/*
* 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.config.command.completers;
import java.io.IOException;
import java.util.Arrays;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.karaf.config.command.ConfigCommandSupport;
import org.apache.karaf.shell.api.action.lifecycle.Reference;
import org.apache.karaf.shell.api.action.lifecycle.Service;
import org.apache.karaf.shell.api.console.CommandLine;
import org.apache.karaf.shell.api.console.Completer;
import org.apache.karaf.shell.api.console.Session;
import org.apache.karaf.shell.support.completers.StringsCompleter;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.service.cm.Configuration;
import org.osgi.service.cm.ConfigurationAdmin;
/**
* {@link Completer} for Configuration Admin properties.
*
* Displays a list of existing properties based on the current configuration being edited.
*
*/
@Service
public class ConfigurationPropertyCompleter implements Completer {
private static final String OPTION = "-p";
private static final String ALIAS = "--pid";
@Reference
private ConfigurationAdmin configAdmin;
public int complete(final Session session, final CommandLine commandLine, final List<String> candidates) {
StringsCompleter strings = new StringsCompleter();
if (session != null) {
String pid = getPid(session, commandLine);
Set<String> propertyNames = getPropertyNames(pid);
if (propertyNames != null && !propertyNames.isEmpty()) {
strings.getStrings().addAll(propertyNames);
}
}
return strings.complete(session, commandLine, candidates);
}
/**
* Retrieves the pid stored in the {@link Session} or passed as an argument.
* Argument takes precedence from pid stored in the {@link Session}.
*/
private String getPid(Session session, CommandLine commandLine) {
String pid = (String) session.get(ConfigCommandSupport.PROPERTY_CONFIG_PID);
if (commandLine.getArguments().length > 0) {
List<String> arguments = Arrays.asList(commandLine.getArguments());
if (arguments.contains(OPTION)) {
int index = arguments.indexOf(OPTION);
if (arguments.size() > index) {
return arguments.get(index + 1);
}
}
if (arguments.contains(ALIAS)) {
int index = arguments.indexOf(ALIAS);
if (arguments.size() > index) {
return arguments.get(index + 1);
}
}
}
return pid;
}
/**
* Returns the property names for the given pid.
* @param pid
* @return
*/
@SuppressWarnings("rawtypes")
private Set<String> getPropertyNames(String pid) {
Set<String> propertyNames = new HashSet<String>();
if (pid != null) {
Configuration configuration = null;
try {
Configuration[] configs = configAdmin.listConfigurations("(service.pid="+pid+")");
if (configs != null && configs.length > 0) {
configuration = configs[0];
if (configuration != null) {
Dictionary properties = configuration.getProperties();
if (properties != null) {
Enumeration keys = properties.keys();
while (keys.hasMoreElements()) {
propertyNames.add(String.valueOf(keys.nextElement()));
}
}
}
}
} catch (IOException e) {
//Ignore
} catch (InvalidSyntaxException e) {
//Ignore
}
}
return propertyNames;
}
public ConfigurationAdmin getConfigAdmin() {
return configAdmin;
}
public void setConfigAdmin(ConfigurationAdmin configAdmin) {
this.configAdmin = configAdmin;
}
}