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A repackaged copy of javac for Error Prone to depend on
/*
* Copyright (c) 2005, 2017, 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 javax.annotation.processing;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import java.util.LinkedHashSet;
import java.util.Collections;
import java.util.Set;
import java.lang.annotation.Annotation;
/**
* An annotation processing tool framework will {@linkplain
* Processor#process provide an annotation processor with an object
* implementing this interface} so that the processor can query for
* information about a round of annotation processing.
*
* @author Joseph D. Darcy
* @author Scott Seligman
* @author Peter von der Ahé
* @since 1.6
*/
public interface RoundEnvironment {
/**
* Returns {@code true} if types generated by this round will not
* be subject to a subsequent round of annotation processing;
* returns {@code false} otherwise.
*
* @return {@code true} if types generated by this round will not
* be subject to a subsequent round of annotation processing;
* returns {@code false} otherwise
*/
boolean 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
*/
boolean errorRaised();
/**
* Returns the {@linkplain Processor root elements} for annotation processing generated
* by the prior round.
*
* @return the root elements for annotation processing generated
* by the prior round, or an empty set if there were none
*/
Set getRootElements();
/**
* Returns the elements annotated with the given annotation type.
* The annotation may appear directly or be inherited. Only
* package elements, module elements, and type elements included in this
* round of annotation processing, or declarations of members,
* constructors, parameters, or type parameters declared within
* those, are returned. Included type elements are {@linkplain
* #getRootElements root types} and any member types nested within
* them. Elements of a package are not considered included simply
* because a {@code package-info} file for that package was
* created.
* Likewise, elements of a module are not considered included
* simply because a {@code module-info} file for that module was
* created
*
* @param a annotation type being requested
* @return the elements annotated with the given annotation type,
* or an empty set if there are none
* @throws IllegalArgumentException if the argument does not
* represent an annotation type
*/
Set getElementsAnnotatedWith(TypeElement a);
/**
* Returns the elements annotated with one or more of the given
* annotation types.
*
* @apiNote This method may be useful when processing repeating
* annotations by looking for an annotation type and its
* containing annotation type at the same time.
*
* @implSpec The default implementation of this method creates an
* empty result set, iterates over the annotations in the argument
* array calling {@link #getElementsAnnotatedWith(TypeElement)} on
* each annotation and adding those results to the result
* set. Finally, the contents of the result set are returned as an
* unmodifiable set.
*
* @param annotations annotation types being requested
* @return the elements annotated with one or more of the given
* annotation types, or an empty set if there are none
* @throws IllegalArgumentException if the any elements of the
* argument set do not represent an annotation type
* @jls 9.6.3 Repeatable Annotation Types
* @since 9
*/
default Set getElementsAnnotatedWithAny(TypeElement... annotations){
// Use LinkedHashSet rather than HashSet for predictability
Set result = new LinkedHashSet<>();
for (TypeElement annotation : annotations) {
result.addAll(getElementsAnnotatedWith(annotation));
}
return Collections.unmodifiableSet(result);
}
/**
* Returns the elements annotated with the given annotation type.
* The annotation may appear directly or be inherited. Only
* package elements, module elements, and type elements included in this
* round of annotation processing, or declarations of members,
* constructors, parameters, or type parameters declared within
* those, are returned. Included type elements are {@linkplain
* #getRootElements root types} and any member types nested within
* them. Elements in a package are not considered included simply
* because a {@code package-info} file for that package was
* created.
* Likewise, elements of a module are not considered included
* simply because a {@code module-info} file for that module was
* created
*
* @param a annotation type being requested
* @return the elements annotated with the given annotation type,
* or an empty set if there are none
* @throws IllegalArgumentException if the argument does not
* represent an annotation type
*/
Set getElementsAnnotatedWith(Class a);
/**
* Returns the elements annotated with one or more of the given
* annotation types.
*
* @apiNote This method may be useful when processing repeating
* annotations by looking for an annotation type and its
* containing annotation type at the same time.
*
* @implSpec The default implementation of this method creates an
* empty result set, iterates over the annotations in the argument
* set calling {@link #getElementsAnnotatedWith(Class)} on
* each annotation and adding those results to the result
* set. Finally, the contents of the result set are returned as an
* unmodifiable set.
*
* @param annotations annotation types being requested
* @return the elements annotated with one or more of the given
* annotation types, or an empty set if there are none
* @throws IllegalArgumentException if the any elements of the
* argument set do not represent an annotation type
* @jls 9.6.3 Repeatable Annotation Types
* @since 9
*/
default Set getElementsAnnotatedWithAny(Set> annotations){
// Use LinkedHashSet rather than HashSet for predictability
Set result = new LinkedHashSet<>();
for (Class annotation : annotations) {
result.addAll(getElementsAnnotatedWith(annotation));
}
return Collections.unmodifiableSet(result);
}
}