org.jboss.as.cli.impl.DefaultCompleter Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, 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.impl;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.jboss.as.cli.CommandContext;
import org.jboss.as.cli.CommandLineCompleter;
/**
*
* @author Alexey Loubyansky
*/
public class DefaultCompleter implements CommandLineCompleter {
public interface CandidatesProvider {
Collection getAllCandidates(CommandContext ctx);
}
private final CandidatesProvider candidatesProvider;
public DefaultCompleter(CandidatesProvider candidatesProvider) {
if(candidatesProvider == null) {
throw new IllegalArgumentException("candidatesProvider can't be null.");
}
this.candidatesProvider = candidatesProvider;
}
/* (non-Javadoc)
* @see org.jboss.as.cli.CommandLineCompleter#complete(org.jboss.as.cli.CommandContext, java.lang.String, int, java.util.List)
*/
@Override
public int complete(CommandContext ctx, String buffer, int cursor, List candidates) {
int nextCharIndex = 0;
while (nextCharIndex < buffer.length()) {
if (!Character.isWhitespace(buffer.charAt(nextCharIndex))) {
break;
}
++nextCharIndex;
}
final Collection all = candidatesProvider.getAllCandidates(ctx);
if (all.isEmpty()) {
return -1;
}
String opBuffer = buffer.substring(nextCharIndex).trim();
if (opBuffer.isEmpty()) {
candidates.addAll(all);
} else {
for (String name : all) {
if (name.startsWith(opBuffer)) {
candidates.add(name);
}
}
Collections.sort(candidates);
}
return nextCharIndex;
}
}