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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.
*/
Sonia Zorba
committed
package it.inaf.ia2.tsm.api;
Sonia Zorba
committed
import it.inaf.ia2.tsm.api.contract.DatabaseType;
import it.inaf.ia2.tsm.api.contract.Column;
import it.inaf.ia2.tsm.api.contract.Status;
import it.inaf.ia2.tsm.api.contract.Table;
import it.inaf.ia2.tsm.api.contract.TapSchema;
import it.inaf.ia2.tsm.api.contract.TapSchemaEntity;
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.List;
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 Column}s into
* the database.
*
* @author Sonia Zorba {@literal <zorba at oats.inaf.it>}
*/
public class DaoColumn {
private static final Logger log = LoggerFactory.getLogger(DaoColumn.class);
private static boolean equalsOneOf(String string, String... values) {
for (String value : values) {
if (string.equals(value)) {
return true;
}
}
return false;
}
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/**
* Returns the list of all the columns names given a schema name and a table
* name, also if these objects have never been added into the TAP_SCHEMA.
* This can be useful to retrieve the source database structure.
*/
public static List<String> getAllColumnsNames(DBWrapper dbWrapper, TapSchema tapSchema, String schemaName, String tableSimpleName) throws SQLException {
final List<String> allColumns = new ArrayList<>();
DataSource dataSource = TSMUtil.getSchemaDataSource(dbWrapper, tapSchema, schemaName);
DatabaseType dbType = TSMUtil.getSchemaDatabaseType(dbWrapper, tapSchema, schemaName);
String query;
if (dbType == DatabaseType.MYSQL) {
query = String.format("SHOW COLUMNS FROM `%s`.`%s`", schemaName, tableSimpleName);
} else if (dbType == DatabaseType.POSTGRES) {
query = "SELECT column_name FROM information_schema.columns WHERE table_schema = '" + schemaName + "' AND table_name = '" + tableSimpleName + "'";
} else {
throw new UnsupportedOperationException("Database type " + dbType + " not supported");
}
log.debug("Executing query {}", query);
try (Connection connection = dataSource.getConnection();
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(query)) {
while (resultSet.next()) {
String columnName;
if (dbType == DatabaseType.MYSQL) {
columnName = resultSet.getString("Field");
} else if (dbType == DatabaseType.POSTGRES) {
columnName = resultSet.getString("column_name");
} else {
throw new UnsupportedOperationException("Database type " + dbType + " not supported");
}
allColumns.add(columnName);
}
}
return allColumns;
}
/**
* For performance reasons all columns of a {@link Table} are loaded
* together using this method. Columns {@link Status} is at first set as
* {@code LOADED}.
*/
protected static List<Column> loadAllTableColumns(DBWrapper dbWrapper, TapSchema tapSchema, String schemaName, Table table) throws SQLException {
String tableSimpleName = table.getName();
final List<Column> allColumns = new ArrayList<>();
DataSource dataSource = TSMUtil.getSchemaDataSource(dbWrapper, tapSchema, schemaName);
DatabaseType dbType = TSMUtil.getSchemaDatabaseType(dbWrapper, tapSchema, schemaName);
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String query;
if (dbType == DatabaseType.MYSQL) {
query = String.format("SHOW COLUMNS FROM `%s`.`%s`", schemaName, tableSimpleName);
} else if (dbType == DatabaseType.POSTGRES) {
query = "SELECT c.column_name, c.data_type, r.contype AS column_type, c.character_maximum_length, c.numeric_precision\n" //, c.numeric_precision_radix
+ "FROM information_schema.columns c\n"
+ "JOIN pg_catalog.pg_tables t ON c.table_schema = t.schemaname AND c.table_name = t.tablename\n"
+ "LEFT JOIN pg_catalog.pg_constraint r ON c.ordinal_position = ANY(r.conkey) AND r.conrelid = (t.schemaname || '.' || t.tablename)::regclass::oid\n"
+ "WHERE t.schemaname = '" + schemaName + "' AND t.tablename = '" + tableSimpleName + "'";
} else {
throw new UnsupportedOperationException("Database type " + dbType + " not supported");
}
log.debug("Executing query {}", query);
try (Connection connection = dataSource.getConnection();
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(query)) {
while (resultSet.next()) {
String columnName;
if (dbType == DatabaseType.MYSQL) {
columnName = resultSet.getString("Field");
} else if (dbType == DatabaseType.POSTGRES) {
columnName = resultSet.getString("column_name");
} else {
throw new UnsupportedOperationException("Database type " + dbType + " not supported");
}
boolean indexed = false, primaryKey = false;
// Key type
if (dbType == DatabaseType.MYSQL) {
String key = resultSet.getString("Key");
primaryKey = key.equals("PRI");
indexed = equalsOneOf(key, "PRI", "UNI", "MUL");
} else if (dbType == DatabaseType.POSTGRES) {
String columnType = resultSet.getString("column_type");
if (columnType != null) {
primaryKey = "p".equals(columnType);
indexed = equalsOneOf(columnType, "p", "f", "u");
}
} else {
throw new UnsupportedOperationException("Database type " + dbType + " not supported");
}
// Datatype and Size
int size = 0;
String datatype;
if (dbType == DatabaseType.MYSQL) {
String type = resultSet.getString("Type").toLowerCase();
if (type.startsWith("int")) {
datatype = "adql:INTEGER";
} else if (type.startsWith("smallint")) {
datatype = "adql:SMALLINT";
} else if (type.startsWith("bigint")) {
datatype = "adql:BIGINT";
} else if (type.startsWith("float")) {
datatype = "adql:REAL";
} else if (type.startsWith("char")) {
int beginIndex = type.indexOf('(');
int endIndex = type.indexOf(')');
size = Integer.parseInt(type.substring(beginIndex + 1, endIndex));
datatype = "adql:CHAR";
} else if (type.startsWith("varchar")) {
int beginIndex = type.indexOf('(');
int endIndex = type.indexOf(')');
size = Integer.parseInt(type.substring(beginIndex + 1, endIndex));
datatype = "adql:VARCHAR";
} else if (type.contains("timestamp")) {
datatype = "adql:TIMESTAMP";
} else {
datatype = "adql:" + type.toUpperCase();
}
} else if (dbType == DatabaseType.POSTGRES) {
String type = resultSet.getString("data_type");
if (type.startsWith("int")) {
datatype = "adql:INTEGER";
} else if (type.startsWith("smallint")) {
datatype = "adql:SMALLINT";
} else if (type.startsWith("bigint")) {
datatype = "adql:BIGINT";
} else if (type.startsWith("double") || type.startsWith("real")) {
datatype = "adql:REAL";
} else if (type.startsWith("character varying")) {
datatype = "adql:VARCHAR";
size = resultSet.getInt("character_maximum_length");
} else if (type.startsWith("char")) {
datatype = "adql:CHAR";
size = resultSet.getInt("character_maximum_length");
} else if (type.contains("timestamp")) {
datatype = "adql:TIMESTAMP";
} else {
datatype = "adql:" + type.toUpperCase();
}
} else {
throw new UnsupportedOperationException("Database type " + dbType + " not supported");
}
Integer arraySize = null; // TODO (v 1.1)
Column column = new ColumnImpl(dbWrapper, tapSchema, table, columnName, indexed, primaryKey, datatype, size, arraySize);
allColumns.add(column);
}
}
return allColumns;
}
/**
* Retrieves saved {@code Column}s from the database and add them into the
* specified {@code TapSchema}.
*/
protected static void fillSavedColumns(DBWrapper dbWrapper, final TapSchema tapSchema) throws SQLException {
log.debug("fillSavedColumns");
SelectQueryBuilder selectQueryBuilder = new SelectQueryBuilder(dbWrapper.getTapSchemaDatabaseType(), tapSchema, TapSchema.COLUMNS_TABLE) {
@Override
protected TapSchemaEntity getEntity(ResultSet rs) throws SQLException {
String tableCompleteName = rs.getString("table_name");
String columnName = rs.getString("column_name");
String[] tableNameSplit = tableCompleteName.split(Pattern.quote("."));
String schemaName = tableNameSplit[0];
String tableSimpleName = tableNameSplit[1];
Table table = tapSchema.getChild(schemaName).getChild(tableSimpleName);
if (table == null) {
return null;
}
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Column column = table.addChild(columnName);
column.setStatus(Status.ADDED_PERSISTED);
return column;
}
};
selectQueryBuilder.executeQuery(dbWrapper.getTapSchemaConnection());
}
/**
* Save a new {@code Column} into the TAP_SCHEMA schema.
*/
protected static void insertNewColumn(DatabaseType dbType, Connection connection, TapSchema tapSchema, Column column) throws SQLException {
log.debug("insertNewColumn");
InsertQueryBuilder insertQueryBuilder = new InsertQueryBuilder(dbType, tapSchema, column, TapSchema.COLUMNS_TABLE);
insertQueryBuilder.executeQuery(connection);
}
/**
* Updates an existing {@code Column}.
*/
protected static void updateColumn(DatabaseType dbType, Connection connection, TapSchema tapSchema, Column column) throws SQLException {
UpdateQueryBuilder updateQueryBuilder = new UpdateQueryBuilder(dbType, tapSchema, column, TapSchema.COLUMNS_TABLE, "column_name = ? AND table_name = ?");
String query = updateQueryBuilder.getQuery();
try (PreparedStatement statement = connection.prepareStatement(query)) {
log.debug("Executing query {}", query);
int i = updateQueryBuilder.addStatementValues(statement);
statement.setString(i, column.getName());
statement.setString(i + 1, column.getTableCompleteName());
statement.executeUpdate();
}
}
}