1 files changed, 107 insertions, 0 deletions
diff --git a/util/local_database/xpathlite.py b/util/local_database/xpathlite.py
new file mode 100644
index 0000000..6e4dd71
--- /dev/null
+++ b/util/local_database/xpathlite.py
@@ -0,0 +1,107 @@
+import sys
+import os
+import xml.dom.minidom
+
+doc_cache = {}
+
+class DraftResolution:
+    # See http://www.unicode.org/cldr/process.html for description
+    unconfirmed = 'unconfirmed'
+    provisional = 'provisional'
+    contributed = 'contributed'
+    approved = 'approved'
+
+
+def findChild(parent, tag_name, arg_value, draft=None):
+    for node in parent.childNodes:
+        if node.nodeType != node.ELEMENT_NODE:
+            continue
+        if node.nodeName != tag_name:
+            continue
+        if arg_value:
+            if not node.attributes.has_key('type'):
+                continue
+            if node.attributes['type'].nodeValue != arg_value:
+                continue
+        if draft:
+            if node.attributes.has_key('draft'):
+                if node.attributes['draft'].nodeValue != draft:
+                    continue
+            elif draft != DraftResolution.approved:
+                continue
+        return node
+    return False
+
+def _findEntry(file, path, draft=None):
+    doc = False
+    if doc_cache.has_key(file):
+        doc = doc_cache[file]
+    else:
+        doc = xml.dom.minidom.parse(file)
+        doc_cache[file] = doc
+
+    elt = doc.documentElement
+    tag_spec_list = path.split("/")
+    last_entry = None
+    if draft is not None:
+        last_entry = tag_spec_list[-1]
+        tag_spec_list = tag_spec_list[:-1]
+    for tag_spec in tag_spec_list:
+        tag_name = tag_spec
+        arg_value = ''
+        left_bracket = tag_spec.find('[')
+        if left_bracket != -1:
+            tag_name = tag_spec[:left_bracket]
+            arg_value = tag_spec[left_bracket+1:-1]
+        elt = findChild(elt, tag_name, arg_value)
+        if not elt:
+            return ""
+    if last_entry is not None:
+        elt = findChild(elt, last_entry, '', draft)
+        if not elt:
+            return ""
+    return elt.firstChild.nodeValue
+
+def findAlias(file):
+    doc = doc_cache[file]
+    alias_elt = findChild(doc.documentElement, "alias", "")
+    if not alias_elt:
+        return False
+    if not alias_elt.attributes.has_key('source'):
+        return False
+    return alias_elt.attributes['source'].nodeValue
+
+def findEntry(base, path, draft=None):
+    file = base + ".xml"
+
+    if os.path.isfile(file):
+        result = _findEntry(file, path, draft)
+        if result:
+            return result
+
+        alias = findAlias(file)
+        if alias:
+            file = os.path.dirname(base) + "/" + alias + ".xml"
+            if os.path.isfile(file):
+                result = _findEntry(file, path, draft)
+                if result:
+                    return result
+
+    file = base[:-3] + ".xml"
+    if os.path.isfile(file):
+        result = _findEntry(file, path, draft)
+        if result:
+            return result
+        alias = findAlias(file)
+        if alias:
+            file = os.path.dirname(base) + "/" + alias + ".xml"
+            if os.path.isfile(file):
+                result = _findEntry(file, path, draft)
+                if result:
+                    return result
+
+    if not draft:
+        file = os.path.dirname(base) + "/root.xml"
+        result = _findEntry(file, path, draft)
+    return result
+