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/**
* 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 org.apache.cxf.Bus;
import org.apache.cxf.configuration.Configurer;
import org.apache.cxf.configuration.NullConfigurer;
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.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.RootBeanDefinition;
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.
*/
public class BusWiringBeanFactoryPostProcessor implements BeanFactoryPostProcessor {
Bus bus;
String busName;
public BusWiringBeanFactoryPostProcessor() {
}
public BusWiringBeanFactoryPostProcessor(Bus b) {
bus = b;
}
public BusWiringBeanFactoryPostProcessor(String n) {
busName = n;
}
private static Bus getBusForName(String name,
ApplicationContext context,
boolean create) {
if (!context.containsBean(name) && (create || Bus.DEFAULT_BUS_ID.equals(name))) {
SpringBus b = new SpringBus();
ConfigurableApplicationContext cctx = (ConfigurableApplicationContext)context;
cctx.getBeanFactory().registerSingleton(name, b);
b.setApplicationContext(context);
}
return (Bus)context.getBean(name, Bus.class);
}
private Object getBusForName(String name,
ConfigurableListableBeanFactory factory,
boolean create,
String cn) {
if (!factory.containsBeanDefinition(name) && (create || Bus.DEFAULT_BUS_ID.equals(name))) {
DefaultListableBeanFactory df = (DefaultListableBeanFactory)factory;
RootBeanDefinition rbd = new RootBeanDefinition(SpringBus.class);
if (cn != null) {
rbd.setAttribute("busConfig", new RuntimeBeanReference(cn));
}
df.registerBeanDefinition(name, rbd);
} else if (cn != null) {
BeanDefinition bd = factory.getBeanDefinition(name);
bd.getPropertyValues().addPropertyValue("busConfig", new RuntimeBeanReference(cn));
}
return new RuntimeBeanReference(name);
}
public void postProcessBeanFactory(ConfigurableListableBeanFactory factory) throws BeansException {
Object inject = bus;
if (inject == null) {
inject = getBusForName(Bus.DEFAULT_BUS_ID, factory, true, null);
} else {
if (!factory.containsBeanDefinition(Bus.DEFAULT_BUS_ID)
&& !factory.containsSingleton(Bus.DEFAULT_BUS_ID)) {
factory.registerSingleton(Bus.DEFAULT_BUS_ID, bus);
}
}
for (String beanName : factory.getBeanDefinitionNames()) {
BeanDefinition beanDefinition = factory.getBeanDefinition(beanName);
BusWiringType type
= (BusWiringType)beanDefinition.getAttribute(AbstractBeanDefinitionParser.WIRE_BUS_ATTRIBUTE);
if (type == null) {
continue;
}
String busname = (String)beanDefinition.getAttribute(AbstractBeanDefinitionParser.WIRE_BUS_NAME);
String create = (String)beanDefinition
.getAttribute(AbstractBeanDefinitionParser.WIRE_BUS_CREATE);
Object inj = inject;
if (busname != null) {
if (bus != null) {
continue;
}
inj = getBusForName(busname, factory, create != null, create);
}
beanDefinition.removeAttribute(AbstractBeanDefinitionParser.WIRE_BUS_NAME);
beanDefinition.removeAttribute(AbstractBeanDefinitionParser.WIRE_BUS_ATTRIBUTE);
beanDefinition.removeAttribute(AbstractBeanDefinitionParser.WIRE_BUS_CREATE);
if (create == null) {
if (BusWiringType.PROPERTY == type) {
beanDefinition.getPropertyValues()
.addPropertyValue("bus", inj);
} else if (BusWiringType.CONSTRUCTOR == type) {
ConstructorArgumentValues constructorArgs = beanDefinition.getConstructorArgumentValues();
insertConstructorArg(constructorArgs, inj);
}
}
}
}
/**
* 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 genericArgs = new ArrayList(CastUtils
. cast(constructorArgs.getGenericArgumentValues()));
Map indexedArgs = new HashMap(CastUtils
. cast(constructorArgs.getIndexedArgumentValues()));
constructorArgs.clear();
for (ValueHolder genericValue : genericArgs) {
constructorArgs.addGenericArgumentValue(genericValue);
}
for (Map.Entry entry : indexedArgs.entrySet()) {
constructorArgs.addIndexedArgumentValue(entry.getKey() + 1, entry.getValue());
}
constructorArgs.addIndexedArgumentValue(0, valueToInsert);
}
/**
* This is deprecated and is there to support 2.3.x compatibility.
* Code should be updated to call addDefaultBus(ctx) instead to get the bus
* associated with the context.
* @param bus
* @param ctx
*/
@Deprecated
public static void updateBusReferencesInContext(Bus bus, ApplicationContext ctx) {
Configurer conf = bus.getExtension(Configurer.class);
if (conf instanceof NullConfigurer) {
bus.setExtension(new ConfigurerImpl(ctx), Configurer.class);
} else if (conf instanceof ConfigurerImpl) {
((ConfigurerImpl)conf).addApplicationContext(ctx);
}
if (ctx instanceof ConfigurableApplicationContext) {
ConfigurableApplicationContext cctx = (ConfigurableApplicationContext)ctx;
new BusWiringBeanFactoryPostProcessor(bus).postProcessBeanFactory(cctx.getBeanFactory());
}
}
public static Bus addDefaultBus(ApplicationContext ctx) {
if (!ctx.containsBean(Bus.DEFAULT_BUS_ID)) {
Bus b = getBusForName(Bus.DEFAULT_BUS_ID, ctx, true);
if (ctx instanceof ConfigurableApplicationContext) {
ConfigurableApplicationContext cctx = (ConfigurableApplicationContext)ctx;
new BusWiringBeanFactoryPostProcessor(b).postProcessBeanFactory(cctx.getBeanFactory());
}
}
return Bus.class.cast(ctx.getBean(Bus.DEFAULT_BUS_ID, Bus.class));
}
public static Bus addBus(ApplicationContext ctx, String name) {
return getBusForName(name, ctx, true);
}
}