/*
* 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.myfaces.extensions.cdi.core.impl.logging;
import org.apache.myfaces.extensions.cdi.core.api.logging.LoggerDetails;
import org.apache.myfaces.extensions.cdi.core.api.logging.Logger;
import javax.enterprise.context.Dependent;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.InjectionPoint;
import java.lang.reflect.Field;
/**
* Producer for injectable loggers and logger factories
*/
@ApplicationScoped
public class LoggerProducer
{
@Produces
@Dependent
public Logger getLogger(InjectionPoint injectionPoint)
{
Bean<?> bean = injectionPoint.getBean();
String name = null;
if(bean != null)
{
name = bean.getBeanClass().getName();
}
//workaround for weld - only in some constellations
else if(injectionPoint.getClass().getName().contains(".weld."))
{
name = tryToExtractName(injectionPoint);
}
if(name == null)
{
throw new IllegalStateException("InjectionPoint#getBean returns null");
}
return new DefaultLogger(name);
}
//workaround for weld
private String tryToExtractName(InjectionPoint injectionPoint)
{
try
{
Object field1 = tryToGetFieldValue(injectionPoint, "field", Object.class);
Field field2 = tryToGetFieldValue(field1, "field", Field.class);
return field2.getDeclaringClass().getName();
}
catch (Exception e)
{
return null;
}
}
@Produces
@Dependent
public Logger.Factory getLoggerFactory(InjectionPoint injectionPoint)
{
return new DefaultLogger(injectionPoint.getBean().getBeanClass().getName()).getFactory();
}
@Produces
@Dependent
@LoggerDetails
public Logger getLoggerForDetails(InjectionPoint injectionPoint)
{
LoggerDetails loggerDetails = injectionPoint.getAnnotated().getAnnotation(LoggerDetails.class);
DefaultLogger logger = new DefaultLogger(loggerDetails.name(),
loggerDetails.resourceBundleName(),
loggerDetails.anonymous());
if(!logger.isValid())
{
java.util.logging.Logger.getLogger(LoggerProducer.class.getName())
.warning("an injection point in " + injectionPoint.getBean().getBeanClass().getName() +
" uses an empty qualifier of type " + LoggerDetails.class.getName() +
" - please remove it!");
}
return logger;
}
//TODO
public <T> T tryToGetFieldValue(Object object, String fieldName, Class<T> resultType)
{
Class currentClass = object.getClass();
while (currentClass != null && !Object.class.getName().equals(currentClass.getName()))
{
for(Field currentField : currentClass.getDeclaredFields())
{
if(currentField.getName().equals(fieldName))
{
boolean accessibleState = currentField.isAccessible();
try
{
currentField.setAccessible(true);
return (T)currentField.get(object);
}
catch (IllegalAccessException e)
{
return null;
}
finally
{
currentField.setAccessible(accessibleState);
}
}
}
currentClass = currentClass.getSuperclass();
}
return null;
}
}