Simplify LinkageProcessor

src/de/steamwar/linkage/LinkageProcessor.java

@@ -28,7 +28,10 @@ import lombok.SneakyThrows;
 
 import javax.annotation.processing.*;
 import javax.lang.model.SourceVersion;
-import javax.lang.model.element.*;
+import javax.lang.model.element.ElementKind;
+import javax.lang.model.element.Modifier;
+import javax.lang.model.element.TypeElement;
+import javax.lang.model.element.VariableElement;
 import javax.lang.model.type.DeclaredType;
 import javax.lang.model.type.TypeMirror;
 import javax.tools.Diagnostic;
@@ -116,25 +119,23 @@ public class LinkageProcessor extends AbstractProcessor {
 
         BuildPlan buildPlan = new BuildPlan(packageName, className);
 
-        Set<? extends Element> elements = roundEnv.getElementsAnnotatedWith(Linked.class);
+        Set<TypeElement> elements = roundEnv.getElementsAnnotatedWith(Linked.class).stream()
+                .filter(element -> element.getKind() == ElementKind.CLASS)
+                .map(TypeElement.class::cast)
+                .collect(Collectors.toSet());
+
         Map<String, TypeElement> neededFields = new HashMap<>();
         Set<Runnable> fieldInjections = new HashSet<>();
-        for (Element element : elements) {
-            if (element.getKind() != ElementKind.CLASS) {
-                continue;
-            }
-            TypeElement typeElement = (TypeElement) element;
-            Linked linked = element.getAnnotation(Linked.class);
-            if (linked == null) {
-                continue;
-            }
+        for (TypeElement typeElement : elements) {
             if (getLinkagesOfType(typeElement).size() > 1) {
                 neededFields.put(typeElement.getQualifiedName().toString(), typeElement);
             }
 
-            List<VariableElement> variableElements = typeElement.getEnclosedElements().stream().filter(e -> e.getKind() == ElementKind.FIELD).map(VariableElement.class::cast).filter(e -> {
-                return e.getAnnotation(LinkedInstance.class) != null;
-            }).collect(Collectors.toList());
+            List<VariableElement> variableElements = typeElement.getEnclosedElements().stream()
+                    .filter(e -> e.getKind() == ElementKind.FIELD)
+                    .map(VariableElement.class::cast)
+                    .filter(e -> e.getAnnotation(LinkedInstance.class) != null)
+                    .collect(Collectors.toList());
             if (variableElements.isEmpty()) {
                 continue;
             }
@@ -177,12 +178,7 @@ public class LinkageProcessor extends AbstractProcessor {
         fieldInjections.forEach(Runnable::run);
 
         Map<String, MethodBuilder> methods = new HashMap<>();
-        for (Element element : elements) {
-            if (element.getKind() != ElementKind.CLASS) {
-                continue;
-            }
-            TypeElement typeElement = (TypeElement) element;
-
+        for (TypeElement typeElement : elements) {
             System.out.println("Found element: " + typeElement.getQualifiedName().toString());
             Map<String, List<LinkageType>> linkages = getLinkagesOfType(typeElement);
             if (linkages.isEmpty()) {
@@ -211,11 +207,11 @@ public class LinkageProcessor extends AbstractProcessor {
     }
 
     private String getElement(TypeElement typeElement, Map<String, TypeElement> neededFields) {
+        String s = typeElement.getSimpleName().toString();
         if (neededFields.containsKey(typeElement.getQualifiedName().toString())) {
-            String s = typeElement.getSimpleName().toString();
             return s.substring(0, 1).toLowerCase() + s.substring(1);
         }
-        return "new " + typeElement.getSimpleName().toString() + "()";
+        return "new " + s + "()";
     }
 
     private void specialElements(TypeElement typeElement, BuildPlan buildPlan, Consumer<String> stringConsumer, Runnable inner) {