001    package org.crsh.cmdline.completers;
002    
003    import java.io.File;
004    import java.util.Arrays;
005    import java.util.Collection;
006    
007    /**
008     * A completer for the current file system.
009     * <ul>
010     *   <li>When the prefix is absolute (it starts with <code>/</code> char) completion will be done from the prefix</li>
011     *   <li>When the prefix is relative (it does not start with a <code>/</code> char, the completion is done from the
012     *   directory evaluated with the expression <code>new java.io.File(".").getCanonicalPath()</code></li>
013     * </ul>
014     *
015     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
016     */
017    public class FileCompleter extends AbstractPathCompleter<File> {
018    
019      @Override
020      protected String getCurrentPath() throws Exception {
021        return new File(".").getCanonicalPath();
022      }
023    
024      @Override
025      protected File getPath(String path) {
026        return new File(path);
027      }
028    
029      @Override
030      protected boolean exists(File path) {
031        return path.exists();
032      }
033    
034      @Override
035      protected boolean isDirectory(File path) {
036        return path.isDirectory();
037      }
038    
039      @Override
040      protected boolean isFile(File path) {
041        return path.isFile();
042      }
043    
044      @Override
045      protected Collection<File> getChilren(File path) {
046        File[] files = path.listFiles();
047        return files != null ? Arrays.asList(files) : null;
048      }
049    
050      @Override
051      protected String getName(File path) {
052        return path.getName();
053      }
054    }