private void serialize()

in google-http-client/src/main/java/com/google/api/client/json/JsonGenerator.java [109:177]
68 lines of code
28 McCabe index (conditional complexity)

  private void serialize(boolean isJsonString, Object value) throws IOException {
    if (value == null) {
      return;
    }
    Class<?> valueClass = value.getClass();
    if (Data.isNull(value)) {
      writeNull();
    } else if (value instanceof String) {
      writeString((String) value);
    } else if (value instanceof Number) {
      if (isJsonString) {
        writeString(value.toString());
      } else if (value instanceof BigDecimal) {
        writeNumber((BigDecimal) value);
      } else if (value instanceof BigInteger) {
        writeNumber((BigInteger) value);
      } else if (value instanceof Long) {
        writeNumber((Long) value);
      } else if (value instanceof Float) {
        float floatValue = ((Number) value).floatValue();
        Preconditions.checkArgument(!Float.isInfinite(floatValue) && !Float.isNaN(floatValue));
        writeNumber(floatValue);
      } else if (value instanceof Integer || value instanceof Short || value instanceof Byte) {
        writeNumber(((Number) value).intValue());
      } else {
        double doubleValue = ((Number) value).doubleValue();
        Preconditions.checkArgument(!Double.isInfinite(doubleValue) && !Double.isNaN(doubleValue));
        writeNumber(doubleValue);
      }
    } else if (value instanceof Boolean) {
      writeBoolean((Boolean) value);
    } else if (value instanceof DateTime) {
      writeString(((DateTime) value).toStringRfc3339());
    } else if (value instanceof Iterable<?> || valueClass.isArray()) {
      writeStartArray();
      for (Object o : Types.iterableOf(value)) {
        serialize(isJsonString, o);
      }
      writeEndArray();
    } else if (valueClass.isEnum()) {
      String name = FieldInfo.of((Enum<?>) value).getName();
      if (name == null) {
        writeNull();
      } else {
        writeString(name);
      }
    } else {
      writeStartObject();
      // only inspect fields of POJO (possibly extends GenericData) but not generic Map
      boolean isMapNotGenericData = value instanceof Map<?, ?> && !(value instanceof GenericData);
      ClassInfo classInfo = isMapNotGenericData ? null : ClassInfo.of(valueClass);
      for (Map.Entry<String, Object> entry : Data.mapOf(value).entrySet()) {
        Object fieldValue = entry.getValue();
        if (fieldValue != null) {
          String fieldName = entry.getKey();
          boolean isJsonStringForField;
          if (isMapNotGenericData) {
            isJsonStringForField = isJsonString;
          } else {
            Field field = classInfo.getField(fieldName);
            isJsonStringForField = field != null && field.getAnnotation(JsonString.class) != null;
          }
          writeFieldName(fieldName);
          serialize(isJsonStringForField, fieldValue);
        }
      }
      writeEndObject();
    }
  }