/*
* JBoss, Home of Professional Open Source.
* Copyright 2015, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.cli;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
*
* @author Alexey Loubyansky
*/
public class CommandRegistry {
private final Map<String, CommandHandler> handlers = new HashMap<String, CommandHandler>();
private final Set<String> tabCompletionCommands = new HashSet<String>();
public void registerHandler(CommandHandler handler, String... names) throws CommandLineException {
registerHandler(handler, true, names);
}
public void registerHandler(CommandHandler handler, boolean tabComplete, String... names) throws RegisterHandlerException {
String tabCompleteName = null;
RegisterHandlerException error = null;
for(String name : names) {
if(handlers.containsKey(name)) {
if(error == null) {
error = new RegisterHandlerException(name);
} else {
error.addCommand(name);
}
} else {
if(tabCompleteName == null) {
tabCompleteName = name;
}
handlers.put(name, handler);
}
}
if(tabComplete && tabCompleteName != null) {
tabCompletionCommands.add(tabCompleteName);
}
if(error != null) {
throw error;
}
}
public Set<String> getTabCompletionCommands() {
return tabCompletionCommands;
}
public CommandHandler getCommandHandler(String command) {
return handlers.get(command);
}
public CommandHandler remove(String cmdName) {
if(cmdName == null) {
throw new IllegalArgumentException();
}
CommandHandler handler = handlers.remove(cmdName);
if(handler != null) {
tabCompletionCommands.remove(cmdName);
}
return handler;
}
public static class RegisterHandlerException extends CommandLineException {
private static final long serialVersionUID = 1L;
private List<String> names;
public RegisterHandlerException(String commandName) {
super("");
names = Collections.singletonList(commandName);
}
void addCommand(String name) {
if(names.size() == 1) {
names = new ArrayList<String>(names);
}
names.add(name);
}
public List<String> getNotAddedNames() {
return Collections.unmodifiableList(names);
}
@Override
public String getMessage() {
final StringBuilder buf = new StringBuilder("The following command names could not be registered since they conflict with the already registered ones: ");
buf.append(names.get(0));
for(int i = 1; i < names.size(); ++i) {
buf.append(", ").append(names.get(i));
}
return buf.toString();
}
}
}