/*
* Copyright 2002-2014 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.web.servlet.config.annotation;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.BeanFactoryUtils;
import org.springframework.beans.factory.ListableBeanFactory;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.context.annotation.ConfigurationCondition;
import org.springframework.core.type.AnnotatedTypeMetadata;
import org.springframework.util.ObjectUtils;
/**
* A simple configuration condition that checks for the absence of any beans
* of a given type.
*
* @author Rossen Stoyanchev
* @since 4.1
*/
class BeanTypeNotPresentCondition implements ConfigurationCondition {
private static final Log logger =
LogFactory.getLog("org.springframework.web.servlet.config.annotation.ViewResolution");
private final Class<?> beanType;
BeanTypeNotPresentCondition(Class<?> beanType) {
this.beanType = beanType;
}
@Override
public ConfigurationPhase getConfigurationPhase() {
return ConfigurationPhase.PARSE_CONFIGURATION;
}
public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
ListableBeanFactory factory = context.getBeanFactory();
String[] names = BeanFactoryUtils.beanNamesForTypeIncludingAncestors(factory, this.beanType, false, false);
if (ObjectUtils.isEmpty(names)) {
logger.debug("No bean of type [" + this.beanType + "]. Conditional configuration applies.");
return true;
}
else {
logger.debug("Found bean of type [" + this.beanType + "]. Conditional configuration does not apply.");
return false;
}
}
}