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/*
* ================================================================================
* Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*
*/
package org.onap.dcae.utils.eelf.logger.logback.resolver;
import java.util.List;
import java.util.Map;
import java.util.Properties;
/**
* Resolve System Properties passed in by -DpropertyName=propertyValue when invoking
* via java command line arguments
*
* @author Rajiv Singla
*/
public class SystemPropertyResolver implements PropertyResolver {
private static final long serialVersionUID = 1L;
@Override
public String resolve(final List<String> propertyNames) {
// Get all system Properties
final Properties systemProperties = System.getProperties();
for (Map.Entry<Object, Object> systemEntries : systemProperties.entrySet()) {
if (systemEntries.getKey() instanceof String) {
final String systemKey = (String) systemEntries.getKey();
// if system properties contain any of the property names - ignoring case then return its value
for (String propertyName : propertyNames) {
if (propertyName.equalsIgnoreCase(systemKey)) {
return (String) systemEntries.getValue();
}
}
}
}
return null;
}
}
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