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author | jsdelfino <jsdelfino@13f79535-47bb-0310-9956-ffa450edef68> | 2013-02-11 05:54:42 +0000 |
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committer | jsdelfino <jsdelfino@13f79535-47bb-0310-9956-ffa450edef68> | 2013-02-11 05:54:42 +0000 |
commit | 3a8da3c1855663909d61c79aeb28ce04118d1d6f (patch) | |
tree | 81ae7637d3b3a24348f58392b5cdcd9d5101c5b7 /sca-cpp/trunk/components/logic/nuvem/select.py | |
parent | 4951c1b04bf66f81cf648b76af3795245d56381a (diff) |
Add nuvem components.
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1444662 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sca-cpp/trunk/components/logic/nuvem/select.py')
-rw-r--r-- | sca-cpp/trunk/components/logic/nuvem/select.py | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sca-cpp/trunk/components/logic/nuvem/select.py b/sca-cpp/trunk/components/logic/nuvem/select.py new file mode 100644 index 0000000000..bf10a756a4 --- /dev/null +++ b/sca-cpp/trunk/components/logic/nuvem/select.py @@ -0,0 +1,72 @@ +# 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. + +# Return a list of name value pairs that match a name +# Search through nested lists of name value pairs +def get(r, p, l): + def isList(v): + if getattr(v, '__iter__', False) == False: + return False + if isinstance(v, basestring) or isinstance(v, dict): + return False + return True + + def isAssoc(v): + return isList(v) and len(v) >= 2 and isinstance(v[0], basestring) and v[0][0:1] == "'" + + def lookup(pv, lv): + if lv == (): + return () + if isAssoc(lv): + lv = (lv,) + + # Check if list element is a name value pair assoc + a = lv[0] + if not isAssoc(a): + # Lookup children if any and rest of list + if isList(a): + return lookup(pv, a) + lookup(pv, lv[1:]) + return lookup(pv, lv[1:]) + + # Path segment match + an = "'" + a[0][2:] if a[0][0:2] == "'@" else a[0] + if an == pv[0]: + # Found leaf, return it and lookup rest of the list + if len(pv) == 1: + return (a,) + lookup(pv, lv[1:]) + # Continue to lookup children if any plus rest of the list + return lookup(pv[1:], a[1:]) + lookup(pv, lv[1:]) + + # No match, lookup any children and rest of the list + if (isList(a[1])): + return lookup(pv, a[1]) + lookup(pv, a[2:]) + lookup(pv, lv[1:]) + return lookup(pv, a[2:]) + lookup(pv, lv[1:]) + + def qsymbol(x): + if not isinstance(x, basestring): + return x + return x if x[0:1] == "'" else "'" + x + + # Support path as a list or a dot separated string + lv = l.get(r) + pv = p.get(r) + if (isList(pv)): + return lookup(map(qsymbol, pv), () if lv is None else lv) + + spv = map(qsymbol, qsymbol(pv)[1:].split('.')) + return lookup(spv, () if lv is None else lv) + |