org.jetbrains.kotlin.diagnostics.rendering.RenderingContext.kt Maven / Gradle / Ivy
/*
* 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.diagnostics.rendering
import org.jetbrains.kotlin.diagnostics.*
// holds data about the parameters of the diagnostic we're about to render
sealed class RenderingContext {
abstract operator fun get(key: Key): T
abstract class Key(val name: String) {
abstract fun compute(objectsToRender: Collection): T
}
class Impl(private val objectsToRender: Collection) : RenderingContext() {
private val data = linkedMapOf, Any?>()
@Suppress("UNCHECKED_CAST")
override fun get(key: Key): T {
return data[key] as? T ?: key.compute(objectsToRender).also { data[key] = it }
}
}
object Empty : RenderingContext() {
override fun get(key: Key): T {
return key.compute(emptyList())
}
}
companion object {
@JvmStatic
fun of(vararg objectsToRender: Any?): RenderingContext {
return Impl(objectsToRender.toList())
}
@JvmStatic
fun fromDiagnostic(d: Diagnostic): RenderingContext {
val parameters = when (d) {
is SimpleDiagnostic<*> -> listOf()
is DiagnosticWithParameters1<*, *> -> listOf(d.a)
is DiagnosticWithParameters2<*, *, *> -> listOf(d.a, d.b)
is DiagnosticWithParameters3<*, *, *, *> -> listOf(d.a, d.b, d.c)
is ParametrizedDiagnostic<*> -> error("Unexpected diagnostic: ${d::class.java}")
else -> listOf()
}
return Impl(parameters)
}
}
}