org.jetbrains.kotlinx.jupyter.libraries.ChainedLibraryResolver.kt Maven / Gradle / Ivy

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Implementation of REPL compiler and preprocessor for Jupyter dialect of Kotlin (IDE-compatible)

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package org.jetbrains.kotlinx.jupyter.libraries

import org.jetbrains.kotlinx.jupyter.api.libraries.LibraryDefinition
import org.jetbrains.kotlinx.jupyter.api.libraries.LibraryReference
import org.jetbrains.kotlinx.jupyter.api.libraries.Variable

abstract class ChainedLibraryResolver(private val parent: LibraryResolver? = null) : LibraryResolver {
    protected abstract fun tryResolve(reference: LibraryReference, arguments: List): LibraryDefinition?
    protected open fun save(reference: LibraryReference, definition: LibraryDefinition) {}
    protected open fun shouldResolve(reference: LibraryReference): Boolean = true

    override fun resolve(reference: LibraryReference, arguments: List): LibraryDefinition? {
        val shouldBeResolved = shouldResolve(reference)
        if (shouldBeResolved) {
            val result = tryResolve(reference, arguments)
            if (result != null) return result
        }

        val parentResult = parent?.resolve(reference, arguments) ?: return null
        if (shouldBeResolved) {
            save(reference, parentResult)
        }

        return parentResult
    }
}