gavo.stc.stcxgen module

Converting ASTs to/from STC-X.

The basic idea for conversion to STC-X is that for every ASTNode in dm, there is a serialize_<classname> function returning some xmlstan. In general they should handle the case when their argument is None and return None in that case.

Traversal is done manually (i.e., by each serialize_X method) rather than globally since the children in the AST may not have the right order to keep XSD happy, and also since ASTs are actually a bit more complicated than trees (e.g., coordinate frames usually have multiple parents).

class gavo.stc.stcxgen.Context(rootNode)

Bases: object

is a generation context.

It is used to pass around genration-related information. Right now, that’s primarily the root node.

getPosForInterval(node)

gavo.stc.stcxgen.addId(node)

adds a synthetic id attribute to node unless it’s already there.

gavo.stc.stcxgen.astToStan(rootNode, stcRoot)

returns STC stan for the AST rootNode wrapped in the stcRoot element.

The first coordinate system defined in the AST is always used for the embedded coordinates and areas.

gavo.stc.stcxgen.getSTCXProfile(rootNode)

gavo.stc.stcxgen.isoformatOrNull(val)

gavo.stc.stcxgen.makeAreas(rootNode, context)

serializes the areas contained in rootNode.

This requires all kinds of insane special handling.

gavo.stc.stcxgen.nodeToStan(astNode)

returns xmlstan for an AST node.

gavo.stc.stcxgen.serialize_AllSky(node, context)

gavo.stc.stcxgen.serialize_Box(node, context)

gavo.stc.stcxgen.serialize_Circle(node, context)

gavo.stc.stcxgen.serialize_Convex(node, context)

gavo.stc.stcxgen.serialize_CoordSys(node, context)

gavo.stc.stcxgen.serialize_Difference(node, context)

gavo.stc.stcxgen.serialize_Ellipse(node, context)

gavo.stc.stcxgen.serialize_Intersection(node, context)

gavo.stc.stcxgen.serialize_MultiCompound(node, context)

gavo.stc.stcxgen.serialize_Not(node, context)

gavo.stc.stcxgen.serialize_Polygon(node, context)

gavo.stc.stcxgen.serialize_RedshiftCoo(node, context)

gavo.stc.stcxgen.serialize_RedshiftFrame(node, context)

gavo.stc.stcxgen.serialize_RedshiftInterval(node, context)

gavo.stc.stcxgen.serialize_RefPos(node, context)

gavo.stc.stcxgen.serialize_SpaceCoo(node, context)

gavo.stc.stcxgen.serialize_SpaceFrame(node, context)

gavo.stc.stcxgen.serialize_SpaceInterval(node, context)

gavo.stc.stcxgen.serialize_SpectralCoo(node, context)

gavo.stc.stcxgen.serialize_SpectralFrame(node, context)

gavo.stc.stcxgen.serialize_SpectralInterval(node, context)

gavo.stc.stcxgen.serialize_TimeCoo(node, context)

gavo.stc.stcxgen.serialize_TimeFrame(node, context)

gavo.stc.stcxgen.serialize_TimeInterval(node, context)

gavo.stc.stcxgen.serialize_Union(node, context)

gavo.stc.stcxgen.serialize_VelocityCoo(node, context)

gavo.stc.stcxgen.serialize_VelocityInterval(node, context)

gavo.stc.stcxgen.strOrNull(val)