DataTypeEnum.adGUID;
case "System.String":
return DataTypeEnum.adBSTR; //.adChar;
case "System.Byte[]":
return DataTypeEnum.adBinary;
case "System.Array":
return DataTypeEnum.adArray;
case "System.Object":
return DataTypeEnum.adVariant;
default:
return 0;
}
}
virtual public ITables Tables
{
get
{
if(null == _tables)
{
_tables = (Tables)this.dbRoot.ClassFactory.CreateTables();
_tables.dbRoot = this._dbRoot;
_tables.Database = this;
_tables.LoadAll();
}
return _tables;
}
}
virtual public IViews Views
{
get
{
if(null == _views)
{
_views = (Views)this.dbRoot.ClassFactory.CreateViews();
_views.dbRoot = this._dbRoot;
_views.Database = this;
_views.LoadAll();
}
return _views;
}
}
[Browsable(false)]
virtual public IProcedures Procedures
{
get
{
if(null == _procedures)
{
_procedures = (Procedures)this.dbRoot.ClassFactory.CreateProcedures();
_procedures.dbRoot = this._dbRoot;
_procedures.Database = this;
_procedures.LoadAll();
}
return _procedures;
}
}
[Browsable(false)]
virtual public IDomains Domains
{
get
{
if(null == _domains)
{
_domains = (Domains)this.dbRoot.ClassFactory.CreateDomains();
_domains.dbRoot = this._dbRoot;
_domains.Database = this;
_domains.LoadAll();
}
return _domains;
}
}
override public string Alias
{
get
{
XmlNode node = null;
if(this.GetXmlNode(out node, false))
{
string niceName = null;
if(this.GetUserData(node, "Alias", out niceName))
{
if(string.Empty != niceName)
return niceName;
}
}
// There was no nice name
return this.Name;
}
set
{
XmlNode node = null;
if(this.GetXmlNode(out node, true))
{
this.SetUserData(node, "Alias", value);
}
}
}
override public string Name
{
get
{
return this.GetString(Databases.f_Catalog);
}
}
virtual public string Description
{
get
{
return this.GetString(Databases.f_Description);
}
}
virtual public string SchemaName
{
get
{
return this.GetString(Databases.f_SchemaName);
}
}
virtual public string SchemaOwner
{
get
{
return this.GetString(Databases.f_SchemaOwner);
}
}
[Browsable(false)]
virtual public string DefaultCharSetCatalog
{
get
{
return this.GetString(Databases.f_DefCharSetCat);
}
}
[Browsable(false)]
virtual public string DefaultCharSetSchema
{
get
{
return this.GetString(Databases.f_DefCharSetSchema);
}
}
[Browsable(false)]
virtual public string DefaultCharSetName
{
get
{
return this.GetString(Databases.f_DefCharSetName);
}
}
[Browsable(false)]
virtual public Root Root
{
get
{
return this.dbRoot;
}
}
#region XML User Data
[Browsable(false)]
override public string UserDataXPath
{
get
{
return Databases.UserDataXPath + @"/Database[@Name='" + this.Name + "']";
}
}
override internal bool GetXmlNode(out XmlNode node, bool forceCreate)
{
node = null;
bool success = false;
if(null == _xmlNode)
{
// Get the parent node
XmlNode parentNode = null;
if(this.Databases.GetXmlNode(out parentNode, forceCreate))
{
// See if our user data already exists
string xPath = @"./Database[@Name='" + this.Name + "']";
if(!GetUserData(xPath, parentNode, out _xmlNode) && forceCreate)
{
// Create it, and try again
this.CreateUserMetaData(parentNode);
GetUserData(xPath, parentNode, out _xmlNode);
}
}
}
if(null != _xmlNode)
{
node = _xmlNode;
success = true;
}
return success;
}
override public void CreateUserMetaData(XmlNode parentNode)
{
XmlNode myNode = parentNode.OwnerDocument.CreateNode(XmlNodeType.Element, "Database", null);
parentNode.AppendChild(myNode);
XmlAttribute attr;
attr = parentNode.OwnerDocument.CreateAttribute("Name");
attr.Value = this.Name;
myNode.Attributes.Append(attr);
}
#endregion
#region INameValueCollection Members
[Browsable(false)]
public string ItemName
{
get
{
return this.Name;
}
}
[Browsable(false)]
public string ItemValue
{
get
{
return this.Name;
}
}
#endregion
internal Databases Databases = null;
protected Tables _tables = null;
protected Views _views = null;
protected Procedures _procedures = null;
protected Domains _domains = null;
// Global properties are per Database
internal PropertyCollection _columnProperties = null;
internal PropertyCollection _databaseProperties = null;
internal PropertyCollection _foreignkeyProperties = null;
internal PropertyCollection _indexProperties = null;
internal PropertyCollection _parameterProperties = null;
internal PropertyCollection _procedureProperties = null;
internal PropertyCollection _resultColumnProperties = null;
internal PropertyCollection _tableProperties = null;
internal PropertyCollection _viewProperties = null;
internal PropertyCollection _domainProperties = null;
}
}