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/*
* Copyright (c) 2002, 2020, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.protocol;
import com.mysql.cj.Messages;
import com.mysql.cj.exceptions.CJOperationNotSupportedException;
import com.mysql.cj.exceptions.ExceptionFactory;
import com.mysql.cj.result.Row;
import com.mysql.cj.result.RowList;
/**
* This interface abstracts away how row data is accessed by the result set. It is meant to allow a static implementation (Current version), and a streaming
* one. It extends the {@link RowList} functionality by providing row positioning, updatability and ownership.
*/
public interface ResultsetRows extends RowList, ProtocolEntity {
/**
* Adds a row.
*
* @param row
* the row to add
*/
default void addRow(Row row) {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, Messages.getString("OperationNotSupportedException.0"));
}
/**
* Moves to after last.
*
*/
default void afterLast() {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, Messages.getString("OperationNotSupportedException.0"));
}
/**
* Moves to before first.
*
*/
default void beforeFirst() {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, Messages.getString("OperationNotSupportedException.0"));
}
/**
* Moves to before last.
*
*/
default void beforeLast() {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, Messages.getString("OperationNotSupportedException.0"));
}
/**
* We're done.
*
*/
default void close() {
}
/**
* Returns the result set that 'owns' this RowData
*
* @return {@link ResultsetRowsOwner}
*/
ResultsetRowsOwner getOwner();
/**
* Returns true if we got the last element.
*
* @return true if after last row
*/
boolean isAfterLast();
/**
* Returns if iteration has not occured yet.
*
* @return true if before first row
*/
boolean isBeforeFirst();
/**
* Returns true if the result set is dynamic.
*
* This means that move back and move forward won't work because we do not
* hold on to the records.
*
* @return true if this result set is streaming from the server
*/
default boolean isDynamic() {
return true;
}
/**
* Has no records.
*
* @return true if no records
*/
default boolean isEmpty() {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, Messages.getString("OperationNotSupportedException.0"));
}
/**
* Are we on the first row of the result set?
*
* @return true if on first row
*/
default boolean isFirst() {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, Messages.getString("OperationNotSupportedException.0"));
}
/**
* Are we on the last row of the result set?
*
* @return true if on last row
*/
default boolean isLast() {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, Messages.getString("OperationNotSupportedException.0"));
}
/**
* Moves the current position relative 'rows' from the current position.
*
* @param rows
* the relative number of rows to move
*/
default void moveRowRelative(int rows) {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, Messages.getString("OperationNotSupportedException.0"));
}
/**
* Moves the current position in the result set to the given row number.
*
* @param rowNumber
* row to move to
*/
default void setCurrentRow(int rowNumber) {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, Messages.getString("OperationNotSupportedException.0"));
}
/**
* Set the result set that 'owns' this RowData
*
* @param rs
* the result set that 'owns' this RowData
*/
void setOwner(ResultsetRowsOwner rs);
/**
* Did this result set have no rows?
*
* @return true if the result set did not have rows
*/
boolean wasEmpty();
/**
* Sometimes the driver doesn't have metadata until after
* the statement has the result set in-hand (because it's cached),
* so it can call this to set it after the fact.
*
* @param columnDefinition
* field-level metadata for the result set
*/
void setMetadata(ColumnDefinition columnDefinition);
ColumnDefinition getMetadata();
}
