1 files changed, 142 insertions, 0 deletions

diff --git a/OpenSim/Data/Base/BaseDatabaseConnector.cs b/OpenSim/Data/Base/BaseDatabaseConnector.cs
new file mode 100644
index 0000000..fa3a6c3
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+++ b/OpenSim/Data/Base/BaseDatabaseConnector.cs
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+/*
+ * 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.Collections.Generic;
+using System.Data;
+using System.Data.Common;
+
+namespace OpenSim.Framework.Data.Base
+{
+    public abstract class BaseDatabaseConnector
+    {
+        protected string m_connectionString;
+
+        public BaseDatabaseConnector(string connectionString)
+        {
+            m_connectionString = connectionString;
+        }
+
+        public abstract DbConnection GetNewConnection();
+        public abstract string CreateParamName(string fieldName);
+
+        public DbCommand CreateSelectCommand(BaseTableMapper mapper, DbConnection connection, string fieldName, object key)
+        {
+            string table = mapper.TableName;
+
+            DbCommand command = connection.CreateCommand();
+
+            string conditionString = CreateCondition(mapper, command, fieldName, key);
+
+            string query =
+                String.Format("select * from {0} where {1}", table, conditionString);
+
+            command.CommandText = query;
+            command.CommandType = CommandType.Text;
+
+            return command;
+        }
+
+        public string CreateCondition(BaseTableMapper mapper, DbCommand command, string fieldName, object key)
+        {
+            string keyFieldParamName = mapper.CreateParamName(fieldName);
+
+            DbParameter param = command.CreateParameter();
+            param.ParameterName = keyFieldParamName;
+            param.Value = ConvertToDbType(key);
+            command.Parameters.Add(param);
+
+            return String.Format("{0}={1}", fieldName, keyFieldParamName);
+        }
+
+        public DbCommand CreateUpdateCommand(BaseTableMapper mapper, DbConnection connection, object rowMapper, object primaryKey)
+        {
+            string table = mapper.TableName;
+
+            List<string> fieldNames = new List<string>();
+
+            DbCommand command = connection.CreateCommand();
+
+            foreach (BaseFieldMapper fieldMapper in mapper.Schema.Fields.Values)
+            {
+                if (fieldMapper != mapper.KeyFieldMapper)
+                {
+                    fieldMapper.ExpandField(rowMapper, command, fieldNames);
+                }
+            }
+
+            List<string> assignments = new List<string>();
+
+            foreach (string field in fieldNames)
+            {
+                assignments.Add(String.Format("{0}={1}", field, mapper.CreateParamName(field)));
+            }
+
+            string conditionString = mapper.CreateCondition(command, mapper.KeyFieldMapper.FieldName, primaryKey);
+
+            command.CommandText =
+                String.Format("update {0} set {1} where {2}", table, String.Join(", ", assignments.ToArray()),
+                              conditionString);
+
+            return command;
+        }
+
+        public DbCommand CreateInsertCommand(BaseTableMapper mapper, DbConnection connection, object obj)
+        {
+            string table = mapper.TableName;
+
+            List<string> fieldNames = new List<string>();
+
+            DbCommand command = connection.CreateCommand();
+
+            foreach (BaseFieldMapper fieldMapper in mapper.Schema.Fields.Values)
+            {
+                fieldMapper.ExpandField(obj, command, fieldNames);
+            }
+
+            List<string> paramNames = new List<string>();
+
+            foreach (string field in fieldNames)
+            {
+                paramNames.Add(mapper.CreateParamName(field));
+            }
+
+            command.CommandText =
+                String.Format("insert into {0} ({1}) values ({2})", table, String.Join(", ", fieldNames.ToArray()),
+                              String.Join(", ", paramNames.ToArray()));
+
+            return command;
+        }
+
+        public virtual object ConvertToDbType(object value)
+        {
+            return value;
+        }
+
+        public abstract BaseDataReader CreateReader(IDataReader reader);
+    }
+}