/*
* Copyright 2002-2010 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.beans.factory.support;
import org.springframework.beans.factory.BeanDefinitionStoreException;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
/**
* Simple interface for bean definition readers.
* Specifies load methods with Resource parameters.
*
* <p>Concrete bean definition readers can of course add additional
* load and register methods for bean definitions, specific to
* their bean definition format.
*
* <p>Note that a bean definition reader does not have to implement
* this interface. It only serves as suggestion for bean definition
* readers that want to follow standard naming conventions.
*
* @author Juergen Hoeller
* @since 1.1
* @see org.springframework.core.io.Resource
*/
public interface BeanDefinitionReader {
/**
* Return the bean factory to register the bean definitions with.
* <p>The factory is exposed through the BeanDefinitionRegistry interface,
* encapsulating the methods that are relevant for bean definition handling.
*/
BeanDefinitionRegistry getRegistry();
/**
* Return the resource loader to use for resource locations.
* Can be checked for the <b>ResourcePatternResolver</b> interface and cast
* accordingly, for loading multiple resources for a given resource pattern.
* <p>Null suggests that absolute resource loading is not available
* for this bean definition reader.
* <p>This is mainly meant to be used for importing further resources
* from within a bean definition resource, for example via the "import"
* tag in XML bean definitions. It is recommended, however, to apply
* such imports relative to the defining resource; only explicit full
* resource locations will trigger absolute resource loading.
* <p>There is also a <code>loadBeanDefinitions(String)</code> method available,
* for loading bean definitions from a resource location (or location pattern).
* This is a convenience to avoid explicit ResourceLoader handling.
* @see #loadBeanDefinitions(String)
* @see org.springframework.core.io.support.ResourcePatternResolver
*/
ResourceLoader getResourceLoader();
/**
* Return the class loader to use for bean classes.
* <p><code>null</code> suggests to not load bean classes eagerly
* but rather to just register bean definitions with class names,
* with the corresponding Classes to be resolved later (or never).
*/
ClassLoader getBeanClassLoader();
/**
* Return the BeanNameGenerator to use for anonymous beans
* (without explicit bean name specified).
*/
BeanNameGenerator getBeanNameGenerator();
/**
* Load bean definitions from the specified resource.
* @param resource the resource descriptor
* @return the number of bean definitions found
* @throws BeanDefinitionStoreException in case of loading or parsing errors
*/
int loadBeanDefinitions(Resource resource) throws BeanDefinitionStoreException;
/**
* Load bean definitions from the specified resources.
* @param resources the resource descriptors
* @return the number of bean definitions found
* @throws BeanDefinitionStoreException in case of loading or parsing errors
*/
int loadBeanDefinitions(Resource... resources) throws BeanDefinitionStoreException;
/**
* Load bean definitions from the specified resource location.
* <p>The location can also be a location pattern, provided that the
* ResourceLoader of this bean definition reader is a ResourcePatternResolver.
* @param location the resource location, to be loaded with the ResourceLoader
* (or ResourcePatternResolver) of this bean definition reader
* @return the number of bean definitions found
* @throws BeanDefinitionStoreException in case of loading or parsing errors
* @see #getResourceLoader()
* @see #loadBeanDefinitions(org.springframework.core.io.Resource)
* @see #loadBeanDefinitions(org.springframework.core.io.Resource[])
*/
int loadBeanDefinitions(String location) throws BeanDefinitionStoreException;
/**
* Load bean definitions from the specified resource locations.
* @param locations the resource locations, to be loaded with the ResourceLoader
* (or ResourcePatternResolver) of this bean definition reader
* @return the number of bean definitions found
* @throws BeanDefinitionStoreException in case of loading or parsing errors
*/
int loadBeanDefinitions(String... locations) throws BeanDefinitionStoreException;
}
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