org.jboss.weld.resolution.QualifierInstance Maven / Gradle / Ivy
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* Copyright 2010, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.weld.resolution;
import java.lang.annotation.Annotation;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
import java.util.Collections;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import javax.enterprise.inject.Any;
import javax.enterprise.inject.Default;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.Bean;
import javax.inject.Named;
import org.jboss.weld.bean.RIBean;
import org.jboss.weld.logging.ResolutionLogger;
import org.jboss.weld.metadata.cache.MetaAnnotationStore;
import org.jboss.weld.metadata.cache.QualifierModel;
import org.jboss.weld.security.SetAccessibleAction;
import org.jboss.weld.util.collections.ImmutableMap;
import org.jboss.weld.util.collections.ImmutableSet;
import org.jboss.weld.util.reflection.Formats;
/**
* Optimized representation of a qualifier. JDK annotation proxies are slooow, this class provides significantly faster equals/hashCode methods, that also
* correctly handle non binding attributes.
*
* Note that Weld is using this representation for interceptor bindings as well. See also
* {@link org.jboss.weld.manager.BeanManagerImpl#resolveInterceptors(javax.enterprise.inject.spi.InterceptionType, java.util.Collection)}
*
* @author Stuart Douglas
* @author Martin Kouba
*/
public class QualifierInstance {
public static final QualifierInstance ANY = new QualifierInstance(Any.class);
public static final QualifierInstance DEFAULT = new QualifierInstance(Default.class);
private final Class annotationClass;
private final Map values;
private final int hashCode;
public static Set of(Set qualifiers, MetaAnnotationStore store) {
if (qualifiers.isEmpty()) {
return Collections.emptySet();
}
final ImmutableSet.Builder ret = ImmutableSet.builder();
for (Annotation a : qualifiers) {
ret.add(QualifierInstance.of(a, store));
}
return ret.build();
}
public static Set of(Bean bean, MetaAnnotationStore store) {
if (bean instanceof RIBean) {
return ((RIBean) bean).getQualifierInstances();
}
return of(bean.getQualifiers(), store);
}
/**
* @param annotation
* @param store
* @return a new qualifier instance for the given annotation
*/
public static QualifierInstance of(Annotation annotation, MetaAnnotationStore store) {
Class annotationType = annotation.annotationType();
if (Any.class == annotationType) {
return ANY;
} else if (Default.class == annotationType) {
return DEFAULT;
} else if (Named.class == annotationType) {
Named named = (Named) annotation;
return new QualifierInstance(annotationType, ImmutableMap.of("value", named.value()));
} else {
return new QualifierInstance(annotationType, createValues(annotation, store));
}
}
private QualifierInstance(final Class annotationClass) {
this(annotationClass, Collections.emptyMap());
}
/**
* Constructs a qualifier instance without any checks. This method should be used with care.
*
* @param annotationClass
* @param values
* @see QualifierInstance#of(Annotation, MetaAnnotationStore)
* @see QualifierInstance#of(Bean, MetaAnnotationStore)
*/
public QualifierInstance(Class annotationClass, Map values) {
this.annotationClass = annotationClass;
this.values = values;
this.hashCode = Objects.hash(annotationClass, values);
}
private static Map createValues(final Annotation instance, final MetaAnnotationStore store) {
final Class annotationClass = instance.annotationType();
final QualifierModel model = store.getBindingTypeModel(annotationClass);
if (model.getAnnotatedAnnotation().getMethods().size() == 0) {
return Collections.emptyMap();
}
final ImmutableMap.Builder builder = ImmutableMap.builder();
for (final AnnotatedMethod method : model.getAnnotatedAnnotation().getMethods()) {
if (!model.getNonBindingMembers().contains(method)) {
try {
if (System.getSecurityManager() != null) {
AccessController.doPrivileged(SetAccessibleAction.of(method.getJavaMember()));
} else {
method.getJavaMember().setAccessible(true);
}
builder.put(method.getJavaMember().getName(), method.getJavaMember().invoke(instance));
} catch (IllegalAccessException | InvocationTargetException | IllegalArgumentException e) {
throw ResolutionLogger.LOG.cannotCreateQualifierInstanceValues(instance, Formats.formatAsStackTraceElement(method.getJavaMember()), e);
}
}
}
return builder.build();
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
final QualifierInstance that = (QualifierInstance) o;
if (!annotationClass.equals(that.annotationClass)) {
return false;
}
if (!values.equals(that.values)) {
return false;
}
return true;
}
public Class getAnnotationClass() {
return annotationClass;
}
public Object getValue(String name) {
return values.get(name);
}
@Override
public int hashCode() {
return hashCode;
}
@Override
public String toString() {
return "QualifierInstance {" + "annotationClass=" + annotationClass + ", values=" + values + '}';
}
}