Class SizeSelector
- All Implemented Interfaces:
Cloneable,Parameterizable,ResourceSelector,ExtendFileSelector,FileSelector
- Since:
- 1.5
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic classEnumerated attribute with the values for units.static classEnumerated attribute with the values for size comparison. -
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final StringUsed for parameterized custom selectorstatic final StringUsed for parameterized custom selectorstatic final StringUsed for parameterized custom selectorFields inherited from class org.apache.tools.ant.types.selectors.BaseExtendSelector
parametersFields inherited from class org.apache.tools.ant.ProjectComponent
description, location, project -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionbooleanisSelected(File basedir, String filename, File file) The heart of the matter.voidsetParameters(Parameter... parameters) When using this as a custom selector, this method will be called.voidsetUnits(SizeSelector.ByteUnits units) Sets the units to use for the comparison.voidsetValue(long size) A size selector needs to know what size to base its selecting on.voidThis 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.toString()Returns aStringobject representing the specified SizeSelector.voidChecks to make sure all settings are kosher.Methods inherited from class org.apache.tools.ant.types.selectors.BaseExtendSelector
getParametersMethods inherited from class org.apache.tools.ant.types.selectors.BaseSelector
getError, setError, setError, validateMethods inherited from class org.apache.tools.ant.types.DataType
checkAttributesAllowed, checkChildrenAllowed, circularReference, clone, dieOnCircularReference, dieOnCircularReference, dieOnCircularReference, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getDataTypeName, getRefid, invokeCircularReferenceCheck, isChecked, isReference, noChildrenAllowed, pushAndInvokeCircularReferenceCheck, setChecked, setRefid, tooManyAttributesMethods inherited from class org.apache.tools.ant.ProjectComponent
getDescription, getLocation, getProject, log, log, setDescription, setLocation, setProjectMethods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitMethods inherited from interface org.apache.tools.ant.types.selectors.FileSelector
isSelected
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Field Details
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SIZE_KEY
Used for parameterized custom selector- See Also:
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UNITS_KEY
Used for parameterized custom selector- See Also:
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WHEN_KEY
Used for parameterized custom selector- See Also:
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Constructor Details
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SizeSelector
public SizeSelector()
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Method Details
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toString
Returns aStringobject representing the specified SizeSelector. This is "{sizeselector value: " + <"compare", "less", "more", "equal"> + "}". -
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.
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setUnits
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.
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setWhen
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:
when- The comparison to perform, an EnumeratedAttribute.
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setParameters
When using this as a custom selector, this method will be called. It translates each parameter into the appropriate setXXX() call.- Specified by:
setParametersin interfaceParameterizable- Overrides:
setParametersin classBaseExtendSelector- Parameters:
parameters- the complete set of parameters for this selector.
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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:
verifySettingsin classBaseSelector
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isSelected
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:
isSelectedin interfaceFileSelector- Specified by:
isSelectedin classBaseExtendSelector- 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.
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