public boolean next()

in core/src/main/java/com/twitter/elephantbird/mapred/input/DeprecatedInputFormatWrapper.java [324:375]
43 lines of code
10 McCabe index (conditional complexity)

    public boolean next(K key, V value) throws IOException {
      if (eof) {
        return false;
      }

      if (firstRecord) { // key & value are already read.
        firstRecord = false;
        return true;
      }

      if (mifcReader != null) {
        mifcReader.setKeyValue(key, value);
      }

      try {
        if (realReader.nextKeyValue()) {

					if (key != realReader.getCurrentKey()) {

            if (mifcReader != null) {
              throw new IOException("The RecordReader returned a key and value that do not match "
                  + "the key and value sent to it. This means the RecordReader did not properly implement "
                  + "com.twitter.elephantbird.mapred.input.MapredInputFormatCompatible. "
                  + "Current reader class : " + realReader.getClass());

            } else {
              throw new IOException("DeprecatedInputFormatWrapper only "
                  + "supports RecordReaders that return the same key & value "
                  + "objects or implement com.twitter.elephantbird.mapred.input.MapredInputFormatCompatible. "
                  + "Current reader class : " + realReader.getClass());
            }

					}

					if (value != realReader.getCurrentValue()) {
						if (null != valueCopier)
							valueCopier.copyValue(value, realReader.getCurrentValue());
						else {
							throw new IOException("DeprecatedInputFormatWrapper - value is different "
									+ "and no value copier provided. "
									+ "Current reader class : " + realReader.getClass());
          }
					}
          return true;
        }
      } catch (InterruptedException e) {
        throw new IOException(e);
      }

      eof = true; // strictly not required, just for consistency
      return false;
    }