Pavel Klinov created TINKERPOP3-848:
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Summary: Support default attribute values in GraphMLReader
Key: TINKERPOP3-848
URL: https://issues.apache.org/jira/browse/TINKERPOP3-848
Project: TinkerPop 3
Issue Type: Improvement
Components: io
Affects Versions: 3.0.1-incubating
Environment: All
Reporter: Pavel Klinov
Assignee: stephen mallette
Priority: Minor
Looking at the code of GraphMLReader I see that it doesn't support default
values of attributes, which are allowed by the GraphML spec. This is a bit
annoying especially if the input defines default values for attributes which
are used for mandatory data, e.g. edge labels.
One small example is the sample graph at [1]. "d_e" is the label attribute with
a default value. There're <edge .. /> elements w/o body later in the document
and reading those will throw a "java.lang.IllegalArgumentException: Label can
not be null" exception (if the vendor considers edge labels mandatory).
I'd personaly squash both keyIdMap and keyTypesMap into a single String ->
AttrInfo map, where AttrInfo would contain information about the data attribute
name, type, and the default value.
[1] http://www.eecs.wsu.edu/~yyao/DirectedStudyI/Datasets/AS/sample.graphml
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