org.jetbrains.kotlin.script.scriptAnnotationsPreprocessing.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2017 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.script
import org.jetbrains.kotlin.builtins.DefaultBuiltIns
import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
import org.jetbrains.kotlin.psi.KtAnnotationEntry
import org.jetbrains.kotlin.psi.KtUserType
import org.jetbrains.kotlin.resolve.BindingTraceContext
import org.jetbrains.kotlin.resolve.constants.evaluate.ConstantExpressionEvaluator
import org.jetbrains.kotlin.types.TypeUtils
import kotlin.reflect.KClass
import kotlin.reflect.KParameter
import kotlin.reflect.full.primaryConstructor
internal val KtAnnotationEntry.typeName: String get() = (typeReference?.typeElement as? KtUserType)?.referencedName.orAnonymous()
internal fun String?.orAnonymous(kind: String = ""): String =
this ?: ""
internal fun constructAnnotation(psi: KtAnnotationEntry, targetClass: KClass): Annotation {
val valueArguments = psi.valueArguments.map { arg ->
val evaluator = ConstantExpressionEvaluator(DefaultBuiltIns.Instance, LanguageVersionSettingsImpl.DEFAULT)
val trace = BindingTraceContext()
val result = evaluator.evaluateToConstantValue(arg.getArgumentExpression()!!, trace, TypeUtils.NO_EXPECTED_TYPE)
// TODO: consider inspecting `trace` to find diagnostics reported during the computation (such as division by zero, integer overflow, invalid annotation parameters etc.)
val argName = arg.getArgumentName()?.asName?.toString()
argName to result?.value
}
val mappedArguments: Map =
tryCreateCallableMappingFromNamedArgs(targetClass.constructors.first(), valueArguments)
?: return InvalidScriptResolverAnnotation(psi.typeName, valueArguments)
try {
return targetClass.primaryConstructor!!.callBy(mappedArguments)
}
catch (ex: Exception) {
return InvalidScriptResolverAnnotation(psi.typeName, valueArguments, ex)
}
}
// NOTE: this class is used for error reporting. But in order to pass plugin verification, it should derive directly from java's Annotation
// and implement annotationType method (see #KT-16621 for details).
// TODO: instead of the workaround described above, consider using a sum-type for returning errors from constructAnnotation
@Suppress("PLATFORM_CLASS_MAPPED_TO_KOTLIN")
class InvalidScriptResolverAnnotation(val name: String, val annParams: List>?, val error: Exception? = null) : Annotation, java.lang.annotation.Annotation {
override fun annotationType(): Class = InvalidScriptResolverAnnotation::class.java
}