blob: 5005ccb0610da5e17e21dc249d059b6b1727b92f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
package firrtl
package annotations
import scala.util.Try
import org.json4s._
import org.json4s.native.JsonMethods._
import org.json4s.native.Serialization
import org.json4s.native.Serialization.{read, write, writePretty}
import firrtl.ir._
import firrtl.Utils.error
object JsonProtocol {
// Helper for error messages
private def prettifyJsonInput(in: JsonInput): String = {
def defaultToString(base: String, obj: Any): String = s"$base@${obj.hashCode.toHexString}"
in match {
case FileInput(file) => file.toString
case StringInput(o) => defaultToString("String", o)
case ReaderInput(o) => defaultToString("Reader", o)
case StreamInput(o) => defaultToString("Stream", o)
}
}
class TransformClassSerializer extends CustomSerializer[Class[_ <: Transform]](format => (
{ case JString(s) => Class.forName(s).asInstanceOf[Class[_ <: Transform]] },
{ case x: Class[_] => JString(x.getName) }
))
// TODO Reduce boilerplate?
class NamedSerializer extends CustomSerializer[Named](format => (
{ case JString(s) => AnnotationUtils.toNamed(s) },
{ case named: Named => JString(named.serialize) }
))
class CircuitNameSerializer extends CustomSerializer[CircuitName](format => (
{ case JString(s) => AnnotationUtils.toNamed(s).asInstanceOf[CircuitName] },
{ case named: CircuitName => JString(named.serialize) }
))
class ModuleNameSerializer extends CustomSerializer[ModuleName](format => (
{ case JString(s) => AnnotationUtils.toNamed(s).asInstanceOf[ModuleName] },
{ case named: ModuleName => JString(named.serialize) }
))
class ComponentNameSerializer extends CustomSerializer[ComponentName](format => (
{ case JString(s) => AnnotationUtils.toNamed(s).asInstanceOf[ComponentName] },
{ case named: ComponentName => JString(named.serialize) }
))
/** Construct Json formatter for annotations */
def jsonFormat(tags: Seq[Class[_ <: Annotation]]) = {
Serialization.formats(FullTypeHints(tags.toList)).withTypeHintFieldName("class") +
new TransformClassSerializer + new NamedSerializer + new CircuitNameSerializer +
new ModuleNameSerializer + new ComponentNameSerializer
}
/** Serialize annotations to a String for emission */
def serialize(annos: Seq[Annotation]): String = serializeTry(annos).get
def serializeTry(annos: Seq[Annotation]): Try[String] = {
val tags = annos.map(_.getClass).distinct
implicit val formats = jsonFormat(tags)
Try(writePretty(annos))
}
def deserialize(in: JsonInput): Seq[Annotation] = deserializeTry(in).get
def deserializeTry(in: JsonInput): Try[Seq[Annotation]] = Try({
def throwError() = throw new InvalidAnnotationFileException(prettifyJsonInput(in))
val parsed = parse(in)
val annos = parsed match {
case JArray(objs) => objs
case _ => throwError()
}
// Gather classes so we can deserialize arbitrary Annotations
val classes = annos.map({
case JObject(("class", JString(c)) :: tail) => c
case _ => throwError()
}).distinct
val loaded = classes.map(Class.forName(_).asInstanceOf[Class[_ <: Annotation]])
implicit val formats = jsonFormat(loaded)
read[List[Annotation]](in)
})
}
|
