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/*
* Copyright 2002-2016 the original author or authors.
*
* 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.springframework.context.annotation;
import java.lang.annotation.Annotation;
import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.util.Assert;
/**
* A {@link ScopeMetadataResolver} implementation that by default checks for
* the presence of Spring's {@link Scope @Scope} annotation on the bean class.
*
* <p>The exact type of annotation that is checked for is configurable via
* {@link #setScopeAnnotationType(Class)}.
*
* @author Mark Fisher
* @author Juergen Hoeller
* @author Sam Brannen
* @since 2.5
* @see org.springframework.context.annotation.Scope
*/
public class AnnotationScopeMetadataResolver implements ScopeMetadataResolver {
private final ScopedProxyMode defaultProxyMode;
protected Class<? extends Annotation> scopeAnnotationType = Scope.class;
/**
* Construct a new {@code AnnotationScopeMetadataResolver}.
* @see #AnnotationScopeMetadataResolver(ScopedProxyMode)
* @see ScopedProxyMode#NO
*/
public AnnotationScopeMetadataResolver() {
this.defaultProxyMode = ScopedProxyMode.NO;
}
/**
* Construct a new {@code AnnotationScopeMetadataResolver} using the
* supplied default {@link ScopedProxyMode}.
* @param defaultProxyMode the default scoped-proxy mode
*/
public AnnotationScopeMetadataResolver(ScopedProxyMode defaultProxyMode) {
Assert.notNull(defaultProxyMode, "'defaultProxyMode' must not be null");
this.defaultProxyMode = defaultProxyMode;
}
/**
* Set the type of annotation that is checked for by this
* {@code AnnotationScopeMetadataResolver}.
* @param scopeAnnotationType the target annotation type
*/
public void setScopeAnnotationType(Class<? extends Annotation> scopeAnnotationType) {
Assert.notNull(scopeAnnotationType, "'scopeAnnotationType' must not be null");
this.scopeAnnotationType = scopeAnnotationType;
}
@Override
public ScopeMetadata resolveScopeMetadata(BeanDefinition definition) {
ScopeMetadata metadata = new ScopeMetadata();
if (definition instanceof AnnotatedBeanDefinition) {
AnnotatedBeanDefinition annDef = (AnnotatedBeanDefinition) definition;
AnnotationAttributes attributes = AnnotationConfigUtils.attributesFor(
annDef.getMetadata(), this.scopeAnnotationType);
if (attributes != null) {
metadata.setScopeName(attributes.getString("value"));
ScopedProxyMode proxyMode = attributes.getEnum("proxyMode");
if (proxyMode == null || proxyMode == ScopedProxyMode.DEFAULT) {
proxyMode = this.defaultProxyMode;
}
metadata.setScopedProxyMode(proxyMode);
}
}
return metadata;
}
}
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