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/*******************************************************************************
* Copyright (c) 2011, 2017 SAP AG and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Lazar Kirchev, SAP AG - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.console.completion;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.apache.felix.service.command.CommandSession;
import org.eclipse.equinox.console.commands.CommandsTracker;
import org.eclipse.equinox.console.completion.common.Completer;
import org.osgi.framework.BundleContext;
import org.osgi.util.tracker.ServiceTracker;
/**
* This class provides completion for command names.
*
*/
public class CommandNamesCompleter implements Completer {
private CommandSession session;
private ServiceTracker<CommandsTracker, CommandsTracker> commandsTrackerTracker;
private static final String COMMANDS = ".commands";
public CommandNamesCompleter(BundleContext context, CommandSession session) {
this.session = session;
commandsTrackerTracker = new ServiceTracker<>(context, CommandsTracker.class.getName(), null);
commandsTrackerTracker.open();
}
@Override
@SuppressWarnings("unchecked")
public Map<String, Integer> getCandidates(String buffer, int cursor) {
CommandsTracker commandsTracker = commandsTrackerTracker.getService();
Set<String> commandNames = null;
if (commandsTracker != null) {
commandNames = commandsTracker.getCommands();
}
// CommandSession.get(".commands") returns the names of all registered commands
if (commandNames == null || commandNames.isEmpty()) {
commandNames = (Set<String>) session.get(COMMANDS);
}
// command names are stored in the session in lower case
String currentToken = CommandLineParser.getCurrentToken(buffer, cursor).toLowerCase();
if(currentToken == null || currentToken.equals("")) {
return new HashMap<>();
}
if (!currentToken.contains(":")) {
// the current token does not contain a scope qualifier, so remove scopes from possible candidates
commandNames = clearScopes(commandNames);
}
StringsCompleter completer = new StringsCompleter(commandNames, true);
return completer.getCandidates(buffer, cursor);
}
private Set<String> clearScopes(Set<String> commandNames) {
Set<String> clearedCommandNames = new HashSet<>();
for(String commandName : commandNames) {
clearedCommandNames.add(commandName.substring(commandName.indexOf(":") + 1));
}
return clearedCommandNames;
}
}
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