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/*
* _____________________________________________________________________________
*
* INAF - OATS National Institute for Astrophysics - Astronomical Observatory of
* Trieste INAF - IA2 Italian Center for Astronomical Archives
* _____________________________________________________________________________
*
* Copyright (C) 2017 Istituto Nazionale di Astrofisica
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License Version 3 as published by the
* Free Software Foundation.
*
* 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 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package it.inaf.ia2.tsm.datalayer;
import it.inaf.ia2.tsm.ColumnHolder;
import it.inaf.ia2.tsm.ConsistencyChecks;
import it.inaf.ia2.tsm.Key;
import it.inaf.ia2.tsm.TapSchema;
import it.inaf.ia2.tsm.TapSchemaEntity;
import it.inaf.ia2.tsm.model.ColumnModel;
import it.inaf.ia2.tsm.model.TableModel;
import it.inaf.ia2.tsm.model.SchemaModel;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
* This interface can be seen as a DAO (Data Access Object pattern), however it
* has been called more generically a "broker to the database", because it
* doesn't map exactly the CRUD operations, indeed it contains some specific
* methods for interacting to the databases (executing SQL statement) and
* retrieving/storing data regarding TAP SCHEMA. Generic operations are
* implemented inside the abstract class {@link DBBrokerTemplate}. The latter is
* then extended by specific MySQL and Postgres Implementations.
*
* @author Sonia Zorba {@literal <zorba at oats.inaf.it>}
*/
public interface DBBroker {
/**
* Returns the name of all schemata contained into the source database.
*/
List<String> getAllSchemaNames() throws SQLException;
/**
* Returns the name of all schemata which structure is compatible with a
* TAP_SCHEMA schema structure.
*
* @param allSchemas a list of all schemata names to use for searching;
* names must be real schemata names (not renamed).
List<String> getAllTAPSchemaNames(List<String> allSchemas) throws SQLException;
/**
* Try to guess the version of an existing TAP_SCHEMA analyzing its shallow
* structure (e.<!-- -->g.<!-- --> the presence of the set of columns
* defined into the related XML model).
*
* @param tapSchemaName the real TAP_SCHEMA name (not the renamed one).
* @return the name of the guessed TAP_SCHEMA version.
*/
String detectVersion(String tapSchemaName) throws SQLException;
/**
* Returns a list of all the schemata exposed by an existing TAP_SCHEMA.
* Queries the {@code TAP_SCHEMA.schemas} schema.
*
* @param tapSchemaName the real TAP_SCHEMA name (not the renamed one).
List<String> getExposedSchemas(String tapSchemaName) throws SQLException;
/**
* Returns all the tables owned by a schema, given its name.
*
* @param schemaName the real schema name (not the renamed one).
List<String> getAllTablesNames(String schemaName) throws SQLException;
/**
* Returns the table type ("table" or "view") for all the tables owned by a
* schema, given its name.
*
* @param schemaName the real schema name (not the renamed one).
* @return a {@code Map} having table names as keys and table types as
* values.
*/
Map<String, String> getAllTableTypes(String schemaName) throws SQLException;
/**
* Returns the list of the names of the columns contained in a given table.
*
* @param schemaName the real schema name (not the renamed one).
* @param tableName the name of the table.
List<String> getAllColumnsNames(String schemaName, String tableName) throws SQLException;
/**
* Returns the metadata of all the columns contained in a given table.
*
* @param schemaName the real schema name (not the renamed one).
* @param tableSimpleName the name of the table.
* @param tableModel the {@link TableModel} of the owner column if it is a
* TAP_SCHEMA table or the ObsCore table, null otherwise. This is used for
* consistency checking on these tables datatype.
* @param dataTypeMode the {@link DataTypeMode} used in the selected
* TAP_SCHEMA version; this is used only if the previous parameter is not
* null.
* @return a {@code Map} having the column names as keys and the column
* metadata as values.
*/
Map<String, Map<String, Object>> getAllColumnsMetadata(String schemaName, String tableSimpleName, TableModel tableModel, DataTypeMode dataTypeMode) throws SQLException;
/**
* Returns a list of all the foreign key relationships the columns of which
* are contained in a given schema.
*
* @param schemaName the schema name as exposed by the TAP_SCHEMA
* (eventually renamed).
* @param realSchemaName the real schema name (not renamed).
*/
List<Key> getKeys(TapSchema tapSchema, String schemaName, String realSchemaName) throws SQLException;
/**
* Retrieves TAP_SCHEMA items saved into an existing TAP_SCHEMA, for a given
* TAP_SCHEMA table, given its {@link TableModel}. For example, if the
* {@code TableModel} models the {@code columns} table, this method will
* return a list representing all the rows in the {@code columns} table.
*
* @param tapSchemaName the real TAP_SCHEMA name (not the renamed one).
* @param tableModel the model for the TAP_SCHEMA table to read.
* @return A {@code List} representing all the rows in a specific TAP_SCHEMA
* table. Each element of the list is a {@code Map} having column names as
* keys and row values as values.
*/
List<Map<String, Object>> getSavedItems(String tapSchemaName, TableModel tableModel) throws SQLException;
/**
* Inserts a new row in a TAP_SCHEMA table.
*
* @param tapSchemaName the real TAP_SCHEMA name (not the renamed one).
* @param entity the entity to insert (this is used to specify the table to
* use and the values to insert).
* @param conn the database connection.
*/
void insertItem(String tapSchemaName, TapSchemaEntity entity, Connection conn) throws SQLException;
/**
* Updates an existing row in a TAP_SCHEMA table.
*
* @param tapSchemaName the real TAP_SCHEMA name (not the renamed one).
* @param entity the entity to update (this is used to specify the table to
* use and the new values to insert).
* @param conn the database connection.
* @param whereCondition a SQL {@code WHERE} condition to add to the query.
* @param whereParams a sequence of parameters for the {@code WHERE}
* condition.
*/
void updateItem(String tapSchemaName, TapSchemaEntity entity, Connection conn, String whereCondition, Object... whereParams) throws SQLException;
/**
* Creates all the tables of a TAP_SCHEMA.
*
* @param tapSchemaName the real TAP_SCHEMA name (not the renamed one).
* @param tapSchemaModel the {@link SchemaModel} used to represent the
* TAP_SCHEMA schema.
*/
void createTapSchemaStructure(String tapSchemaName, SchemaModel tapSchemaModel) throws SQLException;
/**
* Creates all the tables of an ivoa schema.
*
* @param ivoaSchemaModel the {@link SchemaModel} used to represent the ivoa
* schema.
* @param realIvoaSchemaName the real name of the ivoa schema (not the
* renamed one).
*/
void createIvoaSchemaStructure(SchemaModel ivoaSchemaModel, String realIvoaSchemaName) throws SQLException;
/**
* Saves all the TAP_SCHEMA modifications into the database (creates a new
* TAP_SCHEMA or update an existing one).
*/
void save(TapSchema tapSchema) throws SQLException;
/**
* Create a new table into the database.
*
* @param schemaName the real schema name (not the renamed one).
* @param tableModel the {@link TableModel} representing the table to
* create.
*/
void createTable(String schemaName, TableModel tableModel) throws SQLException;
/**
* Alter an existing table adding a new column.
*
* @param columnHolder a model representing a reference to a column which
* doesn't exist yet.
* @param columnModel the model used for representing the column structure.
*/
void addColumn(ColumnHolder columnHolder, ColumnModel columnModel) throws SQLException;
/**
* Retrieves all the keys where the {@code from_table} or
* {@code target_table} properties start by a given parameter, which must be
* a schema name or a complete table name ({@code schema_name} plus
* {@code table_name}). In this way it is possible to select keys that needs
* to be removed both if the consistency checking mechanism has detected an
* inexistent schema or an inexistent table.
*
* @param tapSchemaName the real TAP_SCHEMA name (not the renamed one).
* @param like a string representing a schema name or a table complete name
* ({@code schema_name} plus {@code table_name}).
*
* @see it.inaf.ia2.tsm.ConsistencyChecks
*/
Set<String> getKeysToRemove(String tapSchemaName, String like) throws SQLException;
/**
* Deletes rows from the TAP_SCHEMA.
*
* @param keysToRemoveIds a {@code Set} of all the identifiers of the keys
* to remove; the logic used to create this set is inside the
* {@link it.inaf.ia2.tsm.TapSchemaMender} class.
*
* @see it.inaf.ia2.tsm.ConsistencyChecks
* @see it.inaf.ia2.tsm.TapSchemaMender
*/
void deleteUnexistingEntities(String tapSchemaName, ConsistencyChecks consistencyChecks, Set<String> keysToRemoveIds) throws SQLException;
/**
* Retrieves all the key identifiers related to an inexistent column.
*
* @param tapSchemaName the real TAP_SCHEMA name (not the renamed one).
* @param unexistingColumn a reference to the inexistent column.
* @return a {@code Set} of key identifier
*
* @see it.inaf.ia2.tsm.ConsistencyChecks
* @see it.inaf.ia2.tsm.TapSchemaMender
*/
Set<String> getKeysToRemoveFromUnexistingColumn(String tapSchemaName, ColumnHolder unexistingColumn) throws SQLException;
/**
* Update the (wrong) property value of column exposed by a TAP_SCHEMA.
*
* @param tapSchemaName the real TAP_SCHEMA name (not the renamed one).
* @param completeTableName the complete name of the table
* ({@code schema_name} plus {@code table_name}).
* @param columnName the name of the column.
* @param key the name of the TAP_SCHEMA column property.
* @param value the new value.
*
* @see it.inaf.ia2.tsm.ConsistencyChecks
* @see it.inaf.ia2.tsm.TapSchemaMender
*/
void updateTapSchemaColumnValue(String tapSchemaName, String completeTableName, String columnName, String key, Object value) throws SQLException;
/**
* Alter an existing TAP_SCHEMA or ObsCore column having an incoherent
* datatype according to its {@link ColumnModel}.
*
* @see it.inaf.ia2.tsm.ConsistencyChecks
* @see it.inaf.ia2.tsm.TapSchemaMender
*/
void alterDataType(String schemaName, String tableName, String columnName, String adqlDataType, Integer size) throws SQLException;