langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacRoundEnvironment.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacRoundEnvironment.java Sun Aug 17 15:52:32 2014 +0100
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.tools.javac.processing;
+
+import java.lang.annotation.Annotation;
+import javax.annotation.processing.*;
+import javax.lang.model.element.*;
+import javax.lang.model.util.*;
+import java.util.*;
+
+/**
+ * Object providing state about a prior round of annotation processing.
+ *
+ * <p>The methods in this class do not take type annotations into account,
+ * as target types, not java elements.
+ *
+ * <p><b>This is NOT part of any supported API.
+ * If you write code that depends on this, you do so at your own risk.
+ * This code and its internal interfaces are subject to change or
+ * deletion without notice.</b>
+ */
+public class JavacRoundEnvironment implements RoundEnvironment {
+ // Default equals and hashCode methods are okay.
+
+ private final boolean processingOver;
+ private final boolean errorRaised;
+ private final ProcessingEnvironment processingEnv;
+
+ // Caller must pass in an immutable set
+ private final Set<? extends Element> rootElements;
+
+ JavacRoundEnvironment(boolean processingOver,
+ boolean errorRaised,
+ Set<? extends Element> rootElements,
+ ProcessingEnvironment processingEnv) {
+ this.processingOver = processingOver;
+ this.errorRaised = errorRaised;
+ this.rootElements = rootElements;
+ this.processingEnv = processingEnv;
+ }
+
+ public String toString() {
+ return String.format("[errorRaised=%b, rootElements=%s, processingOver=%b]",
+ errorRaised,
+ rootElements,
+ processingOver);
+ }
+
+ public boolean processingOver() {
+ return processingOver;
+ }
+
+ /**
+ * Returns {@code true} if an error was raised in the prior round
+ * of processing; returns {@code false} otherwise.
+ *
+ * @return {@code true} if an error was raised in the prior round
+ * of processing; returns {@code false} otherwise.
+ */
+ public boolean errorRaised() {
+ return errorRaised;
+ }
+
+ /**
+ * Returns the type elements specified by the prior round.
+ *
+ * @return the types elements specified by the prior round, or an
+ * empty set if there were none
+ */
+ public Set<? extends Element> getRootElements() {
+ return rootElements;
+ }
+
+ private static final String NOT_AN_ANNOTATION_TYPE =
+ "The argument does not represent an annotation type: ";
+
+ /**
+ * Returns the elements annotated with the given annotation type.
+ * Only type elements <i>included</i> in this round of annotation
+ * processing, or declarations of members, parameters, or type
+ * parameters declared within those, are returned. Included type
+ * elements are {@linkplain #getRootElements specified
+ * types} and any types nested within them.
+ *
+ * @param a annotation type being requested
+ * @return the elements annotated with the given annotation type,
+ * or an empty set if there are none
+ */
+ public Set<? extends Element> getElementsAnnotatedWith(TypeElement a) {
+ Set<Element> result = Collections.emptySet();
+ if (a.getKind() != ElementKind.ANNOTATION_TYPE)
+ throw new IllegalArgumentException(NOT_AN_ANNOTATION_TYPE + a);
+
+ ElementScanner9<Set<Element>, TypeElement> scanner =
+ new AnnotationSetScanner(result);
+
+ for (Element element : rootElements)
+ result = scanner.scan(element, a);
+
+ return result;
+ }
+
+ // Could be written as a local class inside getElementsAnnotatedWith
+ private class AnnotationSetScanner extends
+ ElementScanner9<Set<Element>, TypeElement> {
+ // Insertion-order preserving set
+ Set<Element> annotatedElements = new LinkedHashSet<>();
+
+ AnnotationSetScanner(Set<Element> defaultSet) {
+ super(defaultSet);
+ }
+
+ @Override
+ public Set<Element> visitType(TypeElement e, TypeElement p) {
+ // Type parameters are not considered to be enclosed by a type
+ scan(e.getTypeParameters(), p);
+ return super.visitType(e, p);
+ }
+
+ @Override
+ public Set<Element> visitExecutable(ExecutableElement e, TypeElement p) {
+ // Type parameters are not considered to be enclosed by an executable
+ scan(e.getTypeParameters(), p);
+ return super.visitExecutable(e, p);
+ }
+
+ @Override
+ public Set<Element> scan(Element e, TypeElement p) {
+ java.util.List<? extends AnnotationMirror> annotationMirrors =
+ processingEnv.getElementUtils().getAllAnnotationMirrors(e);
+ for (AnnotationMirror annotationMirror : annotationMirrors) {
+ if (p.equals(annotationMirror.getAnnotationType().asElement()))
+ annotatedElements.add(e);
+ }
+ e.accept(this, p);
+ return annotatedElements;
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public Set<? extends Element> getElementsAnnotatedWith(Class<? extends Annotation> a) {
+ if (!a.isAnnotation())
+ throw new IllegalArgumentException(NOT_AN_ANNOTATION_TYPE + a);
+ String name = a.getCanonicalName();
+ if (name == null)
+ return Collections.emptySet();
+ else {
+ TypeElement annotationType = processingEnv.getElementUtils().getTypeElement(name);
+ if (annotationType == null)
+ return Collections.emptySet();
+ else
+ return getElementsAnnotatedWith(annotationType);
+ }
+ }
+}