1 files changed, 60 insertions, 0 deletions
diff --git a/src/buildstream/_loader/metaelement.py b/src/buildstream/_loader/metaelement.py
new file mode 100644
index 000000000..45eb6f4d0
--- /dev/null
+++ b/src/buildstream/_loader/metaelement.py
@@ -0,0 +1,60 @@
+#
+#  Copyright (C) 2016 Codethink Limited
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU Lesser General Public
+#  License as published by the Free Software Foundation; either
+#  version 2 of the License, or (at your option) any later version.
+#
+#  This library is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public
+#  License along with this library. If not, see <http://www.gnu.org/licenses/>.
+#
+#  Authors:
+#        Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
+
+from .. import _yaml
+
+
+class MetaElement():
+
+    # MetaElement()
+    #
+    # An abstract object holding data suitable for constructing an Element
+    #
+    # Args:
+    #    project: The project that contains the element
+    #    name: The resolved element name
+    #    kind: The element kind
+    #    provenance: The provenance of the element
+    #    sources: An array of MetaSource objects
+    #    config: The configuration data for the element
+    #    variables: The variables declared or overridden on this element
+    #    environment: The environment variables declared or overridden on this element
+    #    env_nocache: List of environment vars which should not be considered in cache keys
+    #    public: Public domain data dictionary
+    #    sandbox: Configuration specific to the sandbox environment
+    #    first_pass: The element is to be loaded with first pass configuration (junction)
+    #
+    def __init__(self, project, name, kind=None, provenance=None, sources=None, config=None,
+                 variables=None, environment=None, env_nocache=None, public=None,
+                 sandbox=None, first_pass=False):
+        self.project = project
+        self.name = name
+        self.kind = kind
+        self.provenance = provenance
+        self.sources = sources
+        self.config = config or _yaml.new_empty_node()
+        self.variables = variables or _yaml.new_empty_node()
+        self.environment = environment or _yaml.new_empty_node()
+        self.env_nocache = env_nocache or []
+        self.public = public or _yaml.new_empty_node()
+        self.sandbox = sandbox or _yaml.new_empty_node()
+        self.build_dependencies = []
+        self.dependencies = []
+        self.first_pass = first_pass
+        self.is_junction = kind == "junction"