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/*
 * 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 .
 */
package org.hibernate.engine.jdbc.env.spi;

import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import org.hibernate.engine.jdbc.spi.TypeInfo;
import org.hibernate.tool.schema.extract.spi.SequenceInformation;

/**
 * Information extracted from {@link java.sql.DatabaseMetaData} regarding what the JDBC driver reports as
 * being supported or not.  Obviously {@link java.sql.DatabaseMetaData} reports many things, these are a few in
 * which we have particular interest.
 *
 * @author Steve Ebersole
 */
@SuppressWarnings( {"UnusedDeclaration"})
public interface ExtractedDatabaseMetaData {
	/**
	 * Obtain the JDBC Environment from which this metadata came.
	 *
	 * @return The JDBC environment
	 */
	JdbcEnvironment getJdbcEnvironment();

	/**
	 * Retrieve the name of the catalog in effect when we connected to the database.
	 *
	 * @return The catalog name
	 */
	String getConnectionCatalogName();

	/**
	 * Retrieve the name of the schema in effect when we connected to the database.
	 *
	 * @return The schema name
	 */
	String getConnectionSchemaName();

	/**
	 * Set of type info reported by the driver.
	 *
	 * @return The type information obtained from the driver.
	 *
	 * @see java.sql.DatabaseMetaData#getTypeInfo()
	 */
	LinkedHashSet getTypeInfoSet();

	/**
	 * Get the list of extra keywords (beyond standard SQL92 keywords) reported by the driver.
	 *
	 * @return The extra keywords used by this database.
	 *
	 * @see java.sql.DatabaseMetaData#getSQLKeywords()
	 */
	Set getExtraKeywords();

	/**
	 * Does the driver report supporting named parameters?
	 *
	 * @return {@code true} indicates the driver reported true; {@code false} indicates the driver reported false
	 * or that the driver could not be asked.
	 */
	boolean supportsNamedParameters();

	/**
	 * Does the driver report supporting REF_CURSORs?
	 *
	 * @return {@code true} indicates the driver reported true; {@code false} indicates the driver reported false
	 * or that the driver could not be asked.
	 */
	boolean supportsRefCursors();

	/**
	 * Did the driver report to supporting scrollable result sets?
	 *
	 * @return True if the driver reported to support {@link java.sql.ResultSet#TYPE_SCROLL_INSENSITIVE}.
	 *
	 * @see java.sql.DatabaseMetaData#supportsResultSetType
	 */
	boolean supportsScrollableResults();

	/**
	 * Did the driver report to supporting retrieval of generated keys?
	 *
	 * @return True if the if the driver reported to support calls to {@link java.sql.Statement#getGeneratedKeys}
	 *
	 * @see java.sql.DatabaseMetaData#supportsGetGeneratedKeys
	 */
	boolean supportsGetGeneratedKeys();

	/**
	 * Did the driver report to supporting batched updates?
	 *
	 * @return True if the driver supports batched updates
	 *
	 * @see java.sql.DatabaseMetaData#supportsBatchUpdates
	 */
	boolean supportsBatchUpdates();

	/**
	 * Did the driver report to support performing DDL within transactions?
	 *
	 * @return True if the drivers supports DDL statements within transactions.
	 *
	 * @see java.sql.DatabaseMetaData#dataDefinitionIgnoredInTransactions
	 */
	boolean supportsDataDefinitionInTransaction();

	/**
	 * Did the driver report to DDL statements performed within a transaction performing an implicit commit of the
	 * transaction.
	 *
	 * @return True if the driver/database performs an implicit commit of transaction when DDL statement is
	 * performed
	 *
	 * @see java.sql.DatabaseMetaData#dataDefinitionCausesTransactionCommit()
	 */
	boolean doesDataDefinitionCauseTransactionCommit();

	/**
	 * Retrieve the type of codes the driver says it uses for {@code SQLState}.  They might follow either
	 * the X/Open standard or the SQL92 standard.
	 *
	 * @return The SQLState strategy reportedly used by this driver/database.
	 *
	 * @see java.sql.DatabaseMetaData#getSQLStateType()
	 */
	SQLStateType getSqlStateType();

	/**
	 * Did the driver report that updates to a LOB locator affect a copy of the LOB?
	 *
	 * @return True if updates to the state of a LOB locator update only a copy.
	 *
	 * @see java.sql.DatabaseMetaData#locatorsUpdateCopy()
	 */
	boolean doesLobLocatorUpdateCopy();

	/**
	 * Retrieve the list of {@code SequenceInformation} objects which describe the underlying database sequences.
	 *
	 * @return {@code SequenceInformation} objects.
	 */
	default List getSequenceInformationList() {
		return Collections.emptyList();
	}
}