support JSON creation

Author: danthe1st

README.md

@@ -43,20 +43,24 @@ public class TestClass {
 String json= String.join("", Files.readAllLines(Path.of("testClass.json")));
 TestClass obj = TestClassJSONLoader.fromJSON(json);
 System.out.println(obj);
+TestClass testObj=new TestClass();
+testObj.setSomeString("test");
+testObj.someInt=12345;
+System.out.println(TestClassJSONLoader.toJSON(testObj));
 ```
 
 ### Example
 
 An example project can be found in the directory `examples/maven-example`.
 
 * Import `Compile-time JSON-parser` in IntelliJ as a maven project
+* Run `mvn clean install` in that project
 * Expand the `examples/maven-example` directory
 * Right-click on the file `pom.xml` in that directory and select `Add as a Maven Project`
-* Enable annotation processing for this project under `Settings`>`Build, Execution, Deployment`>`Compiler`>`Annotation Processors`>`Enable Annotation Processing`
+* Enable annotation processing for this project under `Settings`>`Build, Execution, Deployment`>`Compiler`>`Annotation Processors`>`Maven default annotation processors profile`>`json-parser-maven-example`>Enable Annotation Processing`
 * Run `TestClass` in `examples/maven-example/src/main/java/io/github/danthe1st/json_compile/test/TestClass`
 
 ### Limitations
 
 * Currently, the only supported data types are `int` and `String`.
 * Eclipse may not detect the annotation processor
-* Converting objects to JSON is currently not supported

examples/maven-example/src/main/java/io/github/danthe1st/json_compile/test/TestClass.java

@@ -33,5 +33,9 @@ public static void main(String[] args) throws IOException {
 		String json= String.join("", Files.readAllLines(Path.of("testClass.json")));
 		TestClass obj = TestClassJSONLoader.fromJSON(json);
 		System.out.println(obj);
+		TestClass testObj=new TestClass();
+		testObj.setSomeString("test");
+		testObj.someInt=12345;
+		System.out.println(TestClassJSONLoader.toJSON(testObj));
 	}
 }

src/main/java/io/github/danthe1st/json_compile/impl/JSONCreator.java

@@ -38,7 +38,7 @@ public class JSONCreator extends AbstractProcessor {
 
 	private static final String JSONOBJECT_PARAM_NAME = "data";
 
-	private static final Map<String, String> simpleAssignments=Map.of("java.lang.String","getString","int","getInt");
+	private static final Map<String, String> simpleAssignments=Map.of("java.lang.String","String","int","Int");
 
 	@Override
 	public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
@@ -114,7 +114,7 @@ private void generateJSON(Element element, String fullyQualidiedClassName, Class
 			TypeMirror type = jsonOperation.getType();
 			String typeName=type.toString();
 			if(simpleAssignments.containsKey(typeName)) {
-				String val=JSONOBJECT_PARAM_NAME+"."+simpleAssignments.get(typeName)+"(\""+jsonOperation.getAttributeName()+"\")";
+				String val=JSONOBJECT_PARAM_NAME+".get"+simpleAssignments.get(typeName)+"(\""+jsonOperation.getAttributeName()+"\")";
 				switch (jsonOperation.getOpType()) {
 				case FIELD:
 					writer.addAssignment("ret."+jsonOperation.getAttributeName(), val);
@@ -123,7 +123,6 @@ private void generateJSON(Element element, String fullyQualidiedClassName, Class
 					writer.addMethodCall("ret","set"+Character.toUpperCase(jsonOperation.getAttributeName().charAt(0))+(jsonOperation.getAttributeName().length()>1?jsonOperation.getAttributeName().substring(1):""),val);
 					break;
 				}
-				
 			}else {
 				processingEnv.getMessager().printMessage(Kind.ERROR, "type "+typeName+" is currenly not supported");
 			}
@@ -138,7 +137,42 @@ private void generateJSON(Element element, String fullyQualidiedClassName, Class
 
 		writer.beginMethod("fromJSON", element.toString(),
 				new VariableDefinition(String.class.getCanonicalName(), JSONOBJECT_PARAM_NAME));
-		writer.addMethodCall(fullyQualidiedClassName,"fromJSON","new JSONObject("+JSONOBJECT_PARAM_NAME+")");
+		writer.addReturn("fromJSON(new "+JSONObject.class.getCanonicalName()+"("+JSONOBJECT_PARAM_NAME+"))");
+		writer.endMethod();
+
+		writer.beginMethod("toJSONObject", JSONObject.class.getCanonicalName(),
+				new VariableDefinition(element.toString(), "obj"));
+
+		writer.addAssignment(JSONObject.class.getCanonicalName()+" "+JSONOBJECT_PARAM_NAME,"new "+JSONObject.class.getCanonicalName()+"()");
+
+		for (JSONOperation jsonOperation : operations) {
+			TypeMirror type = jsonOperation.getType();
+			String typeName=type.toString();
+			if(simpleAssignments.containsKey(typeName)) {
+				String val=null;
+				//=JSONOBJECT_PARAM_NAME+"."+simpleAssignments.get(typeName)+"(\""+jsonOperation.getAttributeName()+"\")";
+				switch (jsonOperation.getOpType()) {
+					case FIELD:
+						val="obj."+jsonOperation.getAttributeName();
+						break;
+					case PROPERTY:
+						val="obj.get"+Character.toUpperCase(jsonOperation.getAttributeName().charAt(0))+(jsonOperation.getAttributeName().length()>1?jsonOperation.getAttributeName().substring(1):"")+"()";
+						break;
+				}
+				if(val!=null){
+					writer.addMethodCall(JSONOBJECT_PARAM_NAME,"put","\""+jsonOperation.getAttributeName()+"\"",val);
+				}
+			}else {
+				processingEnv.getMessager().printMessage(Kind.ERROR, "type "+typeName+" is currenly not supported");
+			}
+			//TODO objects, arrays, primitives
+		}
+		writer.addReturn("data");
+		writer.endMethod();
+
+		writer.beginMethod("toJSON", String.class.getCanonicalName(),
+				new VariableDefinition(element.toString(), "obj"));
+		writer.addReturn("toJSONObject(obj).toString()");
 		writer.endMethod();
 
 		writer.endClass();