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The jnlp specification (https://docs.oracle.com/javase/7/docs/technotes/guides/javaws/developersguide/syntax.html) allows for multiple `java`/`j2se` in one resource. The existing model of the Resource struct allowed for zero or one, not zero to *. This leads to some odd behaviour when encountering multiple j2se properties. In particular, it seemed to merge the fields together, with the last winning. The net result (in the case I ran into) was that java VM arguments only available in 1.9+ were applied to a 1.8 VM, which lead to it failing to start. This changes the Resource model to accept an arbitrary number of J2SE/Java properties. Further, it maintains the existing J2SE() semantic of returning exactly one for a given resource by choosing the first property which matches the java version, in line with the jnlp spec which indicates a first-match semantic.
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The jnlp specification
(https://docs.oracle.com/javase/7/docs/technotes/guides/javaws/developersguide/syntax.html)
allows for multiple
java/j2sein one resource. The existing model ofthe Resource struct allowed for zero or one, not zero to *. This leads
to some odd behaviour when encountering multiple j2se properties. In
particular, it seemed to merge the fields together, with the last
winning. The net result (in the case I ran into) was that java VM
arguments only available in 1.9+ were applied to a 1.8 VM, which lead to
it failing to start.
This changes the Resource model to accept an arbitrary number of
J2SE/Java properties. Further, it maintains the existing J2SE() semantic
of returning exactly one for a given resource by choosing the first
property which matches the java version, in line with the jnlp spec
which indicates a first-match semantic.