/*
* Copyright © 2015-2016 Cask Data, 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 co.cask.cdap.api.plugin;
import co.cask.cdap.api.annotation.Beta;
import co.cask.cdap.api.artifact.ArtifactId;
import java.util.Map;
import java.util.SortedMap;
/**
* Represents a class for selecting a plugin.
*/
@Beta
public class PluginSelector {
/**
* Selects a plugin. The default implementation returns the last entry in the given map.
*
* @param plugins the set of available plugins. The {@link ArtifactId} is sorted in ascending order of plugin JAR
* name followed by the plugin version.
* @return a {@link java.util.Map.Entry} for the selected plugin
*/
public Map.Entry<ArtifactId, PluginClass> select(SortedMap<ArtifactId, PluginClass> plugins) {
return plugins.tailMap(plugins.lastKey()).entrySet().iterator().next();
}
}