- added toMinimalPrintString()

- added db reflection

README.md

@@ -60,9 +60,14 @@ Person.whereName().is("John").remove(); // Removes all rows where the name equal
 
 ## Overview
 
-### ⚡️ 0% boilerplate, minimal code, fast development and prototyping via GUI
-### ⚡️ Compile-/Typesafe SQL queries via WHERE class
-### ⚡️ Various utility methods, like fetching results lazily
+### ⚡️ Low code
+#### Fast development and prototyping due to 0% boilerplate and developer friendly API
+
+### ⚡️ Bug and SQL safety
+#### Compile-/Typesafe SQL queries via WHERE class
+
+### ⚡️ Powerful API
+#### Extensive utility methods, like fetching results lazily and DB reflection
 
 #### How does it work?
 Generates one class for each table.
@@ -115,6 +120,8 @@ to the database directly could result in issues.
 - (Optional) Supports generating Vaadin Flow Form to create/update/delete each object/row.
 - The Vaadin Flow form also supports references to other tables (your field must be named `<table>Id` for example `personId`), meaning it will create a ComboBox that displays the object/row as string instead of only the id
 which also contains all the rows of that table and allows the user to change it.
+- DB "Reflection", meaning you can access table names, their columns, definitions and
+even execute get/add/update/delete in the generated database class.
 
 ### 🔴 Cons / Todo
 PRs for these issues are greatly appreciated (sorted from most important, to least important).

src/main/java/com/osiris/jsqlgen/generator/GenDatabaseFile.java

@@ -43,7 +43,28 @@ public static void s(Database db, File databaseFile, String rawUrl, String url,
             int latestTableVersion = t.changes.size(); // TODO t.changes has not latest change included at this point yet
             // TODO since this gets generated before the tables get generated.
             // id, tableVersion, steps
-            s.append("new TableMetaData("+t.id+", "+latestTableVersion+", 0)");
+            s.append("new TableMetaData("+t.id+", "+latestTableVersion+", 0, \""+t.name+"\", ");
+            s.append("new String[]{");
+            for (int j = 0; j < t.columns.size(); j++) {
+                s.append("\""+t.columns.get(j).name+"\"");
+                if(j != t.columns.size() - 1) s.append(", ");
+            }
+            s.append("}, new String[]{");
+            for (int j = 0; j < t.columns.size(); j++) {
+                s.append("\""+t.columns.get(j).definition+"\"");
+                if(j != t.columns.size() - 1) s.append(", ");
+            }
+            s.append("})");
+
+            // Create overriding methods
+            s.append("{");
+            s.append("public Class<?> getTableClass(){return "+t.name+".class;}");
+            s.append("public List<Database.Row> get(){List<Database.Row> l = new ArrayList<>(); for("+t.name+" obj : "+t.name+".get()) l.add(obj); return l;}");
+            s.append("public Database.Row get(int i){return "+t.name+".get(i);}");
+            s.append("public void update(Database.Row obj){"+t.name+".update(("+ t.name +")obj);}");
+            s.append("public void add(Database.Row obj){"+t.name+".add(("+ t.name +")obj);}");
+            s.append("public void remove(Database.Row obj){"+t.name+".remove(("+ t.name +")obj);}");
+            s.append("}");
 
             if(i != tables.size() - 1) s.append(", ");
         }
@@ -148,7 +169,14 @@ public static void s(Database db, File databaseFile, String rawUrl, String url,
                 "    }\n" +
                 "" +
                 "    public static TableMetaData getTableMetaData(int tableId) {\n" +
-                "        TableMetaData t = new TableMetaData(tableId, 0, 0);\n" + // tableId, tableVersion, steps
+                "        TableMetaData t = null;\n" +
+                "        for (TableMetaData t_ : tables) {\n" +
+                "            if(t_.id == tableId){\n" +
+                "                t = t_;\n" +
+                "                break;\n" +
+                "            }\n" +
+                "        }\n" +
+                "        Objects.requireNonNull(t);\n" +
                 "        try (Connection c = DriverManager.getConnection(Database.url, Database.username, Database.password);\n" +
                 "             Statement s = c.createStatement()) {\n" +
                 "            try (ResultSet rs = s.executeQuery(\"SELECT `tableId`,`tableVersion`,`steps`\" +\n" +
@@ -204,17 +232,39 @@ public static void s(Database db, File databaseFile, String rawUrl, String url,
                 "            System.err.println(\"Something went really wrong during database initialisation, program will exit.\");\n" +
                 "            System.exit(1);\n" +
                 "        }\n" +
+                "\n" +
+                "        // Implementations for the following methods are provided in the array initialisation of 'tables'\n" +
+                "\n" +
+                "        public Class<?> getTableClass(){throw new RuntimeException(\"Not implemented!\");}\n" + // Class is not provided as field to prevent static constructor execution
+                "        public List<Database.Row> get(){throw new RuntimeException(\"Not implemented!\");}\n" +
+                "        public Database.Row get(int i){throw new RuntimeException(\"Not implemented!\");}\n" +
+                "        public void update(Database.Row obj){throw new RuntimeException(\"Not implemented!\");}\n" +
+                "        public void add(Database.Row obj){throw new RuntimeException(\"Not implemented!\");}\n" +
+                "        public void remove(Database.Row obj){throw new RuntimeException(\"Not implemented!\");}\n" +
+                "    }\n" +
+                "    public interface Row<T extends Row>{\n" +
+                "        T update();\n" +
+                "        T add();\n" +
+                "        T remove();\n" +
+                "        String toPrintString();\n" +
+                "        String toMinimalPrintString();\n" +
                 "    }\n" +
                 "\n" +
                 "    public static class TableMetaData {\n" +
                 "        public int id;\n" +
                 "        public int version;\n" +
                 "        public int steps;\n" +
+                "        public String name;\n" +
+                "        public String[] columns;\n" +
+                "        public String[] definitions;\n" +
                 "\n" +
-                "        public TableMetaData(int id, int version, int steps) {\n" +
+                "        public TableMetaData(int id, int version, int steps, String name, String[] columns, String[] definitions) {\n" +
                 "            this.id = id;\n" +
                 "            this.version = version;\n" +
                 "            this.steps = steps;\n" +
+                "            this.name = name;\n" +
+                "            this.columns = columns;\n" +
+                "            this.definitions = definitions;\n" +
                 "        }\n" +
                 "    }\n");
         for (Table t : tables) {

src/main/java/com/osiris/jsqlgen/generator/GenVaadinFlow.java

@@ -103,18 +103,10 @@ public static String s(Database db, Table t, LinkedHashSet<String> importsList)
                     s.append("        {"+fieldName+".setItems("+refTable.name+".get());\n" +
                             "            "+fieldName+".setRenderer(new ComponentRenderer<>(obj -> {\n" +
                             "                Div div = new Div();\n"+
-                            "                div.setText(");
-                    String valAsString = "\"\"+";
-                    for (Column refCol : refTable.columns) {
-                        if (refCol.type.isBlob() || refCol.type.isDateOrTime()) continue;
-                        valAsString += "obj." + refCol.name;
-                        valAsString += "+\"; \"+";
-                    }
-                    valAsString += "\"\"";
-                    s.append(valAsString + ");\n" +
+                            "                div.setText(obj.toMinimalPrintString());\n" +
                             "            return div;}));\n" +
                             "            "+fieldName+".setItemLabelGenerator(obj -> {\n" +
-                            "                return "+valAsString+";\n" +
+                            "                return obj.toMinimalPrintString();\n" +
                             "            });\n" +
                             "        }\n");
                 } else{

src/main/java/com/osiris/jsqlgen/generator/JavaCodeGenerator.java

@@ -114,7 +114,7 @@ public static String generateTableFile(File oldGeneratedClass, Table t, Database
         }
         classContentBuilder.append(
                 "*/\n" +
-                        "public class " + t.name + "{\n"); // Open class
+                        "public class " + t.name + " implements Database.Row<"+t.name+">{\n"); // Open class
 
         classContentBuilder.append("// The code below will not be removed when re-generating this class.\n");
 
@@ -407,6 +407,16 @@ else if (line.contains("// Additional code start ->")) {
         classContentBuilder.substring(0, classContentBuilder.length() - 1);
         classContentBuilder.append(";\n}\n");
 
+        classContentBuilder.append("public String toMinimalPrintString(){\n");
+        String valAsString = "\"\"+";
+        for (Column refCol : t.columns) {
+            if (refCol.type.isBlob() || refCol.type.isDateOrTime()) continue;
+            valAsString += "this." + refCol.name;
+            valAsString += "+\"; \"+";
+        }
+        valAsString += "\"\"";
+        classContentBuilder.append("return "+valAsString+";\n}\n");
+
         // CREATE OBJ TOVAADINCOMPONENT METHOD
         if (t.isVaadinFlowUI)
             classContentBuilder.append(GenVaadinFlow.s(db, t, importsList));