@Override
      public void read(org.apache.thrift.protocol.TProtocol prot, scannerOpen_args struct) throws org.apache.thrift.TException {
        org.apache.thrift.protocol.TTupleProtocol iprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
        java.util.BitSet incoming = iprot.readBitSet(4);
        if (incoming.get(0)) {
          struct.tableName = iprot.readBinary();
          struct.setTableNameIsSet(true);
        }
        if (incoming.get(1)) {
          struct.startRow = iprot.readBinary();
          struct.setStartRowIsSet(true);
        }
        if (incoming.get(2)) {
          {
            org.apache.thrift.protocol.TList _list497 = iprot.readListBegin(org.apache.thrift.protocol.TType.STRING);
            struct.columns = new java.util.ArrayList<java.nio.ByteBuffer>(_list497.size);
            @org.apache.thrift.annotation.Nullable java.nio.ByteBuffer _elem498;
            for (int _i499 = 0; _i499 < _list497.size; ++_i499)
            {
              _elem498 = iprot.readBinary();
              struct.columns.add(_elem498);
            }
          }
          struct.setColumnsIsSet(true);
        }
        if (incoming.get(3)) {
          {
            org.apache.thrift.protocol.TMap _map500 = iprot.readMapBegin(org.apache.thrift.protocol.TType.STRING, org.apache.thrift.protocol.TType.STRING); 
            struct.attributes = new java.util.HashMap<java.nio.ByteBuffer,java.nio.ByteBuffer>(2*_map500.size);
            @org.apache.thrift.annotation.Nullable java.nio.ByteBuffer _key501;
            @org.apache.thrift.annotation.Nullable java.nio.ByteBuffer _val502;
            for (int _i503 = 0; _i503 < _map500.size; ++_i503)
            {
              _key501 = iprot.readBinary();
              _val502 = iprot.readBinary();
              struct.attributes.put(_key501, _val502);
            }
          }
          struct.setAttributesIsSet(true);
        }
      }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/Hbase.java