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Jackson2JsonDecoder should support empty JSON array

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Before this commit, the Jackson2JsonDecoder was not able to decode an
empty JSON array (`[]`). After this commit, it is.

Issue: SPR-15685
This commit is contained in:
Arjen Poutsma
2017-06-21 11:14:11 +02:00
parent 1e04cdfa7e
commit 0a4d3c14db
2 changed files with 35 additions and 9 deletions
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13
spring-web/src/main/java/org/springframework/http/codec/json/Jackson2JsonDecoder.java
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@@ -111,20 +111,23 @@ public class Jackson2JsonDecoder extends Jackson2CodecSupport implements HttpMes
this.objectMapper.readerFor(javaType));
return objectDecoder.decode(inputStream, elementType, mimeType, hints)
.map(dataBuffer -> {
.flatMap(dataBuffer -> {
if (dataBuffer.readableByteCount() == 0) {
return Mono.empty();
}
try {
Object value = reader.readValue(dataBuffer.asInputStream());
DataBufferUtils.release(dataBuffer);
return value;
return Mono.just(value);
}
catch (InvalidDefinitionException ex) {
throw new CodecException("Type definition error: " + ex.getType(), ex);
return Mono.error(new CodecException("Type definition error: " + ex.getType(), ex));
}
catch (JsonProcessingException ex) {
throw new DecodingException("JSON decoding error: " + ex.getOriginalMessage(), ex);
return Mono.error(new DecodingException("JSON decoding error: " + ex.getOriginalMessage(), ex));
}
catch (IOException ex) {
throw new DecodingException("I/O error while parsing input stream", ex);
return Mono.error(new DecodingException("I/O error while parsing input stream", ex));
}
});
}