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package org.jetbrains.dokka
import org.jetbrains.dokka.DocumentationNode.*
/**
* Implements [LanguageService] and provides rendering of symbols in Java language
*/
public class JavaLanguageService : LanguageService {
override fun render(node: DocumentationNode): ContentNode {
return ContentText(when (node.kind) {
Kind.Package -> renderPackage(node)
Kind.Class,
Kind.Interface,
Kind.Enum,
Kind.EnumItem,
Kind.Object -> renderClass(node)
Kind.TypeParameter -> renderTypeParameter(node)
Kind.Type,
Kind.UpperBound -> renderType(node)
Kind.Constructor,
Kind.Function -> renderFunction(node)
Kind.Property -> renderProperty(node)
else -> "${node.kind}: ${node.name}"
})
}
override fun renderName(node: DocumentationNode): String {
return when (node.kind) {
Kind.Constructor -> node.owner!!.name
else -> node.name
}
}
private fun renderPackage(node: DocumentationNode): String {
return "package ${node.name}"
}
private fun renderModifier(node: DocumentationNode): String {
return when (node.name) {
"open" -> ""
"internal" -> ""
else -> node.name
}
}
private fun renderType(node: DocumentationNode): String {
return when (node.name) {
"Unit" -> "void"
"Int" -> "int"
"Long" -> "long"
"Double" -> "double"
"Float" -> "float"
"Char" -> "char"
"Boolean" -> "bool"
// TODO: render arrays
else -> node.name
}
}
private fun renderTypeParameter(node: DocumentationNode): String {
val constraints = node.details(Kind.UpperBound)
return if (constraints.none())
node.name
else {
node.name + " extends " + constraints.map { renderType(node) }.join()
}
}
private fun renderParameter(node: DocumentationNode): String {
return "${renderType(node.detail(Kind.Type))} ${node.name}"
}
private fun renderTypeParametersForNode(node: DocumentationNode): String {
return StringBuilder {
val typeParameters = node.details(Kind.TypeParameter)
if (typeParameters.any()) {
append("<")
append(typeParameters.map { renderTypeParameter(it) }.join())
append("> ")
}
}.toString()
}
private fun renderModifiersForNode(node: DocumentationNode): String {
val modifiers = node.details(Kind.Modifier).map { renderModifier(it) }.filter { it != "" }
if (modifiers.none())
return ""
return modifiers.join(" ", postfix = " ")
}
private fun renderClass(node: DocumentationNode): String {
return StringBuilder {
when (node.kind) {
Kind.Class -> append("class ")
Kind.Interface -> append("interface ")
Kind.Enum -> append("enum ")
Kind.EnumItem -> append("enum value ")
Kind.Object -> append("class ")
else -> throw IllegalArgumentException("Node $node is not a class-like object")
}
append(node.name)
append(renderTypeParametersForNode(node))
}.toString()
}
private fun renderFunction(node: DocumentationNode): String {
return StringBuilder {
when (node.kind) {
Kind.Constructor -> append(node.owner?.name)
Kind.Function -> {
append(renderTypeParametersForNode(node))
append(renderType(node.detail(Kind.Type)))
append(" ")
append(node.name)
}
else -> throw IllegalArgumentException("Node $node is not a function-like object")
}
val receiver = node.details(Kind.Receiver).singleOrNull()
append("(")
if (receiver != null)
append((listOf(receiver) + node.details(Kind.Parameter)).map { renderParameter(it) }.join())
else
append(node.details(Kind.Parameter).map { renderParameter(it) }.join())
append(")")
}.toString()
}
private fun renderProperty(node: DocumentationNode): String {
return StringBuilder {
when (node.kind) {
Kind.Property -> append("val ")
else -> throw IllegalArgumentException("Node $node is not a property")
}
append(renderTypeParametersForNode(node))
val receiver = node.details(Kind.Receiver).singleOrNull()
if (receiver != null) {
append(renderType(receiver.detail(Kind.Type)))
append(".")
}
append(node.name)
append(": ")
append(renderType(node.detail(Kind.Type)))
}.toString()
}
}
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