org.jetbrains.kotlin.serialization.AnnotationSerializer.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2015 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.serialization

import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.descriptors.annotations.AnnotationArgumentVisitor
import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
import org.jetbrains.kotlin.resolve.constants.*
import org.jetbrains.kotlin.resolve.descriptorUtil.annotationClass
import org.jetbrains.kotlin.serialization.ProtoBuf.Annotation.Argument.Value
import org.jetbrains.kotlin.serialization.ProtoBuf.Annotation.Argument.Value.Type
import org.jetbrains.kotlin.types.ErrorUtils

class AnnotationSerializer(private val stringTable: StringTable) {
    fun serializeAnnotation(annotation: AnnotationDescriptor): ProtoBuf.Annotation = ProtoBuf.Annotation.newBuilder().apply {
        val annotationClass = annotation.annotationClass ?: error("Annotation type is not a class: ${annotation.type}")
        if (ErrorUtils.isError(annotationClass)) {
            error("Unresolved annotation type: ${annotation.type} at ${annotation.source.containingFile}")
        }

        id = stringTable.getFqNameIndex(annotationClass)

        for ((parameter, value) in annotation.allValueArguments) {
            val argument = ProtoBuf.Annotation.Argument.newBuilder()
            argument.nameId = stringTable.getStringIndex(parameter.name.asString())
            argument.setValue(valueProto(value))
            addArgument(argument)
        }
    }.build()

    fun valueProto(constant: ConstantValue<*>): Value.Builder = Value.newBuilder().apply {
        constant.accept(object : AnnotationArgumentVisitor {
            override fun visitAnnotationValue(value: AnnotationValue, data: Unit) {
                type = Type.ANNOTATION
                annotation = serializeAnnotation(value.value)
            }

            override fun visitArrayValue(value: ArrayValue, data: Unit) {
                type = Type.ARRAY
                for (element in value.value) {
                    addArrayElement(valueProto(element).build())
                }
            }

            override fun visitBooleanValue(value: BooleanValue, data: Unit) {
                type = Type.BOOLEAN
                setIntValue(if (value.value) 1 else 0)
            }

            override fun visitByteValue(value: ByteValue, data: Unit) {
                type = Type.BYTE
                intValue = value.value.toLong()
            }

            override fun visitCharValue(value: CharValue, data: Unit) {
                type = Type.CHAR
                intValue = value.value.toLong()
            }

            override fun visitDoubleValue(value: DoubleValue, data: Unit) {
                type = Type.DOUBLE
                doubleValue = value.value
            }

            override fun visitEnumValue(value: EnumValue, data: Unit) {
                type = Type.ENUM
                val enumEntry = value.value
                classId = stringTable.getFqNameIndex(enumEntry.containingDeclaration as ClassDescriptor)
                enumValueId = stringTable.getStringIndex(enumEntry.name.asString())
            }

            override fun visitErrorValue(value: ErrorValue, data: Unit) {
                throw UnsupportedOperationException("Error value: $value")
            }

            override fun visitFloatValue(value: FloatValue, data: Unit) {
                type = Type.FLOAT
                floatValue = value.value
            }

            override fun visitIntValue(value: IntValue, data: Unit) {
                type = Type.INT
                intValue = value.value.toLong()
            }

            override fun visitKClassValue(value: KClassValue?, data: Unit?) {
                // TODO: support class literals
                throw UnsupportedOperationException("Class literal annotation arguments are not yet supported: $value")
            }

            override fun visitLongValue(value: LongValue, data: Unit) {
                type = Type.LONG
                intValue = value.value
            }

            override fun visitNullValue(value: NullValue, data: Unit) {
                throw UnsupportedOperationException("Null should not appear in annotation arguments")
            }

            override fun visitShortValue(value: ShortValue, data: Unit) {
                type = Type.SHORT
                intValue = value.value.toLong()
            }

            override fun visitStringValue(value: StringValue, data: Unit) {
                type = Type.STRING
                stringValue = stringTable.getStringIndex(value.value)
            }
        }, Unit)
    }
}