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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2007-2017 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://oss.oracle.com/licenses/CDDL+GPL-1.1
* or LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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*/
package com.sun.enterprise.tools.apt;
import org.glassfish.hk2.api.Metadata;
import org.jvnet.hk2.component.MultiMap;
import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.AnnotationValue;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.ElementFilter;
import java.lang.annotation.Annotation;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
/**
* Discoveres all {@link InhabitantMetadata} and puts them into the bag.
*
* @author Kohsuke Kawaguchi
*/
public class InhabitantMetadataProcessor extends TypeHierarchyVisitor> {
private final Map models = new HashMap();
/**
* For a particular {@link DeclaredType}, remember what properties are to be added as metadata.
*/
private static final class Model {
private final DeclaredType type;
private final Map metadataProperties = new HashMap();
public Model(DeclaredType type) {
this.type = type;
for (ExecutableElement e : ElementFilter.methodsIn(type.asElement().getEnclosedElements())) {
Metadata im = e.getAnnotation(Metadata.class);
if(im==null) continue;
String name = im.value();
if (name.length() == 0) name = ((TypeElement) type.asElement()).getQualifiedName().toString() + '.' + e.getSimpleName();
metadataProperties.put(e,name);
}
}
/**
* Based on the model, parse the annotation mirror and updates the metadata bag by adding
* discovered values.
*/
public void parse(AnnotationMirror a, MultiMap metadataBag) {
assert a.getAnnotationType().equals(type);
for (Map.Entry e : metadataProperties.entrySet()) {
Map vals = a.getElementValues();
AnnotationValue value = vals.get(e.getKey());
if (value!=null) {
metadataBag.add(e.getValue(), toString(value));
} else {
Collection methods = ElementFilter.methodsIn(a.getAnnotationType().asElement().getEnclosedElements());
for (ExecutableElement decl : methods) {
if (e.getKey().equals(decl)) {
value = decl.getDefaultValue();
metadataBag.add(e.getValue(), toString(value));
break;
}
}
}
}
}
private String toString(AnnotationValue value) {
if (value.getValue() instanceof TypeMirror) {
TypeMirror tm = (TypeMirror) value.getValue();
if (tm.getKind().equals(TypeKind.DECLARED)) {
DeclaredType dt = (DeclaredType) tm;
return getClassName((TypeElement) dt.asElement());
}
}
return value.toString();
}
/**
* Returns the fully qualified class name.
* The difference between this and {@link TypeElement#getQualifiedName()}
* is that this method returns the same format as {@link Class#getName()}.
*
* Notably, separator for nested classes is '$', not '.'
*/
private String getClassName(TypeElement d) {
if (d.getEnclosingElement() != null)
return getClassName((TypeElement) d.getEnclosingElement()) + '$' + d.getSimpleName();
else
return d.getQualifiedName().toString();
}
}
public MultiMap process(TypeElement d) {
visited.clear();
MultiMap r = new MultiMap();
check(d,r);
return r;
}
protected void check(TypeElement d, MultiMap result) {
checkAnnotations(d, result);
super.check(d,result);
}
private void checkAnnotations(TypeElement d, MultiMap result) {
for (AnnotationMirror a : d.getAnnotationMirrors()) {
getModel(a.getAnnotationType()).parse(a,result);
// check meta-annotations
for (AnnotationMirror b : a.getAnnotationType().asElement().getAnnotationMirrors()) {
getModel(b.getAnnotationType()).parse(b,result);
}
}
}
/**
* Checks if the given annotation mirror has the given meta-annotation on it.
*/
/*private boolean hasMetaAnnotation(AnnotationMirror a, Class type) {
return a.getAnnotationType().asElement().getAnnotation(type) != null;
}*/
private Model getModel(DeclaredType type) {
Model model = models.get(type);
if(model==null)
models.put(type,model=new Model(type));
return model;
}
}