JsonGenerator generates incomplete json string

[sunmingtao]

final JsonFactory jf = new JsonFactory();
try (
      final ByteArrayOutputStream baos = new ByteArrayOutputStream();
      final JsonGenerator jg = jf.createGenerator(baos, JsonEncoding.UTF8)) {
        jg.writeStartObject();
        jg.writeStringField("query", ocrSearch.getRawQueryStr());
        jg.writeArrayFieldStart("matches");
        final List<HighlightSnippet> snippets = getSnippets(10000L);
        snippets.forEach(s -> s.write(jg));
        jg.writeEndArray();
        jg.writeEndObject();
       String result = baos.toString(StandardCharsets.UTF_8); 
}

Inspect the result object, and find the value is not well formatted json string. e.g. {"name":"abc", "age":

[sunmingtao]

Turns out the ByteArrayOutputStream cannot be put in the try block. And it's OK to put it outside the try block without calling close() method on it.

Correct code:

final JsonFactory jf = new JsonFactory();
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (final JsonGenerator jg = jf.createGenerator(baos, JsonEncoding.UTF8)) {
      // Write header
      jg.writeStartObject();
      jg.writeStringField("query", ocrSearch.getRawQueryStr());
      jg.writeArrayFieldStart("matches");
      final List<HighlightSnippet> snippets = getSnippets(10000L);
      snippets.forEach(s -> s.write(jg));
      // Write footer
      jg.writeEndArray();
      jg.writeEndObject();
}
String result = baos.toString(StandardCharsets.UTF_8);