/*
* 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.karaf.features.command.completers;
import java.util.ArrayList;
import java.util.List;
import org.apache.karaf.features.Feature;
import org.apache.karaf.features.FeaturesService;
import org.apache.karaf.shell.api.action.lifecycle.Reference;
import org.apache.karaf.shell.api.console.Candidate;
import org.apache.karaf.shell.api.console.CommandLine;
import org.apache.karaf.shell.api.console.Completer;
import org.apache.karaf.shell.api.console.Session;
/**
* Base completer for feature commands.
*/
public abstract class FeatureCompleterSupport implements Completer {
/**
* Feature service.
*/
@Reference
protected FeaturesService featuresService;
public void setFeaturesService(FeaturesService featuresService) {
this.featuresService = featuresService;
}
@Override
public int complete(Session session, final CommandLine commandLine, final List<String> candidates) {
List<Candidate> cands = new ArrayList<>();
completeCandidates(session, commandLine, cands);
for (Candidate cand : cands) {
candidates.add(cand.value());
}
return candidates.isEmpty() ? -1 : 0;
}
@Override
public void completeCandidates(Session session, CommandLine commandLine, List<Candidate> candidates) {
try {
for (Feature feature : featuresService.listFeatures()) {
if (acceptsFeature(feature)) {
add(candidates, feature);
}
}
} catch (Exception e) {
// Ignore
}
}
protected void add(List<Candidate> candidates, Feature feature) {
candidates.add(new Candidate(
feature.getName(), feature.getName(), null,
feature.getDescription(), null, null, true));
}
/**
* Method for filtering features.
*
* @param feature The feature.
* @return True if feature should be available in completer.
*/
protected abstract boolean acceptsFeature(Feature feature);
}