def joinBlocks(inputMd, blockPrefix=None):
mdImages = MetaData()
mdAll = MetaData()
mdBlocks = getBlocksInMetaDataFile(inputMd)
for mdBlock in mdBlocks:
if blockPrefix is not None:
if mdBlock.startswith(blockPrefix):
mdImages.read(mdBlock + "@" + inputMd)
mdAll.unionAll(mdImages)
else:
mdImages.read(mdBlock + "@" + inputMd)
mdAll.unionAll(mdImages)
return mdAll
def getFirstRow(filename):
""" Create a MetaData but only read the first row.
This method should be used for validations of labels
or metadata size, but the full metadata is not needed.
"""
md = MetaData()
md.read(filename, 1)
if md.getParsedLines():
row = Row()
row.readFromMd(md, md.firstObject())
else:
row = None
return row
def iterRows(md, sortByLabel=None):
""" Iterate over the rows of the given metadata.
Params:
md: a MetaData object or a filename (MetaData will be read)
sortByLabel: a label to sort the metadata before iterate.
"""
# If md is string, take as filename and create the metadata
if isinstance(md, basestring):
md = MetaData(md)
if sortByLabel is not None:
md.sort(sortByLabel)
row = Row()
for objId in md:
row.readFromMd(md, objId)
yield row
def iterRows(md, sortByLabel=None):
""" Iterate over the rows of the given metadata.
Params:
md: a MetaData object or a filename (MetaData will be read)
sortByLabel: a label to sort the metadata before iterate.
"""
# If md is string, take as filename and create the metadata
if isinstance(md, basestring):
md = MetaData(md)
if sortByLabel is not None:
md.sort(sortByLabel)
row = Row()
for objId in md:
row.readFromMd(md, objId)
yield row
def getFirstRow(mdOrFn):
""" Return the first object of a metadata.
Params:
mdOrFn: you can pass a metadata or a filename as argument.
"""
if isinstance(mdOrFn, basestring):
md = MetaData()
md.read(mdOrFn, 1)
else: # mdOrFn is MetaData
md = mdOrFn
if md.getParsedLines():
row = Row()
row.readFromMd(md, md.firstObject())
else:
row = None
return row
def getFirstRow(mdOrFn):
""" Return the first object of a metadata.
Params:
mdOrFn: you can pass a metadata or a filename as argument.
"""
if isinstance(mdOrFn, basestring):
md = MetaData()
md.read(mdOrFn, 1)
else: # mdOrFn is MetaData
md = mdOrFn
if md.getParsedLines():
row = Row()
row.readFromMd(md, md.firstObject())
else:
row = None
return row
def getSize(filename):
""" Return the metadata size without parsing entirely. """
md = MetaData()
md.read(filename, 1)
return md.getParsedLines()
def getSize(filename):
""" Return the metadata size without parsing entirely. """
md = MetaData()
md.read(filename, 1)
return md.getParsedLines()
