Package com.iizix.util

Class FileChangedChecker

java.lang.Object
com.iizix.util.FileChangedChecker
public class FileChangedChecker extends Object
This class is used to check for file modifications of the file time stamp and/or the file size.
Author:
Christopher Mindus

  • Constructor Details

    • FileChangedChecker

      public FileChangedChecker(File file)
      Creates the file change checker instance.

    • FileChangedChecker

      public FileChangedChecker(String fileName)
      Creates the file change checker instance.

  • Method Details

    • getFileName

      public String getFileName()
      Gets the file name being checked.
      Returns:
      The file name specified in the constructor or the path to the file name when the instance was constructed with the File parameter.

    • hasChanged

      public boolean hasChanged()
      Checks if the file has changed.
      Returns:
      true if the file has changed in size or last modified time, false otherwise.

    • update

      public void update()
      Requests an update of the file size and last modification time, if the file has been changed.

    • lastModified

      public long lastModified()
      Returns the time that the file denoted by this abstract pathname was last modified.
      Returns:
      A long value representing the time the file was last modified, measured in milliseconds since the epoch (00:00:00 GMT, January 1, 1970), or 0L if the file does not exist or if an I/O error occurs.

    • length

      public long length()
      Returns the length of the file denoted by this abstract pathname. The return value is unspecified if this pathname denotes a directory.
      Returns:
      The length, in bytes, of the file denoted by this abstract pathname, or 0L if the file does not exist. Some operating systems may return 0L for pathnames denoting system-dependent entities such as devices or pipes.

    • isNewerThan

      public boolean isNewerThan(File file)
      Checks if this file is newer than the one specified. A new time stamp is read, the stored one is not used.
      Parameters:
      file - The file to compare last modified time with.
      Returns:
      true if this file is newer than the one specified in the parameter, false otherwise.

    • isNewerThan

      public boolean isNewerThan(String fileName)
      Checks if this file is newer than the one specified. A new time stamp is read, the stored one is not used.
      Parameters:
      fileName - The file name to compare last modified time with.
      Returns:
      true if this file is newer than the one specified in the parameter, false otherwise.