001 /*
002 * Copyright 2005-2007 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 package javax.annotation.processing;
027
028 import javax.lang.model.element.Element;
029 import javax.lang.model.element.TypeElement;
030 import java.util.Set;
031 import java.lang.annotation.Annotation;
032
033 /**
034 * An annotation processing tool framework will {@linkplain
035 * Processor#process provide an annotation processor with an object
036 * implementing this interface} so that the processor can query for
037 * information about a round of annotation processing.
038 *
039 * @author Joseph D. Darcy
040 * @author Scott Seligman
041 * @author Peter von der Ahé
042 * @version 1.13 07/05/05
043 * @since 1.6
044 */
045 public interface RoundEnvironment {
046 /**
047 * Returns {@code true} if types generated by this round will not
048 * be subject to a subsequent round of annotation processing;
049 * returns {@code false} otherwise.
050 *
051 * @return {@code true} if types generated by this round will not
052 * be subject to a subsequent round of annotation processing;
053 * returns {@code false} otherwise
054 */
055 boolean processingOver();
056
057 /**
058 * Returns {@code true} if an error was raised in the prior round
059 * of processing; returns {@code false} otherwise.
060 *
061 * @return {@code true} if an error was raised in the prior round
062 * of processing; returns {@code false} otherwise
063 */
064 boolean errorRaised();
065
066 /**
067 * Returns the root elements for annotation processing generated
068 * by the prior round.
069 *
070 * @return the root elements for annotation processing generated
071 * by the prior round, or an empty set if there were none
072 */
073 Set<? extends Element> getRootElements();
074
075 /**
076 * Returns the elements annotated with the given annotation type.
077 * The annotation may appear directly or be inherited. Only
078 * package elements and type elements <i>included</i> in this
079 * round of annotation processing, or declarations of members,
080 * constructors, parameters, or type parameters declared within
081 * those, are returned. Included type elements are {@linkplain
082 * #getRootElements root types} and any member types nested within
083 * them. Elements in a package are not considered included simply
084 * because a {@code package-info} file for that package was
085 * created.
086 *
087 * @param a annotation type being requested
088 * @return the elements annotated with the given annotation type,
089 * or an empty set if there are none
090 * @throws IllegalArgumentException if the argument does not
091 * represent an annotation type
092 */
093 Set<? extends Element> getElementsAnnotatedWith(TypeElement a);
094
095 /**
096 * Returns the elements annotated with the given annotation type.
097 * The annotation may appear directly or be inherited. Only
098 * package elements and type elements <i>included</i> in this
099 * round of annotation processing, or declarations of members,
100 * constructors, parameters, or type parameters declared within
101 * those, are returned. Included type elements are {@linkplain
102 * #getRootElements root types} and any member types nested within
103 * them. Elements in a package are not considered included simply
104 * because a {@code package-info} file for that package was
105 * created.
106 *
107 * @param a annotation type being requested
108 * @return the elements annotated with the given annotation type,
109 * or an empty set if there are none
110 * @throws IllegalArgumentException if the argument does not
111 * represent an annotation type
112 */
113 Set<? extends Element> getElementsAnnotatedWith(
114 Class<? extends Annotation> a);
115 }
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