public void setFieldValue(_Fields field, @org.apache.thrift.annotation.Nullable java.lang.Object value) {
      switch (field) {
      case TABLE_NAME:
        if (value == null) {
          unsetTableName();
        } else {
          if (value instanceof byte[]) {
            setTableName((byte[])value);
          } else {
            setTableName((java.nio.ByteBuffer)value);
          }
        }
        break;

      case ROW:
        if (value == null) {
          unsetRow();
        } else {
          if (value instanceof byte[]) {
            setRow((byte[])value);
          } else {
            setRow((java.nio.ByteBuffer)value);
          }
        }
        break;

      case TIMESTAMP:
        if (value == null) {
          unsetTimestamp();
        } else {
          setTimestamp((java.lang.Long)value);
        }
        break;

      case ATTRIBUTES:
        if (value == null) {
          unsetAttributes();
        } else {
          setAttributes((java.util.Map<java.nio.ByteBuffer,java.nio.ByteBuffer>)value);
        }
        break;

      }
    }
Returns true if field attributes is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/Hbase.java