/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
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 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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 * 5. Products derived from this software may not be called "Apache"
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
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 * information on the Apache Software Foundation, please see
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 */
package org.apache.tools.ant.taskdefs;

import org.apache.tools.ant.*;

import java.io.*;

/**
 * Deletes a single file or a set of files defined by a pattern.
 *
 * @author stefano@apache.org
 * @author Tom Dimock <a href="mailto:tad1@cornell.edu">tad1@cornell.edu</a>
 */
public class Delete extends MatchingTask {

  private File delDir = null;
  private int verbosity = project.MSG_VERBOSE;
  private File f = null;

  /**
   * Set the name of a single file to be removed.
   *
   * @param file the file to be deleted
   */
  public void setFile(String file) {
    f = project.resolveFile(file);
  }

  /**
   * Set the directory from which files are to be deleted
   *
   * @param dir the directory path.
   */
  public void setDir(String dir) {
    delDir = project.resolveFile(dir);
  }

  /**
   * Used to force listing of all names of deleted files.
   *
   * @param verbose "true" or "on"
   */
  public void setVerbose(String verbose) {

    if ("true".equalsIgnoreCase(verbose.trim()) || "on".equalsIgnoreCase(verbose.trim())) {
      this.verbosity = project.MSG_INFO;
    }
    else {
      this.verbosity = project.MSG_VERBOSE;
    }
  }

  /**
   * Make it so.  Delete the file(s).
   *
   * @throws BuildException
   */
  public void execute() throws BuildException {

    if (f == null && delDir == null) {
      throw new BuildException("<file> or <dir> attribute must be set!");
    }

    // old <delete> functionality must still work
    if (f != null) {
      if (f.exists()) {
        if (f.isDirectory()) {
          project
            .log("Directory: " + f.getAbsolutePath()
                 + " cannot be removed with delete.  Use Deltree instead.");
        }
        else {
          project.log("Deleting: " + f.getAbsolutePath());
          f.delete();
	  if (f.exists()) {
	      throw new BuildException("Unable to delete file " + f.getAbsolutePath());
          }
        }
      }
    }

    // now we'll do the fancy pattern-driven deletes
    if (delDir == null) {
      return;
    }
    if (!delDir.exists()) {
      throw new BuildException("dir does not exist!");
    }
    DirectoryScanner ds    = super.getDirectoryScanner(delDir);
    String[]         files = ds.getIncludedFiles();

    if (files.length > 0) {
      project.log("Deleting " + files.length + " files from " + delDir.getAbsolutePath());
      for (int i = 0; i < files.length; i++) {
        File f = new File(delDir, files[i]);

        if (f.exists()) {
          project.log("Deleting: " + f.getAbsolutePath(), verbosity);
          f.delete();
	  if (f.exists()) {
	      throw new BuildException("Unable to delete " + f.getAbsolutePath());
          }
        }
      }
    }
  }
}