SceneInterfacePtr LinkedScene::scene( const Path &path, MissingBehaviour missingBehaviour )
{
if ( missingBehaviour == SceneInterface::CreateIfMissing )
{
throw Exception( "createIfMissing is not supported!" );
}
SceneInterfacePtr s = m_mainScene->scene( SceneInterface::rootPath );
Path::const_iterator pIt;
/// first try to get as close as possible using the m_mainScene...
for ( pIt = path.begin(); pIt != path.end(); pIt++ )
{
SceneInterfacePtr n = s->child( *pIt, SceneInterface::NullIfMissing );
if ( !n )
{
break;
}
s = n;
}
ConstSceneInterfacePtr l = 0;
int linkDepth = 0;
bool atLink = false;
bool timeRemapped = false;
if ( s->hasAttribute( fileNameLinkAttribute ) && s->hasAttribute( rootLinkAttribute ) )
{
atLink = true;
timeRemapped = s->hasAttribute( timeLinkAttribute );
ConstStringDataPtr fileName = runTimeCast< const StringData >( s->readAttribute( fileNameLinkAttribute, 0 ) );
ConstInternedStringVectorDataPtr root = runTimeCast< const InternedStringVectorData >( s->readAttribute( rootLinkAttribute, 0 ) );
l = expandLink( fileName.get(), root.get(), linkDepth );
if (!l)
{
atLink = false;
timeRemapped = false;
}
}
else if( s->hasAttribute( linkAttribute ) )
{
atLink = true;
ConstCompoundDataPtr d = runTimeCast< const CompoundData >( s->readAttribute( linkAttribute, 0 ) );
l = expandLink( d->member< const StringData >( g_fileName ), d->member< const InternedStringVectorData >( g_root ), linkDepth );
if ( !l )
{
atLink = false;
}
}
if ( pIt != path.end() )
{
if ( !atLink )
{
if ( missingBehaviour == SceneInterface::NullIfMissing )
{
return 0;
}
throw Exception( "Could not find child '" + pIt->value() + "'" );
}
for ( ; pIt != path.end(); pIt++ )
{
l = l->child( *pIt, missingBehaviour );
if ( !l )
{
return 0;
}
}
atLink = false;
}
return new LinkedScene( s, l, linkDepth, m_readOnly, atLink, timeRemapped );
}
SceneInterfacePtr LinkedScene::child( const Name &name, MissingBehaviour missingBehaviour )
{
if ( missingBehaviour == SceneInterface::CreateIfMissing )
{
if ( m_readOnly )
{
throw Exception( "No write access to scene file!" );
}
if ( m_atLink )
{
throw Exception( "Locations with links to external scene cannot have child locations themselves!" );
}
}
if ( m_linkedScene )
{
ConstSceneInterfacePtr c = m_linkedScene->child( name, missingBehaviour );
if ( !c )
{
return 0;
}
return new LinkedScene( m_mainScene.get(), c.get(), m_rootLinkDepth, m_readOnly, false, m_timeRemapped );
}
else
{
SceneInterfacePtr c = m_mainScene->child( name, missingBehaviour );
if ( !c )
{
return 0;
}
if ( m_readOnly )
{
if( c->hasAttribute( fileNameLinkAttribute ) && c->hasAttribute( rootLinkAttribute ) )
{
ConstStringDataPtr fileName = runTimeCast< const StringData >( c->readAttribute( fileNameLinkAttribute, 0 ) );
ConstInternedStringVectorDataPtr root = runTimeCast< const InternedStringVectorData >( c->readAttribute( rootLinkAttribute, 0 ) );
/// we found the link attribute...
int linkDepth;
bool timeRemapped = c->hasAttribute( timeLinkAttribute );
ConstSceneInterfacePtr l = expandLink( fileName.get(), root.get(), linkDepth );
if ( l )
{
return new LinkedScene( c.get(), l.get(), linkDepth, m_readOnly, true, timeRemapped );
}
}
else if( c->hasAttribute( linkAttribute ) )
{
// read from old school link attribute.
// \todo: remove this when it doesn't break everyone's stuff!
ConstCompoundDataPtr d = runTimeCast< const CompoundData >( c->readAttribute( linkAttribute, 0 ) );
/// we found the link attribute...
int linkDepth;
bool timeRemapped = false;
ConstSceneInterfacePtr l = expandLink( d->member< const StringData >( g_fileName ), d->member< const InternedStringVectorData >( g_root ), linkDepth );
if ( l )
{
return new LinkedScene( c.get(), l.get(), linkDepth, m_readOnly, true, timeRemapped );
}
}
}
return new LinkedScene( c.get(), 0, 0, m_readOnly, false, false );
}
}