Found another ECJ Annotation Processor Bug

Author: guw

ecj-test/.gitignore

@@ -2,4 +2,5 @@ remotejdk*
 zulu*
 *.jar
 *.tar.gz
-bin/
+bin*/
+src-gen/

ecj-test/compile-proc.params

@@ -0,0 +1,11 @@
+-d
+bin-proc
+-s
+src-gen
+-verbose
+--release
+11
+src-proc/sample/processor/api/GeneratedResourceFamilyDefinition.java
+src-proc/sample/processor/api/WrapperDefinition.java
+src-proc/sample/processor/api/ResourceDefinition.java
+src-proc/sample/processor/GeneratorAnnotationProcessor.java

ecj-test/compile-procsample.params

@@ -0,0 +1,16 @@
+-d
+bin
+-s
+src-gen
+-verbose
+--release
+11
+-processorpath
+bin-proc
+-processor
+sample.processor.GeneratorAnnotationProcessor
+-classpath
+bin-proc
+src/sample/processor/usage/testing/ITestResource.java
+src/sample/processor/usage/checks/ISomeChecks.java
+src/sample/processor/usage/MyResources.java

ecj-test/src-proc/sample/processor/GeneratorAnnotationProcessor.java

@@ -0,0 +1,72 @@
+package sample.processor;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.Set;
+
+import javax.annotation.processing.AbstractProcessor;
+import javax.annotation.processing.RoundEnvironment;
+import javax.annotation.processing.SupportedAnnotationTypes;
+import javax.annotation.processing.SupportedSourceVersion;
+import javax.lang.model.SourceVersion;
+import javax.lang.model.element.Element;
+import javax.lang.model.element.PackageElement;
+import javax.lang.model.element.TypeElement;
+import javax.tools.JavaFileObject;
+
+import sample.processor.api.GeneratedResourceFamilyDefinition;
+
+@SupportedAnnotationTypes({ "sample.processor.api.GeneratedResourceFamilyDefinition",
+		"sample.processor.api.WrapperDefinition", "sample.processor.api.ResourceDefinition" })
+@SupportedSourceVersion(SourceVersion.RELEASE_8)
+public class GeneratorAnnotationProcessor extends AbstractProcessor {
+
+	@Override
+	public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
+
+		for (TypeElement annotation : annotations) {
+			Set<? extends Element> annotatedElements = roundEnv.getElementsAnnotatedWith(annotation);
+
+			for (Element element : annotatedElements) {
+				GeneratedResourceFamilyDefinition annotation2 = element
+						.getAnnotation(GeneratedResourceFamilyDefinition.class);
+				if (annotation2 != null) {
+					String wrapperClassName = annotation2.wrapper().className();
+					if (wrapperClassName == null || wrapperClassName.trim().isEmpty())
+						continue;
+
+					try {
+						writeWrapperFile(wrapperClassName, (TypeElement) element);
+					} catch (IOException e) {
+						throw new IllegalStateException("Unable to generate output. " + e.getMessage(), e);
+					}
+				}
+
+			}
+		}
+
+		return true;
+	}
+
+	private void writeWrapperFile(String simpleClassName, TypeElement annotatedElement) throws IOException {
+		String packageName = ((PackageElement) annotatedElement.getEnclosingElement()).getQualifiedName() + ".wrappers";
+
+		String wrapperClassName = packageName + "." + simpleClassName;
+		JavaFileObject builderFile = processingEnv.getFiler().createSourceFile(wrapperClassName, annotatedElement);
+
+		try (PrintWriter out = new PrintWriter(builderFile.openWriter())) {
+
+			out.print("package ");
+			out.print(packageName);
+			out.println(";");
+			out.println();
+
+			out.print("public class ");
+			out.print(simpleClassName);
+			out.println(" {");
+			out.println();
+
+			out.println("}");
+		}
+	}
+}

ecj-test/src-proc/sample/processor/api/GeneratedResourceFamilyDefinition.java

@@ -0,0 +1,16 @@
+package sample.processor.api;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE})
+public @interface GeneratedResourceFamilyDefinition {
+
+	Class<?> feature();
+
+	WrapperDefinition wrapper() default @WrapperDefinition(className="");
+
+}

ecj-test/src-proc/sample/processor/api/ResourceDefinition.java

@@ -0,0 +1,9 @@
+package sample.processor.api;
+
+public @interface ResourceDefinition {
+
+	Class<?> family();
+
+	String[] checks() default {};
+
+}

ecj-test/src-proc/sample/processor/api/WrapperDefinition.java

@@ -0,0 +1,16 @@
+package sample.processor.api;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface WrapperDefinition {
+
+	/**
+     * name of the wrapper class to generate.
+     */
+    String className();
+}

ecj-test/src/sample/processor/usage/MyResources.java

@@ -0,0 +1,13 @@
+package sample.processor.usage;
+
+import sample.processor.api.GeneratedResourceFamilyDefinition;
+import sample.processor.api.WrapperDefinition;
+import sample.processor.usage.testing.ITestResource;
+
+@GeneratedResourceFamilyDefinition(wrapper = @WrapperDefinition(className = "MyResourceWrapperForTesting"), feature = ITestResource.class)
+public class MyResources {
+
+	public void doSomething() {
+		// whatever
+	}
+}

ecj-test/src/sample/processor/usage/checks/ISomeChecks.java

@@ -0,0 +1,6 @@
+package sample.processor.usage.checks;
+
+public interface ISomeChecks {
+	public final static String CHECK_FOO = "Is Foo Present";
+	public final static String CHECK_BAR = "Is Bar Absent";
+}

ecj-test/src/sample/processor/usage/testing/ITestResource.java

@@ -0,0 +1,19 @@
+package sample.processor.usage.testing;
+
+import sample.processor.api.ResourceDefinition;
+import sample.processor.usage.MyResources;
+import sample.processor.usage.checks.ISomeChecks;
+import sample.processor.usage.wrappers.MyResourceWrapperForTesting;
+
+/**
+ * A Test resource
+ */
+@ResourceDefinition(family = MyResources.class, checks = { ISomeChecks.CHECK_FOO })
+public interface ITestResource {
+
+	/**
+	 * For testing use the generated {@link MyResourceWrapperForTesting}
+	 */
+	String TEST_NAME = "foobar";
+
+}