start creating a new project: Micro ORM

git-svn-id: svn://ttmath.org/publicrep/morm/trunk@1072 e52654a7-88a9-db11-a3e9-0013d4bc506e

src/modelconnector.h

@@ -0,0 +1,128 @@
+/*
+ * This file is a part of morm
+ * and is distributed under the 2-Clause BSD licence.
+ * Author: Tomasz Sowa <t.sowa@ttmath.org>
+ */
+
+/*
+ * Copyright (c) 2018, Tomasz Sowa
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR 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.
+ *
+ */
+
+#ifndef headerfile_morm_modelconnector
+#define headerfile_morm_modelconnector
+
+#include "expression.h"
+
+
+
+namespace morm
+{
+class Model;
+
+
+class ModelConnector
+{
+
+public:
+
+	ModelConnector();
+	~ModelConnector();
+
+	// FIX ME
+	// add c-copy ctr (allocate a new stream and expression)
+
+	void set_expression(Expression & expression);
+	void set_stream(PT::TextStream & stream);
+
+	Expression * get_expression();
+	PT::TextStream * get_stream();
+
+	virtual void to_json(PT::TextStream & stream, Model & model);
+	virtual void insert(PT::TextStream & stream, Model & model, int db_type);
+	virtual void update(PT::TextStream & stream, Model & model, int db_type);
+
+	virtual void insert(PT::TextStream & stream, Model & model);
+	virtual void update(PT::TextStream & stream, Model & model);
+
+	virtual void to_json(Model & model);
+	virtual void insert(Model & model, int db_type);
+	virtual void update(Model & model, int db_type);
+
+	virtual void insert(Model & model);
+	virtual void update(Model & model);
+
+protected:
+
+	Expression * expression;
+	PT::TextStream * out_stream; // IMPROVE ME give here an interface to the base stream (implement him)
+	BaseEscaper * json_escaper;
+	BaseEscaper * postgresql_escaper;
+
+	bool expression_allocated;
+	bool out_stream_allocated;
+	bool json_escaper_allocated;
+	bool postgresql_escaper_allocated;
+
+	int assigned_db_type;
+
+	void allocate_default_expression();
+	void allocate_default_expression_if_needed();
+	void deallocate_expression();
+
+	void allocate_default_stream();
+	void allocate_default_stream_if_needed();
+	void deallocate_stream();
+
+	void allocate_default_json_escaper();
+	void allocate_default_json_escaper_if_needed();
+	void deallocate_json_escaper();
+
+	void allocate_default_postgresql_escaper();
+	void allocate_default_postgresql_escaper_if_needed();
+	void deallocate_postgresql_escaper();
+
+	void allocate_default_db_escaper_if_needed();
+
+
+	template<typename FieldValue>
+	void field(const wchar_t * field_name, const FieldValue & field_value, bool insertable, bool updatable, bool is_primary_key)
+	{
+		if( expression )
+		{
+			expression->field(field_name, field_value, insertable, updatable, is_primary_key);
+		}
+	}
+
+	/*
+	 * Model is using field() method
+	 */
+	friend Model;
+};
+
+}
+
+#endif