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191 days ago

Changelog History
Page 1

  • v1.9.2

    November 17, 2019


    • Fix: Generate correct adapters for several special cases including reified inline types, public classes enclosed in internal classes, deprecated types with -Werror, primitives in type parameters, nullables in type parameters, and type aliases in type parameters.
  • v1.9.1

    October 31, 2019


    • Fix: "abstract function ... cannot have code" code gen crash when parsing Kotlin metadata.
    • Fix: Generate code to support constructors with more than 32 parameters. The 1.9.0 release had a regression where classes with 33+ parameters would crash upon decoding.
    • Fix: Generate code to support more constructor cases, such as classes with non-property parameters and classes with multiple constructors.
    • Fix: Generate code to handle type aliases in type parameters.
  • v1.9.0

    October 29, 2019


    • This release requires kotlin-reflect or moshi-kotlin-codegen for all Kotlin classes.

    Previously Moshi wouldn't differentiate between Kotlin classes and Java classes if Kotlin was not configured. This caused bad runtime behavior such as putting null into non-nullable fields! If you attempt to create an adapter for a Kotlin type, Moshi will throw an IllegalArgumentException.

    Fix this with either the reflection adapter:

       val moshi = Moshi.Builder()
           // ... add your own JsonAdapters and factories ...

    Or the codegen annotation processor:

       @JsonClass(generateAdapter = true)
       data class BlackjackHand(
               val hidden_card: Card,
               val visible_cards: List<Card>

    The [Kotlin documentation][moshi_kotlin_docs] explains the required build configuration changes.

    • New: Change how Moshi's generated adapters call constructors. Previous generated code used a combination of the constructor and copy() method to set properties that have default values. With this update we call the same synthetic constructor that Kotlin uses. This is less surprising though it requires us to generate some tricky code.
    • New: Make Rfc3339DateJsonAdapter null-safe. Previously Moshi would refuse to decode null dates. Restore that behavior by explicitly forbidding nulls with Rfc3339DateJsonAdapter().nonNull().
    • New: Require Kotlin 1.3.50 or newer.
    • New: JsonWriter.valueSink() streams JSON-formatted data inline. Use this to do basic includes of raw JSON within a streamed document.
    • New: Support Gradle incremental processing in code gen.
    • New: Improve error messages. This includes better errors when field names and JSON names disagree, and when failing on an unknown field.
    • New: Support default values in PolymorphicJsonAdapterFactory.
    • New: Permit multiple labels for each subtype in PolymorphicJsonAdapterFactory. The first label is used when writing an object to JSON.
    • New: Forbid automatic encoding of platform classes in kotlinx. As with java.*, android.*, and kotlin.* Moshi wants you to specify how to encode platform types.
    • New: @JsonClass(generator=...) makes it possible for third-party libraries to provide generated adapters when Moshi's default adapters are insufficient.
    • Fix: Simplify wildcard types like List<? extends Number> to their base types List<Number> when finding type adapters. This is especially useful with Kotlin where wildcards may be added automatically.
    • Fix: Use the correct name when the @Json annotation uses field targeting like @field:Json.
    • Fix: Support multiple transient properties in KotlinJsonAdapter.
    • Fix: Don't explode attempting to resolve self-referential type variables like in Comparable<T extends Comparable<T>>.
    • Fix: Don't infinite loop on skipValue() at the end an object or array. Also disallow calling skipValue() at the end of a document.
  • v1.8.0

    November 08, 2018


    • New: Support JSON objects that include type information in the JSON. The new PolymorphicJsonAdapterFactory writes a type field when encoding, and reads it when decoding.
    • New: Fall back to the reflection-based KotlinJsonAdapterFactory if it is enabled and a generated adapter is not found. This makes it possible to use reflection-based JSON adapters in development (so you don't have to wait for code to be regenerated on every build) and generated JSON adapters in production (so you don't need the kotlin-reflect library).
    • New: The peekJson() method on JsonReader let you read ahead on a JSON stream without consuming it. This builds on Okio's new Buffer.peek() API.
    • New: The beginFlatten() and endFlatten() methods on JsonWriter suppress unwanted nesting when composing adapters. Previously it was necessary to flatten objects in memory before writing.
    • New: Upgrade to Okio 1.16.0. We don't yet require Kotlin-friendly Okio 2.1 but Moshi works fine with that release.
    • Fix: Don't return partially-constructed adapters when using a Moshi instance concurrently.
    • Fix: Eliminate warnings and errors in generated .kt triggered by type variance, primitive types, and required values.
    • Fix: Improve the supplied rules ( to better retain symbols used by Moshi. We recommend R8 when shrinking code.
    • Fix: Remove code generation companion objects. This API was neither complete nor necessary.
  • v1.7.0

    September 25, 2018


    • New: EnumJsonAdapter makes it easy to specify a fallback value for unknown enum constants. By default Moshi throws an JsonDataException if it reads an unknown enum constant. With this you can specify a fallback value or null.
       new Moshi.Builder()

    Note that this adapter is in the optional moshi-adapters module.

       implementation 'com.squareup.moshi:moshi-adapters:1.7.0'
    • New: Embed R8/ProGuard rules in the .jar file.
    • New: Use @CheckReturnValue in more places. We hope this will encourage you to use skipName() instead of nextName() for better performance!
    • New: Forbid automatic encoding of platform classes in androidx. As with java.*, android.*, and kotlin.* Moshi wants you to specify how to encode platform types.
    • New: Improve error reporting when creating an adapter fails.
    • New: Upgrade to Okio 1.15.0. We don't yet require Kotlin-friendly Okio 2.x but Moshi works fine with that release.
       implementation 'com.squareup.okio:okio:1.15.0'
    • Fix: Return false from JsonReader.hasNext() at document's end.
    • Fix: Improve code gen to handle several broken cases. Our generated adapters had problems with nulls, nested parameterized types, private transient properties, generic type aliases, fields with dollar signs in their names, and named companion objects.
  • v1.6.0

    May 15, 2018


    • Moshi now supports codegen for Kotlin. We've added a new annotation processor that generates a small and fast JSON adapter for your Kotlin types. It can be used on its own or with the existing KotlinJsonAdapterFactory adapter.

    • Moshi now resolves all type parameters. Previously Moshi wouldn't resolve type parameters on top-level classes.

    • New: Support up to 255 levels of nesting when reading and writing JSON. Previously Moshi would reject JSON input that contained more than 32 levels of nesting.

    • New: Write encoded JSON to a stream with JsonWriter.value(BufferedSource). Use this to emit a JSON value without decoding it first.

    • New: JsonAdapter.nonNull() returns a new JSON adapter that forbids explicit nulls in the JSON body. Use this to detect and fail eagerly on unwanted nulls.

    • New: JsonReader.skipName() is like nextName() but it avoids allocating when a name is unknown. Use this when JsonReader.selectName() returns -1.

    • New: Automatic module name of com.squareup.moshi for use with the Java Platform Module System. This moves moshi-adapters into its own .adapters package and forwards the existing adapter. It moves the moshi-kotlin into its own .kotlin.reflect package and forwards the existing adapter.

    • New: Upgrade to Okio 1.14.0.

    • Fix: Fail fast if there are trailing non-whitespace characters in the JSON passed to JsonAdapter.fromJson(String). Previously such data was ignored!

    • Fix: Fail fast when Kotlin types are abstract, inner, or object instances.

    • Fix: Fail fast if name() is called out of sequence.

    • Fix: Handle asymmetric Type.equals() methods when doing type comparisons. Previously it was possible that a registered type adapter would not be used because its Type.equals() method was not consistent with a user-provided type.

    • Fix: JsonValueReader.selectString() now returns -1 for non-strings instead of throwing.

    • Fix: Permit reading numbers as strings when the JsonReader was created from a JSON value. This was always supported when reading from a stream but broken when reading from a decoded value.

    • Fix: Delegate to user-adapters in the adapter for Object.class. Previously when Moshi encountered an opaque Object it would only use the built-in adapters. With this change user-installed adapters for types like String will always be honored.

  • v1.6.0-RC1

    May 07, 2018
  • v1.5.0

    May 15, 2017


    • Moshi now uses @Nullable to annotate all possibly-null values. We've added a compile-time dependency on the JSR 305 annotations. This is a [provided][maven_provided] dependency and does not need to be included in your build configuration, .jar file, or .apk. We use @ParametersAreNonnullByDefault and all parameters and return types are never null unless explicitly annotated @Nullable.

    • Warning: Moshi APIs in this update are source-incompatible for Kotlin callers. Nullability was previously ambiguous and lenient but now the compiler will enforce strict null checks.

    • Kotlin models are now supported via the moshi-kotlin extension. KotlinJsonAdapterFactory is the best way to use Kotlin with Moshi. It honors default values and is null-safe. Kotlin users that don't use this factory should write custom adapters for their JSON types. Otherwise Moshi cannot properly initialize delegated properties of the objects it decodes.

    • New: Upgrade to Okio 1.13.0.

    • New: You may now declare delegates in @ToJson and @FromJson methods. If one of the arguments to the method is a JsonAdapter of the same type, that will be the next eligible adapter for that type. This may be useful for composing adapters.

    • New: Types.equals(Type, Type) makes it easier to compare types in JsonAdapter.Factory.

    • Fix: Retain the sign on negative zero.

  • v1.4.0

    February 04, 2017


    Moshi 1.4 is a major release that adds JSON values as a core part of the library. We consider any Java object comprised of maps, lists, strings, numbers, booleans and nulls to be a JSON value. These 📜 are equivalent to parsed JSON objects in JavaScript, [Gson][gson]’s JsonElement, and [Jackson][jackson]’s JsonNode. Unlike Jackson and Gson, Moshi just uses Java’s built-in types for its values:

    JSON typeJava type {...}ObjectMap<String, Object> [...]ArrayList<Object> "abc"StringString 123NumberDouble, Long, or BigDecimal trueBooleanBoolean nullnullnull

    Moshi's new API JsonAdapter.toJsonValue() converts your application classes to JSON values comprised of the above types. Symmetrically, JsonAdapter.fromJsonValue() converts JSON values to your application classes.

    • New: JsonAdapter.toJsonValue() and fromJsonValue().
    • New: JsonReader.readJsonValue() reads a JSON value from a stream.
    • New: Moshi.adapter(Type, Class<? extends Annotation>) lets you look up the adapter for a qualified type.
    • New: JsonAdapter.serializeNulls() and indent() return JSON adapters that customize the format of the encoded JSON.
    • New: JsonReader.selectName() and selectString() optimize decoding JSON with known names and values.
    • New: Types.nextAnnotations() reduces the amount of code required to implement a custom JsonAdapter.Factory.
    • Fix: Don't fail on large longs that have a fractional component like 9223372036854775806.0.
  • v1.3.1

    October 21, 2016


    • Fix: Don't incorrectly report invalid input when a slash character is escaped. When we tightened our invalid escape handling we missed the one character that is valid both escaped \/ and unescaped /.