tablestore/src/main/java/com/alicloud/openservices/tablestore/model/iterator/BulkExportIterator.java [71:114]:
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    private boolean isBufferHasMoreData() {
        return rowsIter.hasNext();
    }

    private Row getNextFromBuffer() {
        return rowsIter.next();
    }

    @Override
    public boolean hasNext() {
        // has data in buffer
        if (isBufferHasMoreData()) {
            return true;
        }

        // need to send one more request
        PrimaryKey nextToken = result.getNextStartPrimaryKey();
        while (nextToken != null && !nextToken.isEmpty() && totalCount != rowsRead) {
            fetchData(buildRequest());
            if (isBufferHasMoreData()) {
                return true;
            }
            nextToken = result.getNextStartPrimaryKey();
        }

        return false;
    }

    @Override
    public Row next() {
        if (!hasNext()) {
            throw new NoSuchElementException();
        }

        return getNextFromBuffer();
    }

    @Override
    public void remove() {
        throw new ClientException("RowIterator do not support remove().");
    }

    public long getTotalCount() {
        return totalCount;
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tablestore/src/main/java/com/alicloud/openservices/tablestore/model/iterator/GetRangeRowIterator.java [88:131]:
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    private boolean isBufferHasMoreData() {
        return rowsIter.hasNext();
    }

    private Row getNextFromBuffer() {
        return rowsIter.next();
    }

    @Override
    public boolean hasNext() {
        // has data in buffer
        if (isBufferHasMoreData()) {
            return true;
        }

        // need to send one more request
        PrimaryKey nextToken = result.getNextStartPrimaryKey();
        while (nextToken != null && !nextToken.isEmpty() && totalCount != rowsRead) {
            fetchData(buildRequest());
            if (isBufferHasMoreData()) {
                return true;
            }
            nextToken = result.getNextStartPrimaryKey();
        }

        return false;
    }

    @Override
    public Row next() {
        if (!hasNext()) {
            throw new NoSuchElementException();
        }

        return getNextFromBuffer();
    }

    @Override
    public void remove() {
        throw new ClientException("RowIterator do not support remove().");
    }

    public long getTotalCount() {
        return totalCount;
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