/* Copyright 2008 Edward Yakop.
*
* 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.qi4j.library.spring.bootstrap.internal.application;
import org.qi4j.library.spring.bootstrap.Qi4jApplicationBootstrap;
import org.springframework.beans.BeanInstantiationException;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.beans.factory.xml.XmlReaderContext;
import org.w3c.dom.Element;
import static org.qi4j.library.spring.bootstrap.Constants.BEAN_ID_QI4J_APPLICATION;
import static org.springframework.beans.BeanUtils.instantiateClass;
import static org.springframework.beans.factory.support.BeanDefinitionBuilder.rootBeanDefinition;
import static org.springframework.util.Assert.hasText;
import static org.springframework.util.ClassUtils.forName;
public final class Qi4jBootstrapBeanDefinitionParser
implements BeanDefinitionParser
{
private static final String CLASS = "class";
@Override
public final BeanDefinition parse( Element anElement, ParserContext aParserContext )
{
Qi4jApplicationBootstrap bootstrap = createQi4jApplicationBootstrap( anElement, aParserContext );
AbstractBeanDefinition factoryBeanDefinition = createQi4jApplicationFactoryBeanDefinition( bootstrap );
registerBean( aParserContext, factoryBeanDefinition );
return factoryBeanDefinition;
}
private Qi4jApplicationBootstrap createQi4jApplicationBootstrap( Element anElement, ParserContext aParserContext )
{
String bootstrapClassString = anElement.getAttribute( CLASS );
hasText( bootstrapClassString );
XmlReaderContext readerContext = aParserContext.getReaderContext();
Class<?> bootstrapClass;
try
{
bootstrapClass = forName( bootstrapClassString );
} catch ( ClassNotFoundException e )
{
readerContext.error( "Qi4j bootstrap class [" + bootstrapClassString + "] is not found.", anElement );
return null;
}
if ( !Qi4jApplicationBootstrap.class.isAssignableFrom( bootstrapClass ) )
{
readerContext.error( CLASS + "attribute is not an instance of [" + Qi4jApplicationBootstrap.class.getName()
+ "] class", anElement );
return null;
}
Qi4jApplicationBootstrap bootstrap = null;
try
{
bootstrap = (Qi4jApplicationBootstrap) instantiateClass( bootstrapClass );
} catch ( BeanInstantiationException e )
{
readerContext.error( "Fail to instantiate qi4j bootstrap class [" + bootstrapClassString + "]", anElement,
e );
}
return bootstrap;
}
private AbstractBeanDefinition createQi4jApplicationFactoryBeanDefinition(
final Qi4jApplicationBootstrap applicationBootstrap )
{
BeanDefinitionBuilder builder = rootBeanDefinition( Qi4jApplicationFactoryBean.class );
builder.addConstructorArgValue( applicationBootstrap );
return builder.getBeanDefinition();
}
private void registerBean( ParserContext aParserContext, BeanDefinition aBeanDefinition )
{
BeanDefinitionRegistry registry = aParserContext.getRegistry();
registry.registerBeanDefinition( BEAN_ID_QI4J_APPLICATION, aBeanDefinition );
}
}