org.springframework.boot.autoconfigure.ImportAutoConfigurationImportSelector Maven / Gradle / Ivy
/*
* Copyright 2012-2016 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.boot.autoconfigure;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.io.support.SpringFactoriesLoader;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.util.ClassUtils;
/**
* Variant of {@link EnableAutoConfigurationImportSelector} for
* {@link ImportAutoConfiguration}.
*
* @author Phillip Webb
* @author Andy Wilkinson
*/
class ImportAutoConfigurationImportSelector
extends EnableAutoConfigurationImportSelector {
private static final Set ANNOTATION_NAMES;
static {
Set names = new LinkedHashSet();
names.add(ImportAutoConfiguration.class.getName());
names.add("org.springframework.boot.autoconfigure.test.ImportAutoConfiguration");
ANNOTATION_NAMES = Collections.unmodifiableSet(names);
}
@Override
protected AnnotationAttributes getAttributes(AnnotationMetadata metadata) {
return null;
}
@Override
protected List getCandidateConfigurations(AnnotationMetadata metadata,
AnnotationAttributes attributes) {
try {
return getCandidateConfigurations(
ClassUtils.forName(metadata.getClassName(), null));
}
catch (Exception ex) {
throw new IllegalStateException(ex);
}
}
private List getCandidateConfigurations(Class source) {
Set candidates = new LinkedHashSet();
collectCandidateConfigurations(source, candidates, new HashSet>());
return new ArrayList(candidates);
}
private void collectCandidateConfigurations(Class source, Set candidates,
Set> seen) {
if (source != null && seen.add(source)) {
for (Annotation annotation : source.getDeclaredAnnotations()) {
if (!AnnotationUtils.isInJavaLangAnnotationPackage(annotation)) {
collectCandidateConfigurations(source, annotation, candidates, seen);
}
}
collectCandidateConfigurations(source.getSuperclass(), candidates, seen);
}
}
private void collectCandidateConfigurations(Class source, Annotation annotation,
Set candidates, Set> seen) {
if (ANNOTATION_NAMES.contains(annotation.annotationType().getName())) {
candidates.addAll(getConfigurationsForAnnotation(source, annotation));
}
collectCandidateConfigurations(annotation.annotationType(), candidates, seen);
}
private Collection getConfigurationsForAnnotation(Class source,
Annotation annotation) {
String[] value = (String[]) AnnotationUtils
.getAnnotationAttributes(annotation, true).get("value");
if (value.length > 0) {
return Arrays.asList(value);
}
return SpringFactoriesLoader.loadFactoryNames(source,
getClass().getClassLoader());
}
@Override
protected Set getExclusions(AnnotationMetadata metadata,
AnnotationAttributes attributes) {
return Collections.emptySet();
}
@Override
public int getOrder() {
return super.getOrder() - 1;
}
}