ora::ReadBuffer Class Reference

List of all members.

Public Member Functions
void *	read (int oid)
	ReadBuffer (ContainerSchema &contSchema)
const Reflex::Type &	type ()
	~ReadBuffer ()
Private Attributes
std::auto_ptr< IRelationalReader >	m_reader
DataElement	m_topLevelElement
SelectOperation	m_topLevelQuery
const Reflex::Type &	m_type

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Detailed Description

Definition at line 142 of file DatabaseContainer.cc.

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Constructor & Destructor Documentation

ora::ReadBuffer::ReadBuffer

(

ContainerSchema &

contSchema

)

[inline, explicit]

Definition at line 144 of file DatabaseContainer.cc.

References ora::SelectOperation::addWhereId(), ora::MappingElement::columnNames(), ora::MappingElement::end(), ora::MappingElement::find(), m_reader, m_topLevelElement, m_topLevelQuery, m_type, ora::ContainerSchema::mapping(), ora::RelationalStreamerFactory::newReader(), ora::throwException(), and ora::MappingTree::topElement().

                                                        :
        m_topLevelElement(),
        m_type( contSchema.type() ),
        m_reader(),
        m_topLevelQuery( contSchema.mapping().topElement().tableName(), contSchema.storageSchema() ){

        MappingElement& topLevelMapping = contSchema.mapping().topElement();
        m_topLevelQuery.addWhereId(  topLevelMapping.columnNames()[ 0 ] );
        MappingElement::iterator iMap = topLevelMapping.find( m_type.Name(Reflex::SCOPED) );
        // the first inner mapping is the good one ...
        if( iMap == topLevelMapping.end()){
          throwException("Could not find a mapping element for class \""+
                         m_type.Name(Reflex::SCOPED)+"\"",
                         "ReadBuffer::ReadBuffer");
        }
        MappingElement& mapping = iMap->second;
        RelationalStreamerFactory streamerFactory( contSchema );
        m_reader.reset( streamerFactory.newReader( m_type, mapping )) ;
        m_reader->build( m_topLevelElement , m_topLevelQuery );
      }

ora::ReadBuffer::~ReadBuffer

(

)

[inline]

Definition at line 165 of file DatabaseContainer.cc.

                   {
      }

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Member Function Documentation

void* ora::ReadBuffer::read

(

int

oid

)

[inline]

Definition at line 168 of file DatabaseContainer.cc.

References ora::SelectOperation::clear(), ora::ClassUtils::constructObject(), ora::SelectOperation::execute(), m_reader, m_topLevelQuery, m_type, ora::SelectOperation::nextCursorRow(), and ora::SelectOperation::whereData().

                           {
        coral::AttributeList& dataBuff = m_topLevelQuery.whereData();
        dataBuff.begin()->data<int>() = oid;
        m_topLevelQuery.execute();
        m_reader->select( oid );
        void* destination = 0;
        if( m_topLevelQuery.nextCursorRow() ){
          destination = ClassUtils::constructObject( m_type );
          m_reader->read( destination );
        }
        m_reader->clear();
        m_topLevelQuery.clear();
        return destination;
      }

const Reflex::Type& ora::ReadBuffer::type

(

)

[inline]

Definition at line 183 of file DatabaseContainer.cc.

References m_type.

                              {
        return m_type;
      }

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Member Data Documentation

std::auto_ptr<IRelationalReader> ora::ReadBuffer::m_reader [private]

Definition at line 190 of file DatabaseContainer.cc.

Referenced by read(), and ReadBuffer().

DataElement ora::ReadBuffer::m_topLevelElement [private]

Definition at line 188 of file DatabaseContainer.cc.

Referenced by ReadBuffer().

SelectOperation ora::ReadBuffer::m_topLevelQuery [private]

Definition at line 191 of file DatabaseContainer.cc.

Referenced by read(), and ReadBuffer().

const Reflex::Type& ora::ReadBuffer::m_type [private]

Definition at line 189 of file DatabaseContainer.cc.

Referenced by read(), ReadBuffer(), and type().