org.jetbrains.kotlin.load.java.components.JavaPropertyInitializerEvaluatorImpl.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2016 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.load.java.components

import org.jetbrains.kotlin.descriptors.PropertyDescriptor
import org.jetbrains.kotlin.load.java.structure.JavaField
import org.jetbrains.kotlin.resolve.constants.ConstantValue
import org.jetbrains.kotlin.resolve.constants.ConstantValueFactory
import org.jetbrains.kotlin.types.KotlinType

object JavaPropertyInitializerEvaluatorImpl : JavaPropertyInitializerEvaluator {
    override fun getInitializerConstant(field: JavaField, descriptor: PropertyDescriptor): ConstantValue<*>? =
        field.initializerValue?.let { value -> convertLiteralValue(value, descriptor.type) }

    internal fun convertLiteralValue(value: Any, expectedType: KotlinType): ConstantValue<*>? =
        when (value) {
            // Note: `value` expression may be of class that does not match field type in some cases
            // tested for Int, left other checks just in case
            is Byte, is Short, is Int, is Long -> {
                ConstantValueFactory.createIntegerConstantValue((value as Number).toLong(), expectedType, false)
            }
            else -> {
                ConstantValueFactory.createConstantValue(value)
            }
        }
}