/*
 * Copyright (c) 2002-2012, the original author or authors.
 *
 * This software is distributable under the BSD license. See the terms of the
 * BSD license in the documentation provided with this software.
 *
 * http://www.opensource.org/licenses/bsd-license.php
 */
package jdk.internal.jline.console.completer;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.SortedSet;
import java.util.TreeSet;

import static jdk.internal.jline.internal.Preconditions.checkNotNull;

Completer for a set of strings.
Author:Jason Dillon
Since:2.3
/** * Completer for a set of strings. * * @author <a href="mailto:jason@planet57.com">Jason Dillon</a> * @since 2.3 */
public class StringsCompleter implements Completer { private final SortedSet<String> strings = new TreeSet<String>(); public StringsCompleter() { // empty } public StringsCompleter(final Collection<String> strings) { checkNotNull(strings); getStrings().addAll(strings); } public StringsCompleter(final String... strings) { this(Arrays.asList(strings)); } public Collection<String> getStrings() { return strings; } public int complete(final String buffer, final int cursor, final List<CharSequence> candidates) { // buffer could be null checkNotNull(candidates); if (buffer == null) { candidates.addAll(strings); } else { for (String match : strings.tailSet(buffer)) { if (!match.startsWith(buffer)) { break; } candidates.add(match); } } if (candidates.size() == 1) { candidates.set(0, candidates.get(0) + " "); } return candidates.isEmpty() ? -1 : 0; } }