/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.karaf.shell.console.completer;
import java.io.File;
import java.util.List;
import org.apache.felix.service.command.CommandSession;
import org.apache.karaf.shell.console.Completer;
/**
* <p>A file name completer takes the buffer and issues a list of
* potential completions.</p>
*
* <p>This completer tries to behave as similar as possible to
* <i>bash</i>'s file name completion (using GNU readline)
* with the following exceptions:</p>
*
* <ul>
* <li>Candidates that are directories will end with "/"</li>
* <li>Wildcard regular expressions are not evaluated or replaced</li>
* <li>The "~" character can be used to represent the user's home,
* but it cannot complete to other users' homes, since java does
* not provide any way of determining that easily</li>
* </ul>
*
* @author <a href="mailto:mwp1@cornell.edu">Marc Prud'hommeaux</a>
* @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
* @since 2.3
*/
@Deprecated
public class FileCompleter implements Completer
{
private static String OS = System.getProperty("os.name").toLowerCase();
// TODO: Handle files with spaces in them
private static final boolean OS_IS_WINDOWS = isWindows();
public FileCompleter(CommandSession session) {
}
public static boolean isWindows() {
return (OS.indexOf("win") >= 0);
}
public int complete(String buffer, final int cursor, final List<String> candidates) {
// buffer can be null
if (candidates == null) {
return 0;
}
if (buffer == null) {
buffer = "";
}
if (OS_IS_WINDOWS) {
buffer = buffer.replace('/', '\\');
}
String translated = buffer;
File homeDir = getUserHome();
// Special character: ~ maps to the user's home directory
if (translated.startsWith("~" + separator())) {
translated = homeDir.getPath() + translated.substring(1);
}
else if (translated.startsWith("~")) {
translated = homeDir.getParentFile().getAbsolutePath();
}
else if (!(translated.startsWith(separator()))) {
String cwd = getUserDir().getAbsolutePath();
translated = cwd + separator() + translated;
}
File file = new File(translated);
final File dir;
if (translated.endsWith(separator())) {
dir = file;
}
else {
dir = file.getParentFile();
}
File[] entries = dir == null ? new File[0] : dir.listFiles();
return matchFiles(buffer, translated, entries, candidates);
}
protected String separator() {
return File.separator;
}
protected File getUserHome() {
return new File(System.getProperty("user.home"));
}
protected File getUserDir() {
return new File(".");
}
protected int matchFiles(final String buffer, final String translated, final File[] files, final List<String> candidates) {
if (files == null) {
return -1;
}
int matches = 0;
// first pass: just count the matches
for (File file : files) {
if (file.getAbsolutePath().startsWith(translated)) {
matches++;
}
}
for (File file : files) {
if (file.getAbsolutePath().startsWith(translated)) {
CharSequence name = file.getName() + (matches == 1 && file.isDirectory() ? separator() : " ");
candidates.add(render(file, name).toString());
}
}
final int index = buffer.lastIndexOf(separator());
return index + separator().length();
}
protected CharSequence render(final File file, final CharSequence name) {
return name;
}
}