[jira] [Created] (AVRO-1711) JsonDecoder.skipChildren skips more than it should.

[Zoltan Farkas (JIRA)]

Zoltan Farkas created AVRO-1711:
-----------------------------------

             Summary: JsonDecoder.skipChildren skips more than it should.
                 Key: AVRO-1711
                 URL: https://issues.apache.org/jira/browse/AVRO-1711
             Project: Avro
          Issue Type: Bug
    Affects Versions: 1.8.0
            Reporter: Zoltan Farkas


JsonDecoder.skipChildren() does not respect Contract, it will point to the next 
available token after END_ARRAY and END_OBJECT. It should point to END_ARRAY 
and END_OBJECT instead

Here is current implementation:
{noformat}
      @Override
      public JsonParser skipChildren() throws IOException {
        int level = 0;
        do {
          switch(elements.get(pos++).token) {
          case START_ARRAY:
          case START_OBJECT:
            level++;
            break;
          case END_ARRAY:
          case END_OBJECT:
            level--;
            break;
          }
        } while (level > 0);
        return this;
      }
{noformat}

Here is the documentation of what the method needs to do:
{noformat}
    /**
     * Method that will skip all child tokens of an array or
     * object token that the parser currently points to,
     * iff stream points to 
     * {@link JsonToken#START_OBJECT} or {@link JsonToken#START_ARRAY}.
     * If not, it will do nothing.
     * After skipping, stream will point to <b>matching</b>
     * {@link JsonToken#END_OBJECT} or {@link JsonToken#END_ARRAY}
     * (possibly skipping nested pairs of START/END OBJECT/ARRAY tokens
     * as well as value tokens).
     * The idea is that after calling this method, application
     * will call {@link #nextToken} to point to the next
     * available token, if any.
     */
{noformat}

here is the implementation, fixed:

{noformat}
      @Override
      public JsonParser skipChildren() throws IOException {
        int level = 0;
        do {
          switch(elements.get(pos++).token) {
          case START_ARRAY:
          case START_OBJECT:
            level++;
            break;
          case END_ARRAY:
          case END_OBJECT:
            level--;
            break;
          }
        } while (level > 0);
        pos--;
        return this;
      }
{noformat}






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