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#region Copyright
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#endregion
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using System;
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using System.Data.OleDb;
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using System.Data;
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using Seasar.Framework.Util;
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namespace Seasar.Extension.ADO.Types
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{
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public abstract class BaseValueType : IValueType
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{
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public BaseValueType()
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{
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}
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#region IValueType メンバ
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public virtual object GetValue(IDataReader reader, int index, Type type)
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{
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return GetValue(reader[index]);
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}
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public virtual object GetValue(IDataReader reader, string columnName, Type type)
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{
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return GetValue(reader[columnName]);
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}
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public virtual object GetValue(IDataReader reader, int index)
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{
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return GetValue(reader[index]);
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}
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public virtual object GetValue(IDataReader reader, string columnName)
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{
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return GetValue(reader[columnName]);
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}
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public abstract void BindValue(IDbCommand cmd, string columnName, object value);
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#endregion
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public void BindValue(IDbCommand cmd, string columnName, object value, DbType dbType)
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{
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BindVariableType vt = DataProviderUtil.GetBindVariableType(cmd);
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switch(vt)
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{
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case BindVariableType.QuestionWithParam:
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columnName = "?" + columnName;
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break;
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case BindVariableType.ColonWithParam:
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columnName = ":" + columnName;
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break;
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case BindVariableType.ColonWithParamToLower:
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columnName = ":" + columnName.ToLower();
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break;
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default:
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columnName = "@" + columnName;
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break;
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}
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IDbDataParameter parameter = cmd.CreateParameter();
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parameter.ParameterName = columnName;
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parameter.DbType = dbType;
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if("OleDbCommand".Equals(cmd.GetType().Name) && dbType == DbType.String)
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{
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OleDbParameter oleDbParam = parameter as OleDbParameter;
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oleDbParam.OleDbType = OleDbType.VarChar;
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}
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parameter.Value = GetBindValue(value);
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cmd.Parameters.Add(parameter);
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}
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protected object GetBindValue(object value)
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{
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if(value == null)
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{
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return DBNull.Value;
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}
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else if(value.GetType().IsPrimitive)
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{
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return value;
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}
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else if(value is System.Data.SqlTypes.INullable)
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{
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System.Data.SqlTypes.INullable nValue = (System.Data.SqlTypes.INullable) value;
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if(nValue.IsNull)
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{
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return DBNull.Value;
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}
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else
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{
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System.Reflection.PropertyInfo pi = value.GetType().GetProperty("Value");
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return pi.GetValue(value, null);
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}
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}
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else if(value is Nullables.INullableType)
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{
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Nullables.INullableType nValue = value as Nullables.INullableType;
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if(nValue == null || !nValue.HasValue)
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{
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return DBNull.Value;
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}
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else
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{
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return nValue.Value;
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}
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}
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else
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{
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return value == null ? DBNull.Value : value;
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}
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}
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protected abstract object GetValue(object value);
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}
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}
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