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package org.apache.maven.cli.logging;
/*
* 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.
*/
import java.io.IOException;
import java.net.URL;
import java.util.Enumeration;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import org.apache.maven.cli.logging.impl.UnsupportedSlf4jBindingConfiguration;
import org.codehaus.plexus.util.PropertyUtils;
import org.slf4j.ILoggerFactory;
/**
* Slf4jConfiguration factory, loading implementations from <code>META-INF/maven/slf4j-configuration.properties</code>
* configuration files in class loader: key is the class name of the ILoggerFactory, value is the class name of
* the corresponding Slf4jConfiguration.
*
* @author Hervé Boutemy
* @since 3.1.0
*/
public class Slf4jConfigurationFactory
{
public static final String RESOURCE = "META-INF/maven/slf4j-configuration.properties";
public static Slf4jConfiguration getConfiguration( ILoggerFactory loggerFactory )
{
Map<URL, Set<Object>> supported = new LinkedHashMap<URL, Set<Object>>();
String slf4jBinding = loggerFactory.getClass().getCanonicalName();
try
{
Enumeration<URL> resources = Slf4jConfigurationFactory.class.getClassLoader().getResources( RESOURCE );
while ( resources.hasMoreElements() )
{
URL resource = resources.nextElement();
Properties conf = PropertyUtils.loadProperties( resource.openStream() );
String impl = conf.getProperty( slf4jBinding );
if ( impl != null )
{
return (Slf4jConfiguration) Class.forName( impl ).newInstance();
}
supported.put( resource, conf.keySet() );
}
}
catch ( IOException e )
{
e.printStackTrace();
}
catch ( InstantiationException e )
{
e.printStackTrace();
}
catch ( IllegalAccessException e )
{
e.printStackTrace();
}
catch ( ClassNotFoundException e )
{
e.printStackTrace();
}
return new UnsupportedSlf4jBindingConfiguration( slf4jBinding, supported );
}
}
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