com.netflix.config.ConfigurationBackedDynamicPropertySupportImpl Maven / Gradle / Ivy
/**
* Copyright 2014 Netflix, Inc.
*
* 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.
*/
package com.netflix.config;
import org.apache.commons.configuration.AbstractConfiguration;
public class ConfigurationBackedDynamicPropertySupportImpl implements DynamicPropertySupport {
private final AbstractConfiguration config;
public ConfigurationBackedDynamicPropertySupportImpl(AbstractConfiguration config) {
if (config == null) {
throw new NullPointerException("config is null");
}
this.config = config;
}
@Override
public String getString(String key) {
try {
String values[] = config.getStringArray(key);
if (values == null) {
return null;
}
if (values.length == 0) {
return config.getString(key);
} else if (values.length == 1) {
return values[0];
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < values.length; i++) {
sb.append(values[i]);
if (i != values.length - 1) {
sb.append(",");
}
}
return sb.toString();
} catch (Exception e) {
Object v = config.getProperty(key);
if (v != null) {
return String.valueOf(v);
} else {
return null;
}
}
}
@Override
public void addConfigurationListener(PropertyListener expandedConfigListener) {
ExpandedConfigurationListenerAdapter nl = new ExpandedConfigurationListenerAdapter(expandedConfigListener);
config.addConfigurationListener(nl);
}
public final AbstractConfiguration getConfiguration() {
return config;
}
}