41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
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"""
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Iterative forms of operations
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"""
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from shapely.topology import Delegating
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class IterOp(Delegating):
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"""A generating non-data descriptor.
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"""
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def __call__(self, context, iterator, value=True):
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if context._geom is None:
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raise ValueError("Null geometry supports no operations")
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for item in iterator:
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try:
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this_geom, ob = item
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except TypeError:
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this_geom = item
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ob = this_geom
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if not this_geom._geom:
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raise ValueError("Null geometry supports no operations")
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try:
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retval = self.fn(context._geom, this_geom._geom)
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except Exception as err:
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self._check_topology(err, context, this_geom)
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if bool(retval) == value:
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yield ob
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# utilities
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disjoint = IterOp('disjoint')
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touches = IterOp('touches')
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intersects = IterOp('intersects')
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crosses = IterOp('crosses')
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within = IterOp('within')
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contains = IterOp('contains')
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overlaps = IterOp('overlaps')
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equals = IterOp('equals')
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