code: public static String oneFromRepository(FedoraAPIAMTOM sourceRepoAPIA,
                                             FedoraAPIMMTOM sourceRepoAPIM,
                                             String sourceExportFormat,
                                             String pid,
                                             FedoraAPIAMTOM targetRepoAPIA,
                                             FedoraAPIMMTOM targetRepoAPIM,
                                             String logMessage) throws Exception {
  
          // EXPORT from source repository
          // The export context is set to "migrate" since the intent
          // of ingest from repository is to migrate an object from
          // one repository to another.  The "migrate" option will
          // ensure that URLs that were relative to the "exporting"
          // repository are made relative to the "importing" repository.
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          AutoExporter.export(sourceRepoAPIA,
                              sourceRepoAPIM,
                              pid,
                              sourceExportFormat,
                              "migrate",
                              out);
  
          // Convert old format values to URIs for ingest
          String ingestFormat = sourceExportFormat;
          if (sourceExportFormat.equals(METS_EXT1_0_LEGACY)) {
              ingestFormat = METS_EXT1_0.uri;
          } else if (sourceExportFormat.equals(FOXML1_0_LEGACY)) {
              ingestFormat = FOXML1_0.uri;
          }
  
          // INGEST into target repository
          String realLogMessage = logMessage;
          if (realLogMessage == null) {
              realLogMessage = "Ingested from source repository with pid " + pid;
          }
          return AutoIngestor.ingestAndCommit(targetRepoAPIA,
                                              targetRepoAPIM,
                                              new ByteArrayInputStream(out
                                                      .toByteArray()),
                                              ingestFormat,
                                              realLogMessage);
      }
docs: if logMessage is null, will make informative one up