fix FileMeta (#160)

Author: cyjseagull

wedpr-components/db-mapper/dataset/src/main/java/com/webank/wedpr/components/db/mapper/dataset/dao/Dataset.java

@@ -22,6 +22,7 @@
 @Data
 public class Dataset {
     private static final Logger logger = LoggerFactory.getLogger(Dataset.class);
+    // Note: should chang with the DatasetMapper at the same time
     public static final Integer INVALID_DATASET_STATUS = -100000;
 
     @Data

wedpr-components/scheduler/src/main/java/com/webank/wedpr/components/scheduler/executor/impl/model/FileMeta.java

@@ -59,7 +59,7 @@ public Integer getType() {
     protected String path;
     protected String owner;
     protected String ownerAgency;
-    protected long datasetRecordCount = 0;
+    protected Integer datasetRecordCount = 0;
 
     public FileMeta() {}
 
@@ -75,6 +75,9 @@ public void obtainDatasetInfo(DatasetMapper datasetMapper) throws Exception {
             throw new WeDPRException("Invalid fileMeta, must define the datasetID");
         }
         this.dataset = datasetMapper.getDatasetByDatasetId(this.datasetID, false);
+        if (this.dataset == null) {
+            throw new WeDPRException("No dataset " + this.datasetID + " found!");
+        }
         // set the information
         setStorageTypeStr(this.dataset.getDatasetStorageType());
         setPath(this.dataset.getStoragePathMeta().getFilePath());