whole lot more moving

OpenSim/Data/Base/BaseFieldMapper.cs

@@ -0,0 +1,168 @@
+/*
+ * 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.Common;
+
+namespace OpenSim.Framework.Data.Base
+{  
+    public delegate TField ObjectGetAccessor<TObj, TField>(TObj obj);
+    public delegate void ObjectSetAccessor<TObj, TField>(TObj obj, TField value);
+
+    public abstract class BaseFieldMapper
+    {
+        private readonly BaseTableMapper m_tableMapper;
+        private readonly string m_fieldName;
+
+        public string FieldName
+        {
+            get { return m_fieldName; }
+        }
+
+        protected Type m_valueType;
+
+        public Type ValueType
+        {
+            get { return m_valueType; }
+        }
+
+        public abstract object GetParamValue(object obj);
+
+        public BaseFieldMapper(BaseTableMapper tableMapper, string fieldName, Type valueType)
+        {
+            m_fieldName = fieldName;
+            m_valueType = valueType;
+            m_tableMapper = tableMapper;
+        }
+
+        public abstract void SetPropertyFromReader(object mapper, BaseDataReader reader);
+
+        public void RawAddParam(DbCommand command, List<string> fieldNames, string fieldName, object value)
+        {
+            string paramName = m_tableMapper.CreateParamName(fieldName);
+            fieldNames.Add(fieldName);
+
+            DbParameter param = command.CreateParameter();
+            param.ParameterName = paramName;
+            param.Value = value;
+
+            command.Parameters.Add(param);
+        }
+
+        public virtual void ExpandField<TObj>(TObj obj, DbCommand command, List<string> fieldNames)
+        {
+            string fieldName = FieldName;
+            object value = GetParamValue(obj);
+
+            RawAddParam(command, fieldNames, fieldName, m_tableMapper.ConvertToDbType(value));
+        }
+
+        protected virtual object GetValue(BaseDataReader reader)
+        {
+            object value;
+
+            if (ValueType == typeof(Guid))
+            {
+                value = reader.GetGuid(m_fieldName);
+            }
+            else if (ValueType == typeof(bool))
+            {
+                uint boolVal = reader.GetUShort(m_fieldName);
+                value = (boolVal == 1);
+            }
+            else
+                if (ValueType == typeof(byte))
+                {
+                    value = reader.GetByte(m_fieldName);
+                }
+                else if (ValueType == typeof(sbyte))
+                {
+                    value = reader.GetSByte(m_fieldName);
+                }
+                else if (ValueType == typeof(ushort))
+                {
+                    value = reader.GetUShort(m_fieldName);
+                }
+                else if (ValueType == typeof(uint))
+                {
+                    value = reader.GetUInt32(m_fieldName);
+                }
+                else if (ValueType == typeof(byte[]))
+                {
+                    value = reader.GetBytes(m_fieldName);
+                }
+                else
+                {
+                    value = reader.Get(m_fieldName);
+                }
+
+            if (value is DBNull)
+            {
+                value = default(ValueType);
+            }
+
+            return value;
+        }
+    }
+
+    public class ObjectField<TObject, TField> : BaseFieldMapper
+    {
+        private readonly ObjectGetAccessor<TObject, TField> m_fieldGetAccessor;
+        private readonly ObjectSetAccessor<TObject, TField> m_fieldSetAccessor;
+
+        public override object GetParamValue(object obj)
+        {
+            return m_fieldGetAccessor((TObject)obj);
+        }
+
+        public override void SetPropertyFromReader(object obj, BaseDataReader reader)
+        {
+            object value;
+
+            value = GetValue(reader);
+
+            if (value == null)
+            {
+                m_fieldSetAccessor((TObject)obj, default(TField));
+            }
+            else
+            {
+                m_fieldSetAccessor((TObject)obj, (TField)value);
+            }
+        }
+
+
+        public ObjectField(BaseTableMapper tableMapper, string fieldName, ObjectGetAccessor<TObject, TField> rowMapperGetAccessor,
+                           ObjectSetAccessor<TObject, TField> rowMapperSetAccessor)
+            : base(tableMapper, fieldName, typeof(TField))
+        {
+            m_fieldGetAccessor = rowMapperGetAccessor;
+            m_fieldSetAccessor = rowMapperSetAccessor;
+        }
+    }
+}