--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GSV.py	Fri Jun 05 11:40:49 2015 -0400
@@ -0,0 +1,66 @@
+
+"""
+GSV visualisation datatypes
+"""
+
+
+import logging, os, os.path, sys, time, tempfile, shutil, string, glob, re
+
+from galaxy.datatypes.sniff import *
+from galaxy.datatypes import data
+from galaxy.datatypes.metadata import MetadataElement
+from galaxy.datatypes.xml import GenericXml
+
+log = logging.getLogger(__name__)
+
+class GenericMapJson( data.Text ):
+    """Base format class for any JSON file."""
+    file_ext = "mapjson"
+
+    def set_peek( self, dataset, is_multi_byte=False ):
+        """Set the peek and blurb text"""
+        if not dataset.dataset.purged:
+            dataset.peek = data.get_file_peek( dataset.file_name, is_multi_byte=is_multi_byte )
+            dataset.blurb = 'Mapjson data'
+        else:
+            dataset.peek = 'file does not exist'
+            dataset.blurb = 'file purged from disk'
+
+    def sniff( self, filename ):
+        """
+	Determines whether the file is JSON or not
+
+        >>> fname = get_test_fname( 'megablast_xml_parser_test1.blastxml' )
+        >>> GenericMapJson().sniff( fname )
+        True
+	>>> fname = get_test_fname( 'interval.interval' )
+        >>> GenericMapJson().sniff( fname )
+        False
+	"""
+	#TODO - Use a context manager on Python 2.5+ to close handle
+        handle = open(filename)
+        line = handle.readline()
+        handle.close()
+
+
+class Gjson( GenericMapJson ):
+    """
+    Resource Description Framework format (http://www.w3.org/RDF/).
+    """
+    file_ext = "gjson"
+
+    def sniff( self, filename ):
+        """
+	Returns false and the user must manually set.
+        """
+        return False
+
+    def set_peek( self, dataset, is_multi_byte=False ):
+        """Set the peek and blurb text"""
+        if not dataset.dataset.purged:
+            dataset.peek = data.get_file_peek( dataset.file_name, is_multi_byte=is_multi_byte )
+            dataset.blurb = 'GJSON data'
+        else:
+            dataset.peek = 'file does not exist'
+            dataset.blurb = 'file purged from disk'
+