Design and implement list flyweight using variant, enum and union fields

[izzymoriguchi]

Designed a flyweight class for a list that contains variant, enumand union fields.

Notes

Possible types for list fields that are used in AMQP's protocol.idl are the following:

• variant of following types
  • string, string32
  • uint64, uint32, uint16, uint8, int64
  • array
  • map
  • octets
• Special case of variant where it skips a kind with +
• variant that has consecutive case statements
• typedef
• enum
• union

[codecov[bot]]

Codecov Report

Merging #98 into develop will decrease coverage by 1.07%. The diff coverage is 76.92%.

@@              Coverage Diff              @@
##             develop      #98      +/-   ##
=============================================
- Coverage      78.66%   77.58%   -1.08%     
- Complexity       212      236      +24     
=============================================
  Files             25       30       +5     
  Lines           1139     1392     +253     
  Branches          99      124      +25     
=============================================
+ Hits             896     1080     +184     
- Misses           162      211      +49     
- Partials          81      101      +20

Impacted Files	Coverage Δ	Complexity Δ
...us/maven/plugin/internal/ast/AstUnionCaseNode.java	59.09% <ø> (ø)	4 <0> (ø)	:arrow_down:
...nukleus/maven/plugin/internal/ast/AstEnumNode.java	66.66% <100%> (-1.08%)	5 <2> (ø)
...maven/plugin/internal/ast/visit/StructVisitor.java	93.33% <100%> (ø)	10 <2> (ø)	:arrow_down:
...aktivity/nukleus/maven/plugin/internal/Parser.java	91.93% <100%> (ø)	10 <0> (ø)	:arrow_down:
...ity/nukleus/maven/plugin/internal/ast/AstType.java	94.87% <100%> (+5.12%)	24 <0> (+1)	:arrow_up:
...ity/nukleus/maven/plugin/internal/ast/AstNode.java	98.18% <100%> (+0.3%)	1 <0> (ø)	:arrow_down:
...ukleus/maven/plugin/internal/ast/AstUnionNode.java	63.63% <100%> (-1.59%)	4 <2> (ø)
.../maven/plugin/internal/ast/visit/UnionVisitor.java	50% <100%> (ø)	4 <0> (ø)	:arrow_down:
...ivity/nukleus/maven/plugin/internal/Generator.java	70.88% <100%> (ø)	13 <0> (ø)	:arrow_down:
...ukleus/maven/plugin/internal/ast/AstNamedNode.java	100% <100%> (ø)	2 <2> (?)
... and 17 more

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