org.tentackle.fx.apt.FxControllerServiceAnnotationProcessor Maven / Gradle / Ivy
/*
* Tentackle - https://tentackle.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.tentackle.fx.apt;
import org.tentackle.apt.AbstractServiceAnnotationProcessor;
import org.tentackle.common.AnnotationProcessor;
import org.tentackle.fx.FxControllerService;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.ExecutableType;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.type.TypeVisitor;
import javax.lang.model.util.SimpleTypeVisitor8;
import javax.tools.Diagnostic;
import java.util.List;
import java.util.Set;
/**
* Annotation processor for the {@code @FxControllerService} annotation.
*
* @author harald
*/
@SupportedAnnotationTypes("org.tentackle.fx.FxControllerService")
@AnnotationProcessor
public class FxControllerServiceAnnotationProcessor extends AbstractServiceAnnotationProcessor {
@Override
public boolean process(Set annotations, RoundEnvironment roundEnv) {
if (!roundEnv.processingOver()) {
for (TypeElement type: annotations) {
for (Element element : roundEnv.getElementsAnnotatedWith(type)) {
processClass(element);
}
}
}
return true; // claim annotation
}
@Override
protected void processClass(Element element) {
super.processClass(element);
FxControllerService fxControllerService = element.getAnnotation(FxControllerService.class);
if (!FxControllerService.FXML_NONE.equals(fxControllerService.url()) ||
FxControllerService.RESOURCES_NONE.equals(fxControllerService.resources())) {
// loaded by FXML or instantiated without resourcebundle
if (!verifyConstructor(element, noArgsVisitor)) {
processingEnv.getMessager().printMessage(
Diagnostic.Kind.ERROR,
"class " + element + " needs a no-args constructor", element);
}
}
else {
// programmatically instantiated with resourcebundle
if (!verifyConstructor(element, resourceBundleVisitor)) {
processingEnv.getMessager().printMessage(
Diagnostic.Kind.ERROR,
"class " + element + " needs constructor (ResourceBundle)", element);
}
}
verifyImplements(element, "org.tentackle.fx.FxController");
}
private final TypeVisitor resourceBundleVisitor = new SimpleTypeVisitor8<>() {
@Override
public Boolean visitExecutable(ExecutableType t, Void v) {
List typeList = t.getParameterTypes();
return typeList.size() == 1 &&
// m.accept does not work with ResourceBundle.class
typeUtils.erasure(typeList.get(0)).toString().equals("java.util.ResourceBundle");
}
};
}