Add lenientNbtNames option

BenWoodworth · Sep 13, 2024 · 156c014 · 156c014
1 parent 5be8c7a
commit 156c014
Show file tree

Hide file tree

Showing 12 changed files with 115 additions and 5 deletions.
diff --git a/src/commonMain/kotlin/BedrockNbtConfiguration.kt b/src/commonMain/kotlin/BedrockNbtConfiguration.kt
@@ -3,13 +3,15 @@ package net.benwoodworth.knbt
 public class BedrockNbtConfiguration internal constructor(
     override val encodeDefaults: Boolean,
     override val ignoreUnknownKeys: Boolean,
+    override val lenientNbtNames: Boolean,
     override val compression: NbtCompression,
     override val compressionLevel: Int?,
 ) : BinaryNbtFormatConfiguration() {
     override fun toString(): String =
         "BedrockNbtConfiguration(" +
                 "encodeDefaults=$encodeDefaults" +
                 ", ignoreUnknownKeys=$ignoreUnknownKeys" +
+                ", lenientNbtNames=$lenientNbtNames" +
                 ", compression=$compression" +
                 ", compressionLevel=$compressionLevel" +
                 ")"
@@ -25,6 +27,7 @@ public class BedrockNbtBuilder internal constructor(nbt: BedrockNbt?) : BinaryNb
             configuration = BedrockNbtConfiguration(
                 encodeDefaults = encodeDefaults,
                 ignoreUnknownKeys = ignoreUnknownKeys,
+                lenientNbtNames = lenientNbtNames,
                 compression = getConfiguredCompression(),
                 compressionLevel = compressionLevel,
             ),

diff --git a/src/commonMain/kotlin/BedrockNetworkNbtConfiguration.kt b/src/commonMain/kotlin/BedrockNetworkNbtConfiguration.kt
@@ -3,6 +3,7 @@ package net.benwoodworth.knbt
 public class BedrockNetworkNbtConfiguration internal constructor(
     override val encodeDefaults: Boolean,
     override val ignoreUnknownKeys: Boolean,
+    override val lenientNbtNames: Boolean,
     override val compression: NbtCompression,
     override val compressionLevel: Int?,
     public val protocolVersion: Int,
@@ -11,6 +12,7 @@ public class BedrockNetworkNbtConfiguration internal constructor(
         "BedrockNetworkNbtConfiguration(" +
                 "encodeDefaults=$encodeDefaults" +
                 ", ignoreUnknownKeys=$ignoreUnknownKeys" +
+                ", lenientNbtNames=$lenientNbtNames" +
                 ", compression=$compression" +
                 ", compressionLevel=$compressionLevel" +
                 ", protocolVersion=$protocolVersion" +
@@ -44,6 +46,7 @@ public class BedrockNetworkNbtBuilder internal constructor(nbt: BedrockNetworkNb
             configuration = BedrockNetworkNbtConfiguration(
                 encodeDefaults = encodeDefaults,
                 ignoreUnknownKeys = ignoreUnknownKeys,
+                lenientNbtNames = lenientNbtNames,
                 compression = getConfiguredCompression(),
                 compressionLevel = compressionLevel,
                 protocolVersion = getConfiguredProtocolVersion(),

diff --git a/src/commonMain/kotlin/JavaNbtConfiguration.kt b/src/commonMain/kotlin/JavaNbtConfiguration.kt
@@ -3,13 +3,15 @@ package net.benwoodworth.knbt
 public class JavaNbtConfiguration internal constructor(
     override val encodeDefaults: Boolean,
     override val ignoreUnknownKeys: Boolean,
+    override val lenientNbtNames: Boolean,
     override val compression: NbtCompression,
     override val compressionLevel: Int?,
 ) : BinaryNbtFormatConfiguration() {
     override fun toString(): String =
         "JavaNbtConfiguration(" +
                 "encodeDefaults=$encodeDefaults" +
                 ", ignoreUnknownKeys=$ignoreUnknownKeys" +
+                ", lenientNbtNames=$lenientNbtNames" +
                 ", compression=$compression" +
                 ", compressionLevel=$compressionLevel" +
                 ")"
@@ -25,6 +27,7 @@ public class JavaNbtBuilder internal constructor(nbt: JavaNbt?) : BinaryNbtForma
             configuration = JavaNbtConfiguration(
                 encodeDefaults = encodeDefaults,
                 ignoreUnknownKeys = ignoreUnknownKeys,
+                lenientNbtNames = lenientNbtNames,
                 compression = getConfiguredCompression(),
                 compressionLevel = compressionLevel,
             ),

diff --git a/src/commonMain/kotlin/JavaNetworkNbtConfiguration.kt b/src/commonMain/kotlin/JavaNetworkNbtConfiguration.kt
@@ -3,6 +3,7 @@ package net.benwoodworth.knbt
 public class JavaNetworkNbtConfiguration internal constructor(
     override val encodeDefaults: Boolean,
     override val ignoreUnknownKeys: Boolean,
+    override val lenientNbtNames: Boolean,
     override val compression: NbtCompression,
     override val compressionLevel: Int?,
     public val protocolVersion: Int,
@@ -11,6 +12,7 @@ public class JavaNetworkNbtConfiguration internal constructor(
         "JavaNetworkNbtConfiguration(" +
                 "encodeDefaults=$encodeDefaults" +
                 ", ignoreUnknownKeys=$ignoreUnknownKeys" +
+                ", lenientNbtNames=$lenientNbtNames" +
                 ", compression=$compression" +
                 ", compressionLevel=$compressionLevel" +
                 ", protocolVersion=$protocolVersion" +
@@ -58,6 +60,7 @@ public class JavaNetworkNbtBuilder internal constructor(nbt: JavaNetworkNbt?) :
             configuration = JavaNetworkNbtConfiguration(
                 encodeDefaults = encodeDefaults,
                 ignoreUnknownKeys = ignoreUnknownKeys,
+                lenientNbtNames = lenientNbtNames,
                 compression = getConfiguredCompression(),
                 compressionLevel = compressionLevel,
                 protocolVersion = protocolVersion,

diff --git a/src/commonMain/kotlin/Nbt.kt b/src/commonMain/kotlin/Nbt.kt
@@ -23,6 +23,7 @@ public open class Nbt internal constructor(
         configuration = NbtConfiguration(
             encodeDefaults = NbtFormatDefaults.encodeDefaults,
             ignoreUnknownKeys = NbtFormatDefaults.ignoreUnknownKeys,
+            lenientNbtNames = NbtFormatDefaults.lenientNbtNames,
         ),
         serializersModule = NbtFormatDefaults.serializersModule,
     )

diff --git a/src/commonMain/kotlin/NbtConfiguration.kt b/src/commonMain/kotlin/NbtConfiguration.kt
@@ -3,11 +3,13 @@ package net.benwoodworth.knbt
 public class NbtConfiguration internal constructor(
     override val encodeDefaults: Boolean,
     override val ignoreUnknownKeys: Boolean,
+    override val lenientNbtNames: Boolean,
 ) : NbtFormatConfiguration() {
     override fun toString(): String =
         "NbtConfiguration(" +
                 "encodeDefaults=$encodeDefaults" +
                 ", ignoreUnknownKeys=$ignoreUnknownKeys" +
+                ", lenientNbtNames=$lenientNbtNames" +
                 ")"
 }
 
@@ -17,6 +19,7 @@ public class NbtBuilder(nbt: NbtFormat? = null) : NbtFormatBuilder(nbt) {
             configuration = NbtConfiguration(
                 encodeDefaults = encodeDefaults,
                 ignoreUnknownKeys = ignoreUnknownKeys,
+                lenientNbtNames = lenientNbtNames,
             ),
             serializersModule = serializersModule,
         )

diff --git a/src/commonMain/kotlin/NbtFormatConfiguration.kt b/src/commonMain/kotlin/NbtFormatConfiguration.kt
@@ -7,6 +7,7 @@ import kotlinx.serialization.modules.SerializersModule
 public abstract class NbtFormatConfiguration internal constructor() {
     public abstract val encodeDefaults: Boolean
     public abstract val ignoreUnknownKeys: Boolean
+    public abstract val lenientNbtNames: Boolean
 
     abstract override fun toString(): String
 }
@@ -15,6 +16,7 @@ public abstract class NbtFormatConfiguration internal constructor() {
 internal object NbtFormatDefaults {
     const val encodeDefaults: Boolean = false
     const val ignoreUnknownKeys: Boolean = false
+    const val lenientNbtNames: Boolean = false
     val serializersModule: SerializersModule = EmptySerializersModule()
 }
 
@@ -34,6 +36,14 @@ public abstract class NbtFormatBuilder internal constructor(nbt: NbtFormat?) {
     public var ignoreUnknownKeys: Boolean =
         nbt?.configuration?.ignoreUnknownKeys ?: NbtFormatDefaults.ignoreUnknownKeys
 
+    /**
+     * Specifies whether a root [NbtName] mismatch should be ignored when deserializing named [NbtFormat]s
+     * instead of throwing [SerializationException].
+     * `false` by default.
+     */
+    public var lenientNbtNames: Boolean =
+        nbt?.configuration?.lenientNbtNames ?: NbtFormatDefaults.lenientNbtNames
+
     /**
      * Module with contextual and polymorphic serializers to be used in the resulting [NbtFormat] instance.
      */

diff --git a/src/commonMain/kotlin/StringifiedNbt.kt b/src/commonMain/kotlin/StringifiedNbt.kt
@@ -25,6 +25,7 @@ public open class StringifiedNbt internal constructor(
         configuration = StringifiedNbtConfiguration(
             encodeDefaults = NbtFormatDefaults.encodeDefaults,
             ignoreUnknownKeys = NbtFormatDefaults.ignoreUnknownKeys,
+            lenientNbtNames = NbtFormatDefaults.lenientNbtNames,
             prettyPrint = StringifiedNbtDefaults.prettyPrint,
             prettyPrintIndent = StringifiedNbtDefaults.prettyPrintIndent,
         ),

diff --git a/src/commonMain/kotlin/StringifiedNbtConfiguration.kt b/src/commonMain/kotlin/StringifiedNbtConfiguration.kt
@@ -3,6 +3,7 @@ package net.benwoodworth.knbt
 public class StringifiedNbtConfiguration internal constructor(
     override val encodeDefaults: Boolean,
     override val ignoreUnknownKeys: Boolean,
+    override val lenientNbtNames: Boolean,
     public val prettyPrint: Boolean,
     @ExperimentalNbtApi
     public val prettyPrintIndent: String,
@@ -12,6 +13,7 @@ public class StringifiedNbtConfiguration internal constructor(
         "StringifiedNbtConfiguration(" +
                 "encodeDefaults=$encodeDefaults" +
                 ", ignoreUnknownKeys=$ignoreUnknownKeys" +
+                ", lenientNbtNames=$lenientNbtNames" +
                 ", prettyPrint=$prettyPrint" +
                 ", prettyPrintIndent='$prettyPrintIndent'" +
                 ")"
@@ -63,6 +65,7 @@ public class StringifiedNbtBuilder internal constructor(nbt: StringifiedNbt?) :
             configuration = StringifiedNbtConfiguration(
                 encodeDefaults = encodeDefaults,
                 ignoreUnknownKeys = ignoreUnknownKeys,
+                lenientNbtNames = lenientNbtNames,
                 prettyPrint = prettyPrint,
                 prettyPrintIndent = prettyPrintIndent,
             ),

diff --git a/src/commonMain/kotlin/internal/NbtReaderDecoder.kt b/src/commonMain/kotlin/internal/NbtReaderDecoder.kt
@@ -47,11 +47,15 @@ internal abstract class BaseNbtDecoder : AbstractNbtDecoder() {
         if (verifiedNbtName) return
         verifiedNbtName = true
 
-        if (!nbt.capabilities.namedRoot || !context.isSerializingRootValue) return // No need to verify
+        if (!nbt.capabilities.namedRoot || nbt.configuration.lenientNbtNames || !context.isSerializingRootValue) {
+            return // No need to verify
+        }
+
+        if (descriptor.nbtName != decodedTagName && !descriptor.nbtNameIsDynamic) {
+            val message = "Encountered root NBT name '$decodedTagName', but expected '${descriptor.nbtName}'.\n" +
+                    "Use 'lenientNbtNames = true' in NBT builder to ignore mismatched names."
 
-        val name = descriptor.nbtName
-        if (name != decodedTagName && !descriptor.nbtNameIsDynamic) {
-            throw NbtDecodingException(context, "Expected tag named '$name', but got '$decodedTagName'")
+            throw NbtDecodingException(context, message)
         }
     }
 
@@ -307,7 +311,7 @@ private class ClassNbtDecoder(
     override val decodedTagType: NbtTagType
         get() = compoundEntryInfo.type
 
-    override val decodedTagName: String?
+    override val decodedTagName: String? // TODO Remove
         get() = compoundEntryInfo.name
 
     init {

diff --git a/src/commonTest/kotlin/NbtFormatConfigurationTest.kt b/src/commonTest/kotlin/NbtFormatConfigurationTest.kt
@@ -3,8 +3,13 @@ package net.benwoodworth.knbt
 import com.benwoodworth.parameterize.parameter
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.SerializationException
+import net.benwoodworth.knbt.internal.NbtDecodingException
+import net.benwoodworth.knbt.test.filter
 import net.benwoodworth.knbt.test.parameterizeTest
 import net.benwoodworth.knbt.test.parameters.parameterOfDecoderVerifyingNbt
+import net.benwoodworth.knbt.test.parameters.parameterOfSerializableTypeEdgeCases
+import net.benwoodworth.knbt.test.parameters.serializer
+import net.benwoodworth.knbt.test.withNbtName
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertFailsWith
@@ -62,4 +67,34 @@ class NbtFormatConfigurationTest {
             )
         }
     }
+
+    @Test
+    fun should_not_throw_for_mismatched_root_name_in_unnamed_formats() = parameterizeTest {
+        val rootName = "expected_root_name"
+        val encodedRootName = "encoded_root_name"
+
+        val nbt by parameterOfDecoderVerifyingNbt()
+            .filter { !it.capabilities.namedRoot }
+
+        val serializableType by parameterOfSerializableTypeEdgeCases()
+
+        nbt.verifyDecoder(
+            serializableType.serializer().withNbtName(rootName),
+            NbtNamed(encodedRootName, serializableType.valueTag),
+        )
+    }
+
+    @Test
+    fun should_not_throw_for_mismatched_root_name_with_lenient_nbt_names() = parameterizeTest {
+        val rootName = "expected_root_name"
+        val encodedRootName = "encoded_root_name"
+
+        val nbt by parameterOfDecoderVerifyingNbt { lenientNbtNames = true }
+        val serializableType by parameterOfSerializableTypeEdgeCases()
+
+        nbt.verifyDecoder(
+            serializableType.serializer().withNbtName(rootName),
+            NbtNamed(encodedRootName, serializableType.valueTag),
+        )
+    }
 }
diff --git a/src/commonTest/kotlin/test/NbtNameUtil.kt b/src/commonTest/kotlin/test/NbtNameUtil.kt
@@ -0,0 +1,41 @@
+package net.benwoodworth.knbt.test
+
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import net.benwoodworth.knbt.NbtName
+
+private class WithNbtNameSerializer<T>( // TODO Add in previous commit
+    val serializer: KSerializer<T>,
+    nbtName: String
+) : KSerializer<T> {
+    override val descriptor: SerialDescriptor =
+        serializer.descriptor.withNbtName(nbtName)
+
+    override fun serialize(encoder: Encoder, value: T): Unit =
+        encoder.encodeSerializableValue(serializer, value)
+
+    override fun deserialize(decoder: Decoder): T =
+        decoder.decodeSerializableValue(serializer)
+}
+
+@OptIn(ExperimentalSerializationApi::class)
+private data class WithNbtNameSerialDescriptor(
+    val serialDescriptor: SerialDescriptor,
+    val nbtName: String,
+) : SerialDescriptor by serialDescriptor {
+    override val serialName: String = "WithNbtName<${serialDescriptor.serialName}>($nbtName)"
+
+    override val annotations: List<Annotation> =
+        serialDescriptor.annotations
+            .filter { it !is NbtName }
+            .plus(NbtName(nbtName))
+}
+
+fun <T> KSerializer<T>.withNbtName(nbtName: String): KSerializer<T> =
+    WithNbtNameSerializer(this, nbtName)
+
+fun SerialDescriptor.withNbtName(nbtName: String): SerialDescriptor =
+    WithNbtNameSerialDescriptor(this, nbtName)