1 files changed, 62 insertions, 0 deletions
diff --git a/qtip/loader/base.py b/qtip/loader/base.py
new file mode 100644
index 00000000..f7fcb669
--- /dev/null
+++ b/qtip/loader/base.py
@@ -0,0 +1,62 @@
+##############################################################################
+# Copyright (c) 2016 ZTE Corp and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+from itertools import chain
+from os import listdir
+from os import path
+import yaml
+
+from qtip.base.error import InvalidFormat, NotFound
+from qtip.base.constant import PropName
+
+ROOT_DIR = 'benchmarks'
+
+
+class BaseLoader(object):
+    """Abstract class of QTIP benchmark loader"""
+    DEFAULT_DIR = '.'
+    _paths = [path.join(path.dirname(__file__), path.pardir, path.pardir,
+                        ROOT_DIR)]
+
+    def __init__(self, name, paths=None):
+        self._file = name
+        self._abspath = self._find(name, paths)
+
+        try:
+            content = yaml.safe_load(file(self._abspath))
+        except yaml.YAMLError:
+            # TODO(yujunz) log yaml error
+            raise InvalidFormat(self._abspath)
+
+        self.name = content[PropName.NAME] if PropName.NAME in content \
+            else path.splitext(name)[0]
+        self.content = content
+
+    def _find(self, name, paths):
+        """find a benchmark in searching paths"""
+        paths = self._paths if paths is None else paths
+        name = path.join(self.DEFAULT_DIR, name)
+        for p in paths:
+            abspath = path.join(p, name)
+            if path.exists(abspath):
+                return abspath
+        raise NotFound(name, paths)
+
+    @classmethod
+    def list_all(cls, paths=None):
+        """list all available benchmarks"""
+        paths = cls._paths if paths is None else paths
+        names = chain.from_iterable([listdir(path.join(p, cls.DEFAULT_DIR))
+                                     for p in paths])
+        for name in names:
+            item = cls(name, paths=paths)
+            yield {
+                PropName.NAME: name,
+                PropName.ABSPATH: item._abspath,
+                PropName.CONTENT: item.content}