/*
* Copyright 2013 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.data.hadoop.config.common.annotation;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.BeanClassLoaderAware;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ImportAware;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.util.ClassUtils;
/**
* Base implementation of @{@Configuration} class.
*
* @author Janne Valkealahti
*
* @param <O> The object that used builder returns
* @param <B> The type of the builder
*/
public abstract class AbstractAnnotationConfiguration<B extends AnnotationBuilder<O>, O>
implements ImportAware, BeanClassLoaderAware {
private List<AnnotationConfigurer<O,B>> configurers;
private ClassLoader beanClassLoader;
private AnnotationAttributes annotationAttributes;
@Override
public void setBeanClassLoader(ClassLoader classLoader) {
beanClassLoader = classLoader;
}
@Override
public void setImportMetadata(AnnotationMetadata importMetadata) {
Map<String, Object> enableConfigurationAttrMap =
importMetadata.getAnnotationAttributes(EnableAnnotationConfiguration.class.getName());
AnnotationAttributes enableConfigurationAttrs = AnnotationAttributes.fromMap(enableConfigurationAttrMap);
if(enableConfigurationAttrs == null) {
// search parent classes
Class<?> currentClass = ClassUtils.resolveClassName(importMetadata.getClassName(), beanClassLoader);
for(Class<?> classToInspect = currentClass ;classToInspect != null; classToInspect = classToInspect.getSuperclass()) {
EnableAnnotationConfiguration enableConfigurationAnnotation =
AnnotationUtils.findAnnotation(classToInspect, EnableAnnotationConfiguration.class);
if(enableConfigurationAnnotation == null) {
continue;
}
enableConfigurationAttrMap = AnnotationUtils
.getAnnotationAttributes(enableConfigurationAnnotation);
enableConfigurationAttrs = AnnotationAttributes.fromMap(enableConfigurationAttrMap);
}
}
annotationAttributes = enableConfigurationAttrs;
}
/**
* Sets the configurers.
*
* @param configurers the configurers
* @throws Exception the exception
*/
@Autowired(required=false)
public void setConfigurers(List<AnnotationConfigurer<O, B>> configurers) throws Exception {
this.configurers = configurers;
onConfigurers(configurers);
}
public AnnotationAttributes getAnnotationAttributes() {
return annotationAttributes;
}
public List<AnnotationConfigurer<O, B>> getConfigurers() {
return configurers;
}
protected abstract void onConfigurers(List<AnnotationConfigurer<O, B>> configurers) throws Exception;
}