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Merge pull request #14 from ProjectMapK/fix-to-use-metadata-jvm
Fix to use metadata jvm
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81 changes: 81 additions & 0 deletions
81
...asterxml/jackson/module/kotlin/deser/value_instantiator/argument_bucket/ArgumentBucket.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| package com.fasterxml.jackson.module.kotlin.deser.value_instantiator.argument_bucket | ||
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| import java.lang.reflect.Array as ReflectArray | ||
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| private fun defaultPrimitiveValue(type: Class<*>): Any = when (type) { | ||
| Boolean::class.java -> false | ||
| Char::class.java -> 0.toChar() | ||
| Byte::class.java -> 0.toByte() | ||
| Short::class.java -> 0.toShort() | ||
| Int::class.java -> 0 | ||
| Float::class.java -> 0f | ||
| Long::class.java -> 0L | ||
| Double::class.java -> 0.0 | ||
| Void.TYPE -> throw IllegalStateException("Parameter with void type is illegal") | ||
| else -> throw UnsupportedOperationException("Unknown primitive: $type") | ||
| } | ||
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| private fun defaultEmptyArray(arrayType: Class<*>): Any = | ||
| ReflectArray.newInstance(arrayType.componentType, 0) | ||
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| // @see https://github.com/JetBrains/kotlin/blob/4c925d05883a8073e6732bca95bf575beb031a59/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KCallableImpl.kt#L114 | ||
| internal class BucketGenerator( | ||
| parameterTypes: List<Class<*>>, | ||
| hasVarargParam: Boolean | ||
| ) { | ||
| private val valueParameterSize: Int = parameterTypes.size | ||
| private val originalAbsentArgs: Array<Any?> | ||
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| init { | ||
| val maskSize = (parameterTypes.size + Integer.SIZE - 1) / Integer.SIZE | ||
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| // Array containing the actual function arguments, masks, and +1 for DefaultConstructorMarker or MethodHandle. | ||
| originalAbsentArgs = arrayOfNulls<Any?>(valueParameterSize + maskSize + 1) | ||
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| // Set values of primitive arguments to the boxed default values (such as 0, 0.0, false) instead of nulls. | ||
| parameterTypes.forEachIndexed { i, clazz -> | ||
| if (clazz.isPrimitive) { | ||
| originalAbsentArgs[i] = defaultPrimitiveValue(clazz) | ||
| } | ||
| } | ||
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| if (hasVarargParam) { | ||
| // vararg argument is always at the end of the arguments. | ||
| val i = valueParameterSize - 1 | ||
| originalAbsentArgs[i] = defaultEmptyArray(parameterTypes[i]) | ||
| } | ||
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| for (i in 0 until maskSize) { | ||
| originalAbsentArgs[valueParameterSize + i] = -1 | ||
| } | ||
| } | ||
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| fun generate(): ArgumentBucket = ArgumentBucket(valueParameterSize, originalAbsentArgs.clone()) | ||
| } | ||
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| internal class ArgumentBucket( | ||
| private val valueParameterSize: Int, | ||
| private val arguments: Array<Any?> | ||
| ) { | ||
| companion object { | ||
| // List of Int with only 1 bit enabled. | ||
| private val BIT_FLAGS: List<Int> = IntArray(Int.SIZE_BITS) { (1 shl it).inv() }.asList() | ||
| } | ||
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| private var count = 0 | ||
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| operator fun set(index: Int, arg: Any?) { | ||
| // Since there is no multiple initialization in the use case, the key check is omitted. | ||
| arguments[index] = arg | ||
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| val maskIndex = valueParameterSize + (index / Integer.SIZE) | ||
| arguments[maskIndex] = (arguments[maskIndex] as Int) and BIT_FLAGS[index % Integer.SIZE] | ||
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| count++ | ||
| } | ||
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| val isFullInitialized: Boolean get() = count == valueParameterSize | ||
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| fun getArgs(): Array<Any?> = arguments.copyOf(valueParameterSize) | ||
| fun getDefaultArgs(): Array<Any?> = arguments | ||
| } |
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