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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.qpid.server.configuration;
import java.io.File;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.commons.configuration.CompositeConfiguration;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.ConfigurationFactory;
import org.apache.commons.configuration.SystemConfiguration;
import org.apache.commons.configuration.XMLConfiguration;
public class XmlConfigurationUtilities
{
// Our configuration class needs to make the interpolate method
// public so it can be called below from the config method.
public static class MyConfiguration extends CompositeConfiguration
{
public String interpolate(String obj)
{
return super.interpolate(obj);
}
}
public static Configuration parseConfig(File file, Map<String, String> envVarMap) throws ConfigurationException
{
ConfigurationFactory factory = new ConfigurationFactory();
factory.setConfigurationFileName(file.getAbsolutePath());
Configuration conf = factory.getConfiguration();
Iterator<?> keys = conf.getKeys();
if (!keys.hasNext())
{
keys = null;
conf = flatConfig(file);
}
XmlConfigurationUtilities.substituteEnvironmentVariables(conf, envVarMap);
return conf;
}
public final static Configuration flatConfig(File file) throws ConfigurationException
{
// We have to override the interpolate methods so that
// interpolation takes place across the entirety of the
// composite configuration. Without doing this each
// configuration object only interpolates variables defined
// inside itself.
final MyConfiguration conf = new MyConfiguration();
conf.addConfiguration(new SystemConfiguration()
{
protected String interpolate(String o)
{
return conf.interpolate(o);
}
});
conf.addConfiguration(new XMLConfiguration(file)
{
protected String interpolate(String o)
{
return conf.interpolate(o);
}
});
return conf;
}
static void substituteEnvironmentVariables(Configuration conf, Map<String, String> envVarMap)
{
if (envVarMap == null || envVarMap.isEmpty())
{
return;
}
for (Entry<String, String> var : envVarMap.entrySet())
{
String val = System.getenv(var.getKey());
if (val != null)
{
conf.setProperty(var.getValue(), val);
}
}
}
public static String escapeTagName(String name)
{
return name.replaceAll("\\.", "\\.\\.");
}
}
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