org.jboss.as.cli.handlers.SimpleTabCompleter 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.handlers;
import java.util.ArrayList;
import java.util.Arrays;
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 SimpleTabCompleter implements CommandLineCompleter {
public static final SimpleTabCompleter BOOLEAN = new SimpleTabCompleter(new String[]{"false", "true"});
private final List all;
public SimpleTabCompleter(String[] candidates) {
if(candidates == null) {
throw new IllegalArgumentException("Candidates can't be null");
}
all = Arrays.asList(candidates);
}
/* (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;
}
if(nextCharIndex == buffer.length()) {
candidates.addAll(all);
return nextCharIndex;
}
String[] split = buffer.split("\\s+");
int result;
final String chunk;
if(Character.isWhitespace(buffer.charAt(buffer.length() - 1))) {
chunk = null;
result = buffer.length();
} else {
chunk = split[split.length - 1];
result = buffer.length() - 1;
while(result >= 0 && !Character.isWhitespace(buffer.charAt(result))) {
--result;
}
++result;
}
final List remainingArgs = new ArrayList(all);
int maxI = chunk == null ? split.length : split.length - 1;
for(int i = 0; i < maxI; ++i) {
String arg = split[i];
int equalsIndex = arg.indexOf('=');
if(equalsIndex >= 0) {
arg = arg.substring(0, equalsIndex + 1);
}
remainingArgs.remove(arg);
}
if (chunk == null) {
candidates.addAll(remainingArgs);
} else {
for(String name : remainingArgs) {
if(name.startsWith(chunk)) {
candidates.add(name);
}
}
Collections.sort(candidates);
}
return result;
}
}