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[graph] add 'isLink' helper method

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evaluates if the given value matches the link expression pattern
This commit is contained in:
Yann Lanthony 2018-02-12 17:58:47 +01:00
parent ad98d70bfe
commit 39abaf657a
1 changed files with 11 additions and 2 deletions
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13
meshroom/core/graph.py
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@ -51,6 +51,15 @@ else:
stringIsLinkRe = re.compile('^\{[A-Za-z]+[A-Za-z0-9_.]*\}$')
def isLink(value):
"""
Return whether the given argument is a link expression.
A link expression is a string matching the {nodeName.attrName} pattern.
"""
return isinstance(value, basestring) and stringIsLinkRe.match(value)
def isCollection(v):
return isinstance(v, collections.Iterable) and not isinstance(v, basestring)
@ -170,7 +179,7 @@ class Attribute(BaseObject):
if self._value == value:
return
if isinstance(value, Attribute) or (isinstance(value, basestring) and stringIsLinkRe.match(value)):
if isinstance(value, Attribute) or (isinstance(value, basestring) and isLink(value)):
# if we set a link to another attribute
self._value = value
else:
@ -236,7 +245,7 @@ class Attribute(BaseObject):
if isinstance(v, Attribute):
g.addEdge(v, self)
self._value = ""
elif self.isInput and isinstance(v, basestring) and stringIsLinkRe.match(v):
elif self.isInput and isinstance(v, basestring) and isLink(v):
# value is a link to another attribute
link = v[1:-1]
linkNode, linkAttr = link.split('.')