#!/usr/bin/env python
import sys
import gto
print gto.__doc__
# *****************************************************************************
#
# gto.Writer example
#
# create an instance of the gto.Writer class
writer = gto.Writer()
# open a file
writer.open("test.gto")
# Declare the data structures -- see the gto file format spec
writer.beginObject("test", "data", 1)
writer.beginComponent("component_1")
writer.property("property_1", gto.Float, 4, 4)
writer.property("property_2", gto.Int, 5, 2)
writer.property("property_3", gto.String, 1, 4)
writer.endComponent()
writer.endObject()
writer.beginObject("test2", "data", 1)
writer.beginComponent("component_1")
writer.property("property_1", gto.Double, 10)
def write( self, filename = None, compress = True ):
"""
Writes the current contents of this gtoContainer instance to the
given filename. If no filename is given, the filename given to
the constructor is used.
"""
if filename == None:
filename = self.__filename
else:
self.__filename = filename
if filename == None:
raise ValueError, "No filename specified"
if self.__deferredRead:
# Read all deferred data BEFORE we open the file for
# writing. Otherwise, who knows what would happen if we're
# asked to overwrite the same file we're reading? Besides,
# we'll need the data available to write it anyway.
#
# Sneaky. Here we access the 0th component of each object,
# the 0th property of that component, and the 0th element
# of that property's data. If it hasn't been read yet,
# this is sufficient to force the data for all the properties
# of that object to be read now.
for o in self.objects():
try:
o[0][0][0]
except:
# Must have an object with no components or a
# component with no properties.
pass
self.close()
writer = gto.Writer()
writer.open( filename, compress )
for obj in self.objects():
objName = obj.name()
objProtocol = obj.protocol()
objProtocolVersion = obj.protocolVersion()
writer.beginObject( objName, objProtocol, objProtocolVersion )
for comp in obj.components():
compName = comp.name()
compInterp = comp.interp()
compFlags = comp.flags()
if compInterp:
writer.beginComponent( compName, compInterp, compFlags )
else:
writer.beginComponent( compName, compFlags )
for prop in comp.properties():
propName = prop.name()
propType = prop.type()
propSize = prop.size()
propWidth = prop.width()
propInterp = prop.interp()
if propType == gto.STRING:
writer.intern( prop() )
if propInterp:
writer.property( propName, propType, propSize,
propWidth, propInterp )
else:
writer.property( propName, propType, propSize,
propWidth )
writer.endComponent()
writer.endObject()
writer.beginData()
for obj in self.objects():
for comp in obj.components():
for prop in comp.properties():
writer.propertyData( prop() )
writer.endData()
writer.close()