Update issue 120

Moving parsers and serializer implementations into rdflib.plugins package

2 files changed, 62 insertions, 0 deletions

diff --git a/rdflib/query.py b/rdflib/query.py
new file mode 100644
index 00000000..f4b82002
--- /dev/null
+++ b/rdflib/query.py
@@ -0,0 +1,32 @@
+"""
+Query plugin interface.
+
+This module is useful for those wanting to write a query processor
+that can plugin to rdf. If you are wanting to execute a query you
+likely want to do so through the Graph class query method.
+
+"""
+
+
+class Processor(object):
+
+    def __init__(self, graph):
+        pass
+
+    def query(self, strOrQuery, initBindings={}, initNs={}, DEBUG=False):
+        pass
+
+
+class Result(object):
+    """
+    A common class for representing query result in a variety of formats, namely:
+
+    xml   : as an XML string using the XML result format of the query language
+    python: as Python objects
+    json  : as JSON
+    """
+    def __init__(self, pythonResult):
+        self.rt = pythonResult
+
+    def serialize(self, format='xml'):
+        pass
diff --git a/rdflib/serializer.py b/rdflib/serializer.py
new file mode 100644
index 00000000..bf1e9c47
--- /dev/null
+++ b/rdflib/serializer.py
@@ -0,0 +1,30 @@
+"""
+Serializer plugin interface.
+
+This module is useful for those wanting to write a serializer that can
+plugin to rdflib. If you are wanting to invoke a serializer you likely
+want to do so through the Graph class serialize method.
+
+TODO: info for how to write a serializer that can plugin to rdflib. See also rdflib.plugin
+
+"""
+
+from rdflib.term import URIRef
+
+
+class Serializer(object):
+
+    def __init__(self, store):
+        self.store = store
+        self.encoding = "UTF-8"
+        self.base = None
+
+    def serialize(self, stream, base=None, encoding=None, **args):
+        """Abstract method"""
+
+    def relativize(self, uri):
+        base = self.base
+        if base is not None and uri.startswith(base):
+            uri = URIRef(uri.replace(base, "", 1))
+        return uri
+