Exemplo n.º 1
0
  /**
   * Convenience method that takes a result set that contains a discriminator column and returns the
   * class name that it represents.
   *
   * @param discrimMapping Mapping for the discriminator column
   * @param dismd Metadata for the discriminator
   * @param rs The result set
   * @param ec execution context
   * @return The class name for the object represented in the current row
   */
  public static String getClassNameFromDiscriminatorResultSetRow(
      JavaTypeMapping discrimMapping,
      DiscriminatorMetaData dismd,
      ResultSet rs,
      ExecutionContext ec) {
    String rowClassName = null;

    if (discrimMapping != null && dismd.getStrategy() != DiscriminatorStrategy.NONE) {
      try {
        String discriminatorColName =
            discrimMapping.getDatastoreMapping(0).getColumn().getIdentifier().getIdentifierName();
        String discriminatorValue = rs.getString(discriminatorColName);
        rowClassName =
            ec.getMetaDataManager().getClassNameFromDiscriminatorValue(discriminatorValue, dismd);
      } catch (SQLException e) {
        // discriminator column doesn't exist with this name
      }
    }
    return rowClassName;
  }
 private static void addColumnsToScanForEmbeddedMember(
     Scan scan, List<AbstractMemberMetaData> embMmds, Table table, ExecutionContext ec) {
   AbstractMemberMetaData lastMmd = embMmds.get(embMmds.size() - 1);
   ClassLoaderResolver clr = ec.getClassLoaderResolver();
   AbstractClassMetaData embCmd =
       ec.getMetaDataManager().getMetaDataForClass(lastMmd.getTypeName(), clr);
   int[] embMmdPosns = embCmd.getAllMemberPositions();
   for (int i = 0; i < embMmdPosns.length; i++) {
     AbstractMemberMetaData embMmd = embCmd.getMetaDataForManagedMemberAtAbsolutePosition(i);
     List<AbstractMemberMetaData> subEmbMmds = new ArrayList<AbstractMemberMetaData>(embMmds);
     subEmbMmds.add(embMmd);
     RelationType relationType = embMmd.getRelationType(clr);
     MemberColumnMapping mapping = table.getMemberColumnMappingForEmbeddedMember(subEmbMmds);
     if (RelationType.isRelationSingleValued(relationType)) {
       addColumnsToScanForEmbeddedMember(scan, subEmbMmds, table, ec);
     } else {
       String familyName = HBaseUtils.getFamilyNameForColumn(mapping.getColumn(0));
       String qualifName = HBaseUtils.getQualifierNameForColumn(mapping.getColumn(0));
       scan.addColumn(familyName.getBytes(), qualifName.getBytes());
     }
   }
 }