org.springframework.boot.autoconfigure.AutoConfigurationPackages Maven / Gradle / Ivy
/*
* Copyright 2012-2018 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.boot.autoconfigure;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.ConstructorArgumentValues;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.GenericBeanDefinition;
import org.springframework.boot.context.annotation.DeterminableImports;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;
/**
* Class for storing auto-configuration packages for reference later (e.g. by JPA entity
* scanner).
*
* @author Phillip Webb
* @author Dave Syer
* @author Oliver Gierke
*/
public abstract class AutoConfigurationPackages {
private static final Log logger = LogFactory.getLog(AutoConfigurationPackages.class);
private static final String BEAN = AutoConfigurationPackages.class.getName();
/**
* Determine if the auto-configuration base packages for the given bean factory are
* available.
* @param beanFactory the source bean factory
* @return true if there are auto-config packages available
*/
public static boolean has(BeanFactory beanFactory) {
return beanFactory.containsBean(BEAN) && !get(beanFactory).isEmpty();
}
/**
* Return the auto-configuration base packages for the given bean factory.
* @param beanFactory the source bean factory
* @return a list of auto-configuration packages
* @throws IllegalStateException if auto-configuration is not enabled
*/
public static List get(BeanFactory beanFactory) {
try {
return beanFactory.getBean(BEAN, BasePackages.class).get();
}
catch (NoSuchBeanDefinitionException ex) {
throw new IllegalStateException(
"Unable to retrieve @EnableAutoConfiguration base packages");
}
}
/**
* Programmatically registers the auto-configuration package names. Subsequent
* invocations will add the given package names to those that have already been
* registered. You can use this method to manually define the base packages that will
* be used for a given {@link BeanDefinitionRegistry}. Generally it's recommended that
* you don't call this method directly, but instead rely on the default convention
* where the package name is set from your {@code @EnableAutoConfiguration}
* configuration class or classes.
* @param registry the bean definition registry
* @param packageNames the package names to set
*/
public static void register(BeanDefinitionRegistry registry, String... packageNames) {
if (registry.containsBeanDefinition(BEAN)) {
BeanDefinition beanDefinition = registry.getBeanDefinition(BEAN);
ConstructorArgumentValues constructorArguments = beanDefinition
.getConstructorArgumentValues();
constructorArguments.addIndexedArgumentValue(0,
addBasePackages(constructorArguments, packageNames));
}
else {
GenericBeanDefinition beanDefinition = new GenericBeanDefinition();
beanDefinition.setBeanClass(BasePackages.class);
beanDefinition.getConstructorArgumentValues().addIndexedArgumentValue(0,
packageNames);
beanDefinition.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
registry.registerBeanDefinition(BEAN, beanDefinition);
}
}
private static String[] addBasePackages(
ConstructorArgumentValues constructorArguments, String[] packageNames) {
String[] existing = (String[]) constructorArguments
.getIndexedArgumentValue(0, String[].class).getValue();
Set merged = new LinkedHashSet();
merged.addAll(Arrays.asList(existing));
merged.addAll(Arrays.asList(packageNames));
return merged.toArray(new String[merged.size()]);
}
/**
* {@link ImportBeanDefinitionRegistrar} to store the base package from the importing
* configuration.
*/
@Order(Ordered.HIGHEST_PRECEDENCE)
static class Registrar implements ImportBeanDefinitionRegistrar, DeterminableImports {
@Override
public void registerBeanDefinitions(AnnotationMetadata metadata,
BeanDefinitionRegistry registry) {
register(registry, new PackageImport(metadata).getPackageName());
}
@Override
public Set