/*
* 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.tinkerpop.gremlin.util;
import org.apache.commons.configuration.BaseConfiguration;
import org.apache.commons.configuration.Configuration;
import java.util.Map;
/**
* @author Marko A. Rodriguez (http://markorodriguez.com)
*/
public final class SystemUtil {
private SystemUtil() {
}
/**
* Generate a {@link Configuration} from the {@link System#getProperties}.
* Only those properties with specified prefix key are aggregated.
* If the prefix and a . should be removed, then trim prefix.
*
* @param prefix the prefix of the keys to include in the configuration
* @param trimPrefix whether to trim the prefix + . from the key
* @return a configuration generated from the System properties
*/
public static Configuration getSystemPropertiesConfiguration(final String prefix, final boolean trimPrefix) {
final BaseConfiguration apacheConfiguration = new BaseConfiguration();
apacheConfiguration.setDelimiterParsingDisabled(true);
for (final Map.Entry<Object, Object> entry : System.getProperties().entrySet()) {
final String key = entry.getKey().toString();
final Object value = entry.getValue();
if (key.startsWith(prefix + "."))
apacheConfiguration.setProperty(trimPrefix ? key.substring(prefix.length() + 1) : key, value);
}
return apacheConfiguration;
}
}