}

    @Test
    public void test_transform_nullResponseData() {
        try {
            transformer.transform(null);
            fail("Should throw CrawlingAccessException for null response");
        } catch (final CrawlingAccessException e) {
            assertTrue(e.getMessage().contains("No response body"));
        }
    }

    @Test
    public void test_transform_noResponseBody() {

        String failureUrlId = "?";
        final CrawlerContext crawlerContext = (CrawlerContext) objs[0];
        final UrlQueue<?> urlQueue = (UrlQueue<?>) objs[1];
        final CrawlingAccessException cae = (CrawlingAccessException) objs[2];
        try {
            Throwable t = cae;
            if (t instanceof final MultipleCrawlingAccessException mcae) {
                final Throwable[] causes = mcae.getCauses();

import org.codelibs.fess.crawler.exception.CrawlingAccessException;

/**
 * Exception thrown when an error occurs during data store crawling operations.
 * This exception provides information about the URL where the error occurred
 * and whether the crawling process should be aborted.
 */
public class DataStoreCrawlingException extends CrawlingAccessException {

    private static final long serialVersionUID = 1L;

### Exception Hierarchy

All exceptions are unchecked (extend `RuntimeException` via `CrawlerSystemException`).

```
CrawlerSystemException (RuntimeException)
  ├─ CrawlingAccessException
  │     └─ MaxLengthExceededException
  ├─ ChildUrlsException
  ├─ ExtractException
  │     └─ UnsupportedExtractException
  ├─ CrawlerLoginFailureException
  ├─ ExecutionTimeoutException