def ReadMapDataPacket(self, qtpath, packet_type, channel, layer_id):
"""Returns packet at given address and channel.
If packet is not found, throws an exception.
Args:
qtpath: the quadtree node of the map packet.
packet_type: the type of data in the map packet.
channel: the channel of the map packet.
layer_id: id of layer in the composite globe.
Returns:
The map packet itself.
Raises:
PortableException: if unknown or unreadable glx.
UnableToFindException: if unable to find the map data packet.
"""
if not self.unpacker_:
raise portable_exceptions.PortableException(
UNKOWN_OR_UNREADABLE_GLX_ERROR_MSG % self.globe_name_)
if self.unpacker_.FindMapDataPacket(qtpath, packet_type, channel,
layer_id, self.file_loc_):
return self._GetData()
else:
raise portable_exceptions.UnableToFindException(
"Unable to find packet.")
def ReadDbRoot(self, path, layer_id):
"""Returns dbroot.
If dbroot is not found, throws an exception.
Args:
path: path to dbRoot file to use. If not found uses first qtp packet.
layer_id: id of layer in the composite globe.
Returns:
The dbroot.
Raises:
PortableException: if unknown or unreadable glx.
UnableToFindException: if unable to find a dbroot.
"""
if not self.unpacker_:
raise portable_exceptions.PortableException(
UNKOWN_OR_UNREADABLE_GLX_ERROR_MSG % self.globe_name_)
if self.unpacker_.FindLayerFile(path, layer_id, self.file_loc_):
data = self._GetData()
print "path dbroot: ", path, len(data)
return data
elif self.unpacker_.FindQtpPacket("0", glc_unpacker.kDbRootPacket, 0,
layer_id, self.file_loc_):
return self._GetData()
else:
print "Did not find dbRoot for: ", layer_id
raise portable_exceptions.UnableToFindException(
"Unable to find dbroot.")
def ReadFile(self, relative_file_path):
"""Returns content of file stored in globe package file.
If file is not found, returns an empty string.
Args:
relative_file_path: Relative path to file within glx.
Returns:
Data from the file within the glx.
Raises:
PortableException: if unknown or unreadable glx.
UnableToFindException: if unable to find specified file.
"""
if not self.unpacker_:
raise portable_exceptions.PortableException(
UNKOWN_OR_UNREADABLE_GLX_ERROR_MSG % self.globe_name_)
relative_file_path = relative_file_path.encode("ascii", "ignore")
# print "FindFile", relative_file_path
if self.unpacker_.FindFile(relative_file_path, self.file_loc_):
# print "Found file", self.file_loc_.Offset()
return self._GetData()
else:
raise portable_exceptions.UnableToFindException(
"Unable to find file %s." % relative_file_path)
def ReadMetaDbRoot(self):
"""Reads meta dbroot.
Returns:
meta dbroot if found, otherwise throws an exception.
Raises:
PortableException: if unknown or unreadable glx.
UnableToFindException: if unable to find meta dbroot.
"""
if not self.unpacker_:
raise portable_exceptions.PortableException(
UNKOWN_OR_UNREADABLE_GLX_ERROR_MSG % self.globe_name_)
if self.unpacker_.FindMetaDbRoot(self.file_loc_):
return self._GetData()
else:
raise portable_exceptions.UnableToFindException(
"Unable to find meta dbroot.")
def ReadQtPacket(self, qtpath, layer_id):
"""Returns quadtree packet at given address.
If quadtree packet is not found, throws an exception.
Args:
qtpath: the quadtree node of the quad set packet.
layer_id: id of layer in the composite globe.
Returns:
The quadtree packet itself.
Raises:
PortableException: if unknown or unreadable glx.
UnableToFindException: if unable to find the quad set packet.
"""
if not self.unpacker_:
raise portable_exceptions.PortableException(
UNKOWN_OR_UNREADABLE_GLX_ERROR_MSG % self.globe_name_)
if self.unpacker_.FindQtpPacket(qtpath, glc_unpacker.kQtpPacket, 0,
layer_id, self.file_loc_):
return self._GetData()
else:
raise portable_exceptions.UnableToFindException(
"Unable to find quadtree packet.")
def ReadLayerFile(self, relative_file_path, layer_id):
"""Returns content of file stored in layer package file.
If file is not found, returns an empty string.
Args:
relative_file_path: relative path to file in the layer.
layer_id: id of layer in the composite globe.
Returns:
The file content.
Raises:
PortableException: if unknown or unreadable glx.
UnableToFindException: if unable to find the specified file.
"""
if not self.unpacker_:
raise portable_exceptions.PortableException(
UNKOWN_OR_UNREADABLE_GLX_ERROR_MSG % self.globe_name_)
if self.unpacker_.FindLayerFile(relative_file_path, layer_id,
self.file_loc_):
return self._GetData()
else:
raise portable_exceptions.UnableToFindException(
"Unable to find file.")