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/*
 * Copyright 2002-2017 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
 *
 *      https://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.
 *
 * 

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 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 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 == ScopedProxyMode.DEFAULT) { proxyMode = this.defaultProxyMode; } metadata.setScopedProxyMode(proxyMode); } } return metadata; } }





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