From c52c68f314c67c76c7181a6d0828f476290fbd66 Mon Sep 17 00:00:00 2001 From: Sean Dague Date: Wed, 2 Apr 2008 15:24:31 +0000 Subject: whole lot more moving --- OpenSim/Data/Base/BaseTableMapper.cs | 281 +++++++++++++++++++++++++++++++++++ 1 file changed, 281 insertions(+) create mode 100644 OpenSim/Data/Base/BaseTableMapper.cs (limited to 'OpenSim/Data/Base/BaseTableMapper.cs') diff --git a/OpenSim/Data/Base/BaseTableMapper.cs b/OpenSim/Data/Base/BaseTableMapper.cs new file mode 100644 index 0000000..cad4823 --- /dev/null +++ b/OpenSim/Data/Base/BaseTableMapper.cs @@ -0,0 +1,281 @@ +/* + * Copyright (c) Contributors, http://opensimulator.org/ + * See CONTRIBUTORS.TXT for a full list of copyright holders. + * + * 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 OpenSim Project 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 DEVELOPERS ``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 THE CONTRIBUTORS 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.Data; +using System.Data.Common; +using OpenSim.Framework.Data.Base; + +namespace OpenSim.Framework.Data.Base +{ + public abstract class BaseTableMapper + { + private readonly BaseDatabaseConnector m_database; + private readonly object m_syncRoot = new object(); + + protected void WithConnection(Action action) + { + lock (m_syncRoot) + { + DbConnection m_connection = m_database.GetNewConnection(); + + if (m_connection.State != ConnectionState.Open) + { + m_connection.Open(); + } + + action(m_connection); + + if (m_connection.State == ConnectionState.Open) + { + m_connection.Close(); + } + } + } + + private readonly string m_tableName; + public string TableName + { + get { return m_tableName; } + } + + protected BaseSchema m_schema; + public BaseSchema Schema + { + get { return m_schema; } + } + + protected BaseFieldMapper m_keyFieldMapper; + public BaseFieldMapper KeyFieldMapper + { + get { return m_keyFieldMapper; } + } + + public BaseTableMapper(BaseDatabaseConnector database, string tableName) + { + m_database = database; + m_tableName = tableName.ToLower(); // Stupid MySQL hack. + } + + public string CreateParamName(string fieldName) + { + return m_database.CreateParamName(fieldName); + } + + protected DbCommand CreateSelectCommand(DbConnection connection, string fieldName, object primaryKey) + { + return m_database.CreateSelectCommand(this, connection, fieldName, primaryKey); + } + + public string CreateCondition(DbCommand command, string fieldName, object key) + { + return m_database.CreateCondition(this, command, fieldName, key); + } + + public DbCommand CreateInsertCommand(DbConnection connection, object obj) + { + return m_database.CreateInsertCommand(this, connection, obj); + } + + public DbCommand CreateUpdateCommand(DbConnection connection, object rowMapper, object primaryKey) + { + return m_database.CreateUpdateCommand(this, connection, rowMapper, primaryKey); + } + + public object ConvertToDbType(object value) + { + return m_database.ConvertToDbType(value); + } + + protected virtual BaseDataReader CreateReader(IDataReader reader) + { + return m_database.CreateReader(reader); + } + } + + public abstract class BaseTableMapper : BaseTableMapper + { + public BaseTableMapper(BaseDatabaseConnector database, string tableName) + : base(database, tableName) + { + } + + // HACK: This is a temporary function used by TryGetValue(). + // Due to a bug in mono 1.2.6, delegate blocks cannot contain + // a using() block. This has been fixed in SVN, so the next + // mono release should work. + private void TryGetConnectionValue(DbConnection connection, TPrimaryKey primaryKey, ref TRowMapper result, ref bool success) + { + using ( + DbCommand command = + CreateSelectCommand(connection, KeyFieldMapper.FieldName, primaryKey)) + { + using (IDataReader reader = command.ExecuteReader()) + { + if (reader.Read()) + { + result = FromReader( CreateReader(reader)); + success = true; + } + else + { + success = false; + } + } + } + } + + public bool TryGetValue(TPrimaryKey primaryKey, out TRowMapper value) + { + TRowMapper result = default(TRowMapper); + bool success = false; + + WithConnection(delegate(DbConnection connection) + { + TryGetConnectionValue(connection, primaryKey, ref result, ref success); + }); + + value = result; + + return success; + } + + // HACK: This is a temporary function used by Remove(). + // Due to a bug in mono 1.2.6, delegate blocks cannot contain + // a using() block. This has been fixed in SVN, so the next + // mono release should work. + protected virtual void TryDelete(DbConnection connection, TPrimaryKey id, ref int deleted) + { + using ( + DbCommand command = + CreateDeleteCommand(connection, KeyFieldMapper.FieldName, id)) + { + deleted = command.ExecuteNonQuery(); + } + } + + public virtual bool Remove(TPrimaryKey id) + { + int deleted = 0; + + WithConnection(delegate(DbConnection connection) + { + TryDelete(connection, id, ref deleted); + }); + + if (deleted == 1) + { + return true; + } + else + { + return false; + } + } + + public DbCommand CreateDeleteCommand(DbConnection connection, string fieldName, TPrimaryKey primaryKey) + { + string table = TableName; + + DbCommand command = connection.CreateCommand(); + + string conditionString = CreateCondition(command, fieldName, primaryKey); + + string query = + String.Format("delete from {0} where {1}", table, conditionString); + + command.CommandText = query; + command.CommandType = CommandType.Text; + + return command; + } + + // HACK: This is a temporary function used by Update(). + // Due to a bug in mono 1.2.6, delegate blocks cannot contain + // a using() block. This has been fixed in SVN, so the next + // mono release should work. + protected void TryUpdate(DbConnection connection, TPrimaryKey primaryKey, TRowMapper value, ref int updated) + { + using (DbCommand command = CreateUpdateCommand(connection, value, primaryKey)) + { + updated = command.ExecuteNonQuery(); + } + } + + public virtual bool Update(TPrimaryKey primaryKey, TRowMapper value) + { + int updated = 0; + + WithConnection(delegate(DbConnection connection) + { + TryUpdate(connection, primaryKey, value, ref updated); + }); + + if (updated == 1) + { + return true; + } + else + { + return false; + } + } + + // HACK: This is a temporary function used by Add(). + // Due to a bug in mono 1.2.6, delegate blocks cannot contain + // a using() block. This has been fixed in SVN, so the next + // mono release should work. + protected void TryAdd(DbConnection connection, TRowMapper value, ref int added) + { + using (DbCommand command = CreateInsertCommand(connection, value)) + { + added = command.ExecuteNonQuery(); + } + } + + public virtual bool Add(TRowMapper value) + { + int added = 0; + + WithConnection(delegate(DbConnection connection) + { + TryAdd(connection, value, ref added); + }); + + if (added == 1) + { + return true; + } + else + { + return false; + } + } + + public abstract TRowMapper FromReader(BaseDataReader reader); + } +} -- cgit v1.1