Reduce generated code required to access a parameter's value
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Key: DERBY-739
URL: http://issues.apache.org/jira/browse/DERBY-739
Project: Derby
Type: Sub-task
Reporter: Daniel John Debrunner
Priority: Minor
When accessing a parameter the generated code is:
this.pvs.getParameter(23);
A slightly shorter form would be
this.getParameter(23);
if a getParameter() method was added to BaseActivation that simply did:
protected final DataValueDescriptor getParameter(int n) { return
pvs.getParameter(n); }
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An interesting separate idea, to reduce the number of constant pool entries
would be to have multiple getParameter() methods, that took values from 0-5 to
construct the actual parameter number.
getParameter(3) -- > 3 parameter (0 based)
getParameter(2, 1) --> 13 parameter (2*6 + 1)
getParameter(5, 1, 4) --> 190 parameter (5*36 + 1*6+ 4)
above the limit of three args, revert to getParameter(n)
This should probably be a separate issue and probably would increease code size
which would not help DERBY-732 , it's a tradeoff between constant pool entries
and code size.
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