Source Code Cross Referenced for JavacRoundEnvironment.java in  » 6.0-JDK-Modules-sun » javac-compiler » com » sun » tools » javac » processing » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules sun » javac compiler » com.sun.tools.javac.processing 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2005-2006 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 com.sun.tools.javac.processing;
027:
028:        import java.lang.annotation.Annotation;
029:        import com.sun.tools.javac.util.*;
030:        import com.sun.tools.javac.comp.*;
031:        import com.sun.tools.javac.tree.JCTree.*;
032:        import javax.annotation.processing.*;
033:        import javax.lang.model.element.*;
034:        import javax.lang.model.type.DeclaredType;
035:        import javax.lang.model.type.TypeMirror;
036:        import javax.lang.model.util.*;
037:        import java.util.*;
038:
039:        /** 
040:         * Object providing state about a prior round of annotation processing.
041:         *
042:         * <p><b>This is NOT part of any API supported by Sun Microsystems.
043:         * If you write code that depends on this, you do so at your own risk.
044:         * This code and its internal interfaces are subject to change or
045:         * deletion without notice.</b>
046:         */
047:        @Version("@(#)JavacRoundEnvironment.java	1.13 07/05/05")
048:        public class JavacRoundEnvironment implements  RoundEnvironment {
049:            // Default equals and hashCode methods are okay.
050:
051:            private final boolean processingOver;
052:            private final boolean errorRaised;
053:            private final ProcessingEnvironment processingEnv;
054:
055:            // Caller must pass in an immutable set
056:            private final Set<? extends Element> rootElements;
057:
058:            JavacRoundEnvironment(boolean processingOver, boolean errorRaised,
059:                    Set<? extends Element> rootElements,
060:                    ProcessingEnvironment processingEnv) {
061:                this .processingOver = processingOver;
062:                this .errorRaised = errorRaised;
063:                this .rootElements = rootElements;
064:                this .processingEnv = processingEnv;
065:            }
066:
067:            public String toString() {
068:                return String.format(
069:                        "[errorRaised=%b, rootElements=%s, processingOver=%b]",
070:                        errorRaised, rootElements, processingOver);
071:            }
072:
073:            public boolean processingOver() {
074:                return processingOver;
075:            }
076:
077:            /**
078:             * Returns {@code true} if an error was raised in the prior round
079:             * of processing; returns {@code false} otherwise.
080:             * 
081:             * @return {@code true} if an error was raised in the prior round
082:             * of processing; returns {@code false} otherwise.
083:             */
084:            public boolean errorRaised() {
085:                return errorRaised;
086:            }
087:
088:            /**
089:             * Returns the type elements specified by the prior round.
090:             *
091:             * @return the types elements specified by the prior round, or an
092:             * empty set if there were none
093:             */
094:            public Set<? extends Element> getRootElements() {
095:                return rootElements;
096:            }
097:
098:            private static final String NOT_AN_ANNOTATION_TYPE = "The argument does not represent an annotation type: ";
099:
100:            /**
101:             * Returns the elements annotated with the given annotation type.
102:             * Only type elements <i>included</i> in this round of annotation
103:             * processing, or declarations of members, parameters, or type
104:             * parameters declared within those, are returned.  Included type
105:             * elements are {@linkplain #getSpecifiedTypeElements specified
106:             * types} and any types nested within them.
107:             *
108:             * @param a  annotation type being requested
109:             * @return the elements annotated with the given annotation type,
110:             * or an empty set if there are none
111:             */
112:            public Set<? extends Element> getElementsAnnotatedWith(TypeElement a) {
113:                Set<Element> result = Collections.emptySet();
114:                if (a.getKind() != ElementKind.ANNOTATION_TYPE)
115:                    throw new IllegalArgumentException(NOT_AN_ANNOTATION_TYPE
116:                            + a);
117:
118:                DeclaredType annotationTypeElement;
119:                TypeMirror tm = a.asType();
120:                if (tm instanceof  DeclaredType)
121:                    annotationTypeElement = (DeclaredType) a.asType();
122:                else
123:                    throw new AssertionError("Bad implementation type for "
124:                            + tm);
125:
126:                ElementScanner6<Set<Element>, DeclaredType> scanner = new AnnotationSetScanner(
127:                        result);
128:
129:                for (Element element : rootElements)
130:                    result = scanner.scan(element, annotationTypeElement);
131:
132:                return result;
133:            }
134:
135:            // Could be written as a local class inside getElementsAnnotatedWith
136:            private class AnnotationSetScanner extends
137:                    ElementScanner6<Set<Element>, DeclaredType> {
138:                // Insertion-order preserving set
139:                Set<Element> annotatedElements = new LinkedHashSet<Element>();
140:
141:                AnnotationSetScanner(Set<Element> defaultSet) {
142:                    super (defaultSet);
143:                }
144:
145:                @Override
146:                public Set<Element> scan(Element e, DeclaredType p) {
147:                    java.util.List<? extends AnnotationMirror> annotationMirrors = processingEnv
148:                            .getElementUtils().getAllAnnotationMirrors(e);
149:                    for (AnnotationMirror annotationMirror : annotationMirrors) {
150:                        if (annotationMirror.getAnnotationType().equals(p))
151:                            annotatedElements.add(e);
152:                    }
153:                    e.accept(this , p);
154:                    return annotatedElements;
155:                }
156:
157:            }
158:
159:            /**
160:             * {@inheritdoc}
161:             */
162:            public Set<? extends Element> getElementsAnnotatedWith(
163:                    Class<? extends Annotation> a) {
164:                if (!a.isAnnotation())
165:                    throw new IllegalArgumentException(NOT_AN_ANNOTATION_TYPE
166:                            + a);
167:                String name = a.getCanonicalName();
168:                if (name == null)
169:                    return Collections.emptySet();
170:                else {
171:                    TypeElement annotationType = processingEnv
172:                            .getElementUtils().getTypeElement(name);
173:                    if (annotationType == null)
174:                        return Collections.emptySet();
175:                    else
176:                        return getElementsAnnotatedWith(annotationType);
177:                }
178:            }
179:        }
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