Class SizeSelector

All Implemented Interfaces:
Cloneable, Parameterizable, ResourceSelector, ExtendFileSelector, FileSelector

public class SizeSelector extends BaseExtendSelector
Selector that filters files based on their size.
  • Field Details

  • Constructor Details

    • SizeSelector

      public SizeSelector()
  • Method Details

    • toString

      public String toString()
      Returns a String object representing the specified SizeSelector. This is "{sizeselector value: " + <"compare", "less", "more", "equal"> + "}".
      toString in class DataType
      a string describing this object
    • setValue

      public void setValue(long size)
      A size selector needs to know what size to base its selecting on. This will be further modified by the multiplier to get an actual size limit.
      size - the size to select against expressed in units.
    • setUnits

      public void setUnits(SizeSelector.ByteUnits units)
      Sets the units to use for the comparison. This is a little complicated because common usage has created standards that play havoc with capitalization rules. Thus, some people will use "K" for indicating 1000's, when the SI standard calls for "k". Others have tried to introduce "K" as a multiple of 1024, but that falls down when you reach "M", since "m" is already defined as 0.001.

      To get around this complexity, a number of standards bodies have proposed the 2^10 standard, and at least one has adopted it. But we are still left with a populace that isn't clear on how capitalization should work.

      We therefore ignore capitalization as much as possible. Completely mixed case is not possible, but all upper and lower forms are accepted for all long and short forms. Since we have no need to work with the 0.001 case, this practice works here.

      This function translates all the long and short forms that a unit prefix can occur in and translates them into a single multiplier.

      units - The units to compare the size to, using an EnumeratedAttribute.
    • setWhen

      public void setWhen(SizeSelector.SizeComparisons when)
      This specifies when the file should be selected, whether it be when the file matches a particular size, when it is smaller, or whether it is larger.
      when - The comparison to perform, an EnumeratedAttribute.
    • setParameters

      public void setParameters(Parameter... parameters)
      When using this as a custom selector, this method will be called. It translates each parameter into the appropriate setXXX() call.
      Specified by:
      setParameters in interface Parameterizable
      setParameters in class BaseExtendSelector
      parameters - the complete set of parameters for this selector.
    • verifySettings

      public void verifySettings()

      Checks to make sure all settings are kosher. In this case, it means that the size attribute has been set (to a positive value), that the multiplier has a valid setting, and that the size limit is valid. Since the latter is a calculated value, this can only fail due to a programming error.

      If a problem is detected, the setError() method is called.

      verifySettings in class BaseSelector
    • isSelected

      public boolean isSelected(File basedir, String filename, File file)
      The heart of the matter. This is where the selector gets to decide on the inclusion of a file in a particular fileset.
      Specified by:
      isSelected in interface FileSelector
      Specified by:
      isSelected in class BaseExtendSelector
      basedir - A object for the base directory.
      filename - The name of the file to check.
      file - A File object for this filename.
      whether the file should be selected or not.