added marr.datamapper source code for easy debugging.

Marr.Data/QGen/UpdateQueryBuilder.cs

@@ -0,0 +1,176 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Marr.Data.Mapping;
+using System.Linq.Expressions;
+
+namespace Marr.Data.QGen
+{
+    public class UpdateQueryBuilder<T>
+    {
+        private DataMapper _db;
+        private string _tableName;
+        private T _entity;
+        private MappingHelper _mappingHelper;
+        private ColumnMapCollection _mappings;
+        private SqlModes _previousSqlMode;
+        private bool _generateQuery = true;
+        private TableCollection _tables;
+        private Expression<Func<T, bool>> _filterExpression;
+        private Dialects.Dialect _dialect;
+        private ColumnMapCollection _columnsToUpdate;
+
+        public UpdateQueryBuilder()
+        {
+            // Used only for unit testing with mock frameworks
+        }
+
+        public UpdateQueryBuilder(DataMapper db)
+        {
+            _db = db;
+            _tableName = MapRepository.Instance.GetTableName(typeof(T));
+            _tables = new TableCollection();
+            _tables.Add(new Table(typeof(T)));
+            _previousSqlMode = _db.SqlMode;
+            _mappingHelper = new MappingHelper(_db);
+            _mappings = MapRepository.Instance.GetColumns(typeof(T));
+            _dialect = QueryFactory.CreateDialect(_db);
+        }
+
+        public virtual UpdateQueryBuilder<T> TableName(string tableName)
+        {
+            _tableName = tableName;
+            return this;
+        }
+
+        public virtual UpdateQueryBuilder<T> QueryText(string queryText)
+        {
+            _generateQuery = false;
+            _db.Command.CommandText = queryText;
+            return this;
+        }
+
+        public virtual UpdateQueryBuilder<T> Entity(T entity)
+        {
+            _entity = entity;
+            return this;
+        }
+
+        public virtual UpdateQueryBuilder<T> Where(Expression<Func<T, bool>> filterExpression)
+        {
+            _filterExpression = filterExpression;
+            return this;
+        }
+
+        public virtual UpdateQueryBuilder<T> ColumnsIncluding(params Expression<Func<T, object>>[] properties)
+        {
+            List<string> columnList = new List<string>();
+
+            foreach (var column in properties)
+            {
+                columnList.Add(column.GetMemberName());
+            }
+
+            return ColumnsIncluding(columnList.ToArray());
+        }
+
+        public virtual UpdateQueryBuilder<T> ColumnsIncluding(params string[] properties)
+        {
+            _columnsToUpdate = new ColumnMapCollection();
+
+            foreach (string propertyName in properties)
+            {
+                _columnsToUpdate.Add(_mappings.GetByFieldName(propertyName));
+            }
+
+            return this;
+        }
+
+        public virtual UpdateQueryBuilder<T> ColumnsExcluding(params Expression<Func<T, object>>[] properties)
+        {
+            List<string> columnList = new List<string>();
+
+            foreach (var column in properties)
+            {
+                columnList.Add(column.GetMemberName());
+            }
+
+            return ColumnsExcluding(columnList.ToArray());
+        }
+
+        public virtual UpdateQueryBuilder<T> ColumnsExcluding(params string[] properties)
+        {
+            _columnsToUpdate = new ColumnMapCollection();
+
+            _columnsToUpdate.AddRange(_mappings);
+
+            foreach (string propertyName in properties)
+            {
+                _columnsToUpdate.RemoveAll(c => c.FieldName == propertyName);
+            }
+
+            return this;
+        }
+
+        public virtual string BuildQuery()
+        {
+            if (_entity == null)
+                throw new ArgumentNullException("You must specify an entity to update.");
+
+            // Override SqlMode since we know this will be a text query
+            _db.SqlMode = SqlModes.Text;
+
+            var columnsToUpdate = _columnsToUpdate ?? _mappings;
+
+            _mappingHelper.CreateParameters<T>(_entity, columnsToUpdate, _generateQuery);
+
+            string where = string.Empty;
+            if (_filterExpression != null)
+            {
+                var whereBuilder = new WhereBuilder<T>(_db.Command, _dialect, _filterExpression, _tables, false, false);
+                where = whereBuilder.ToString();
+            }
+
+            IQuery query = QueryFactory.CreateUpdateQuery(columnsToUpdate, _db, _tableName, where);
+
+            _db.Command.CommandText = query.Generate();
+
+            return _db.Command.CommandText;
+        }
+
+        public virtual int Execute()
+        {
+            if (_generateQuery)
+            {
+                BuildQuery();
+            }
+            else
+            {
+                _mappingHelper.CreateParameters<T>(_entity, _mappings, _generateQuery);
+            }
+
+            int rowsAffected = 0;
+
+            try
+            {
+                _db.OpenConnection();
+                rowsAffected = _db.Command.ExecuteNonQuery();
+                _mappingHelper.SetOutputValues<T>(_entity, _mappings.OutputFields);                
+            }
+            finally
+            {
+                _db.CloseConnection();
+            }
+
+
+            if (_generateQuery)
+            {
+                // Return to previous sql mode
+                _db.SqlMode = _previousSqlMode;
+            }
+
+            return rowsAffected;
+        }
+    }
+}