Initial port to python3
[htsworkflow.git] / htsworkflow / pipelines / eland.py
index cf6de6c55a05f867c01bd595c57ae931957a66b6..feb7ff7c066ea070b836f47ce4d03536b8416095 100644 (file)
@@ -1,15 +1,18 @@
 """
 Analyze ELAND files
 """
-
+import collections
 from glob import glob
 import logging
 import os
 import re
 import stat
 import sys
+import types
 
-from htsworkflow.pipelines.runfolder import ElementTree, LANE_LIST
+from htsworkflow.pipelines import ElementTree, LANE_LIST
+from htsworkflow.pipelines.samplekey import SampleKey
+from htsworkflow.pipelines.genomemap import GenomeMap
 from htsworkflow.util.ethelp import indent, flatten
 from htsworkflow.util.opener import autoopen
 
@@ -40,9 +43,10 @@ class ResultLane(object):
     XML_VERSION = 2
     LANE = 'ResultLane'
 
-    def __init__(self, pathname=None, lane_id=None, end=None, xml=None):
-        self.pathname = pathname
-        self._sample_name = None
+    def __init__(self, pathnames=None, sample=None, lane_id=None, end=None,
+                 xml=None):
+        self.pathnames = pathnames
+        self.sample_name = sample
         self.lane_id = lane_id
         self.end = end
         self._reads = None
@@ -56,21 +60,6 @@ class ResultLane(object):
         """
         pass
 
-    def _update_name(self):
-        # extract the sample name
-        if self.pathname is None:
-            return
-
-        path, name = os.path.split(self.pathname)
-        split_name = name.split('_')
-        self._sample_name = split_name[0]
-
-    def _get_sample_name(self):
-        if self._sample_name is None:
-            self._update_name()
-        return self._sample_name
-    sample_name = property(_get_sample_name)
-
     def _get_reads(self):
         if self._reads is None:
             self._update()
@@ -80,6 +69,15 @@ class ResultLane(object):
     def get_elements(self):
         return None
 
+    def __repr__(self):
+        name = []
+
+        name.append('L%s' % (self.lane_id,))
+        name.append('R%s' % (self.end,))
+        name.append('S%s' % (self.sample_name,))
+
+        return '<ResultLane(' + ",".join(name) + ')>'
+
 class ElandLane(ResultLane):
     """
     Process an eland result file
@@ -93,19 +91,29 @@ class ElandLane(ResultLane):
     SCORE_QC = 1
     SCORE_READ = 2
 
-    def __init__(self, pathname=None, lane_id=None, end=None, genome_map=None, eland_type=None, xml=None):
-        super(ElandLane, self).__init__(pathname, lane_id, end)
+    def __init__(self, pathnames=None, sample=None, lane_id=None, end=None,
+                 genome_map=None, eland_type=None, xml=None):
+        super(ElandLane, self).__init__(pathnames, sample, lane_id, end)
 
         self._mapped_reads = None
         self._match_codes = None
-        if genome_map is None:
-            genome_map = {}
-        self.genome_map = genome_map
+        self._reads = None
+        self.genome_map = GenomeMap(genome_map)
         self.eland_type = None
 
         if xml is not None:
             self.set_elements(xml)
 
+    def __repr__(self):
+        name = []
+
+        name.append('L%s' % (self.lane_id,))
+        name.append('R%s' % (self.end,))
+        name.append('S%s' % (self.sample_name,))
+
+        reads = str(self._reads) if self._reads is not None else 'Uncounted'
+        return '<ElandLane(' + ",".join(name) + ' = '+ reads + ')>'
+
     def _guess_eland_type(self, pathname):
         if self.eland_type is None:
           # attempt autodetect eland file type
@@ -126,35 +134,43 @@ class ElandLane(ResultLane):
         Actually read the file and actually count the reads
         """
         # can't do anything if we don't have a file to process
-        if self.pathname is None:
+        if self.pathnames is None or len(self.pathnames) == 0:
             return
-        self._guess_eland_type(self.pathname)
+        pathname = self.pathnames[-1]
+        self._guess_eland_type(pathname)
 
-        if os.stat(self.pathname)[stat.ST_SIZE] == 0:
+        if os.stat(pathname)[stat.ST_SIZE] == 0:
             raise RuntimeError("Eland isn't done, try again later.")
 
-        LOGGER.debug("summarizing results for %s" % (self.pathname))
+        LOGGER.debug("summarizing results for %s" % (pathname))
+        self._match_codes = MatchCodes()
+        self._mapped_reads = MappedReads()
+        self._reads = 0
+
+        for pathname in self.pathnames:
+            stream = autoopen(pathname, 'r')
+            if self.eland_type == ELAND_SINGLE:
+                result = self._update_eland_result(stream)
+            elif self.eland_type == ELAND_MULTI or \
+                 self.eland_type == ELAND_EXTENDED:
+                result = self._update_eland_multi(stream)
+            elif self.eland_type == ELAND_EXPORT:
+                result = self._update_eland_export(stream)
+            else:
+                errmsg = "Only support single/multi/extended eland files"
+                raise NotImplementedError(errmsg)
+            stream.close()
 
-        stream = autoopen(self.pathname, 'r')
-        if self.eland_type == ELAND_SINGLE:
-            result = self._update_eland_result(stream)
-        elif self.eland_type == ELAND_MULTI or \
-             self.eland_type == ELAND_EXTENDED:
-            result = self._update_eland_multi(stream)
-        elif self.eland_type == ELAND_EXPORT:
-            result = self._update_eland_export(stream)
-        else:
-          raise NotImplementedError("Only support single/multi/extended eland files")
-        self._match_codes, self._mapped_reads, self._reads = result
+            match, mapped, reads = result
+            self._match_codes += match
+            self._mapped_reads += mapped
+            self._reads += reads
 
     def _update_eland_result(self, instream):
         reads = 0
-        mapped_reads = {}
+        mapped_reads = MappedReads()
+        match_codes = MatchCodes()
 
-        match_codes = {'NM':0, 'QC':0, 'RM':0,
-                       'U0':0, 'U1':0, 'U2':0,
-                       'R0':0, 'R1':0, 'R2':0,
-                      }
         for line in instream:
             reads += 1
             fields = line.split()
@@ -174,12 +190,9 @@ class ElandLane(ResultLane):
         MATCH_INDEX = 2
         LOCATION_INDEX = 3
         reads = 0
-        mapped_reads = {}
+        mapped_reads = MappedReads()
+        match_codes = MatchCodes()
 
-        match_codes = {'NM':0, 'QC':0, 'RM':0,
-                       'U0':0, 'U1':0, 'U2':0,
-                       'R0':0, 'R1':0, 'R2':0,
-                      }
         for line in instream:
             reads += 1
             fields = line.split()
@@ -204,12 +217,8 @@ class ElandLane(ResultLane):
         LOCATION_INDEX = 10
         DESCRIPTOR_INDEX= 13
         reads = 0
-        mapped_reads = {}
-
-        match_codes = {'NM':0, 'QC':0, 'RM':0,
-                       'U0':0, 'U1':0, 'U2':0,
-                       'R0':0, 'R1':0, 'R2':0,
-                      }
+        mapped_reads = MappedReads()
+        match_codes = MatchCodes()
 
         for line in instream:
             reads += 1
@@ -240,7 +249,7 @@ class ElandLane(ResultLane):
         groups = ElandLane.MATCH_COUNTS_RE.match(match)
         if groups is None:
             # match is not of the form [\d]+:[\d]+:[\d]+
-            if match_codes.has_key(match):
+            if match in match_codes:
                 # match is one quality control codes QC/NM etc
                 match_codes[match] += 1
                 return ElandLane.SCORE_QC
@@ -367,7 +376,7 @@ class ElandLane(ResultLane):
     def get_elements(self):
         lane = ElementTree.Element(ElandLane.LANE,
                                    {'version':
-                                    unicode(ElandLane.XML_VERSION)})
+                                    str(ElandLane.XML_VERSION)})
         sample_tag = ElementTree.SubElement(lane, SAMPLE_NAME)
         sample_tag.text = self.sample_name
         lane_tag = ElementTree.SubElement(lane, LANE_ID)
@@ -376,22 +385,22 @@ class ElandLane(ResultLane):
             end_tag = ElementTree.SubElement(lane, END)
             end_tag.text = str(self.end)
         genome_map = ElementTree.SubElement(lane, GENOME_MAP)
-        for k, v in self.genome_map.items():
+        for k, v in list(self.genome_map.items()):
             item = ElementTree.SubElement(
                 genome_map, GENOME_ITEM,
-                {'name':k, 'value':unicode(v)})
+                {'name':k, 'value':str(v)})
         mapped_reads = ElementTree.SubElement(lane, MAPPED_READS)
-        for k, v in self.mapped_reads.items():
+        for k, v in list(self.mapped_reads.items()):
             item = ElementTree.SubElement(
                 mapped_reads, MAPPED_ITEM,
-                {'name':k, 'value':unicode(v)})
+                {'name':k, 'value':str(v)})
         match_codes = ElementTree.SubElement(lane, MATCH_CODES)
-        for k, v in self.match_codes.items():
+        for k, v in list(self.match_codes.items()):
             item = ElementTree.SubElement(
                 match_codes, MATCH_ITEM,
-                {'name':k, 'value':unicode(v)})
+                {'name':k, 'value':str(v)})
         reads = ElementTree.SubElement(lane, READS)
-        reads.text = unicode(self.reads)
+        reads.text = str(self.reads)
 
         return lane
 
@@ -406,7 +415,7 @@ class ElandLane(ResultLane):
         for element in tree:
             tag = element.tag.lower()
             if tag == SAMPLE_NAME.lower():
-                self._sample_name = element.text
+                self.sample_name = element.text
             elif tag == LANE_ID.lower():
                 self.lane_id = int(element.text)
             elif tag == END.lower():
@@ -431,6 +440,93 @@ class ElandLane(ResultLane):
             else:
                 LOGGER.warn("ElandLane unrecognized tag %s" % (element.tag,))
 
+
+class MatchCodes(collections.MutableMapping):
+    """Mapping to hold match counts -
+    supports combining two match count sets together
+    """
+    def __init__(self, initializer=None):
+        self.match_codes = {'NM':0, 'QC':0, 'RM':0,
+                            'U0':0, 'U1':0, 'U2':0,
+                            'R0':0, 'R1':0, 'R2':0,
+                            }
+
+        if initializer is not None:
+            if not isinstance(initializer, collections.Mapping):
+                raise ValueError("Expected dictionary like class")
+            for key in initializer:
+                if key not in self.match_codes:
+                    errmsg = "Initializer can only contain: %s"
+                    raise ValueError(errmsg % (",".join(list(self.match_codes.keys()))))
+                self.match_codes[key] += initializer[key]
+
+    def __iter__(self):
+        return iter(self.match_codes)
+
+    def __delitem__(self, key):
+        raise RuntimeError("delete not allowed")
+
+    def __getitem__(self, key):
+        return self.match_codes[key]
+
+    def __setitem__(self, key, value):
+        if key not in self.match_codes:
+            errmsg = "Unrecognized key, allowed values are: %s"
+            raise ValueError(errmsg % (",".join(list(self.match_codes.keys()))))
+        self.match_codes[key] = value
+
+    def __len__(self):
+        return len(self.match_codes)
+
+    def __add__(self, other):
+        if not isinstance(other, MatchCodes):
+            raise ValueError("Expected a MatchCodes, got %s", str(type(other)))
+
+        newobj = MatchCodes(self)
+        for key, value in list(other.items()):
+            newobj[key] = self.get(key, 0) + other[key]
+
+        return newobj
+
+
+class MappedReads(collections.MutableMapping):
+    """Mapping to hold mapped reads -
+    supports combining two mapped read sets together
+    """
+    def __init__(self, initializer=None):
+        self.mapped_reads = {}
+
+        if initializer is not None:
+            if not isinstance(initializer, collections.Mapping):
+                raise ValueError("Expected dictionary like class")
+            for key in initializer:
+                self[key] = self.setdefault(key, 0) + initializer[key]
+
+    def __iter__(self):
+        return iter(self.mapped_reads)
+
+    def __delitem__(self, key):
+        del self.mapped_reads[key]
+
+    def __getitem__(self, key):
+        return self.mapped_reads[key]
+
+    def __setitem__(self, key, value):
+        self.mapped_reads[key] = value
+
+    def __len__(self):
+        return len(self.mapped_reads)
+
+    def __add__(self, other):
+        if not isinstance(other, MappedReads):
+            raise ValueError("Expected a MappedReads, got %s", str(type(other)))
+
+        newobj = MappedReads(self)
+        for key in other:
+            newobj[key] = self.get(key, 0) + other[key]
+
+        return newobj
+
 class SequenceLane(ResultLane):
     XML_VERSION=1
     LANE = 'SequenceLane'
@@ -441,9 +537,10 @@ class SequenceLane(ResultLane):
     FASTQ_TYPE = 2
     SEQUENCE_DESCRIPTION = { NONE_TYPE: 'None', SCARF_TYPE: 'SCARF', FASTQ_TYPE: 'FASTQ' }
 
-    def __init__(self, pathname=None, lane_id=None, end=None, xml=None):
+    def __init__(self, pathnames=None, sample=None, lane_id=None, end=None,
+                 xml=None):
         self.sequence_type = None
-        super(SequenceLane, self).__init__(pathname, lane_id, end, xml)
+        super(SequenceLane, self).__init__(pathnames, sample, lane_id, end, xml)
 
     def _guess_sequence_type(self, pathname):
         """
@@ -465,18 +562,19 @@ class SequenceLane(ResultLane):
         Actually read the file and actually count the reads
         """
         # can't do anything if we don't have a file to process
-        if self.pathname is None:
+        if self.pathnames is None:
             return
 
-        if os.stat(self.pathname)[stat.ST_SIZE] == 0:
+        pathname = self.pathnames[-1]
+        if os.stat(pathname)[stat.ST_SIZE] == 0:
             raise RuntimeError("Sequencing isn't done, try again later.")
 
-        self._guess_sequence_type(self.pathname)
+        self._guess_sequence_type(pathname)
 
-        LOGGER.info("summarizing results for %s" % (self.pathname))
+        LOGGER.info("summarizing results for %s" % (pathname))
         lines = 0
-        f = open(self.pathname)
-        for l in f.xreadlines():
+        f = open(pathname)
+        for l in f:
             lines += 1
         f.close()
 
@@ -485,12 +583,13 @@ class SequenceLane(ResultLane):
         elif self.sequence_type == SequenceLane.FASTQ_TYPE:
             self._reads = lines / 4
         else:
-          raise NotImplementedError("This only supports scarf or fastq squence files")
+            errmsg = "This only supports scarf or fastq squence files"
+            raise NotImplementedError(errmsg)
 
     def get_elements(self):
         lane = ElementTree.Element(SequenceLane.LANE,
                                    {'version':
-                                    unicode(SequenceLane.XML_VERSION)})
+                                    str(SequenceLane.XML_VERSION)})
         sample_tag = ElementTree.SubElement(lane, SAMPLE_NAME)
         sample_tag.text = self.sample_name
         lane_tag = ElementTree.SubElement(lane, LANE_ID)
@@ -499,21 +598,21 @@ class SequenceLane(ResultLane):
             end_tag = ElementTree.SubElement(lane, END)
             end_tag.text = str(self.end)
         reads = ElementTree.SubElement(lane, READS)
-        reads.text = unicode(self.reads)
+        reads.text = str(self.reads)
         sequence_type = ElementTree.SubElement(lane, SequenceLane.SEQUENCE_TYPE)
-        sequence_type.text = unicode(SequenceLane.SEQUENCE_DESCRIPTION[self.sequence_type])
+        sequence_type.text = str(SequenceLane.SEQUENCE_DESCRIPTION[self.sequence_type])
 
         return lane
 
     def set_elements(self, tree):
         if tree.tag != SequenceLane.LANE:
             raise ValueError('Exptecting %s' % (SequenceLane.LANE,))
-        lookup_sequence_type = dict([ (v,k) for k,v in SequenceLane.SEQUENCE_DESCRIPTION.items()])
+        lookup_sequence_type = dict([ (v,k) for k,v in list(SequenceLane.SEQUENCE_DESCRIPTION.items())])
 
         for element in tree:
             tag = element.tag.lower()
             if tag == SAMPLE_NAME.lower():
-                self._sample_name = element.text
+                self.sample_name = element.text
             elif tag == LANE_ID.lower():
                 self.lane_id = int(element.text)
             elif tag == END.lower():
@@ -525,7 +624,7 @@ class SequenceLane(ResultLane):
             else:
                 LOGGER.warn("SequenceLane unrecognized tag %s" % (element.tag,))
 
-class ELAND(object):
+class ELAND(collections.MutableMapping):
     """
     Summarize information from eland files
     """
@@ -534,32 +633,57 @@ class ELAND(object):
     ELAND = 'ElandCollection'
     LANE = 'Lane'
     LANE_ID = 'id'
+    SAMPLE = 'sample'
     END = 'end'
 
     def __init__(self, xml=None):
         # we need information from the gerald config.xml
-        self.results = [{},{}]
+        self.results = {}
 
         if xml is not None:
             self.set_elements(xml)
 
-        if len(self.results[0]) == 0:
-            # Initialize our eland object with meaningless junk
-            for l in  LANE_LIST:
-                self.results[0][l] = ResultLane(lane_id=l, end=0)
+    def __getitem__(self, key):
+        if not isinstance(key, SampleKey):
+            raise ValueError("Key must be a %s" % (str(type(SampleKey))))
+        return self.results[key]
+
+    def __setitem__(self, key, value):
+        if not isinstance(key, SampleKey):
+            raise ValueError("Key must be a %s" % (str(type(SampleKey))))
+        self.results[key] = value
+
+    def __delitem__(self, key):
+        del self.result[key]
+
+    def __iter__(self):
+        keys = iter(self.results.keys())
+        for k in sorted(keys):
+            yield k
+
+    def __len__(self):
+        return len(self.results)
 
+    def find_keys(self, search):
+        """Return results that match key"""
+        if not isinstance(search, SampleKey):
+            raise ValueError("Key must be a %s" % (str(type(SampleKey))))
+        if not search.iswild:
+            yield self[search]
+        for key in list(self.keys()):
+            if key.matches(search): yield key
 
     def get_elements(self):
         root = ElementTree.Element(ELAND.ELAND,
-                                   {'version': unicode(ELAND.XML_VERSION)})
-        for end in range(len(self.results)):
-           end_results = self.results[end]
-           for lane_id, lane in end_results.items():
-                eland_lane = lane.get_elements()
-                if eland_lane is not None:
-                    eland_lane.attrib[ELAND.END] = unicode (end)
-                    eland_lane.attrib[ELAND.LANE_ID] = unicode(lane_id)
-                    root.append(eland_lane)
+                                   {'version': str(ELAND.XML_VERSION)})
+
+        for key in self:
+            eland_lane = self[key].get_elements()
+            eland_lane.attrib[ELAND.END] = str(self[key].end-1)
+            eland_lane.attrib[ELAND.LANE_ID] = str(self[key].lane_id)
+            eland_lane.attrib[ELAND.SAMPLE] = str(self[key].sample_name)
+            root.append(eland_lane)
+        return root
         return root
 
     def set_elements(self, tree):
@@ -568,136 +692,184 @@ class ELAND(object):
         for element in list(tree):
             lane_id = int(element.attrib[ELAND.LANE_ID])
             end = int(element.attrib.get(ELAND.END, 0))
+            sample = element.attrib.get(ELAND.SAMPLE, 's')
             if element.tag.lower() == ElandLane.LANE.lower():
                 lane = ElandLane(xml=element)
             elif element.tag.lower() == SequenceLane.LANE.lower():
                 lane = SequenceLane(xml=element)
 
-            self.results[end][lane_id] = lane
-
-def check_for_eland_file(basedir, pattern, lane_id, end):
-   if end is None:
-      full_lane_id = lane_id
-   else:
-      full_lane_id = "%d_%d" % ( lane_id, end )
-
-   basename = pattern % (full_lane_id,)
-   LOGGER.debug("Eland pattern: %s" %(basename,))
-   pathname = os.path.join(basedir, basename)
-   if os.path.exists(pathname):
-       LOGGER.info('found eland file in %s' % (pathname,))
-       return pathname
-   else:
-       return None
-
-def update_result_with_eland(gerald, results, lane_id, end, pathname, genome_maps):
-    # yes the lane_id is also being computed in ElandLane._update
-    # I didn't want to clutter up my constructor
-    # but I needed to persist the sample_name/lane_id for
-    # runfolder summary_report
-    path, name = os.path.split(pathname)
-    LOGGER.info("Adding eland file %s" %(name,))
-    # split_name = name.split('_')
-    # lane_id = int(split_name[1])
-
-    genome_map = {}
-    if genome_maps is not None:
-        genome_map = genome_maps[lane_id]
-    elif gerald is not None:
-        genome_dir = gerald.lanes[lane_id].eland_genome
-        if genome_dir is not None:
-            genome_map = build_genome_fasta_map(genome_dir)
-
-    lane = ElandLane(pathname, lane_id, end, genome_map)
-
-    if end is None:
-        effective_end =  0
-    else:
-        effective_end = end - 1
-
-    results[effective_end][lane_id] = lane
-
-def update_result_with_sequence(gerald, results, lane_id, end, pathname):
-    result = SequenceLane(pathname, lane_id, end)
-
-    if end is None:
-        effective_end =  0
-    else:
-        effective_end = end - 1
-
-    results[effective_end][lane_id] = result
+            key = SampleKey(lane=lane_id, read=end+1, sample=sample)
+            self.results[key] = lane
 
 
-def eland(gerald_dir, gerald=None, genome_maps=None):
-    e = ELAND()
+    def update_result_with_eland(self, gerald, key, pathnames,
+                                 genome_maps):
+        # yes the lane_id is also being computed in ElandLane._update
+        # I didn't want to clutter up my constructor
+        # but I needed to persist the sample_name/lane_id for
+        # runfolder summary_report
+        names = [ os.path.split(p)[1] for p in pathnames]
+        LOGGER.info("Adding eland files %s" %(",".join(names),))
+        basedir = os.path.split(pathnames[0])[0]
+        gs_template = "{0}_*_L{1:03}_genomesize.xml"
+        genomesize = glob(
+            os.path.join(basedir,
+                         gs_template.format(key.sample, key.lane)))
+
+
+        genome_map = GenomeMap()
+        if genome_maps is not None:
+            genome_map = GenomeMap(genome_maps[key.lane])
+        elif len(genomesize) > 0:
+            LOGGER.info("Found {0}".format(genomesize))
+            genome_map.parse_genomesize(genomesize[0])
+        elif gerald is not None:
+            genome_dir = gerald.lanes[key].eland_genome
+            if genome_dir is not None:
+                genome_map.scan_genome_dir(genome_dir)
+
+        lane = ElandLane(pathnames, key.sample, key.lane, key.read, genome_map)
+
+        self.results[key] = lane
 
-    lane_ids = range(1,9)
-    ends = [None, 1, 2]
-
-    basedirs = [gerald_dir]
-
-    # if there is a basedir/Temp change basedir to point to the temp
-    # directory, as 1.1rc1 moves most of the files we've historically
-    # cared about to that subdirectory.
-    # we should look into what the official 'result' files are.
-    # and 1.3 moves them back
-    basedir_temp = os.path.join(gerald_dir, 'Temp')
-    if os.path.isdir(basedir_temp):
-        basedirs.append(basedir_temp)
-
-
-    # the order in patterns determines the preference for what
-    # will be found.
-    MAPPED_ELAND = 0
-    SEQUENCE = 1
-    patterns = [('s_%s_eland_result.txt', MAPPED_ELAND),
-                ('s_%s_eland_result.txt.bz2', MAPPED_ELAND),
-                ('s_%s_eland_result.txt.gz', MAPPED_ELAND),
-                ('s_%s_eland_extended.txt', MAPPED_ELAND),
-                ('s_%s_eland_extended.txt.bz2', MAPPED_ELAND),
-                ('s_%s_eland_extended.txt.gz', MAPPED_ELAND),
-                ('s_%s_eland_multi.txt', MAPPED_ELAND),
-                ('s_%s_eland_multi.txt.bz2', MAPPED_ELAND),
-                ('s_%s_eland_multi.txt.gz', MAPPED_ELAND),
-                ('s_%s_export.txt', MAPPED_ELAND),
-                ('s_%s_export.txt.bz2', MAPPED_ELAND),
-                ('s_%s_export.txt.gz', MAPPED_ELAND),
-                ('s_%s_sequence.txt', SEQUENCE),]
-
-    for basedir in basedirs:
-        for end in ends:
-            for lane_id in lane_ids:
-                for p in patterns:
-                    pathname = check_for_eland_file(basedir, p[0], lane_id, end)
-                    if pathname is not None:
-                        if p[1] == MAPPED_ELAND:
-                            update_result_with_eland(gerald, e.results, lane_id, end, pathname, genome_maps)
-                        elif p[1] == SEQUENCE:
-                            update_result_with_sequence(gerald, e.results, lane_id, end, pathname)
-                        break
-                else:
-                    LOGGER.debug("No eland file found in %s for lane %s and end %s" %(basedir, lane_id, end))
-                    continue
+    def update_result_with_sequence(self, gerald, key, pathnames,
+                                    genome_maps=None):
+        self.results[key] = SequenceLane(pathnames,
+                                         key.sample, key.lane, key.read)
 
+
+def eland(gerald_dir, gerald=None, genome_maps=None):
+    e = ELAND()
+    eland_files = ElandMatches(e)
+    # collect
+    for path, dirnames, filenames in os.walk(gerald_dir):
+        for filename in filenames:
+            pathname = os.path.abspath(os.path.join(path, filename))
+            eland_files.add(pathname)
+    for key in eland_files:
+        eland_files.count(key, gerald, genome_maps)
     return e
 
-def build_genome_fasta_map(genome_dir):
-    # build fasta to fasta file map
-    LOGGER.info("Building genome map")
-    genome = genome_dir.split(os.path.sep)[-1]
-    fasta_map = {}
-    for vld_file in glob(os.path.join(genome_dir, '*.vld')):
-        is_link = False
-        if os.path.islink(vld_file):
-            is_link = True
-        vld_file = os.path.realpath(vld_file)
-        path, vld_name = os.path.split(vld_file)
-        name, ext = os.path.splitext(vld_name)
-        if is_link:
-            fasta_map[name] = name
-        else:
-            fasta_map[name] = os.path.join(genome, name)
-    return fasta_map
+
+class ElandMatches(collections.MutableMapping):
+    def __init__(self, eland_container):
+        # the order in patterns determines the preference for what
+        # will be found.
+        self.eland_container = eland_container
+        MAPPED = eland_container.update_result_with_eland
+        SEQUENCE = eland_container.update_result_with_sequence
+
+        sample = '(?P<sample>[^_]+)'
+        hiIndex = '_(?P<index>(NoIndex|[AGCT])+)'
+        hiLane = '_L(?P<lane>[\d]+)'
+        gaLane = '_(?P<lane>[\d]+)'
+        hiRead = '_R(?P<read>[\d]+)'
+        gaRead = '(_(?P<read>[\d])+)?'
+        part = '_(?P<part>[\d]+)'
+        ext = '(?P<extention>(\.bz2|\.gz)?)'
+
+        hiPrefix = sample + hiIndex + hiLane + hiRead + part
+        gaPrefix = sample + gaLane + gaRead
+        P = collections.namedtuple('Patterns', 'pattern counter priority')
+        self.patterns = [
+            P(hiPrefix +'_export.txt' + ext, MAPPED, 6),
+            P(gaPrefix + '_eland_result.txt' + ext, MAPPED, 5),
+            P(gaPrefix + '_eland_extended.txt' + ext, MAPPED, 4),
+            P(gaPrefix + '_eland_multi.txt' + ext, MAPPED, 3),
+            P(gaPrefix + '_export.txt' + ext, MAPPED, 2),
+            P(gaPrefix + '_sequence.txt' + ext, SEQUENCE, 1),
+            ]
+        self.file_sets = {}
+        self.file_priority = {}
+        self.file_counter = {}
+
+    def add(self, pathname):
+        """Add pathname to our set of files
+        """
+        path, filename = os.path.split(pathname)
+
+        for pattern, counter, priority in self.patterns:
+            rematch = re.match(pattern, filename)
+            if rematch is not None:
+                m = ElandMatch(pathname, counter, **rematch.groupdict())
+                key = m.make_samplekey()
+                old_priority = self.file_priority.get(key, 0)
+                if priority > old_priority:
+                    self.file_sets[key] = set((m,))
+                    self.file_counter[key] = counter
+                    self.file_priority[key] = priority
+                elif priority == old_priority:
+                    self.file_sets[key].add(m)
+
+    def count(self, key, gerald=None, genome_maps=None):
+        #previous sig: gerald, e.results, lane_id, end, pathnames, genome_maps
+        counter = self.file_counter[key]
+        file_set = self.file_sets[key]
+        filenames = [ f.filename for f in file_set ]
+        return counter(gerald, key,
+                       filenames, genome_maps)
+
+    def __iter__(self):
+        return iter(self.file_sets)
+
+    def __len__(self):
+        return len(self.file_sets)
+
+    def __getitem__(self, key):
+        return self.file_sets[key]
+
+    def __setitem__(self, key, value):
+        if not isintance(value, set):
+            raise ValueError("Expected set for value")
+        self.file_sets[key] = value
+
+    def __delitem__(self, key):
+        del self.file_sets[key]
+
+class ElandMatch(object):
+    def __init__(self, pathname, counter,
+                 lane=None, read=None, extension=None,
+                 sample=None, index=None, part=None, **kwargs):
+        self.filename = pathname
+        self.counter = counter
+        self._lane = lane
+        self._read = read
+        self.extension = extension
+        self.sample = sample
+        self.index = index
+        self._part = part
+        LOGGER.info("Found %s: L%s R%s Samp%s" % (
+            self.filename, self._lane, self._read, self.sample))
+
+    def make_samplekey(self):
+        read = self._read if self._read is not None else 1
+        return SampleKey(lane=self.lane, read=read, sample=self.sample)
+
+    def _get_lane(self):
+        if self._lane is not None:
+            return int(self._lane)
+        return self._lane
+    lane = property(_get_lane)
+
+    def _get_read(self):
+        if self._read is not None:
+            return int(self._read)
+        return self._read
+    read = property(_get_read)
+
+    def _get_part(self):
+        if self._part is not None:
+            return int(self._part)
+        return self._part
+    part = property(_get_part)
+
+    def __repr__(self):
+        name = []
+        if self.sample is not None: name.append(self.sample)
+        if self._lane is not None: name.append('L%s' % (self.lane,))
+        if self._read is not None: name.append('R%s' % (self.read,))
+        if self._part is not None: name.append('P%s' % (self.part,))
+        return '<ElandMatch(' + "_".join(name) + ')>'
 
 
 def extract_eland_sequence(instream, outstream, start, end):
@@ -719,12 +891,11 @@ def main(cmdline=None):
     from optparse import OptionParser
     parser = OptionParser("%prog: <gerald dir>+")
     opts, args = parser.parse_args(cmdline)
-    LOGGER.basicConfig(level=logging.DEBUG)
+    logging.basicConfig(level=logging.DEBUG)
     for a in args:
         LOGGER.info("Starting scan of %s" % (a,))
         e = eland(a)
-        print e.get_elements()
-
+        print(ElementTree.tostring(e.get_elements()))
     return