RFR: 8287064: Modernize ProxyGenerator.PrimitiveTypeInfo [v2]

[liach]

On Tue, 24 May 2022 17:26:52 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> Did you consider switch (class) {...} in PrimitiveTypeInfo.get?

I don't think we can switch on class instances yet. Even with preview enabled, best I can get is (for type incompatibility of `Class<?>` and `Class<Integer>`, etc.)

		return switch (cl) {
		    case Class<?> e && e == int.class -> 1;
		    case Class<?> e && e == long.class -> 2;
		    case Class<?> e && e == boolean.class -> 3;
		    case Class<?> e && e == short.class -> 4;
		    case Class<?> e && e == byte.class -> 5;
		    case Class<?> e && e == char.class -> 6;
		    case Class<?> e && e == float.class -> 7;
		    case Class<?> e && e == double.class -> 8;
		    default -> 0;
		};

to avoid type incompatibility; this is in turn implemented by a bootstrap method and a loop, which is of course obviously much slower.

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PR: https://git.openjdk.java.net/jdk/pull/8801