org.apache.uima.resource.metadata

## Interface FsIndexDescription

- All Superinterfaces:
    Cloneable, MetaDataObject, Serializable, XMLizable

      public interface FsIndexDescription
      extends MetaDataObject

  A description of a CAS feature structure index. This implements `MetaDataObject`, which implements `XMLizable`, so it can be serialized to and deserialized from an XML element.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static FsIndexDescription[]` | `EMPTY_FS_INDEX_DESCRIPTIONS`
    `static String` | `KIND_BAG` Identifies a Bag index.
    `static String` | `KIND_SET` Identifies a Set index.
    `static String` | `KIND_SORTED` Identifies a Sorted index.

  - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `FsIndexKeyDescription[]` | `getKeys()` Gets the keys for this index.
    `String` | `getKind()` Gets the "kind" of index.
    `String` | `getLabel()` Gets the label of this index.
    `String` | `getTypeName()` Gets the Type name for this index.
    `void` | `setKeys(FsIndexKeyDescription[] aKeys)` Sets the keys for this index.
    `void` | `setKind(String aKind)` Sets the "kind" of index.
    `void` | `setLabel(String aLabel)` Sets the label of this index.
    `void` | `setTypeName(String aTypeName)` Sets the Type name for this index.

    - ### Methods inherited from interface org.apache.uima.resource.metadata.MetaDataObject

      `clone, equals, getAttributeValue, getSourceUrl, getSourceUrlString, isModifiable, listAttributes, setAttributeValue, setSourceUrl`

    - ### Methods inherited from interface org.apache.uima.util.XMLizable

      `buildFromXMLElement, buildFromXMLElement, toXML, toXML, toXML, toXML`

- - ### Field Detail

    - #### EMPTY_FS_INDEX_DESCRIPTIONS

          static final FsIndexDescription[] EMPTY_FS_INDEX_DESCRIPTIONS

    - #### KIND_SORTED

          static final String KIND_SORTED

      Identifies a Sorted index.
      See Also:
        `FSIndex`, Constant Field Values

    - #### KIND_SET

          static final String KIND_SET

      Identifies a Set index.
      See Also:
        `FSIndex`, Constant Field Values

    - #### KIND_BAG

          static final String KIND_BAG

      Identifies a Bag index.
      See Also:
        `FSIndex`, Constant Field Values

  - ### Method Detail

    - #### getLabel

          String getLabel()

      Gets the label of this index. This is the identifier used to retrieve the index from the CAS's Index Repository.
      Returns:
        the label of this index.

    - #### setLabel

          void setLabel(String aLabel)

      Sets the label of this index. This is the identifier used to retrieve the index from the CAS's Index Repository.
      Parameters:
        `aLabel` - the label of this index.

    - #### getTypeName

          String getTypeName()

      Gets the Type name for this index. This determines what type of FeatureStructures are contained in the index.
      Returns:
        the type name for this index

    - #### setTypeName

          void setTypeName(String aTypeName)

      Sets the Type name for this index. This determines what type of FeatureStructures are contained in the index.
      Parameters:
        `aTypeName` - the type name for this index

    - #### getKind

          String getKind()

      Gets the "kind" of index. There are currently three kinds of indexes - "sorted", "set", and "bag" (see `FSIndex` for definitions). If this is `null`, "sorted" is assumed as the default.
      Returns:
        the kind of index

    - #### setKind

          void setKind(String aKind)

      Sets the "kind" of index. There are currently three kinds of indexes - sorted, set, and bag (see `FSIndex` for definitions). If this is `null`, "sorted" is assumed as the default.
      Parameters:
        `aKind` - the kind of index

    - #### getKeys

          FsIndexKeyDescription[] getKeys()

      Gets the keys for this index. The keys determine the ordering of FeatureStructures in this index.
      Returns:
        the keys for this index

    - #### setKeys

          void setKeys(FsIndexKeyDescription[] aKeys)

      Sets the keys for this index. The keys determine the ordering of FeatureStructures in this index.
      Parameters:
        `aKeys` - the keys for this index

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