org.apache.uima.cas

## Interface CAS

- All Superinterfaces:
    AbstractCas

      public interface CAS
      extends AbstractCas

  Object-oriented CAS (Common Analysis System) API.

  A `CAS` object provides the starting point for working with the CAS. It provides access to the type system, to indexes, iterators and filters (constraints). It also lets you create new annotations and other data structures. You can create a `CAS` object using static methods on the class `CasCreationUtils`.

  The `CAS` object is also the container that manages multiple Subjects of Analysis or Sofas. A Sofa represents some form of an unstructured artifact that is processed in a UIMA pipeline. The Java string called the "DocumentText" used in a UIMA text processing pipeline is an example of a Sofa. A Sofa can be analyzed independently using the standard UIMA programming model or analyzed together with other Sofas utilizing the Sofa programming model extensions.

  A Sofa is implemented as a built-in CAS type uima.cas.Sofa. Use `CAS.createSofa()` to instantiate a Sofa feature structure. The `SofaFS` class provides methods to set and get the features of a SofaFS. Although Sofas are implemented as standard feature structures, generic CAS APIs must never be used to create Sofas or set their features.

  Use `getView(String)` or `getView(SofaFS)` to obtain a view of a particular Sofa in the CAS. This view will provide access to the Sofa data (for example the document text) as well as the index repository, which contains metadata (annotations and other feature structures) about that Sofa.

  Use `getTypeSystem()` to access the type system. With a `TypeSystem` object, you can access the `Type` and `Feature` objects for the CAS built-in types. Note that this interface also provides constants for the names of the built-in types and features.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `DEFAULT_LANGUAGE_NAME`
    `static String` | `FEATURE_BASE_NAME_BEGIN` Base name of annotation begin feature.
    `static String` | `FEATURE_BASE_NAME_END` Base name of annotation end feature.
    `static String` | `FEATURE_BASE_NAME_HEAD` Base name of list head feature.
    `static String` | `FEATURE_BASE_NAME_LANGUAGE` Base name of document language feature.
    `static String` | `FEATURE_BASE_NAME_SOFA` Sofa ID feature that is the handle to a text Sofa.
    `static String` | `FEATURE_BASE_NAME_SOFAARRAY` Base name of Sofa array fs data feature.
    `static String` | `FEATURE_BASE_NAME_SOFAID` Base name of Sofa ID feature.
    `static String` | `FEATURE_BASE_NAME_SOFAMIME` Base name of Sofa mime type feature.
    `static String` | `FEATURE_BASE_NAME_SOFANUM` Base name of Sofa Number feature.
    `static String` | `FEATURE_BASE_NAME_SOFASTRING` Base name of Sofa string data feature.
    `static String` | `FEATURE_BASE_NAME_SOFAURI` Base name of Sofa URI feature.
    `static String` | `FEATURE_BASE_NAME_TAIL` Base name of list tail feature.
    `static String` | `FEATURE_FULL_NAME_BEGIN` Fully qualified name of annotation begin feature.
    `static String` | `FEATURE_FULL_NAME_END` Fully qualified name of annotation end feature.
    `static String` | `FEATURE_FULL_NAME_FLOAT_LIST_HEAD` Qualified name of float list head feature.
    `static String` | `FEATURE_FULL_NAME_FLOAT_LIST_TAIL` Qualified name of float list tail feature.
    `static String` | `FEATURE_FULL_NAME_FS_LIST_HEAD` Qualified name of fs list head feature.
    `static String` | `FEATURE_FULL_NAME_FS_LIST_TAIL` Qualified name of fs list tail feature.
    `static String` | `FEATURE_FULL_NAME_INTEGER_LIST_HEAD` Qualified name of integer list head feature.
    `static String` | `FEATURE_FULL_NAME_INTEGER_LIST_TAIL` Qualified name of integer list tail feature.
    `static String` | `FEATURE_FULL_NAME_LANGUAGE` Fully qualified name of document language feature.
    `static String` | `FEATURE_FULL_NAME_SOFA` Fully qualified name of annotation sofa feature.
    `static String` | `FEATURE_FULL_NAME_SOFAARRAY` Qualified name of Sofa array fs data feature.
    `static String` | `FEATURE_FULL_NAME_SOFAID` Qualified name of Sofa id feature.
    `static String` | `FEATURE_FULL_NAME_SOFAMIME` Qualified name of Sofa mime type feature.
    `static String` | `FEATURE_FULL_NAME_SOFANUM` Qualified name of Sofa number feature.
    `static String` | `FEATURE_FULL_NAME_SOFASTRING` Qualified name of Sofa string data feature.
    `static String` | `FEATURE_FULL_NAME_SOFAURI` Qualified name of Sofa URI feature.
    `static String` | `FEATURE_FULL_NAME_STRING_LIST_HEAD` Qualified name of string list head feature.
    `static String` | `FEATURE_FULL_NAME_STRING_LIST_TAIL` Qualified name of string list tail feature.
    `static String` | `NAME_DEFAULT_SOFA` Sofa name for the initial view's sofa.
    `static String` | `NAME_DEFAULT_TEXT_SOFA` Deprecated. As of v2.0, this is replaced by `NAME_DEFAULT_SOFA`, and the value has changed. In general, user code should not need to refer to this name.
    `static String` | `NAME_SPACE_UIMA_CAS` UIMA CAS name space.
    `static String` | `NAME_SPACE_UIMA_TCAS` Name of Text CAS name space.
    `static String` | `SOFA_INDEX_NAME` Sofa Index name.
    `static String` | `STD_ANNOTATION_INDEX` Name of the built-in index on annotations.
    `static String` | `TYPE_NAME_ANNOTATION` Name of annotation type.
    `static String` | `TYPE_NAME_ANNOTATION_BASE` Name of annotation base type.
    `static String` | `TYPE_NAME_ARRAY_BASE` ArrayBase type.
    `static String` | `TYPE_NAME_BOOLEAN` Boolean type.
    `static String` | `TYPE_NAME_BOOLEAN_ARRAY` Boolean array type.
    `static String` | `TYPE_NAME_BYTE` Byte type.
    `static String` | `TYPE_NAME_BYTE_ARRAY` Byte array type.
    `static String` | `TYPE_NAME_DOCUMENT_ANNOTATION` Name of document annotation type.
    `static String` | `TYPE_NAME_DOUBLE` Double type.
    `static String` | `TYPE_NAME_DOUBLE_ARRAY` Double array type.
    `static String` | `TYPE_NAME_EMPTY_FLOAT_LIST` Empty float type.
    `static String` | `TYPE_NAME_EMPTY_FS_LIST` Empty feature structure list type.
    `static String` | `TYPE_NAME_EMPTY_INTEGER_LIST` Empty integer list type.
    `static String` | `TYPE_NAME_EMPTY_STRING_LIST` Empty string list type.
    `static String` | `TYPE_NAME_FLOAT` Float type.
    `static String` | `TYPE_NAME_FLOAT_ARRAY` Float array type.
    `static String` | `TYPE_NAME_FLOAT_LIST` Float list type.
    `static String` | `TYPE_NAME_FS_ARRAY` Feature structure array type.
    `static String` | `TYPE_NAME_FS_LIST` Feature structure list type.
    `static String` | `TYPE_NAME_INTEGER` Integer type.
    `static String` | `TYPE_NAME_INTEGER_ARRAY` Integer array type.
    `static String` | `TYPE_NAME_INTEGER_LIST` Integer list type.
    `static String` | `TYPE_NAME_LIST_BASE` Abstract list base type.
    `static String` | `TYPE_NAME_LONG` Long type.
    `static String` | `TYPE_NAME_LONG_ARRAY` Long array type.
    `static String` | `TYPE_NAME_NON_EMPTY_FLOAT_LIST` Non-empty float list type.
    `static String` | `TYPE_NAME_NON_EMPTY_FS_LIST` Non-empty feature structure list type.
    `static String` | `TYPE_NAME_NON_EMPTY_INTEGER_LIST` Non-empty integer list type.
    `static String` | `TYPE_NAME_NON_EMPTY_STRING_LIST` Non-empty string list type.
    `static String` | `TYPE_NAME_SHORT` Short type.
    `static String` | `TYPE_NAME_SHORT_ARRAY` Short array type.
    `static String` | `TYPE_NAME_SOFA` Sofa type.
    `static String` | `TYPE_NAME_STRING` String type.
    `static String` | `TYPE_NAME_STRING_ARRAY` String array type.
    `static String` | `TYPE_NAME_STRING_LIST` String list type.
    `static String` | `TYPE_NAME_TOP` Top type.
    `static String` | `UIMA_CAS_PREFIX` UIMA CAS name space prefix to prepend to type names (adds an extra period to the name space proper.

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Deprecated Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addFsToIndexes(FeatureStructure fs)` Add a feature structure to all appropriate indexes in the repository associated with this CAS View.
    `<T extends AnnotationFS> AnnotationFS` | `createAnnotation(Type type, int begin, int end)` Create a new annotation.
    `ArrayFS` | `createArrayFS(int length)` Create a new feature structure array.
    `BooleanArrayFS` | `createBooleanArrayFS(int length)` Create a new Boolean array.
    `ByteArrayFS` | `createByteArrayFS(int length)` Create a new Byte array.
    `DoubleArrayFS` | `createDoubleArrayFS(int length)` Create a new Double array.
    `FeaturePath` | `createFeaturePath()` Create a feature path.
    `FeatureValuePath` | `createFeatureValuePath(String featureValuePath)` Create a feature-value path from a string.
    `<T extends FeatureStructure> FSIterator<T>` | `createFilteredIterator(FSIterator<T> it, FSMatchConstraint cons)` Create an iterator over structures satisfying a given constraint.
    `FloatArrayFS` | `createFloatArrayFS(int length)` Create a new int array.
    `<T extends FeatureStructure> T` | `createFS(Type type)` Create a new FeatureStructure.
    `IntArrayFS` | `createIntArrayFS(int length)` Create a new int array.
    `LongArrayFS` | `createLongArrayFS(int length)` Create a new Long array.
    `Marker` | `createMarker()` Sets a mark and returns the marker object set with the current mark which can be used to query when certain FSs were created.
    `ShortArrayFS` | `createShortArrayFS(int length)` Create a new Short array.
    `SofaFS` | `createSofa(SofaID sofaID, String mimeType)` Deprecated. As of v2.0, use `createView(String)` instead.
    `StringArrayFS` | `createStringArrayFS(int length)` Create a new String array.
    `CAS` | `createView(String localViewName)` Create a view and its underlying Sofa (subject of analysis).
    `<T extends FeatureStructure> ListIterator<T>` | `fs2listIterator(FSIterator<T> it)` Wrap a standard Java `ListIterator` around an FSListIterator.
    `<T extends AnnotationFS> AnnotationIndex<T>` | `getAnnotationIndex()` Get the standard annotation index.
    `<T extends AnnotationFS> AnnotationIndex<T>` | `getAnnotationIndex(Type type)` Get the standard annotation index restricted to a specific annotation type.
    `Type` | `getAnnotationType()` Get the type object for the annotation type.
    `Feature` | `getBeginFeature()` Get the feature object for the annotation begin feature.
    `ConstraintFactory` | `getConstraintFactory()` Get a constraint factory.
    `CAS` | `getCurrentView()` Get the Cas view that the current component should use.
    `<T extends AnnotationFS> T` | `getDocumentAnnotation()` Get the Document Annotation.
    `String` | `getDocumentLanguage()` Gets the language code for this document from the language feature of the special instance of the DocumentationAnnotation associated with this CAS.
    `String` | `getDocumentText()` Get the document text.
    `Feature` | `getEndFeature()` Get the feature object for the annotation end feature.
    `FSIndexRepository` | `getIndexRepository()` Get the index repository.
    `JCas` | `getJCas()` Get the JCas for this CAS.
    `JCas` | `getJCas(SofaFS aSofa)` Create a JCas view for a Sofa.
    `JCas` | `getJCas(SofaID aSofaID)` Deprecated. As of v2.0, use `getView(String)` followed by `getJCas()`.
    `org.apache.uima.cas.impl.LowLevelCAS` | `getLowLevelCAS()` Get an instance of the low-level CAS.
    `SofaFS` | `getSofa()` Get the Sofa feature structure associated with this CAS view.
    `SofaFS` | `getSofa(SofaID sofaID)` Deprecated. As of v2.0, use {#getView(String)}. From the view you can access the Sofa data, or call `getSofa()` if you truly need to access the SofaFS object.
    `FeatureStructure` | `getSofaDataArray()` Get the Sofa data array.
    `InputStream` | `getSofaDataStream()` Get the Sofa data as a byte stream.
    `String` | `getSofaDataString()` Get the Sofa Data String (a.k.a.
    `String` | `getSofaDataURI()` Get the Sofa data array.
    `FSIterator<SofaFS>` | `getSofaIterator()` Get iterator for all SofaFS in the CAS.
    `String` | `getSofaMimeType()` Get the mime type of the Sofa data being analyzed.
    `TypeSystem` | `getTypeSystem()` Return the type system of this CAS instance.
    `CAS` | `getView(SofaFS aSofa)` Get the view for a Sofa (subject of analysis).
    `CAS` | `getView(String localViewName)` Get the view for a Sofa (subject of analysis).
    `Iterator<CAS>` | `getViewIterator()` Get iterator over all views in this CAS.
    `Iterator<CAS>` | `getViewIterator(String localViewNamePrefix)` Get iterator over all views with the given name prefix.
    `String` | `getViewName()` Get the view name.
    `AutoCloseable` | `protectIndexes()` Call this method to set up a region, ended by a `AutoCloseable.close()` call on the returned object, You can use this or the `protectIndexes(Runnable)` method to protected the indexes.
    `void` | `protectIndexes(Runnable runnable)` Runs the code in the runnable inside a protection block, where any modifications to features done while in this block will be done in a way to protect any indexes which otherwise might become corrupted by the update action; the protection is achieved by temporarily removing the FS (if it is in the indexes), before the update happens.
    `void` | `removeFsFromIndexes(FeatureStructure fs)` Remove a feature structure from all indexes in the repository associated with this CAS View.
    `void` | `reset()` Reset the CAS, emptying it of all content.
    `void` | `setCurrentComponentInfo(ComponentInfo info)` Informs the CAS of relevant information about the component that is currently processing it.
    `void` | `setDocumentLanguage(String languageCode)` Sets the language for this document.
    `void` | `setDocumentText(String text)` Set the document text.
    `void` | `setSofaDataArray(FeatureStructure array, String mime)` Set the Sofa data as an ArrayFS.
    `void` | `setSofaDataString(String text, String mimetype)` Set the document text.
    `void` | `setSofaDataURI(String uri, String mime)` Set the Sofa data as a URI.
    `int` | `size()` Estimate the memory consumption of this CAS instance (in bytes).

    - ### Methods inherited from interface org.apache.uima.cas.AbstractCas

      `release`

- - ### Field Detail

    - #### NAME_SPACE_UIMA_CAS

          static final String NAME_SPACE_UIMA_CAS

      UIMA CAS name space.
      See Also:
        Constant Field Values

    - #### UIMA_CAS_PREFIX

          static final String UIMA_CAS_PREFIX

      UIMA CAS name space prefix to prepend to type names (adds an extra period to the name space proper.
      See Also:
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    - #### TYPE_NAME_TOP

          static final String TYPE_NAME_TOP

      Top type.
      See Also:
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    - #### TYPE_NAME_INTEGER

          static final String TYPE_NAME_INTEGER

      Integer type.
      See Also:
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    - #### TYPE_NAME_FLOAT

          static final String TYPE_NAME_FLOAT

      Float type.
      See Also:
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    - #### TYPE_NAME_STRING

          static final String TYPE_NAME_STRING

      String type.
      See Also:
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    - #### TYPE_NAME_BOOLEAN

          static final String TYPE_NAME_BOOLEAN

      Boolean type.
      See Also:
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    - #### TYPE_NAME_BYTE

          static final String TYPE_NAME_BYTE

      Byte type.
      See Also:
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    - #### TYPE_NAME_SHORT

          static final String TYPE_NAME_SHORT

      Short type.
      See Also:
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    - #### TYPE_NAME_LONG

          static final String TYPE_NAME_LONG

      Long type.
      See Also:
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    - #### TYPE_NAME_DOUBLE

          static final String TYPE_NAME_DOUBLE

      Double type.
      See Also:
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    - #### TYPE_NAME_ARRAY_BASE

          static final String TYPE_NAME_ARRAY_BASE

      ArrayBase type.
      See Also:
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    - #### TYPE_NAME_FS_ARRAY

          static final String TYPE_NAME_FS_ARRAY

      Feature structure array type.
      See Also:
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    - #### TYPE_NAME_INTEGER_ARRAY

          static final String TYPE_NAME_INTEGER_ARRAY

      Integer array type.
      See Also:
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    - #### TYPE_NAME_FLOAT_ARRAY

          static final String TYPE_NAME_FLOAT_ARRAY

      Float array type.
      See Also:
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    - #### TYPE_NAME_STRING_ARRAY

          static final String TYPE_NAME_STRING_ARRAY

      String array type.
      See Also:
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    - #### TYPE_NAME_BOOLEAN_ARRAY

          static final String TYPE_NAME_BOOLEAN_ARRAY

      Boolean array type.
      See Also:
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    - #### TYPE_NAME_BYTE_ARRAY

          static final String TYPE_NAME_BYTE_ARRAY

      Byte array type.
      See Also:
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    - #### TYPE_NAME_SHORT_ARRAY

          static final String TYPE_NAME_SHORT_ARRAY

      Short array type.
      See Also:
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    - #### TYPE_NAME_LONG_ARRAY

          static final String TYPE_NAME_LONG_ARRAY

      Long array type.
      See Also:
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    - #### TYPE_NAME_DOUBLE_ARRAY

          static final String TYPE_NAME_DOUBLE_ARRAY

      Double array type.
      See Also:
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    - #### TYPE_NAME_SOFA

          static final String TYPE_NAME_SOFA

      Sofa type.
      See Also:
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    - #### TYPE_NAME_ANNOTATION_BASE

          static final String TYPE_NAME_ANNOTATION_BASE

      Name of annotation base type.
      See Also:
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    - #### FEATURE_BASE_NAME_SOFANUM

          static final String FEATURE_BASE_NAME_SOFANUM

      Base name of Sofa Number feature.
      See Also:
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    - #### FEATURE_BASE_NAME_SOFAID

          static final String FEATURE_BASE_NAME_SOFAID

      Base name of Sofa ID feature.
      See Also:
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    - #### FEATURE_BASE_NAME_SOFAMIME

          static final String FEATURE_BASE_NAME_SOFAMIME

      Base name of Sofa mime type feature.
      See Also:
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    - #### FEATURE_BASE_NAME_SOFAURI

          static final String FEATURE_BASE_NAME_SOFAURI

      Base name of Sofa URI feature.
      See Also:
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    - #### FEATURE_BASE_NAME_SOFASTRING

          static final String FEATURE_BASE_NAME_SOFASTRING

      Base name of Sofa string data feature.
      See Also:
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    - #### FEATURE_BASE_NAME_SOFAARRAY

          static final String FEATURE_BASE_NAME_SOFAARRAY

      Base name of Sofa array fs data feature.
      See Also:
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    - #### FEATURE_FULL_NAME_SOFANUM

          static final String FEATURE_FULL_NAME_SOFANUM

      Qualified name of Sofa number feature.
      See Also:
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    - #### FEATURE_FULL_NAME_SOFAID

          static final String FEATURE_FULL_NAME_SOFAID

      Qualified name of Sofa id feature.
      See Also:
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    - #### FEATURE_FULL_NAME_SOFAMIME

          static final String FEATURE_FULL_NAME_SOFAMIME

      Qualified name of Sofa mime type feature.
      See Also:
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    - #### FEATURE_FULL_NAME_SOFAURI

          static final String FEATURE_FULL_NAME_SOFAURI

      Qualified name of Sofa URI feature.
      See Also:
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    - #### FEATURE_FULL_NAME_SOFASTRING

          static final String FEATURE_FULL_NAME_SOFASTRING

      Qualified name of Sofa string data feature.
      See Also:
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    - #### FEATURE_FULL_NAME_SOFAARRAY

          static final String FEATURE_FULL_NAME_SOFAARRAY

      Qualified name of Sofa array fs data feature.
      See Also:
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    - #### SOFA_INDEX_NAME

          static final String SOFA_INDEX_NAME

      Sofa Index name.
      See Also:
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    - #### NAME_DEFAULT_TEXT_SOFA

          @Deprecated
          static final String NAME_DEFAULT_TEXT_SOFA

      Deprecated. As of v2.0, this is replaced by `NAME_DEFAULT_SOFA`, and the value has changed. In general, user code should not need to refer to this name.
      Sofa name for the default text sofa.
      See Also:
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    - #### NAME_DEFAULT_SOFA

          static final String NAME_DEFAULT_SOFA

      Sofa name for the initial view's sofa.
      See Also:
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    - #### TYPE_NAME_LIST_BASE

          static final String TYPE_NAME_LIST_BASE

      Abstract list base type.
      See Also:
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    - #### TYPE_NAME_FS_LIST

          static final String TYPE_NAME_FS_LIST

      Feature structure list type.
      See Also:
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    - #### TYPE_NAME_NON_EMPTY_FS_LIST

          static final String TYPE_NAME_NON_EMPTY_FS_LIST

      Non-empty feature structure list type.
      See Also:
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    - #### TYPE_NAME_EMPTY_FS_LIST

          static final String TYPE_NAME_EMPTY_FS_LIST

      Empty feature structure list type.
      See Also:
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    - #### TYPE_NAME_INTEGER_LIST

          static final String TYPE_NAME_INTEGER_LIST

      Integer list type.
      See Also:
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    - #### TYPE_NAME_NON_EMPTY_INTEGER_LIST

          static final String TYPE_NAME_NON_EMPTY_INTEGER_LIST

      Non-empty integer list type.
      See Also:
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    - #### TYPE_NAME_EMPTY_INTEGER_LIST

          static final String TYPE_NAME_EMPTY_INTEGER_LIST

      Empty integer list type.
      See Also:
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    - #### TYPE_NAME_FLOAT_LIST

          static final String TYPE_NAME_FLOAT_LIST

      Float list type.
      See Also:
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    - #### TYPE_NAME_NON_EMPTY_FLOAT_LIST

          static final String TYPE_NAME_NON_EMPTY_FLOAT_LIST

      Non-empty float list type.
      See Also:
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    - #### TYPE_NAME_EMPTY_FLOAT_LIST

          static final String TYPE_NAME_EMPTY_FLOAT_LIST

      Empty float type.
      See Also:
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    - #### TYPE_NAME_STRING_LIST

          static final String TYPE_NAME_STRING_LIST

      String list type.
      See Also:
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    - #### TYPE_NAME_NON_EMPTY_STRING_LIST

          static final String TYPE_NAME_NON_EMPTY_STRING_LIST

      Non-empty string list type.
      See Also:
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    - #### TYPE_NAME_EMPTY_STRING_LIST

          static final String TYPE_NAME_EMPTY_STRING_LIST

      Empty string list type.
      See Also:
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    - #### FEATURE_BASE_NAME_HEAD

          static final String FEATURE_BASE_NAME_HEAD

      Base name of list head feature.
      See Also:
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    - #### FEATURE_BASE_NAME_TAIL

          static final String FEATURE_BASE_NAME_TAIL

      Base name of list tail feature.
      See Also:
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    - #### FEATURE_FULL_NAME_FS_LIST_HEAD

          static final String FEATURE_FULL_NAME_FS_LIST_HEAD

      Qualified name of fs list head feature.
      See Also:
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    - #### FEATURE_FULL_NAME_INTEGER_LIST_HEAD

          static final String FEATURE_FULL_NAME_INTEGER_LIST_HEAD

      Qualified name of integer list head feature.
      See Also:
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    - #### FEATURE_FULL_NAME_FLOAT_LIST_HEAD

          static final String FEATURE_FULL_NAME_FLOAT_LIST_HEAD

      Qualified name of float list head feature.
      See Also:
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    - #### FEATURE_FULL_NAME_STRING_LIST_HEAD

          static final String FEATURE_FULL_NAME_STRING_LIST_HEAD

      Qualified name of string list head feature.
      See Also:
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    - #### FEATURE_FULL_NAME_FS_LIST_TAIL

          static final String FEATURE_FULL_NAME_FS_LIST_TAIL

      Qualified name of fs list tail feature.
      See Also:
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    - #### FEATURE_FULL_NAME_INTEGER_LIST_TAIL

          static final String FEATURE_FULL_NAME_INTEGER_LIST_TAIL

      Qualified name of integer list tail feature.
      See Also:
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    - #### FEATURE_FULL_NAME_FLOAT_LIST_TAIL

          static final String FEATURE_FULL_NAME_FLOAT_LIST_TAIL

      Qualified name of float list tail feature.
      See Also:
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    - #### FEATURE_FULL_NAME_STRING_LIST_TAIL

          static final String FEATURE_FULL_NAME_STRING_LIST_TAIL

      Qualified name of string list tail feature.
      See Also:
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    - #### NAME_SPACE_UIMA_TCAS

          static final String NAME_SPACE_UIMA_TCAS

      Name of Text CAS name space.
      See Also:
        Constant Field Values

    - #### TYPE_NAME_ANNOTATION

          static final String TYPE_NAME_ANNOTATION

      Name of annotation type.
      See Also:
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    - #### TYPE_NAME_DOCUMENT_ANNOTATION

          static final String TYPE_NAME_DOCUMENT_ANNOTATION

      Name of document annotation type.
      See Also:
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    - #### FEATURE_BASE_NAME_SOFA

          static final String FEATURE_BASE_NAME_SOFA

      Sofa ID feature that is the handle to a text Sofa.
      See Also:
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    - #### FEATURE_BASE_NAME_BEGIN

          static final String FEATURE_BASE_NAME_BEGIN

      Base name of annotation begin feature.
      See Also:
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    - #### FEATURE_BASE_NAME_END

          static final String FEATURE_BASE_NAME_END

      Base name of annotation end feature.
      See Also:
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    - #### FEATURE_BASE_NAME_LANGUAGE

          static final String FEATURE_BASE_NAME_LANGUAGE

      Base name of document language feature.
      See Also:
        Constant Field Values

    - #### FEATURE_FULL_NAME_BEGIN

          static final String FEATURE_FULL_NAME_BEGIN

      Fully qualified name of annotation begin feature.
      See Also:
        Constant Field Values

    - #### FEATURE_FULL_NAME_SOFA

          static final String FEATURE_FULL_NAME_SOFA

      Fully qualified name of annotation sofa feature.
      See Also:
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    - #### FEATURE_FULL_NAME_END

          static final String FEATURE_FULL_NAME_END

      Fully qualified name of annotation end feature.
      See Also:
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    - #### FEATURE_FULL_NAME_LANGUAGE

          static final String FEATURE_FULL_NAME_LANGUAGE

      Fully qualified name of document language feature.
      See Also:
        Constant Field Values

    - #### STD_ANNOTATION_INDEX

          static final String STD_ANNOTATION_INDEX

      Name of the built-in index on annotations.
      See Also:
        Constant Field Values

    - #### DEFAULT_LANGUAGE_NAME

          static final String DEFAULT_LANGUAGE_NAME

      See Also:
        Constant Field Values

  - ### Method Detail

    - #### createFS

          <T extends FeatureStructure> T createFS(Type type)
                                           throws CASRuntimeException

      Create a new FeatureStructure.
      Type Parameters:
        `T` - the Java cover class for the FS being created
      Parameters:
        `type` - The type of the FS.
      Returns:
        The new FS.
      Throws:
        `CASRuntimeException`

    - #### createArrayFS

          ArrayFS createArrayFS(int length)
                         throws CASRuntimeException

      Create a new feature structure array.
      Parameters:
        `length` - The length of the array.
      Returns:
        The new array.
      Throws:
        `CASRuntimeException`

    - #### createIntArrayFS

          IntArrayFS createIntArrayFS(int length)
                               throws CASRuntimeException

      Create a new int array.
      Parameters:
        `length` - The length of the array.
      Returns:
        The new array.
      Throws:
        `CASRuntimeException`

    - #### createFloatArrayFS

          FloatArrayFS createFloatArrayFS(int length)
                                   throws CASRuntimeException

      Create a new int array.
      Parameters:
        `length` - The length of the array.
      Returns:
        The new array.
      Throws:
        `CASRuntimeException`

    - #### createStringArrayFS

          StringArrayFS createStringArrayFS(int length)
                                     throws CASRuntimeException

      Create a new String array.
      Parameters:
        `length` - The length of the array.
      Returns:
        The new array.
      Throws:
        `CASRuntimeException`

    - #### createByteArrayFS

          ByteArrayFS createByteArrayFS(int length)
                                 throws CASRuntimeException

      Create a new Byte array.
      Parameters:
        `length` - The length of the array.
      Returns:
        The new array.
      Throws:
        `CASRuntimeException`

    - #### createBooleanArrayFS

          BooleanArrayFS createBooleanArrayFS(int length)
                                       throws CASRuntimeException

      Create a new Boolean array.
      Parameters:
        `length` - The length of the array.
      Returns:
        The new array.
      Throws:
        `CASRuntimeException`

    - #### createShortArrayFS

          ShortArrayFS createShortArrayFS(int length)
                                   throws CASRuntimeException

      Create a new Short array.
      Parameters:
        `length` - The length of the array.
      Returns:
        The new array.
      Throws:
        `CASRuntimeException`

    - #### createLongArrayFS

          LongArrayFS createLongArrayFS(int length)
                                 throws CASRuntimeException

      Create a new Long array.
      Parameters:
        `length` - The length of the array.
      Returns:
        The new array.
      Throws:
        `CASRuntimeException`

    - #### createDoubleArrayFS

          DoubleArrayFS createDoubleArrayFS(int length)
                                     throws CASRuntimeException

      Create a new Double array.
      Parameters:
        `length` - The length of the array.
      Returns:
        The new array.
      Throws:
        `CASRuntimeException`

    - #### getJCas

          JCas getJCas()
                throws CASException

      Get the JCas for this CAS.
      Returns:
        The JCas for this CAS.
      Throws:
        `CASException` - -

    - #### getCurrentView

          CAS getCurrentView()

      Get the Cas view that the current component should use. This should only be used by single-view components.
      Returns:
        the Cas view specified for the current component by Sofa mapping. Defaults to _InitialView if there is no Sofa mapping.

    - #### getSofa

          @Deprecated
          SofaFS getSofa(SofaID sofaID)

      Deprecated. As of v2.0, use {#getView(String)}. From the view you can access the Sofa data, or call `getSofa()` if you truly need to access the SofaFS object.
      Get sofaFS for given Subject of Analysis ID.
      Parameters:
        `sofaID` - -
      Returns:
        The sofaFS.

    - #### getSofa

          SofaFS getSofa()

      Get the Sofa feature structure associated with this CAS view.
      Returns:
        The SofaFS associated with this CAS view.

    - #### createView

          CAS createView(String localViewName)

      Create a view and its underlying Sofa (subject of analysis). The view provides access to the Sofa data and the index repository that contains metadata (annotations and other feature structures) pertaining to that Sofa.

      This method creates the underlying Sofa feature structure, but does not set the Sofa data. Setting ths Sofa data must be done by calling `setSofaDataArray(FeatureStructure, String)`, `setSofaDataString(String, String)` or `setSofaDataURI(String, String)` on the CAS view returned by this method.

      Parameters:
        `localViewName` - the local name, before any sofa name mapping is done, for this view (note: this is the same as the associated Sofa name).
      Returns:
        The view corresponding to this local name.
      Throws:
        `CASRuntimeException` - if a View with this name already exists in this CAS

    - #### getJCas

          JCas getJCas(SofaFS aSofa)
                throws CASException

      Create a JCas view for a Sofa. Note: as of UIMA v2.0, can be replaced with getView(sofaFS).getJCas().
      Parameters:
        `aSofa` - a Sofa feature structure in this CAS.
      Returns:
        The JCas view for the given Sofa.
      Throws:
        `CASException` - -

    - #### getJCas

          @Deprecated
          JCas getJCas(SofaID aSofaID)
                             throws CASException

      Deprecated. As of v2.0, use `getView(String)` followed by `getJCas()`.
      Create a JCas view for a Sofa. Note: this is provided for convenience. It is equivalent to `getView(aSofaID).getJCas()`.
      Parameters:
        `aSofaID` - the ID of a Sofa defined in this CAS
      Returns:
        The view for the Sofa with ID `aSofaID`.
      Throws:
        `CASException` - if no Sofa with the given ID exists in this CAS

    - #### getView

          CAS getView(String localViewName)

      Get the view for a Sofa (subject of analysis). The view provides access to the Sofa data and the index repository that contains metadata (annotations and other feature structures) pertaining to that Sofa.
      Parameters:
        `localViewName` - the local name, before any sofa name mapping is done, for this view (note: this is the same as the associated Sofa name).
      Returns:
        The view corresponding to this local name.
      Throws:
        `CASRuntimeException` - if no View with this name exists in this CAS

    - #### getView

          CAS getView(SofaFS aSofa)

      Get the view for a Sofa (subject of analysis). The view provides access to the Sofa data and the index repository that contains metadata (annotations and other feature structures) pertaining to that Sofa.
      Parameters:
        `aSofa` - a Sofa feature structure in the CAS
      Returns:
        The view for the given Sofa

    - #### getLowLevelCAS

          org.apache.uima.cas.impl.LowLevelCAS getLowLevelCAS()

      Get an instance of the low-level CAS. Low-level and regular CAS can be used in parallel, all data is always contained in both.

      Note: This is for internal use.

      Returns:
        A low-level CAS.
      See Also:
        `LowLevelCAS`

    - #### getAnnotationType

          Type getAnnotationType()

      Get the type object for the annotation type.
      Returns:
        The annotation type.

    - #### getBeginFeature

          Feature getBeginFeature()

      Get the feature object for the annotation begin feature.
      Returns:
        The annotation begin feature.

    - #### getEndFeature

          Feature getEndFeature()

      Get the feature object for the annotation end feature.
      Returns:
        The annotation end feature.

    - #### getAnnotationIndex

          <T extends AnnotationFS> AnnotationIndex<T> getAnnotationIndex()

      Get the standard annotation index.
      Type Parameters:
        `T` - either Annotation (if JCas is in use) or AnnotationImpl
      Returns:
        The standard annotation index.

    - #### getAnnotationIndex

          <T extends AnnotationFS> AnnotationIndex<T> getAnnotationIndex(Type type)
                                                                  throws CASRuntimeException

      Get the standard annotation index restricted to a specific annotation type.
      Type Parameters:
        `T` - the topmost Java class corresponding to the type
      Parameters:
        `type` - The annotation type the index is restricted to.
      Returns:
        The standard annotation index, restricted to `type`.
      Throws:
        `CASRuntimeException` - When `type` is not an annotation type.

    - #### createAnnotation

          <T extends AnnotationFS> AnnotationFS createAnnotation(Type type,
                                                                 int begin,
                                                                 int end)

      Create a new annotation. Note that you still need to insert the annotation into the index repository yourself.
      Type Parameters:
        `T` - the Java class corresponding to the type
      Parameters:
        `type` - The type of the annotation.
        `begin` - The start of the annotation.
        `end` - The end of the annotation.
      Returns:
        A new annotation object.

    - #### getDocumentAnnotation

          <T extends AnnotationFS> T getDocumentAnnotation()

      Get the Document Annotation. The Document Annotation has a string-valued feature called "language" where the document language is specified.
      Type Parameters:
        `T` - the Java class for the document annotation. Could be the JCas cover class or FeatureStructure
      Returns:
        The document annotation, or `null` if there is none. The return value is the JCas cover class or the plain Java cover class for FeatureStructures if JCas is not in use.

    - #### setCurrentComponentInfo

          void setCurrentComponentInfo(ComponentInfo info)

      Informs the CAS of relevant information about the component that is currently processing it. This is called by the framework automatically; users do not need to call it.
      Parameters:
        `info` - information about the component that is currently processing this CAS.

    - #### getTypeSystem

          TypeSystem getTypeSystem()
                            throws CASRuntimeException

      Return the type system of this CAS instance.
      Returns:
        The type system, or `null` if none is available.
      Throws:
        `CASRuntimeException` - If the type system has not been committed.

    - #### createSofa

          @Deprecated
          SofaFS createSofa(SofaID sofaID,
                                         String mimeType)

      Deprecated. As of v2.0, use `createView(String)` instead.
      Create a Subject of Analysis. The new sofaFS is automatically added to the SofaIndex.
      Parameters:
        `sofaID` - -
        `mimeType` - -
      Returns:
        The sofaFS.

    - #### getSofaIterator

          FSIterator<SofaFS> getSofaIterator()

      Get iterator for all SofaFS in the CAS.
      Returns:
        an iterator over SofaFS.

    - #### createFilteredIterator

          <T extends FeatureStructure> FSIterator<T> createFilteredIterator(FSIterator<T> it,
                                                                            FSMatchConstraint cons)

      Create an iterator over structures satisfying a given constraint. Constraints are described in the javadocs for `ConstraintFactory` and related classes.
      Type Parameters:
        `T` - - the type of the Feature Structure
      Parameters:
        `it` - The input iterator.
        `cons` - The constraint specifying what structures should be returned.
      Returns:
        An iterator over FSs.

    - #### getConstraintFactory

          ConstraintFactory getConstraintFactory()

      Get a constraint factory. A constraint factory is a simple way of creating `FSMatchConstraints`.
      Returns:
        A constraint factory to create new FS constraints.

    - #### createFeaturePath

          FeaturePath createFeaturePath()

      Create a feature path. This is mainly useful for creating `FSMatchConstraints`.
      Returns:
        A new, empty feature path.

    - #### getIndexRepository

          FSIndexRepository getIndexRepository()

      Get the index repository.
      Returns:
        The index repository, or `null` if none is available.

    - #### fs2listIterator

          <T extends FeatureStructure> ListIterator<T> fs2listIterator(FSIterator<T> it)

      Wrap a standard Java `ListIterator` around an FSListIterator. Use if you feel more comfortable with java style iterators.
      Type Parameters:
        `T` - The type of FeatureStructure
      Parameters:
        `it` - The `FSListIterator` to be wrapped.
      Returns:
        An equivalent `ListIterator`.

    - #### reset

          void reset()
              throws CASAdminException

      Reset the CAS, emptying it of all content. Feature structures and iterators will no longer be valid. Note: this method may only be called from an application. Calling it from an annotator will trigger a runtime exception.
      Throws:
        `CASRuntimeException` - When called out of sequence.
        `CASAdminException`
      See Also:
        `CASMgr`

    - #### getViewName

          String getViewName()

      Get the view name. The view name is the same as the name of the view's Sofa, retrieved by getSofa().getSofaID(), except for the initial View before its Sofa has been created.
      Returns:
        The name of the view

    - #### size

          int size()

      Estimate the memory consumption of this CAS instance (in bytes).
      Returns:
        The estimated memory used by this CAS instance.

    - #### createFeatureValuePath

          FeatureValuePath createFeatureValuePath(String featureValuePath)
                                           throws CASRuntimeException

      Create a feature-value path from a string.
      Parameters:
        `featureValuePath` - String representation of the feature-value path.
      Returns:
        Feature-value path object.
      Throws:
        `CASRuntimeException` - If the input string is not well-formed.

    - #### setDocumentText

          void setDocumentText(String text)
                        throws CASRuntimeException

      Set the document text. Once set, Sofa data is immutable, and cannot be set again until the CAS has been reset.
      Parameters:
        `text` - The text to be analyzed.
      Throws:
        `CASRuntimeException` - If the Sofa data has already been set.

    - #### setSofaDataString

          void setSofaDataString(String text,
                                 String mimetype)
                          throws CASRuntimeException

      Set the document text. Once set, Sofa data is immutable, and cannot be set again until the CAS has been reset.
      Parameters:
        `text` - The text to be analyzed.
        `mimetype` - The mime type of the data
      Throws:
        `CASRuntimeException` - If the Sofa data has already been set.

    - #### getDocumentText

          String getDocumentText()

      Get the document text.
      Returns:
        The text being analyzed, or `null` if not set.

    - #### getSofaDataString

          String getSofaDataString()

      Get the Sofa Data String (a.k.a. the document text).
      Returns:
        The Sofa data string, or `null` if not set.

    - #### setDocumentLanguage

          void setDocumentLanguage(String languageCode)
                            throws CASRuntimeException

      Sets the language for this document. This value sets the language feature of the special instance of DocumentAnnotation associated with this CAS.
      Parameters:
        `languageCode` - -
      Throws:
        `CASRuntimeException` - passthru

    - #### getDocumentLanguage

          String getDocumentLanguage()

      Gets the language code for this document from the language feature of the special instance of the DocumentationAnnotation associated with this CAS.
      Returns:
        language identifier

    - #### setSofaDataArray

          void setSofaDataArray(FeatureStructure array,
                                String mime)
                         throws CASRuntimeException

      Set the Sofa data as an ArrayFS. Once set, Sofa data is immutable, and cannot be set again until the CAS has been reset.
      Parameters:
        `array` - The ArrayFS to be analyzed.
        `mime` - The mime type of the data
      Throws:
        `CASRuntimeException` - If the Sofa data has already been set.

    - #### getSofaDataArray

          FeatureStructure getSofaDataArray()

      Get the Sofa data array.
      Returns:
        The Sofa Data being analyzed, or `null` if not set.

    - #### setSofaDataURI

          void setSofaDataURI(String uri,
                              String mime)
                       throws CASRuntimeException

      Set the Sofa data as a URI. Once set, Sofa data is immutable, and cannot be set again until the CAS has been reset.
      Parameters:
        `uri` - The URI of the data to be analyzed.
        `mime` - The mime type of the data
      Throws:
        `CASRuntimeException` - If the Sofa data has already been set.

    - #### getSofaDataURI

          String getSofaDataURI()

      Get the Sofa data array.
      Returns:
        The Sofa URI being analyzed, or `null` if not set.

    - #### getSofaDataStream

          InputStream getSofaDataStream()

      Get the Sofa data as a byte stream.
      Returns:
        A stream handle to the Sofa Data, or `null` if not set.

    - #### getSofaMimeType

          String getSofaMimeType()

      Get the mime type of the Sofa data being analyzed.
      Returns:
        the mime type of the Sofa

    - #### addFsToIndexes

          void addFsToIndexes(FeatureStructure fs)

      Add a feature structure to all appropriate indexes in the repository associated with this CAS View. If no indexes exist for the type of FS that you are adding, then a bag (unsorted) index will be automatically created.

      Important: after you have called `addFsToIndexes(...)` on a FS, do not change the values of any features used for indexing. If you do, the index will become corrupted and may be unusable. If you need to change an index feature value, first call `removeFsFromIndexes(...)` on the FS, change the feature values, then call `addFsToIndexes(...)` again.

      Parameters:
        `fs` - The Feature Structure to be added.
      Throws:
        `NullPointerException` - If the `fs` parameter is `null`.

    - #### removeFsFromIndexes

          void removeFsFromIndexes(FeatureStructure fs)

      Remove a feature structure from all indexes in the repository associated with this CAS View. The remove operation removes the exact fs from the indexes, unlike operations such as moveTo which use the fs argument as a template. It is not an error if the FS is not present in the indexes.
      Parameters:
        `fs` - The Feature Structure to be removed.
      Throws:
        `NullPointerException` - If the `fs` parameter is `null`.

    - #### getViewIterator

          Iterator<CAS> getViewIterator()

      Get iterator over all views in this CAS. Each view provides access to Sofa data and the index repository that contains metadata (annotations and other feature structures) pertaining to that Sofa.
      Returns:
        an iterator which returns all views. Each object returned by the iterator is of type CAS.

    - #### getViewIterator

          Iterator<CAS> getViewIterator(String localViewNamePrefix)

      Get iterator over all views with the given name prefix. Each view provides access to Sofa data and the index repository that contains metadata (annotations and other feature structures) pertaining to that Sofa.

      When passed the prefix namePrefix, the iterator will return all views who name is either exactly equal to namePrefix or is of the form namePrefix`.`suffix, where suffix can be any String.

      Parameters:
        `localViewNamePrefix` - the local name prefix, before any sofa name mapping is done, for this view (note: this is the same as the associated Sofa name prefix).
      Returns:
        an iterator which returns all views with the given name prefix. Each object returned by the iterator is of type CAS.

    - #### createMarker

          Marker createMarker()

      Sets a mark and returns the marker object set with the current mark which can be used to query when certain FSs were created. This can then be used to identify FSs as added before or after the mark was set and to identify FSs modified after the mark is set. Note: this method may only be called from an application. Calling it from an annotator will trigger a runtime exception.
      Returns:
        a marker object.

    - #### protectIndexes

          AutoCloseable protectIndexes()

      Call this method to set up a region, ended by a `AutoCloseable.close()` call on the returned object, You can use this or the `protectIndexes(Runnable)` method to protected the indexes.

      This approach allows arbitrary code between the protectIndexes and the associated close method.

      The close method is best done in a finally block, or using the try-with-resources statement in Java 8.

      Returns:
        an object used to record things that need adding back

    - #### protectIndexes

          void protectIndexes(Runnable runnable)

      Runs the code in the runnable inside a protection block, where any modifications to features done while in this block will be done in a way to protect any indexes which otherwise might become corrupted by the update action; the protection is achieved by temporarily removing the FS (if it is in the indexes), before the update happens. At the end of the block, affected indexes have any removed-under-the-covers FSs added back.
      Parameters:
        `runnable` - code to execute while protecting the indexes.

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