tscfg.DefineCase.scala Maven / Gradle / Ivy
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package tscfg
import tscfg.exceptions.ObjectDefinitionException
sealed abstract class DefineCase {
val isAbstract: Boolean = false
val isEnum: Boolean = false
val isExternal: Boolean = false
}
object DefineCase {
case object SimpleDefineCase extends DefineCase
case object AbstractDefineCase extends DefineCase {
override val isAbstract: Boolean = true
}
case class ExtendsDefineCase(abs: Boolean, nameGiven: String)
extends DefineCase {
override val isExternal: Boolean = nameGiven.startsWith("!")
val name: String = if (isExternal) nameGiven.substring(1) else nameGiven
override val isAbstract: Boolean = abs
}
case class ImplementsDefineCase(abs: Boolean, nameGiven: String)
extends DefineCase {
override val isExternal: Boolean = nameGiven.startsWith("!")
val name: String = if (isExternal) nameGiven.substring(1) else nameGiven
override val isAbstract: Boolean = abs
}
case object EnumDefineCase extends DefineCase {
override val isEnum: Boolean = true
}
/** Extracts the shared objects' additional information given by a preceding
* comment string. If the string does not start with '@define' (it is no
* shared object), [[None]] is returned.
*
* @param commentString
* Comment String to parse for additional information
* @throws ObjectDefinitionException
* If the comment string is malformed
* @return
* An [[Option]] on additional information of the shared object
*/
def getDefineCase(commentString: String): Option[DefineCase] = {
val str = commentString.trim
val tokens = str.split("\\s+", Int.MaxValue).toList
val res = tokens match {
case "@define" :: "abstract" :: Nil =>
Some(AbstractDefineCase)
case "@define" :: "abstract" :: "extends" :: name :: Nil =>
Some(ExtendsDefineCase(abs = true, name))
case "@define" :: "extends" :: name :: Nil =>
Some(ExtendsDefineCase(abs = false, name))
case "@define" :: "extends" :: Nil =>
throw ObjectDefinitionException(
s"Missing name after `extends`: '$commentString'"
)
case "@define" :: "abstract" :: "implements" :: name :: Nil =>
Some(ImplementsDefineCase(abs = true, name))
case "@define" :: "implements" :: name :: Nil =>
Some(ImplementsDefineCase(abs = false, name))
case "@define" :: "implements" :: Nil =>
throw ObjectDefinitionException(
s"Missing name after `implements`: '$commentString'"
)
case "@define" :: "enum" :: Nil =>
Some(EnumDefineCase)
case "@define" :: Nil =>
Some(SimpleDefineCase)
case "@define" :: _ =>
throw ObjectDefinitionException(s"Unrecognized @define construct: $str")
case _ =>
None
}
scribe.debug(s"getDefineCase: commentString='$commentString' => $res")
res
}
}