## org.apache.tools.ant.types.selectors
Class SizeSelector

    java.lang.Object
      |
      +--org.apache.tools.ant.ProjectComponent
            |
            +--org.apache.tools.ant.types.DataType
                  |
                  +--org.apache.tools.ant.types.selectors.BaseSelector
                        |
                        +--org.apache.tools.ant.types.selectors.BaseExtendSelector
                              |
                              +--org.apache.tools.ant.types.selectors.SizeSelector

All Implemented Interfaces:
  ExtendFileSelector, FileSelector, Parameterizable

public class SizeSelector
extends BaseExtendSelector

Selector that filters files based on their size.

Since:
  1.5
Author:
  Bruce Atherton

Nested Class Summary
`static class` `SizeSelector.ByteUnits` Enumerated attribute with the values for units.
`static class` `SizeSelector.SizeComparisons` Enumerated attribute with the values for size comparison.

Field Summary
`static java.lang.String` `SIZE_KEY` Used for parameterized custom selector
`static java.lang.String` `UNITS_KEY` Used for parameterized custom selector
`static java.lang.String` `WHEN_KEY` Used for parameterized custom selector

Fields inherited from class org.apache.tools.ant.types.selectors.BaseExtendSelector
`parameters`

Fields inherited from class org.apache.tools.ant.types.DataType
`checked, description, ref`

Fields inherited from class org.apache.tools.ant.ProjectComponent
`project`

Constructor Summary
`SizeSelector()` Creates a new `SizeSelector` instance.

Method Summary
`boolean` `isSelected(java.io.File basedir, java.lang.String filename, java.io.File file)` The heart of the matter.
`void` `setParameters(Parameter[] parameters)` When using this as a custom selector, this method will be called.
`void` `setUnits(SizeSelector.ByteUnits units)` Sets the units to use for the comparison.
`void` `setValue(long size)` A size selector needs to know what size to base its selecting on.
`void` `setWhen(SizeSelector.SizeComparisons cmp)` 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.
`java.lang.String` `toString()`
`void` `verifySettings()` Checks to make sure all settings are kosher.

Methods inherited from class org.apache.tools.ant.types.selectors.BaseExtendSelector
`getParameters`

Methods inherited from class org.apache.tools.ant.types.selectors.BaseSelector
`getError, setError, validate`

Methods inherited from class org.apache.tools.ant.types.DataType
`checkAttributesAllowed, checkChildrenAllowed, circularReference, dieOnCircularReference, getCheckedRef, getDescription, getRefid, isChecked, isReference, noChildrenAllowed, setChecked, setDescription, setRefid, tooManyAttributes`

Methods inherited from class org.apache.tools.ant.ProjectComponent
`getProject, log, log, setProject`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### SIZE_KEY

    public static final java.lang.String SIZE_KEY

  Used for parameterized custom selector

  See Also:
    Constant Field Values

### UNITS_KEY

    public static final java.lang.String UNITS_KEY

  Used for parameterized custom selector

  See Also:
    Constant Field Values

### WHEN_KEY

    public static final java.lang.String WHEN_KEY

  Used for parameterized custom selector

  See Also:
    Constant Field Values

Constructor Detail

### SizeSelector

    public SizeSelector()

  Creates a new `SizeSelector` instance.

Method Detail

### toString

    public java.lang.String toString()

  Overrides:
    `toString` in class `java.lang.Object`
  Returns:
    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.

  Parameters:
    `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.

  Parameters:
    `units` - The units to compare the size to, using an EnumeratedAttribute

### setWhen

    public void setWhen(SizeSelector.SizeComparisons cmp)

  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.

  Parameters:
    `cmp` - 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`
  Overrides:
    `setParameters` in class `BaseExtendSelector`
  Parameters:
    `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.

  Overrides:
    `verifySettings` in class `BaseSelector`

### isSelected

    public boolean isSelected(java.io.File basedir,
                              java.lang.String filename,
                              java.io.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`
  Parameters:
    `basedir` - A java.io.File object for the base directory
    `filename` - The name of the file to check
    `file` - A File object for this filename
  Returns:
    whether the file should be selected or not

Copyright © 2000-2003 Apache Software Foundation. All Rights Reserved.