org.mvel2.sh.command.file.DirList Maven / Gradle / Ivy

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With inspiration from other libraries

There is a newer version: 2.12.15

/**
 * MVEL 2.0
 * Copyright (C) 2007 The Codehaus
 * Mike Brock, Dhanji Prasanna, John Graham, Mark Proctor
 *
 * Licensed 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.mvel2.sh.command.file;

import org.mvel2.sh.Command;
import org.mvel2.sh.CommandException;
import org.mvel2.sh.ShellSession;

import java.io.File;


public class DirList implements Command {
  public Object execute(ShellSession session, String[] args) {
    File current = new File(session.getEnv().get("$CWD"));

    if (!current.isDirectory())
      throw new CommandException("cannot list directory : " + session.getEnv().get("$CWD") + " is not a directory");

    File[] files = current.listFiles();

    if (files.length == 0) return null;
    else {
      System.out.append("Total ").append(String.valueOf(files.length)).append("\n");
    }

    for (File file : current.listFiles()) {
      if (file.isDirectory()) {
        System.out.append(file.getName()).append("/");
      }
      else {
        System.out.append(file.getName());
      }
      System.out.append("\n");
    }
    System.out.flush();

    return null;
  }


  public String getDescription() {
    return "performs a list of files and directories in the current working dir.";
  }

  public String getHelp() {
    return "no help yet";
  }
}