1 files changed, 107 insertions, 0 deletions
diff --git a/qpid/python/qpid/validator.py b/qpid/python/qpid/validator.py
new file mode 100644
index 0000000000..d234642b3e
--- /dev/null
+++ b/qpid/python/qpid/validator.py
@@ -0,0 +1,107 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+class Context:
+
+  def __init__(self):
+    self.containers = []
+
+  def push(self, o):
+    self.containers.append(o)
+
+  def pop(self):
+    return self.containers.pop()
+
+class Values:
+
+  def __init__(self, *values):
+    self.values = values
+
+  def validate(self, o, ctx):
+    if not o in self.values:
+      return "%s not in %s" % (o, self.values)
+
+  def __str__(self):
+    return self.value
+
+class Types:
+
+  def __init__(self, *types):
+    self.types = types
+
+  def validate(self, o, ctx):
+    for t in self.types:
+      if isinstance(o, t):
+        return
+    if len(self.types) == 1:
+      return "%s is not a %s" % (o, self.types[0].__name__)
+    else:
+      return "%s is not one of: %s" % (o, ", ".join([t.__name__ for t in self.types]))
+
+class List:
+
+  def __init__(self, condition):
+    self.condition = condition
+
+  def validate(self, o, ctx):
+    if not isinstance(o, list):
+      return "%s is not a list" % o
+
+    ctx.push(o)
+    for v in o:
+      err = self.condition.validate(v, ctx)
+      if err: return err
+
+class Map:
+
+  def __init__(self, map, restricted=True):
+    self.map = map
+    self.restricted = restricted
+
+  def validate(self, o, ctx):
+    errors = []
+
+    if not hasattr(o, "get"):
+      return "%s is not a map" % o
+
+    ctx.push(o)
+    for k, t in self.map.items():
+      v = o.get(k)
+      if v is not None:
+        err = t.validate(v, ctx)
+        if err: errors.append("%s: %s" % (k, err))
+    if self.restricted:
+      for k in o:
+        if not k in self.map:
+          errors.append("%s: illegal key" % k)
+    ctx.pop()
+
+    if errors:
+      return ", ".join(errors)
+
+class And:
+
+  def __init__(self, *conditions):
+    self.conditions = conditions
+
+  def validate(self, o, ctx):
+    for c in self.conditions:
+      err = c.validate(o, ctx)
+      if err:
+        return err