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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_CONNECTIVITY_DBMETADATA_HXX
#define INCLUDED_CONNECTIVITY_DBMETADATA_HXX
#include <com/sun/star/sdbc/XConnection.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <memory>
#include <connectivity/dbtoolsdllapi.hxx>
namespace dbtools
{
//= DatabaseMetaData
struct DatabaseMetaData_Impl;
/** encapsulates meta data about a database/connection which cannot be obtained
from the usual XDatabaseMetaData result set.
Meta data perhaps isn't really the right term ... Some of the methods
in this class involved heuristics, some are just a convenient wrapper
around more complex ways to obtain the same information.
@todo
Once CWS dba30 is integrated, we could easily add all the meta data
which is part of the "Info" property of a data source.
*/
class OOO_DLLPUBLIC_DBTOOLS DatabaseMetaData
{
private:
::std::unique_ptr< DatabaseMetaData_Impl > m_pImpl;
public:
DatabaseMetaData();
/** constructs a DatabaseMetaData instance
@param _rxConnection
is the connection whose meta data you're interested in.
Note that some of the information provided by this class can only be obtained
if this connection denotes an application-level connection, i.e. supports
the com.sun.star.sdb.Connection service.
@throws css::lang::IllegalArgumentException
if the given connection is not <NULL/>, but the XDatabaseMetaData provided by it
are <NULL/>
@throws css::sdbc::SQLException
if obtaining the meta data from the connection throws an SQLException
@throws css::uno::RuntimeException
if obtaining the meta data from the connection throws an RuntimeException
*/
DatabaseMetaData(
const css::uno::Reference< css::sdbc::XConnection >& _connection );
DatabaseMetaData( const DatabaseMetaData& _copyFrom );
DatabaseMetaData& operator=( const DatabaseMetaData& _copyFrom );
~DatabaseMetaData();
public:
/** determines whether or not the instances is based on a valid connection
As long as this method returns true<TRUE/>, you should expect all other
methods throwing an SQLException when called.
*/
bool isConnected() const;
/** resets the instance so that it's based on a new connection
*/
inline void reset( const css::uno::Reference< css::sdbc::XConnection >& _connection )
{
*this = DatabaseMetaData( _connection );
}
/// wraps XDatabaseMetaData::getIdentifierQuoteString
const OUString& getIdentifierQuoteString() const;
/// wraps XDatabaseMetaData::getCatalogSeparator
const OUString& getCatalogSeparator() const;
/** determines whether the database supports sub queries in the FROM part
of a SELECT clause are supported.
@throws css::sdbc::SQLException
with SQLState 08003 (connection does not exist) if the instances was
default-constructed and does not have a connection, yet.
*/
bool supportsSubqueriesInFrom() const;
/** checks whether the database supports primary keys
Since there's no dedicated API to ask a database for this, a heuristics needs to be applied.
First, the <code>PrimaryKeySupport<code> settings of the data source is examined. If it is <TRUE/>
or <FALSE/>, then value is returned. If it is <NULL/>, then the database meta data are examined
for support of core SQL grammar, and the result is returned. The assumption is that a database/driver
which supports core SQL grammar usually also supports primary keys, and vice versa. At least, experience
shows this is true most of the time.
*/
bool supportsPrimaryKeys() const;
/** determines whether names in the database should be restricted to SQL-92 identifiers
Effectively, this method checks the EnableSQL92Check property of the data source settings,
if present.
*/
bool restrictIdentifiersToSQL92() const;
/** determines whether when generating SQL statements, an AS keyword should be generated
before a correlation name.
E.g., it determines whether <code>SELECT * FROM table AS correlation_name</code> or
<code>SELECT * FROM table correlation_name</code> is generated.
*/
bool generateASBeforeCorrelationName() const;
/** should date time be escaped like '2001-01-01' => {D '2001-01-01' }
*/
bool shouldEscapeDateTime() const;
/** auto increment columns should be automatically used as primary key.
*/
bool isAutoIncrementPrimaryKey() const;
/** determines the syntax to use for boolean comparison predicates
@see css::sdb::BooleanComparisonMode
*/
sal_Int32
getBooleanComparisonMode() const;
/** determines in relations are supported.
*
* \return <TRUE/> when relations are supported, otherwise <FALSE/>
*/
bool supportsRelations() const;
/** determines if column alias names can be used in the order by clause.
*
* \return <TRUE/> when relations are supported, otherwise <FALSE/>
*/
bool supportsColumnAliasInOrderBy() const;
/** determines whether user administration is supported for the database
User administration support is controlled by the availability of the XUsersSupplier
interface, and it returning a non-NULL users container.
@param _rContext
the component context we operate in. Might be needed to create the
css.sdbc.DriverManager instance.
*/
bool supportsUserAdministration( const css::uno::Reference<css::uno::XComponentContext>& _rContext ) const;
/** determines whether in the application UI, empty table folders (aka catalogs/schemas) should be displayed
*/
bool displayEmptyTableFolders() const;
/** determines that threads are supported.
*
* \return <TRUE/> when threads are supported, otherwise <FALSE/>
*/
bool supportsThreads() const;
};
} // namespace dbtools
#endif // INCLUDED_CONNECTIVITY_DBMETADATA_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
