source/bizobjects/AyaLib/GuidFetcher.cs

@@ -0,0 +1,166 @@
+///////////////////////////////////////////////////////////
+//  Bool.cs
+//  Implementation of Class GuidFetcher
+//  CSLA type: Read-only object
+//  Created on: 20-May-2010
+//  Object design: John 
+//	Coded: John 20-May-2010
+///////////////////////////////////////////////////////////
+
+using System;
+using System.Data;
+using CSLA.Data;
+using GZTW.Data;
+using CSLA;
+using System.Threading;
+using CSLA.Security;
+
+
+
+namespace GZTW.AyaNova.BLL
+{
+    /// <summary>
+    /// Used to quickly fetch a single Guid record from the db
+    /// </summary>
+    [Serializable]
+    public class GuidFetcher : ReadOnlyBase
+    {
+#pragma warning disable 1591
+        #region Attributes
+        private Guid mGuidValue;
+
+        #endregion
+
+        #region Constructor
+
+        /// <summary>
+        /// Private constructor to prevent direct instantiation
+        /// </summary>
+        private GuidFetcher()
+        {
+
+        }
+        #endregion
+
+        #region Business properties
+
+
+
+        public Guid GuidValue
+        {
+            get
+            {
+                return mGuidValue;
+            }
+
+        }
+
+        #endregion
+
+        #region System.Object overrides
+        public override string ToString()
+        {
+            return mGuidValue.ToString();
+        }
+
+        /// 
+        /// <param Bool="obj"></param>
+        public override bool Equals(Object obj)
+        {
+            if (obj == null || GetType() != obj.GetType()) return false;
+            GuidFetcher c = (GuidFetcher)obj;
+            return mGuidValue == c.mGuidValue;
+        }
+
+        public override int GetHashCode()
+        {
+            return ("Guid" + mGuidValue.ToString()).GetHashCode();
+        }
+
+        #endregion
+
+        #region Static methods
+
+/// <summary>
+/// Fetch Guid based on unique text value
+/// e.g. a Client's Name or a Unit's unique Serial number
+/// (Table's ID column is assumed to be AID when calling this method)
+/// </summary>
+/// <param name="Table"></param>
+/// <param name="UniqueTextFieldName"></param>
+/// <param name="sUniqueTextValue"></param>
+/// <returns></returns>
+        public static Guid GetItem(string Table, string UniqueTextFieldName, string sUniqueTextValue)
+        {
+
+            return ((GuidFetcher)DataPortal.Fetch(new Criteria(Table, UniqueTextFieldName, sUniqueTextValue))).GuidValue;
+
+        }
+
+
+        #endregion
+
+        #region DAL DATA ACCESS
+       
+        protected override void DataPortal_Fetch(object Criteria)
+        {
+            Criteria crit = (Criteria)Criteria;
+            try
+            {
+
+                if (string.IsNullOrEmpty(crit.UniqueTextValue))
+                {
+                    mGuidValue = Guid.Empty;
+                    return;
+                }
+                DBCommandWrapper dbCommandWrapper = DBUtil.DB.GetSqlStringCommandWrapper(
+                    "SELECT aID FROM " + AyaBizUtils.ToDBName(crit.Table) + " WHERE " +
+                        "(" + AyaBizUtils.ToDBName(crit.FieldName) + " = @ANAME)"
+                    );
+                dbCommandWrapper.AddInParameter("@ANAME", DbType.String, crit.UniqueTextValue);             
+                mGuidValue = DBUtil.ToGuid(DBUtil.DB.ExecuteScalar(dbCommandWrapper));
+               
+
+
+            }
+            catch (Exception ex)
+            {
+
+                throw new System.ArgumentException(
+                    string.Format(LocalizedTextTable.GetLocalizedTextDirect("Error.Object.NameFetcherNotFound")/*Name/bool Fetcher: Field {0} in table {1} with record ID {2} not found!*/,
+                    crit.FieldName, crit.Table, crit.UniqueTextValue) +
+                    "\r\n(" + ex.Message + ")");
+            }
+        }
+
+
+
+        #endregion
+
+        #region criteria
+        /// <summary>
+        /// Criteria for identifying existing object
+        /// </summary>
+        [Serializable]
+        private class Criteria
+        {
+
+            public string Table;
+            public string FieldName;
+            public string UniqueTextValue;
+
+            public Criteria(string _Table, string _FieldName, string _UniqueTextValue)
+            {
+                if (_Table == "User")
+                    _Table = "aUser";
+                Table = _Table;
+                FieldName = _FieldName;
+                UniqueTextValue = _UniqueTextValue;
+            }
+
+        }
+        #endregion
+#pragma warning restore 1591
+    }//end Bool
+
+}//end Boolspace GZTW.AyaNova.BLL