def _del(self, key, **kw_args):
ext.hcdir(self.__rz_path, " ")
# Kill the sucka.
if self.isdir(key):
ext.hddir(key)
# Update the subdirectory cache.
if key in self.__subdirs:
# The directory no longer exists, so don't try to purge
# cycles when cleaning it up.
self.__subdirs[key].purge_cycles = False
# Uncahce it.
del self.__subdirs[key]
else:
# We need its RZ ID to delete it.
rz_id = self.__info[key].rz_id
ext.hscr(rz_id, 0, " ")
# Update the info cache.
del self.__info[key]
def _hlnext(rz_path):
"""An iterator over entries in a directory.
'path' -- The RZ path to the directory.
yields -- '(key, rz_id, type)' for each element in the directory."""
ext.hcdir(rz_path, " ")
rz_id = 0
while True:
rz_id, rz_type, key = ext.hlnext(rz_id, "12ND")
if rz_id == 0:
raise StopIteration
# Always use lower-case names.
key = key.lower()
yield key, rz_id, {
"1": "1D histogram",
"2": "2D histogram",
"N": "table",
"D": "directory",
}[rz_type]
def _set(self, key, value, **kw_args):
# Was the RZ ID specified as a keyword argument?
rz_id = kw_args.get("rz_id", None)
if rz_id is None:
if hasattr(object, "rz_id"):
# The object has an 'rz_id' attribute, so use its value.
rz_id = int(object.rz_id)
else:
# No RZ ID specified; choose an ID.
rz_id = self._make_rz_id()
if hep.isMap(value):
type = "directory"
# Make a directory.
ext.hcdir(self.__rz_path, " ")
ext.hmdir(key, " ")
# Fill in the initial entries, if some where specified.
if len(value) > 0:
self.get(key, **kw_args).update(value, **kw_args)
# Invalidate the directory cache.
if key in self.__subdirs:
del self.__subdirs[key]
elif hep.hist.isHistogram(value):
# Make the histogram object in PAWC memory.
if value.dimensions == 1:
type = "1D histogram"
self._make1DHistogram(value, key, rz_id)
elif value.dimensions == 2:
type = "2D histogram"
self._make2DHistogram(value, key, rz_id)
else:
raise NotImplementedError, \
"cannot save an %d-D histogram in an HBOOK file" \
% dimensions
# Save the histogram to the HBOOK file.
ext.hcdir(self.__rz_path, " ")
ext.hrout(rz_id, " ")
# Clean up the in-memory PAW histogram.
ext.hcdir("//PAWC", " ")
ext.hdelet(rz_id)
else:
raise NotImplementedError, \
"cannot save a %s in an HBOOK file" \
% type(value).__name__
# Update the info cache.
self.__info[key] = self.__makeinfo(key, rz_id, type)
def _get(self, key, **kw_args):
# Look up the specified path.
info = self.__info[key]
if info.type == "directory":
# It's a directory. Return a 'Directory' object, checking
# the cache first.
if not self.__subdirs.has_key(key):
self.__subdirs[key] = Directory(
self.__file, join(self.__path, key), self.purge_cycles)
return self.__subdirs[key]
# Otherwise, load it into memory.
ext.hcdir(self.__rz_path, " ")
ext.hrin(info.rz_id, 999999, 0)
# Construct a Python object for it.
if info.type == "table":
# Build a table handle.
table = ext.openTuple(
info.rz_id, self.__rz_path, self.writable)
# Associate this file with this table, so that the file
# isn't closed while the table handle still exists.
table.file = self
return table
elif info.type == "1D histogram":
histogram = self._read1DHistogram(info.rz_id)
# Remove the HBOOK object from memory.
ext.hcdir("//PAWC", " ")
ext.hdelet(info.rz_id)
# Return the histogram.
return histogram
elif info.type == "2D histogram":
histogram = self._read2DHistogram(info.rz_id)
# Remove the HBOOK object from memory.
ext.hcdir("//PAWC", " ")
ext.hdelet(info.rz_id)
# Return the histogram.
return histogram
else:
raise NotImplementedError, "type '%s'" % info.type
def __del__(self):
# Purge cycles now, if selected.
if self.purge_cycles:
ext.hcdir(self.__rz_path, " ")
ext.rzpurg(1)
