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/*
* _____________________________________________________________________________
*
* INAF - OATS National Institute for Astrophysics - Astronomical Observatory of
* Trieste INAF - IA2 Italian Center for Astronomical Archives
* _____________________________________________________________________________
*
* Copyright (C) 2016 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;
import it.inaf.ia2.tsm.datalayer.DatabaseType;
import it.inaf.ia2.tsm.datalayer.DBWrapper;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Utility class that contains static methods for managing {@link Key}s and
* {@link KeyColumn}s into the database.
*
* @author Sonia Zorba {@literal <zorba at oats.inaf.it>}
*/
public class DaoKey {
//
// private static final Logger log = LoggerFactory.getLogger(DaoKey.class);
//
// /**
// * Generate list of KeyEntity for a given schema, specifying its
// * <code>DataSource</code> and its name.<br>
// * <strong>IMPORTANT</strong>: this keys are without id. The id has to be
// * set when a table is added to a schema.
// */
// protected static List<Key> getSchemaKeys(DBWrapper dbWrapper, TapSchema tapSchema, String schemaName) throws SQLException {
//
// log.debug("getSchemaKeys");
//
// DataSource dataSource = TSMUtil.getSchemaDataSource(dbWrapper, tapSchema, schemaName);
// DatabaseType dbType = TSMUtil.getSchemaDatabaseType(dbWrapper, tapSchema, schemaName);
//
// if (dbType == DatabaseType.MYSQL) {
//
// Map<String, Key> schemaKeys = new HashMap<>();
//
// String query = "SELECT\n"
// + "c.`CONSTRAINT_NAME` AS constraint_name,\n"
// + "k.`TABLE_SCHEMA` AS from_schema,\n"
// + "k.`TABLE_NAME` AS from_table,\n"
// + "k.`COLUMN_NAME` AS from_column,\n"
// + "k.`REFERENCED_TABLE_SCHEMA` AS target_schema,\n"
// + "k.`REFERENCED_TABLE_NAME` AS target_table,\n"
// + "k.`REFERENCED_COLUMN_NAME` AS target_column\n"
// + "FROM information_schema.TABLE_CONSTRAINTS c \n"
// + "LEFT JOIN information_schema.KEY_COLUMN_USAGE k \n"
// + "ON c.`CONSTRAINT_NAME` = k.`CONSTRAINT_NAME` AND c.`TABLE_SCHEMA` = k.`TABLE_SCHEMA`\n"
// + "WHERE c.`CONSTRAINT_TYPE` = 'FOREIGN KEY' \n"
// + "AND k.`TABLE_SCHEMA` = '" + schemaName + "' OR k.`REFERENCED_TABLE_SCHEMA` = '" + schemaName + "'";
//
// try (Connection connection = dataSource.getConnection();
// Statement statement = connection.createStatement();
// ResultSet resultSet = statement.executeQuery(query)) {
//
// while (resultSet.next()) {
// String constraintName = resultSet.getString("constraint_name");
//
// Key key = schemaKeys.get(constraintName);
// if (key == null) {
// key = new Key(
// dbWrapper,
// tapSchema,
// resultSet.getString("from_schema"),
// resultSet.getString("from_table"),
// resultSet.getString("target_schema"),
// resultSet.getString("target_table")
// );
// schemaKeys.put(constraintName, key);
// }
//
// ((Key) key).addKeyColumn(resultSet.getString("from_column"), resultSet.getString("target_column"));
// }
// }
//
// return new ArrayList<>(schemaKeys.values());
//
// } else if (dbType == DatabaseType.POSTGRES) {
//
// String databaseName
// = schemaName.equals(tapSchema.getName())
// ? dbWrapper.getTapSchemaCredentials().getDatabase()
// : dbWrapper.getSourceCredentials().getDatabase();
//
// List<Key> schemaKeys = new ArrayList<>();
//
// String queryKeys = "SELECT\n"
// + "conname AS constraint_name,\n"
// + "conrelid::regclass AS from_table, \n"
// + "confrelid::regclass AS target_table\n"
// + "FROM pg_catalog.pg_constraint\n"
// + "WHERE contype = 'f'\n"
// + "AND ((conrelid::regclass || '' LIKE '" + schemaName + ".%')\n"
// + "OR (confrelid::regclass || '' LIKE '" + schemaName + ".%'))";
//
// try (Connection connection = dataSource.getConnection();
// Statement statement = connection.createStatement();
// ResultSet resultSet = statement.executeQuery(queryKeys)) {
//
// log.debug("Executing query {}", queryKeys);
//
// while (resultSet.next()) {
//
// String constraintName = resultSet.getString("constraint_name");
//
// String[] fromTableFullNameSplit = resultSet.getString("from_table").split(Pattern.quote("."));
// String fromSchema = fromTableFullNameSplit[0];
// String fromTable = fromTableFullNameSplit[1];
//
// String[] targetTableFullNameSplit = resultSet.getString("target_table").split(Pattern.quote("."));
// String targetSchema = targetTableFullNameSplit[0];
// String targetTable = targetTableFullNameSplit[1];
//
// Key key = new Key(dbWrapper, tapSchema, fromSchema, fromTable, targetSchema, targetTable);
// schemaKeys.add(key);
//
// // conkey conrelid
// String queryFromKC = "SELECT\n"
// + "c.column_name AS key_column\n"
// + "FROM information_schema.columns c\n"
// + "JOIN pg_catalog.pg_constraint r ON c.ordinal_position = ANY(r.conkey)\n"
// + "AND (c.table_schema || '.' || c.table_name) = (r.conrelid::regclass || '')\n"
// + "WHERE r.conname = '" + constraintName + "' AND r.contype = 'f'\n"
// + "AND c.table_schema = '" + fromSchema + "'\n"
// + "AND table_catalog = '" + databaseName + "'";
//
// // as above, but with confkey and confrelid and different c.table_schema where condition
// String queryTargetKC = "SELECT\n"
// + "c.column_name AS key_column\n"
// + "FROM information_schema.columns c\n"
// + "JOIN pg_catalog.pg_constraint r ON c.ordinal_position = ANY(r.confkey)\n"
// + "AND (c.table_schema || '.' || c.table_name) = (r.confrelid::regclass || '')\n"
// + "WHERE r.conname = '" + constraintName + "' AND r.contype = 'f'\n"
// + "AND c.table_schema = '" + targetSchema + "'\n"
// + "AND table_catalog = '" + databaseName + "'";
//
// try (Statement statFromKC = connection.createStatement();
// Statement statTargetKC = connection.createStatement()) {
//
// try (ResultSet rsFromKC = statFromKC.executeQuery(queryFromKC);
// ResultSet rsTargetKC = statTargetKC.executeQuery(queryTargetKC)) {
//
// log.debug("Executing query {}", queryFromKC);
// log.debug("Executing query {}", queryTargetKC);
//
// while (rsFromKC.next()) {
// if (rsTargetKC.next()) {
// ((Key) key).addKeyColumn(
// rsFromKC.getString("key_column"),
// rsTargetKC.getString("key_column")
// );
// }
// }
// }
// }
// }
// }
//
// return schemaKeys;
// } else {
// throw new UnsupportedOperationException("Database type " + dbType + " not supported");
// }
// }
//
// /**
// * Retrieves saved {@code Key}s from the database and add them into the
// * specified {@code TapSchema}.
// */
// protected static void fillSavedKeys(DBWrapper dbWrapper, TapSchema tapSchema) throws SQLException {
//
// log.debug("fillSavedKeys");
//
// // We can decide to work only on from tables or target tables, because
// // the same key is contained on both.
// // Schemas and tables have to be already added to the TAP_SCHEMA.
// List<Key> allVisibleKeys = new ArrayList<>();
//
// // Reset to null all generated keyId.
// for (Key key : ((TapSchema) tapSchema).getAllKeys()) {
// key.initProperty(Key.ID_KEY, null);
//
// // Meanwhile we add all the visible keys to this list for
// // further checks
// if (key.isVisible()) {
// allVisibleKeys.add(key);
// }
// }
//
// // Building query for the keys table
// SelectQueryBuilder keysSelect = new SelectQueryBuilder(dbWrapper.getTapSchemaDatabaseType(), tapSchema, TapSchema.KEYS_TABLE) {
// @Override
// protected TapSchemaEntity getEntity(ResultSet rs) throws SQLException {
// throw new UnsupportedOperationException();
// }
// };
// String queryKeys = keysSelect.getQuery();
//
// // Building query for the key_columns table
// SelectQueryBuilder keyColumnsSelect = new SelectQueryBuilder(dbWrapper.getTapSchemaDatabaseType(), tapSchema, TapSchema.KEY_COLUMNS_TABLE) {
// @Override
// protected TapSchemaEntity getEntity(ResultSet rs) throws SQLException {
// throw new UnsupportedOperationException();
// }
// };
// String queryKeyColumns = String.format("%s WHERE %s = ?",
// keyColumnsSelect.getQuery(),
// TSMUtil.escapeName(KeyColumn.KEY_ID_KEY, dbWrapper.getTapSchemaDatabaseType()));
//
// boolean supportKeyID = EntityPropertyInfo.getEntityPropertyInfo(TapSchema.KEYS_TABLE, Key.KEY_ID_KEY).acceptVersion(tapSchema.getVersion());
// boolean supportKeyColumnID = EntityPropertyInfo.getEntityPropertyInfo(TapSchema.KEY_COLUMNS_TABLE, KeyColumn.KEY_COLUMN_ID_KEY).acceptVersion(tapSchema.getVersion());
//
// try (Connection conn = dbWrapper.getTapSchemaConnection()) {
//
// log.debug("Executing query {}", queryKeys);
//
// // ResultSet type and concurrency are necessary for PostgreSQL
// try (Statement statementKeys = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
// ResultSet rsKeys = statementKeys.executeQuery(queryKeys)) {
//
// while (rsKeys.next()) {
// // Searching the keys.
//
// String keyId = rsKeys.getString(Key.ID_KEY);
// String fromTableCompleteNameSplit[] = rsKeys.getString(Key.FROM_TABLE_KEY).split(Pattern.quote("."));
// String fromSchemaName = fromTableCompleteNameSplit[0];
// String fromTableName = fromTableCompleteNameSplit[1];
//
// Schema fromSchema = tapSchema.getChild(fromSchemaName);
//
// if (fromSchema == null) {
// tapSchema.getConsistencyChecks().addUnexistingKey(keyId);
// } else {
// Table fromTable = fromSchema.getChild(fromTableName);
// if (fromTable == null) {
// tapSchema.getConsistencyChecks().addUnexistingKey(keyId);
// } else {
// // ResultSet type and concurrency are necessary for PostgreSQL
// try (PreparedStatement statementKeyColumns = conn.prepareStatement(queryKeyColumns, ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE)) {
//
// statementKeyColumns.setString(1, keyId);
// log.debug("Executing query {} [key_id={}]", queryKeyColumns, keyId);
//
// try (ResultSet rsKeyColumns = statementKeyColumns.executeQuery()) {
// for (Key fromKey : fromTable.getAllFromKeys()) {
//
// boolean columnsFound = false;
//
// for (KeyColumn keyColumn : fromKey.getKeyColumns()) {
// columnsFound = false;
//
// rsKeyColumns.beforeFirst();
// while (rsKeyColumns.next()) {
// String fromColumn = rsKeyColumns.getString(KeyColumn.FROM_COLUMN_KEY);
// String targetColumn = rsKeyColumns.getString(KeyColumn.TARGET_COLUMN_KEY);
// if (keyColumn.getFromColumn().equals(fromColumn)
// && keyColumn.getTargetColumn().equals(targetColumn)) {
// columnsFound = true;
// break;
// }
// }
// if (!columnsFound) {
// break;
// }
// }
//
// if (columnsFound) {
// // all columns found --> key found!
//
// // Updating key
// String keyDescription = rsKeys.getString(Key.DESCRIPTION_KEY);
// String keyUtype = rsKeys.getString(Key.UTYPE_KEY);
//
// fromKey.initProperty(Key.ID_KEY, keyId);
// fromKey.initProperty(Key.DESCRIPTION_KEY, keyDescription);
// fromKey.initProperty(Key.UTYPE_KEY, keyUtype);
// if (supportKeyID) {
// fromKey.initProperty(Key.KEY_ID_KEY, TSMUtil.getObject(rsKeys, Key.KEY_ID_KEY, Long.class));
// }
// ((Key) fromKey).setVisible(true);
//
// // Updating key columns
// for (KeyColumn keyColumn : fromKey.getKeyColumns()) {
// rsKeyColumns.beforeFirst();
// while (rsKeyColumns.next()) {
// String fromColumn = rsKeyColumns.getString(KeyColumn.FROM_COLUMN_KEY);
// String targetColumn = rsKeyColumns.getString(KeyColumn.TARGET_COLUMN_KEY);
// if (keyColumn.getFromColumn().equals(fromColumn)
// && keyColumn.getTargetColumn().equals(targetColumn)) {
// keyColumn.initProperty(KeyColumn.KEY_ID_KEY, keyId);
// if (supportKeyColumnID) {
// keyColumn.initProperty(KeyColumn.KEY_COLUMN_ID_KEY, TSMUtil.getObject(rsKeyColumns, KeyColumn.KEY_COLUMN_ID_KEY, Long.class));
// }
// break;
// }
// }
// }
//
// break;
// }
// }
// }
// }
// }
// }
// }
//
// // Check if the saved TAP_SCHEMA contains keys that aren't loaded (fictitious keys).
// List<Key> fictitiousKeys = new ArrayList<>();
//
// rsKeys.beforeFirst();
// while (rsKeys.next()) {
// String keyId = rsKeys.getString(Key.ID_KEY);
// boolean keyIdFound = false;
// for (Key key : allVisibleKeys) {
// if (keyId.equals(key.getId())) {
// keyIdFound = true;
// break;
// }
// }
// if (!keyIdFound && !tapSchema.getConsistencyChecks().getUnexistingKeys().contains(keyId)) {
// String fromTableCompleteName = rsKeys.getString(Key.FROM_TABLE_KEY);
// String targetTableCompleteName = rsKeys.getString(Key.TARGET_TABLE_KEY);
// Key key = new Key(dbWrapper, tapSchema, fromTableCompleteName, targetTableCompleteName);
// key.initProperty(Key.ID_KEY, keyId);
// if (supportKeyID) {
// key.initProperty(Key.KEY_ID_KEY, TSMUtil.getObject(rsKeys, Key.KEY_ID_KEY, Long.class));
// }
// key.setVisible(true);
// fictitiousKeys.add(key);
//
// tapSchema.getChild(key.getFromSchemaName()).getChild(key.getFromTableSimpleName()).addFromKey(key);
// tapSchema.getChild(key.getTargetSchemaName()).getChild(key.getTargetTableSimpleName()).addTargetKey(key);
// }
// }
//
// // filling fictitious keys columns
// for (Key key : fictitiousKeys) {
// try (PreparedStatement statementKeyColumns = conn.prepareStatement(queryKeyColumns)) {
//
// String keyId = key.getId();
// statementKeyColumns.setString(1, keyId);
// log.debug("Executing query {} [key_id={}]", queryKeyColumns, keyId);
//
// try (ResultSet rsKeyColumns = statementKeyColumns.executeQuery()) {
//
// while (rsKeyColumns.next()) {
// String fromColumn = rsKeyColumns.getString(KeyColumn.FROM_COLUMN_KEY);
// String targetColumn = rsKeyColumns.getString(KeyColumn.TARGET_COLUMN_KEY);
//
// KeyColumn keyColumn = ((Key) key).addKeyColumn(fromColumn, targetColumn);
// if (supportKeyColumnID) {
// keyColumn.initProperty(KeyColumn.KEY_COLUMN_ID_KEY, TSMUtil.getObject(rsKeyColumns, KeyColumn.KEY_COLUMN_ID_KEY, Long.class));
// }
// }
// }
// }
//
// // adding fictitious key to key set
// ((TapSchema) tapSchema).getAllKeys().add(key);
// }
//
// if (!fictitiousKeys.isEmpty()) {
// log.debug("{} fictitious keys found", fictitiousKeys.size());
// for (Key key : fictitiousKeys) {
// log.debug(" {}", key);
// }
// }
//
// // Check if there are remaining keys with keyId = null (valid keys
// // that weren't saved into the TAP_SCHEMA).
// int keyId = ((TapSchema) tapSchema).getMaxKeyId() + 1;
// for (Key key : allVisibleKeys) {
// if (key.getId() == null) {
// key.setId(keyId + "");
// keyId++;
// }
// }
// }
// }
// }
//
// /**
// * Save a new {@code Key} into the TAP_SCHEMA schema.
// */
// protected static void insertNewKey(DatabaseType dbType, Connection connection, TapSchema tapSchema, Key key) throws SQLException {
// log.debug("insertNewKey");
//
// InsertQueryBuilder insertQueryBuilder = new InsertQueryBuilder(dbType, tapSchema, key, TapSchema.KEYS_TABLE);
// insertQueryBuilder.executeQuery(connection);
//
// for (KeyColumn keyColumn : key.getKeyColumns()) {
// insertQueryBuilder = new InsertQueryBuilder(dbType, tapSchema, keyColumn, TapSchema.KEY_COLUMNS_TABLE);
// insertQueryBuilder.executeQuery(connection);
// }
// }
//
// /**
// * Updates an existing {@code Key}.
// */
// protected static void updateKey(DatabaseType dbType, Connection connection, TapSchema tapSchema, Key key) throws SQLException {
// log.debug("updateKey");
//
// if (key.getId() == null) {
// throw new IllegalStateException("Unable to update key: key_id is null");
// }
//
// boolean keyIdChanged = key.isChanged(Key.ID_KEY);
//
// if (keyIdChanged) {
// // Deleting key columns to avoid problem with foreign key constraint failures
//
// String tapSchemaNameEscaped = TSMUtil.escapeName(tapSchema.getName(), dbType);
// String keyColumnsNameEscaped = TSMUtil.escapeName("key_columns", dbType);
//
// String query = String.format("DELETE FROM %s.%s WHERE key_id = ?", tapSchemaNameEscaped, keyColumnsNameEscaped);
//
// try (PreparedStatement statement = connection.prepareStatement(query)) {
// String originalKey = key.getOriginalValue(Key.ID_KEY, String.class);
// statement.setString(1, originalKey);
// log.debug("Executing query {} [key_id={}]", query, originalKey);
// statement.executeUpdate();
// }
// }
//
// // Updating keys
// UpdateQueryBuilder updateQueryBuilder = new UpdateQueryBuilder(dbType, tapSchema, key, TapSchema.KEYS_TABLE, "key_id = ?");
// String query = updateQueryBuilder.getQuery();
// try (PreparedStatement statement = connection.prepareStatement(query)) {
// int i = updateQueryBuilder.addStatementValues(statement);
// String keyId = key.getId();
// statement.setString(i, keyId);
// log.debug("Executing query {} [key_id={}]", query, keyId);
// statement.executeUpdate();
// }
//
// if (keyIdChanged) {
// // Re-insert deleted key columns
// for (KeyColumn keyColumn : key.getKeyColumns()) {
// InsertQueryBuilder insertQueryBuilder = new InsertQueryBuilder(dbType, tapSchema, keyColumn, TapSchema.KEY_COLUMNS_TABLE);
// insertQueryBuilder.executeQuery(connection);
// }
// } else {
// // Update key columns
// for (KeyColumn keyColumn : key.getKeyColumns()) {
// if (keyColumn.isChanged()) {
// updateQueryBuilder = new UpdateQueryBuilder(dbType, tapSchema, keyColumn, TapSchema.KEY_COLUMNS_TABLE, "key_id = ?");
// query = updateQueryBuilder.getQuery();
// try (PreparedStatement statement = connection.prepareStatement(query)) {
// int i = updateQueryBuilder.addStatementValues(statement);
// String keyId = key.getId();
// statement.setString(i, keyId);
// log.debug("Executing query {} [key_id={}]", query, keyId);
// statement.executeUpdate();
// }
// }
// }
// }
// }
}