EnumeratedAttribute (Apache Ant API)
Description: declaration: package: org.apache.tools.ant.types, class: EnumeratedAttribute

Package org.apache.tools.ant.types

# Class EnumeratedAttribute

java.lang.Object
org.apache.tools.ant.types.EnumeratedAttribute

Direct Known Subclasses:
  `AggregateTransformer.Format`, `Arc.ArcType`, `Available.FileDir`, `CharSet`, `Checksum.FormatElement`, `Comparison`, `Definer.Format`, `Definer.OnError`, `EchoProperties.FormatAttribute`, `EchoXML.NamespacePolicy`, `EjbJar.CMPVersion`, `EjbJar.NamingScheme`, `EmailTask.Encoding`, `ExecuteOn.FileDirBoth`, `FilterSet.OnMissing`, `FixCRLF.AddAsisRemove`, `FixCRLF.CrLf`, `FixCrLfFilter.AddAsisRemove`, `FixCrLfFilter.CrLf`, `ForkDefinition.ForkMode`, `FormatterElement.TypeAttribute`, `FTP.Action`, `FTP.FTPSystemType`, `FTP.Granularity`, `FTP.LanguageCode`, `FTPTask.Action`, `FTPTask.FTPSystemType`, `FTPTask.Granularity`, `ImageIOTask.ImageFormat`, `Input.HandlerType`, `IsLastModified.CompareMode`, `Jar.FilesetManifestConfig`, `Jar.StrictMode`, `Javadoc.AccessType`, `JDependTask.FormatAttribute`, `Jmod.ResolutionWarningReason`, `JUnitTask.ForkMode`, `JUnitTask.SummaryAttribute`, `Length.FileMode`, `Link.CompressionLevel`, `Link.Endianness`, `Link.VMType`, `ListenerDefinition.ListenerType`, `LogLevel`, `ManifestTask.Mode`, `Mapper.MapperType`, `ModifiedSelector.AlgorithmName`, `ModifiedSelector.CacheName`, `ModifiedSelector.ComparatorName`, `MSVSS.CurrentModUpdated`, `MSVSS.WritableFiles`, `MSVSSHISTORY.BriefCodediffNofile`, `NetRexxC.TraceAttr`, `NetRexxC.VerboseAttr`, `PathConvert.TargetOs`, `PresentSelector.FilePresence`, `PropertyFile.Entry.Operation`, `PropertyFile.Entry.Type`, `PropertyFile.Unit`, `PropertySet.BuiltinPropertySetName`, `Quantifier`, `Recorder.ActionChoices`, `Scale.ProportionsAttribute`, `Scale.ProportionsAttribute`, `SizeSelector.ByteUnits`, `SQLExec.DelimiterType`, `SQLExec.OnError`, `Tar.TarCompressionMethod`, `Tar.TarLongFileMode`, `TimeComparison`, `Tstamp.Unit`, `Type.FileDir`, `TypeSelector.FileType`, `Untar.UntarCompressionMethod`, `WaitFor.Unit`, `Zip.Duplicate`, `Zip.UnicodeExtraField`, `Zip.WhenEmpty`, `Zip.Zip64ModeAttribute`

public abstract class EnumeratedAttribute extends Object
Helper class for attributes that can only take one of a fixed list of values.

See `FixCRLF` for an example.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected String`
  `value`
  The selected value in this enumeration.

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  `protected`
  `EnumeratedAttribute()`
  bean constructor

- ## Method Summary

  Modifier and Type
  Method
  Description
  `final boolean`
  `containsValue(String value)`
  Is this value included in the enumeration?
  `final int`
  `getIndex()`
  `static EnumeratedAttribute`
  `getInstance(Class<? extends EnumeratedAttribute> clazz, String value)`
  Factory method for instantiating EAs via API in a more developer friendly way.
  `final String`
  `getValue()`
  `abstract String[]`
  `getValues()`
  This is the only method a subclass needs to implement.
  `final int`
  `indexOfValue(String value)`
  get the index of a value in this enumeration.
  `void`
  `setValue(String value)`
  Invoked by `IntrospectionHelper`.
  `String`
  `toString()`
  Convert the value to its string form.

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Field Details

  - ### value

    protected String value
    The selected value in this enumeration.

- ## Constructor Details

  - ### EnumeratedAttribute

    protected EnumeratedAttribute()
    bean constructor

- ## Method Details

  - ### getValues

    public abstract String[] getValues()
    This is the only method a subclass needs to implement.
    Returns:
      an array holding all possible values of the enumeration. The order of elements must be fixed so that `indexOfValue(String)` always return the same index for the same value.

  - ### getInstance

    public static EnumeratedAttribute getInstance(Class<? extends EnumeratedAttribute> clazz, String value) throws BuildException
    Factory method for instantiating EAs via API in a more developer friendly way.
    Parameters:
      `clazz` - Class, extending EA, which to instantiate
      `value` - The value to set on that EA
    Returns:
      Configured EA
    Throws:
      `BuildException` - If the class could not be found or the value is not valid for the given EA-class.
    See Also:
      - https://issues.apache.org/bugzilla/show_bug.cgi?id=14831

  - ### setValue

    public void setValue(String value) throws BuildException
    Invoked by `IntrospectionHelper`.
    Parameters:
      `value` - the `String` value of the attribute
    Throws:
      `BuildException` - if the value is not valid for the attribute

  - ### containsValue

    public final boolean containsValue(String value)
    Is this value included in the enumeration?
    Parameters:
      `value` - the `String` value to look up
    Returns:
      true if the value is valid

  - ### indexOfValue

    public final int indexOfValue(String value)
    get the index of a value in this enumeration.
    Parameters:
      `value` - the string value to look for.
    Returns:
      the index of the value in the array of strings or -1 if it cannot be found.
    See Also:
      - `getValues()`

  - ### getValue

    public final String getValue()
    Returns:
      the selected value.

  - ### getIndex

    public final int getIndex()
    Returns:
      the index of the selected value in the array.
    See Also:
      - `getValues()`

  - ### toString

    public String toString()
    Convert the value to its string form.
    Overrides:
      `toString` in class `Object`
    Returns:
      the string form of the value.