package liquibase.snapshot;

 import liquibase.database.Database;

 import liquibase.database.AbstractDatabase;

 import liquibase.database.structure.Table;

 import liquibase.database.structure.Column;

 import liquibase.database.structure.ForeignKey;

 import liquibase.diff.DiffStatusListener;

 import liquibase.exception.DatabaseException;

 import liquibase.servicelocator.PrioritizedService;

 import java.util.Set;

 import java.util.List;

 public interface DatabaseSnapshotGenerator {

     /**

      * Default generator, lower priority.

      */

     public static final int PRIORITY_DEFAULT = 1;

     /**

      * Generator specific to database, higher priority.

      * 

      */

     public static final int PRIORITY_DATABASE = 5;

     boolean supports(Database database);

     int getPriority(Database database);

     DatabaseSnapshot createSnapshot(Database database, String schema, Set<DiffStatusListener> listeners)

             throws DatabaseException;

     Table getDatabaseChangeLogTable(Database database) throws DatabaseException;

     Table getDatabaseChangeLogLockTable(Database database) throws DatabaseException;

     Table getTable(String schemaName, String tableName, Database database) throws DatabaseException;

     Column getColumn(String schemaName, String tableName, String columnName, Database database)

             throws DatabaseException;

     ForeignKey getForeignKeyByForeignKeyTable(String schemaName, String tableName, String fkName, Database database)

             throws DatabaseException;

     List<ForeignKey> getForeignKeys(String schemaName, String tableName, Database database) throws DatabaseException;

     boolean hasIndex(String schemaName, String tableName, String indexName, Database database, String columnNames)

             throws DatabaseException;

     boolean hasDatabaseChangeLogTable(Database database);

     boolean hasDatabaseChangeLogLockTable(Database database);

     public boolean hasTable(String schemaName, String tableName, Database database);

     public boolean hasView(String schemaName, String viewName, Database database);

 }