commonMain.com.shakelang.util.jvmlib.infos.constants.ConstantFieldrefInfo.kt Maven / Gradle / Ivy

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package com.shakelang.util.jvmlib.infos.constants

import com.shakelang.util.io.streaming.input.DataInputStream
import com.shakelang.util.io.streaming.input.InputStream
import com.shakelang.util.io.streaming.input.dataStream
import com.shakelang.util.io.streaming.output.DataOutputStream

class ConstantFieldrefInfo(private val cri: UShort, val ntri: UShort) : ConstantInfo(), ConstantUser {

    lateinit var classRef: ConstantClassInfo
    lateinit var nameTypeRef: ConstantNameAndTypeInfo

    val classRefIndex: UShort get() = classRef.index
    val nameTypeRefIndex: UShort get() = nameTypeRef.index

    override val uses: Array get() = arrayOf(classRef, nameTypeRef)

    override val tag: Byte get() = ConstantFieldrefInfo.tag
    override val tagName: String get() = name
    override fun toJson() = super.toJson()
        .with("class_ref", classRefIndex.toInt())
        .with("name_type_ref", nameTypeRefIndex.toInt())

    override fun init(pool: ConstantPool) {
        super.init(pool)
        classRef = pool.getClass(cri)
        nameTypeRef = pool.getNameAndType(ntri)
    }

    override fun dump(out: DataOutputStream) {
        out.writeByte(tag)
        out.writeUnsignedShort(classRefIndex)
        out.writeUnsignedShort(nameTypeRefIndex)
    }

    companion object {
        fun contentsFromStream(stream: DataInputStream): ConstantFieldrefInfo {
            val classRef = stream.readUnsignedShort()
            val nameTypeRef = stream.readUnsignedShort()
            return ConstantFieldrefInfo(classRef, nameTypeRef)
        }

        fun contentsFromStream(stream: InputStream) = contentsFromStream(stream.dataStream)

        fun fromStream(stream: DataInputStream) =
            if (stream.readByte() != tag) {
                throw IllegalArgumentException("Invalid tag for ConstantFieldrefInfo")
            } else {
                contentsFromStream(stream)
            }

        fun fromStream(stream: InputStream) = fromStream(stream.dataStream)

        fun contentsFromBytes(bytes: ByteArray) = contentsFromStream(bytes.dataStream())

        fun fromBytes(bytes: ByteArray) = fromStream(bytes.dataStream())

        const val name = "constant_fieldref_info"
        const val tag = ConstantTags.CONSTANT_FIELD_REF
    }
}