Oracle Coherence for C++ API
Release 3.6.1.0

E18813-01

UserTypeReader Class Reference

#include <coherence/io/pof/UserTypeReader.hpp>

Inherits PofBufferReader.

List of all members.


Detailed Description

The UserTypeReader implementation is a contextually-aware PofReader whose purpose is to advance through the properties of a value of a specified user type.

The "contextual awareness" refers to the fact that the UserTypeReader maintains state about the type identifier and version of the user type, the parser's property index position within the user type value, and a PofContext that may differ from the PofContext that provided the PofSerializer which is using this UserTypeReader to parse a user type.

Author:
jh 2008.04.11

Public Types

typedef spec::Handle  Handle
  UserTypeReader Handle definition.
typedef spec::View  View
  UserTypeReader View definition.
typedef spec::Holder  Holder
  UserTypeReader Holder definition.

Public Member Functions

  UserTypeReader (ReadBuffer::BufferInput::Handle hIn, PofContext::View vCtx, int32_t nTypeId, int32_t nVersionId)
  Construct a parser for parsing the property values of a user type.
  UserTypeReader (PofBufferReader::Handle hParent, ReadBuffer::BufferInput::Handle hIn, PofContext::View vCtx, int32_t nTypeId, int32_t nVersionId)
  Construct a parser for parsing the property values of a user type.
virtual int32_t  getUserTypeId () const
  Determine the user type that is currently being parsed.
Returns:
the user type information, or -1 if the PofReader is not currently parsing a user type

virtual int32_t  getVersionId () const
  Determine the version identifier of the user type that is currently being parsed.
Returns:
the integer version ID read from the POF stream; always non-negative
Exceptions:
coherence::lang::IllegalStateException  if no user type is being parsed

virtual PofReader::Handle  createNestedPofReader (int32_t iProp)
  Obtain a PofReader that can be used to read a set of properties from a single property of the current user type.

The returned PofReader is only valid from the time that it is returned until the next call is made to this PofReader.

Parameters:
iProp  the property index to read from
Returns:
a PofReader that reads its contents from a single property of this PofReader
Exceptions:
coherence::lang::IllegalArgumentException  if the property index is invalid, or is less than or equal to the index of the previous property read from the POF stream
coherence::lang::IllegalStateException  if no user type is being parsed
coherence::io::IOException  if an I/O error occurs
Since:
Coherence 3.6

virtual Binary::View  readRemainder ()
  Read all remaining indexed properties of the current user type from the POF stream.

As part of reading in a user type, this method must be called by the PofSerializer that is reading the user type, or the read position within the POF stream will be corrupted.

Subsequent calls to the various readXYZ methods of this interface will fail after this method is called.

Returns:
a buffer containing zero or more indexed properties in binary POF encoded form
Exceptions:
coherence::lang::IllegalStateException  if no user type is being parsed
coherence::io::IOException  if an I/O error occurs


Protected Member Functions

virtual bool  advanceTo (int32_t iProp)
  Advance through the POF stream until the specified property is found.

If the property is found, return true, otherwise return false and advance to the first property that follows the specified property.

Parameters:
iProp  the index of the property to advance to
Returns:
true if the property is found
Exceptions:
IllegalStateException  if the POF stream has already advanced past the desired property
IOException  if an I/O error occurs

virtual void  complete (int32_t iProp)
  Register the completion of the parsing of a value.
Parameters:
iProp  the property index
Exceptions:
IOException  if an I/O error occurs

virtual void  closeNested ()
  Notify the UserTypeReader that it is being "closed".
virtual
PofBufferReader::Handle 
getParentParser ()
  If this parser is contextually within a user type, obtain the parser which created this parser in order to parse the user type.
Returns:
the parser for the context within which this parser is operating

virtual
PofBufferReader::View 
getParentParser () const
  If this parser is contextually within a user type, obtain the parser which created this parser in order to parse the user type.
Returns:
the parser for the context within which this parser is operating


Protected Attributes

MemberHandle
< PofBufferReader
m_hParent
  The parent (ie containing) PofBufferReader.
int32_t  m_nTypeId
  The type identifier of the user type that is being parsed.
int32_t  m_nVersionId
  The version identifier of the user type that is being parsed.
int32_t  m_iPrevProp
  Most recent property read or (if it were missing) requested.
int32_t  m_iNextProp
  The index of the next property in the POF stream.
size32_t  m_ofNextProp
  The offset of the index of the next property to read.
MemberHandle
< UserTypeReader
m_hReaderNested
  The currently open nested reader, if any.
int32_t  m_iNestedProp
  The property index of the property from which the currently open nested reader is reading from.

Constructor & Destructor Documentation

UserTypeReader ( ReadBuffer::BufferInput::Handle  hIn,
PofContext::View  vCtx,
int32_t  nTypeId,
int32_t  nVersionId  
)

Construct a parser for parsing the property values of a user type.

Parameters:
hIn  the BufferInput that contains the user type data, except for the user type id itself (which is passed passed as a constructor argument)
vCtx  the PofContext to use for parsing the user type property values within the user type that this parser will be parsing
nTypeId  the type id of the user type
nVersionId  the version id of the user type
Exceptions:
IOException  if an I/O error occurs

UserTypeReader ( PofBufferReader::Handle  hParent,
ReadBuffer::BufferInput::Handle  hIn,
PofContext::View  vCtx,
int32_t  nTypeId,
int32_t  nVersionId  
)

Construct a parser for parsing the property values of a user type.

Parameters:
hParent  the parent (ie the containing) PofBufferReader
hIn  the BufferInput that contains the user type data, except for the user type id itself (which is passed passed as a constructor argument)
vCtx  the PofContext to use for parsing the user type property values within the user type that this parser will be parsing
nTypeId  the type id of the user type
nVersionId  the version id of the user type
Exceptions:
IOException  if an I/O error occurs

Member Function Documentation

virtual void closeNested (  )  [protected, virtual]

Notify the UserTypeReader that it is being "closed".

Exceptions:
IOException  if an I/O error occurs

Member Data Documentation

int32_t m_iPrevProp [protected]

Most recent property read or (if it were missing) requested.

This is used to determine if the client is attempting to read properties in the wrong order.


The documentation for this class was generated from the following file:
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