/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.dialect.pagination;

import java.sql.PreparedStatement;
import java.sql.SQLException;

import org.hibernate.engine.spi.RowSelection;

Contract defining dialect-specific LIMIT clause handling. Typically implementers might consider extending AbstractLimitHandler class. 
Author:
Lukasz Antoniak (lukasz dot antoniak at gmail dot com)/**
 * Contract defining dialect-specific LIMIT clause handling. Typically implementers might consider extending
 * {@link AbstractLimitHandler} class.
 *
 * @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
 */
public interface LimitHandler {
	
Does this handler support some form of limiting query results
via a SQL clause?
Returns:
True if this handler supports some form of LIMIT./**
	 * Does this handler support some form of limiting query results
	 * via a SQL clause?
	 *
	 * @return True if this handler supports some form of LIMIT.
	 */
	boolean supportsLimit();

	
Does this handler's LIMIT support (if any) additionally
support specifying an offset?
Returns:
True if the handler supports an offset within the limit support./**
	 * Does this handler's LIMIT support (if any) additionally
	 * support specifying an offset?
	 *
	 * @return True if the handler supports an offset within the limit support.
	 */
	boolean supportsLimitOffset();

	
Return processed SQL query.
Params:
sql –       the SQL query to process.
selection – the selection criteria for rows.
Returns:
Query statement with LIMIT clause applied./**
	 * Return processed SQL query.
	 *
     * @param sql       the SQL query to process.
     * @param selection the selection criteria for rows.
     *
	 * @return Query statement with LIMIT clause applied.
	 */
	String processSql(String sql, RowSelection selection);

	
Bind parameter values needed by the LIMIT clause before original SELECT statement.
Params:
selection – the selection criteria for rows.
statement – Statement to which to bind limit parameter values.
index – Index from which to start binding.
Throws:
SQLException – Indicates problems binding parameter values.
Returns:
The number of parameter values bound./**
	 * Bind parameter values needed by the LIMIT clause before original SELECT statement.
	 *
     * @param selection the selection criteria for rows.
	 * @param statement Statement to which to bind limit parameter values.
	 * @param index Index from which to start binding.
	 * @return The number of parameter values bound.
	 * @throws SQLException Indicates problems binding parameter values.
	 */
	int bindLimitParametersAtStartOfQuery(RowSelection selection, PreparedStatement statement, int index) throws SQLException;

	
Bind parameter values needed by the LIMIT clause after original SELECT statement.
Params:
selection – the selection criteria for rows.
statement – Statement to which to bind limit parameter values.
index – Index from which to start binding.
Throws:
SQLException – Indicates problems binding parameter values.
Returns:
The number of parameter values bound./**
	 * Bind parameter values needed by the LIMIT clause after original SELECT statement.
	 *
     * @param selection the selection criteria for rows.
	 * @param statement Statement to which to bind limit parameter values.
	 * @param index Index from which to start binding.
	 * @return The number of parameter values bound.
	 * @throws SQLException Indicates problems binding parameter values.
	 */
	int bindLimitParametersAtEndOfQuery(RowSelection selection, PreparedStatement statement, int index) throws SQLException;

	
Use JDBC API to limit the number of rows returned by the SQL query. Typically handlers that do not
support LIMIT clause should implement this method.
Params:
selection – the selection criteria for rows.
statement – Statement which number of returned rows shall be limited.
Throws:
SQLException – Indicates problems while limiting maximum rows returned./**
	 * Use JDBC API to limit the number of rows returned by the SQL query. Typically handlers that do not
	 * support LIMIT clause should implement this method.
	 *
     * @param selection the selection criteria for rows.
	 * @param statement Statement which number of returned rows shall be limited.
	 * @throws SQLException Indicates problems while limiting maximum rows returned.
	 */
	void setMaxRows(RowSelection selection, PreparedStatement statement) throws SQLException;
}