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Replace reflective constructor invocation with method handle

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Iaroslav Postovalov 2020-12-09 14:43:37 +07:00
parent 95c1504c00
commit 07d6d89192
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1 changed files with 10 additions and 7 deletions
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17
kmath-ast/src/jvmMain/kotlin/kscience/kmath/asm/internal/AsmBuilder.kt
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@ -7,6 +7,8 @@ import org.objectweb.asm.*
import org.objectweb.asm.Opcodes.*
import org.objectweb.asm.Type.*
import org.objectweb.asm.commons.InstructionAdapter
import java.lang.invoke.MethodHandles
import java.lang.invoke.MethodType
import java.util.stream.Collectors.toMap
import kotlin.contracts.InvocationKind
import kotlin.contracts.contract
@ -187,13 +189,14 @@ internal class AsmBuilder<T>(
visitEnd()
}
// java.io.File("dump.class").writeBytes(classWriter.toByteArray())
val cls = classLoader.defineClass(className, classWriter.toByteArray())
val l = MethodHandles.publicLookup()
classLoader
.defineClass(className, classWriter.toByteArray())
.constructors
.first()
.newInstance(*(constants.toTypedArray().wrapToArrayIf { hasConstants })) as Expression<T>
if (hasConstants)
l.findConstructor(cls, MethodType.methodType(Void.TYPE, Array<Any>::class.java))
.invoke(constants.toTypedArray()) as Expression<T>
else
l.findConstructor(cls, MethodType.methodType(Void.TYPE)).invoke() as Expression<T>
}
/**
@ -248,7 +251,7 @@ internal class AsmBuilder<T>(
r.internalName,
"valueOf",
getMethodDescriptor(r, primitive),
false
false,
)
}