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Kotlin sdk custom validation errors #1397

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Merged
jgindin merged 1 commit into from
May 19, 2026
Merged

Kotlin sdk custom validation errors #1397

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28 changes: 17 additions & 11 deletions agent_sdks/kotlin/src/main/kotlin/com/google/a2ui/core/parser/StreamingParser.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -402,13 +402,14 @@ abstract class StreamingParser(

if (isSu && sid != null) {
if (!seenSu.contains(sid)) {
dedupedMsgs.add(0, m)
dedupedMsgs.add(m)
seenSu.add(sid)
}
} else {
dedupedMsgs.add(0, m)
dedupedMsgs.add(m)
}
}
dedupedMsgs.reverse()
messages[i] = part.copy(a2uiJson = dedupedMsgs)
}

Expand Down Expand Up @@ -480,16 +481,17 @@ abstract class StreamingParser(
if (braceCount >= 0) {
val objBuffer = jsonBuffer.substring(startIdx)
if (objBuffer.startsWith("{") && objBuffer.endsWith("}")) {
val isTopLevel =
braceStack.isEmpty() ||
(inTopLevelList && braceStack.size == 1 && braceStack[0].first == "[")

try {
val obj = Json.parseToJsonElement(objBuffer) as? JsonObject
if (obj != null) {
foundValidJsonInBlock = true

val isProtocol = inTopLevelList && isProtocolMsg(obj)
val isComp = obj.containsKey("id") && obj.containsKey("component")
val isTopLevel =
braceStack.isEmpty() ||
(inTopLevelList && braceStack.size == 1 && braceStack[0].first == "[")

if (isComp) {
handlePartialComponent(obj, messages)
Expand All @@ -516,11 +518,8 @@ abstract class StreamingParser(
}
} catch (e: Exception) {
if (
(e is IllegalArgumentException &&
e !is kotlinx.serialization.SerializationException) ||
e.message?.contains("Circular reference") == true ||
e.message?.contains("Self-reference") == true ||
e.message?.contains("Validation failed") == true
e is IllegalArgumentException &&
e !is kotlinx.serialization.SerializationException
) {
throw e
}
Expand Down Expand Up @@ -588,7 +587,9 @@ abstract class StreamingParser(
"root" -> ROOT_ID_REGEX.find(jsonBuffer, idx)
else -> {
val fragment = jsonBuffer.substring(idx)
Regex("\"$key\"\\s*:\\s*\"([^\"]+)\"").find(fragment)
val regex =
LATEST_VALUE_REGEX_CACHE.getOrPut(key) { Regex("\"$key\"\\s*:\\s*\"([^\"]+)\"") }
regex.find(fragment)
}
}
if (match != null) {
Expand Down Expand Up @@ -630,6 +631,7 @@ abstract class StreamingParser(

protected fun sniffPartialDataModel(messages: MutableList<ResponsePart>) {
val msgType = dataModelMsgType

if (jsonBuffer.indexOf("\"$msgType\"") == -1) return

for (i in braceStack.indices.reversed()) {
Expand Down Expand Up @@ -996,6 +998,9 @@ abstract class StreamingParser(
if (pathElem != null) {
val currentPath = pathElem.jsonPrimitive.content
if (!currentPath.startsWith("/")) {
if (!map.containsKey("componentId")) {
map.clear()
}
map["path"] = JsonPrimitive("/$currentPath")
}
}
Expand Down Expand Up @@ -1093,6 +1098,7 @@ abstract class StreamingParser(
private val PREV_KEY_MATCHES_REGEX = Regex("\"key\"\\s*:\\s*\"([^\"]+)\"")
private val SURFACE_ID_REGEX = Regex("\"surfaceId\"\\s*:\\s*\"([^\"]+)\"")
private val ROOT_ID_REGEX = Regex("\"root\"\\s*:\\s*\"([^\"]+)\"")
private val LATEST_VALUE_REGEX_CACHE = mutableMapOf<String, Regex>()
private const val MAX_JSON_BUFFER_SIZE = 5 * 1024 * 1024

/** Factory method returning a version-specific parser instance. */
Expand Down
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