ShowBackups.java

package org.basex.core.cmd;

import static org.basex.core.Text.*;

import java.io.IOException;
import org.basex.core.Command;
import org.basex.core.CommandBuilder;
import org.basex.core.Commands.Cmd;
import org.basex.core.Commands.CmdShow;
import org.basex.core.Context;
import org.basex.core.User;
import org.basex.io.IO;
import org.basex.io.IOFile;
import org.basex.util.Table;
import org.basex.util.list.StringList;
import org.basex.util.list.TokenList;

/**
 * Evaluates the 'show backups' command and shows available backups.
 *
 * @author BaseX Team 2005-12, BSD License
 * @author Christian Gruen
 */
public final class ShowBackups extends Command {
  /**
   * Default constructor.
   */
  public ShowBackups() {
    super(User.CREATE);
  }

  @Override
  protected boolean run() throws IOException {
    final Table table = new Table();
    table.description = BACKUPS;
    table.header.add(NAME);
    table.header.add(SIZE);

    for(final IO f : mprop.dbpath().children()) {
      final String name = f.name();
      if(!name.endsWith(IO.ZIPSUFFIX)) continue;
      final TokenList tl = new TokenList();
      tl.add(name);
      tl.add(f.length());
      table.contents.add(tl);
    }
    table.sort();
    out.println(table.finish());
    return true;
  }

  @Override
  public void build(final CommandBuilder cb) {
    cb.init(Cmd.SHOW + " " + CmdShow.BACKUPS);
  }

  /**
   * Returns all backups of the specified database.
   * @param db database
   * @param full return full path
   * @param ctx database context
   * @return available backups
   */
  public static StringList list(final String db, final boolean full,
      final Context ctx) {

    final StringList sl = new StringList();
    for(final IOFile f : ctx.mprop.dbpath().children()) {
      final String name = f.name();
      if(name.matches(db + IO.DATEPATTERN + IO.ZIPSUFFIX)) {
        sl.add(full ? f.path() : name.replaceAll(IO.ZIPSUFFIX + '$', ""));
      }
    }
    sl.sort(false, false);
    return sl;
  }
}