Package org.apache.uima.cas.impl

Class Serialization

java.lang.Object
org.apache.uima.cas.impl.Serialization
public class Serialization extends Object
This class has no fields or instance methods, but instead has only static methods. In spite of its name, it has static methods for both serializing and deserializing CASes. It has 2 styles of Serialization / Deserialization - one which makes use of various custom binary serialization methods, and - one which just converts CAS and related objects into other objects which in turn are serializable by normal Java Object serialization. See also CasIOUtils, which has static methods for serialization and deserialization, including support for XMI and XCAS.

  • Constructor Details

    • Serialization

      public Serialization()

  • Method Details

    • serializeCAS

      public static CASSerializer serializeCAS(CAS cas)
      Convert a CAS to a CASSerializer object. This object used in testing , and also to pass things via the CPP JNI interface, and the Vinci protocol
      Parameters:
      cas - the CAS which serves as the source for a new CASSerializer object
      Returns:
      a corresponding CASSerializer object

    • serializeNoMetaData

      public static CASSerializer serializeNoMetaData(CAS cas)
      Convert a CAS to a CASSerializer object. This object used in testing. Excludes metadata about the CAS.
      Parameters:
      cas - the source for a new CASSerializer object
      Returns:
      a corresponding CASSerializer object

    • serializeCASMgr

      public static CASMgrSerializer serializeCASMgr(CASMgr casMgr)
      Convert a Type System and Index Repository into a CASMgrSerializer object which can be serialized
      Parameters:
      casMgr - the type system and index repo definitions
      Returns:
      a serializable object version of these

    • serializeCASMgrTypeSystemOnly

      public static CASMgrSerializer serializeCASMgrTypeSystemOnly(CASMgr casMgr)
      Convert a Type System into a CASMgrSerializer object which can be serialized
      Parameters:
      casMgr - the type system and index repo definitions
      Returns:
      a serializable object version of these

    • serializeCASComplete

      public static CASCompleteSerializer serializeCASComplete(CASMgr casMgr)
      Convert a CAS + the type system and index definitions into a CASCompleteSerializer object
      Parameters:
      casMgr - the source for a new CASCompleteSerializer object
      Returns:
      a Java Object which is serializable and has both the type system, index definitions, and the CAS contents

    • deserializeCASComplete

      public static void deserializeCASComplete(CASCompleteSerializer casCompSer, CASMgr casMgr)
      Deserialize the data in a CASCompleteSerializer into an existing CAS
      Parameters:
      casCompSer - the source for deserialization
      casMgr - the CAS to receive the data

    • createCASMgr

      public static CASMgr createCASMgr(CASMgrSerializer ser)
      Deserialize a type system and index repository definition and use to initialize a new instance of a CAS.
      Parameters:
      ser - the CAS to receive the type system
      Returns:
      the initialized CAS loaded with the deserialized info about the CAS Type systen and Index repositories

    • createCAS

      public static CAS createCAS(CASMgr casMgr, CASSerializer casSer)
      Deserialize the data in a CASSerializer into an existing CAS, return the currentview in that Cas.
      Parameters:
      casMgr - the CAS Manager
      casSer - the serializer
      Returns:
      the initialized CAS loaded with the deserialized data

    • serializeCAS

      public static void serializeCAS(CAS cas, OutputStream ostream)
      Serialize a CAS including what's indexed, to an output stream Uses uncompressed binary serialization
      Parameters:
      cas - the CAS to serialize
      ostream - the output stream

    • deserializeCAS

      public static SerialFormat deserializeCAS(CAS cas, InputStream istream)
      Deserialize a CAS, in various binary formats, into an existing CAS Note: this form supports deserializing the following binary representations: - plain (uncompressed) - compressed, no type filtering (form 4), Delta and not-delta - compressed, no type filtering (form 6), not-delta only. If this form encounters a non-conforming kind of input, it will throw a runtime exception.
      Parameters:
      cas - the CAS to deserialize into. If the incoming representation is a Delta Cas, then the receiving CAS is not reset, but is added to.
      istream - the input stream
      Returns:
      The form of the serialized CAS (from its header)

    • serializeCAS

      public static void serializeCAS(CAS cas, OutputStream ostream, Marker mark)
      Serializes CAS data added or modified after the tracking Marker was created and writes it to the output stream in Delta CAS format using uncompressed binary format
      Parameters:
      cas - the Cas to serialize
      ostream - the output stream
      mark - the cas mark (for delta CASes)

    • serializeWithCompression

      public static void serializeWithCompression(CAS cas, Object out) throws IOException
      Serialize in compressed binary form 4
      Parameters:
      cas - the CAS to serialize
      out - - an OutputStream, a DataOutputStream, or a File
      Throws:
      IOException - if IO exception

    • serializeWithCompression

      public static void serializeWithCompression(CAS cas, Object out, Marker marker) throws IOException
      Serialize in compress binary form 4, only the delta part of a CAS
      Parameters:
      cas - the CAS to serialize
      out - - an OutputStream, a DataOutputStream, or a File
      marker - identifying where the delta starts
      Throws:
      IOException - if IO exception

    • serializeWithCompression

      public static BinaryCasSerDes6.ReuseInfo serializeWithCompression(CAS cas, Object out, boolean includeTS, boolean includeTSI) throws IOException, ResourceInitializationException
      Serialize in compressed binary with type filtering This method can use type filtering to omit sending those types and/or features not present in the target type system. - To omit type filtering, use null for the target type system It also only sends those feature structures which are reachable either from an index or references from other reachable feature structures.
      Parameters:
      cas - the CAS to serialize
      out - an OutputStream, a DataOutputStream, or a File
      includeTS - true to serialize the type system
      includeTSI - true to serialize the type system and the indexes definition
      Returns:
      information to be used on subsequent serializations (to save time) or deserializations (for receiving delta CASs), or reserializations (if sending delta CASs)
      Throws:
      IOException - if IO exception
      ResourceInitializationException - if target type system is incompatible with this CAS's type system

    • serializeWithCompression

      public static BinaryCasSerDes6.ReuseInfo serializeWithCompression(CAS cas, Object out, TypeSystem tgtTypeSystem) throws IOException, ResourceInitializationException
      Serialize in compressed binary with type filtering This method can use type filtering to omit sending those types and/or features not present in the target type system. - To omit type filtering, use null for the target type system It also only sends those feature structures which are reachable either from an index or references from other reachable feature structures.
      Parameters:
      cas - the CAS to serialize
      out - an OutputStream, a DataOutputStream, or a File
      tgtTypeSystem - null or a target TypeSystem, which must be mergable with this CAS's type system
      Returns:
      information to be used on subsequent serializations (to save time) or deserializations (for receiving delta CASs), or reserializations (if sending delta CASs)
      Throws:
      IOException - if IO exception
      ResourceInitializationException - if target type system is incompatible with this CAS's type system

    • serializeWithCompression

      public static void serializeWithCompression(CAS cas, Object out, TypeSystem tgtTypeSystem, Marker mark, BinaryCasSerDes6.ReuseInfo reuseInfo) throws IOException, ResourceInitializationException
      Delta Serialize in compressed form, with type filtering This method can use type filtering to omit sending those types and/or features not present in the target type system. - To omit type filtering, use null for the target type system It also only sends those feature structures which are reachable either from an index or references from other reachable feature structures.
      Parameters:
      cas - the CAS to serialize
      out - an OutputStream, a DataOutputStream, or a File
      tgtTypeSystem - null or a target TypeSystem, which must be mergable with this CAS's type system
      mark - null or where the mark is in the CAS. If not null, indicates doing a delta CAS serialization
      reuseInfo - if mark is not null, this parameter is required and must have been computed when the original deserialization (of the CAS now being serialized as a delta CAS) was done
      Throws:
      IOException - if IO exception
      ResourceInitializationException - if the target type system and the CAS's type system can't be merged

    • deserializeCAS

      public static BinaryCasSerDes6 deserializeCAS(CAS cas, InputStream istream, TypeSystem tgtTypeSystem, BinaryCasSerDes6.ReuseInfo reuseInfo) throws IOException, ResourceInitializationException
      Deserialize a CAS, in various binary formats, into an existing CAS Note: this form supports deserializing the following binary representations: - compressed, type filtering (form 6), delta and not-delta.
      Parameters:
      cas - the CAS to deserialize into. If the incoming representation is a Delta Cas, then the receiving CAS is not reset, but is added to.
      istream - the input stream
      tgtTypeSystem - The typeSystem of the serialized form of the CAS; must be compatible with the type system of the receiving cas.
      reuseInfo - If delta CAS is being received and form 6 compression is being used, then this must be the reuseInfo captured when the original CAS (being updated by the delta coming in) was sent out.
      Returns:
      The instance of BinaryCasSerDes6 used for deserialization
      Throws:
      IOException - if IO exception
      ResourceInitializationException - if the target type system and the CAS's type system can't be merged

    • deserializeCAS

      public static BinaryCasSerDes6 deserializeCAS(CAS cas, InputStream istream, TypeSystem tgtTypeSystem, BinaryCasSerDes6.ReuseInfo reuseInfo, AllowPreexistingFS allowPreexisting) throws IOException, ResourceInitializationException
      Deserialize a CAS, in various binary formats, into an existing CAS Note: this form supports deserializing the following binary representations: - compressed, type filtering (form 6), delta and not-delta.
      Parameters:
      cas - the CAS to deserialize into. If the incoming representation is a Delta Cas, then the receiving CAS is not reset, but is added to.
      istream - the input stream
      tgtTypeSystem - The typeSystem of the serialized form of the CAS; must be compatible with the type system of the receiving cas.
      reuseInfo - If delta CAS is being received and form 6 compression is being used, then this must be the reuseInfo captured when the original CAS (being updated by the delta coming in) was sent out.
      allowPreexisting - used to control what happens when a delta cas is modifying Feature Structures below the line
      Returns:
      The instance of BinaryCasSerDes6 used for deserialization
      Throws:
      IOException - if IO exception
      ResourceInitializationException - if the target type system and the CAS's type system can't be merged