1 files changed, 53 insertions, 0 deletions
diff --git a/qlite/src/statement_builder.vala b/qlite/src/statement_builder.vala
new file mode 100644
index 00000000..8df069dd
--- /dev/null
+++ b/qlite/src/statement_builder.vala
@@ -0,0 +1,53 @@
+using Sqlite;
+
+namespace Qlite {
+
+public abstract class StatementBuilder {
+    protected Database db;
+
+    public StatementBuilder(Database db) {
+        this.db = db;
+    }
+
+    public abstract Statement prepare() throws DatabaseError;
+
+    protected class Field<T> {
+        public T value;
+        public Column<T>? column;
+
+        public Field(Column<T>? column, T value) {
+            this.column = column;
+            this.value = value;
+        }
+
+        public virtual void bind(Statement stmt, int index) {
+            if (column != null) {
+                column.bind(stmt, index, value);
+            } else {
+                throw new DatabaseError.NOT_SUPPORTED("binding was not implemented for this field.");
+            }
+        }
+    }
+
+    protected class NullField<T> : Field<T> {
+        public NullField(Column<T>? column) {
+            base(column, null);
+        }
+
+        public override void bind(Statement stmt, int index) {
+            stmt.bind_null(index);
+        }
+    }
+
+    protected class StringField : Field<string> {
+        public StringField(string value) {
+            base(null, value);
+        }
+
+        public override void bind(Statement stmt, int index) {
+            stmt.bind_text(index, value);
+        }
+    }
+}
+
+}
+\ No newline at end of file