/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.cxf.bus.spring;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;
import org.apache.cxf.Bus;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.configuration.Configurer;
import org.apache.cxf.configuration.spring.AbstractBeanDefinitionParser;
import org.apache.cxf.configuration.spring.BusWiringType;
import org.apache.cxf.configuration.spring.ConfigurerImpl;
import org.apache.cxf.helpers.CastUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.ConstructorArgumentValues;
import org.springframework.beans.factory.config.ConstructorArgumentValues.ValueHolder;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;
/**
* BeanFactoryPostProcessor that looks for any bean definitions that have the
* {@link AbstractBeanDefinitionParser#WIRE_BUS_ATTRIBUTE} attribute set. If the attribute has the value
* {@link BusWiringType#PROPERTY} then it attaches their "bus" property to the bean called "cxf". If the
* attribute has the value {@link BusWiringType#CONSTRUCTOR} then it shifts any existing indexed constructor
* arguments one place to the right and adds a reference to "cxf" as the first constructor argument. This
* processor is intended to operate on beans defined via Spring namespace support which require a reference to
* the CXF bus.
*
* @author Ian Roberts
*/
public class BusWiringBeanFactoryPostProcessor implements BeanFactoryPostProcessor {
private static final Logger LOG = LogUtils.getL7dLogger(BusWiringBeanFactoryPostProcessor.class);
Bus bus;
public BusWiringBeanFactoryPostProcessor() {
}
public BusWiringBeanFactoryPostProcessor(Bus b) {
bus = b;
}
public void postProcessBeanFactory(ConfigurableListableBeanFactory factory) throws BeansException {
Object inject = bus;
if (factory.containsBeanDefinition(Bus.DEFAULT_BUS_ID)) {
inject = new RuntimeBeanReference(Bus.DEFAULT_BUS_ID);
}
for (String beanName : factory.getBeanDefinitionNames()) {
LOG.fine("Checking bean " + beanName);
BeanDefinition beanDefinition = factory.getBeanDefinition(beanName);
if (BusWiringType.PROPERTY == beanDefinition
.getAttribute(AbstractBeanDefinitionParser.WIRE_BUS_ATTRIBUTE)) {
LOG.fine("Found " + AbstractBeanDefinitionParser.WIRE_BUS_ATTRIBUTE + " attribute "
+ BusWiringType.PROPERTY + " on bean " + beanName);
beanDefinition.getPropertyValues()
.addPropertyValue("bus", inject);
} else if (BusWiringType.CONSTRUCTOR == beanDefinition
.getAttribute(AbstractBeanDefinitionParser.WIRE_BUS_ATTRIBUTE)) {
LOG.fine("Found " + AbstractBeanDefinitionParser.WIRE_BUS_ATTRIBUTE + " attribute "
+ BusWiringType.CONSTRUCTOR + " on bean " + beanName);
ConstructorArgumentValues constructorArgs = beanDefinition.getConstructorArgumentValues();
insertConstructorArg(constructorArgs, inject);
}
}
}
/**
* Insert the given value as the first constructor argument in the given set. To do this, we clear the
* argument set, then re-insert all its generic arguments, then re-insert all its indexed arguments with
* their indices incremented by 1, and finally set the first indexed argument (at index 0) to the given
* value.
*
* @param constructorArgs the argument definition to modify.
* @param valueToInsert the value to insert as the first argument.
*/
private void insertConstructorArg(ConstructorArgumentValues constructorArgs, Object valueToInsert) {
List<ValueHolder> genericArgs = new ArrayList<ValueHolder>(CastUtils
.<ValueHolder> cast(constructorArgs.getGenericArgumentValues()));
Map<Integer, ValueHolder> indexedArgs = new HashMap<Integer, ValueHolder>(CastUtils
.<Integer, ValueHolder> cast(constructorArgs.getIndexedArgumentValues()));
constructorArgs.clear();
for (ValueHolder genericValue : genericArgs) {
constructorArgs.addGenericArgumentValue(genericValue);
}
for (Map.Entry<Integer, ValueHolder> entry : indexedArgs.entrySet()) {
constructorArgs.addIndexedArgumentValue(entry.getKey() + 1, entry.getValue());
}
constructorArgs.addIndexedArgumentValue(0, valueToInsert);
}
public static void updateBusReferencesInContext(Bus bus, ApplicationContext ctx) {
Configurer conf = bus.getExtension(Configurer.class);
if (conf instanceof ConfigurerImpl) {
((ConfigurerImpl)conf).addApplicationContext(ctx);
}
if (ctx instanceof ConfigurableApplicationContext) {
ConfigurableApplicationContext cctx = (ConfigurableApplicationContext)ctx;
new BusWiringBeanFactoryPostProcessor(bus).postProcessBeanFactory(cctx.getBeanFactory());
}
}
}