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/*
* Copyright 2004-2011 H2 Group.
* Copyright 2011 James Moger.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.iciql.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import javax.naming.Context;
import javax.sql.DataSource;
import javax.sql.XAConnection;
/**
* This is a utility class with JDBC helper functions.
*/
public class JdbcUtils {
private static final String[] DRIVERS = { "h2:", "org.h2.Driver", "Cache:",
"com.intersys.jdbc.CacheDriver", "daffodilDB://", "in.co.daffodil.db.rmi.RmiDaffodilDBDriver",
"daffodil", "in.co.daffodil.db.jdbc.DaffodilDBDriver", "db2:", "COM.ibm.db2.jdbc.net.DB2Driver",
"derby:net:", "org.apache.derby.jdbc.ClientDriver", "derby://",
"org.apache.derby.jdbc.ClientDriver", "derby:", "org.apache.derby.jdbc.EmbeddedDriver",
"FrontBase:", "com.frontbase.jdbc.FBJDriver", "firebirdsql:", "org.firebirdsql.jdbc.FBDriver",
"hsqldb:", "org.hsqldb.jdbcDriver", "informix-sqli:", "com.informix.jdbc.IfxDriver", "jtds:",
"net.sourceforge.jtds.jdbc.Driver", "microsoft:", "com.microsoft.jdbc.sqlserver.SQLServerDriver",
"mimer:", "com.mimer.jdbc.Driver", "mysql:", "com.mysql.jdbc.Driver", "odbc:",
"sun.jdbc.odbc.JdbcOdbcDriver", "oracle:", "oracle.jdbc.driver.OracleDriver", "pervasive:",
"com.pervasive.jdbc.v2.Driver", "pointbase:micro:", "com.pointbase.me.jdbc.jdbcDriver",
"pointbase:", "com.pointbase.jdbc.jdbcUniversalDriver", "postgresql:", "org.postgresql.Driver",
"sybase:", "com.sybase.jdbc3.jdbc.SybDriver", "sqlserver:",
"com.microsoft.sqlserver.jdbc.SQLServerDriver", "teradata:", "com.ncr.teradata.TeraDriver", };
private JdbcUtils() {
// utility class
}
/**
* Close a statement without throwing an exception.
*
* @param stat
* the statement or null
*/
public static void closeSilently(Statement stat) {
if (stat != null) {
try {
stat.close();
} catch (SQLException e) {
// ignore
}
}
}
/**
* Close a connection without throwing an exception.
*
* @param conn
* the connection or null
*/
public static void closeSilently(Connection conn) {
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
// ignore
}
}
}
/**
* Close a result set without throwing an exception.
*
* @param rs
* the result set or null
*/
public static void closeSilently(ResultSet rs) {
closeSilently(rs, false);
}
/**
* Close a result set, and optionally its statement without throwing an
* exception.
*
* @param rs
* the result set or null
*/
public static void closeSilently(ResultSet rs, boolean closeStatement) {
if (rs != null) {
Statement stat = null;
if (closeStatement) {
try {
stat = rs.getStatement();
} catch (SQLException e) {
// ignore
}
}
try {
rs.close();
} catch (SQLException e) {
// ignore
}
closeSilently(stat);
}
}
/**
* Close an XA connection set without throwing an exception.
*
* @param conn
* the XA connection or null
*/
public static void closeSilently(XAConnection conn) {
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
// ignore
}
}
}
/**
* Open a new database connection with the given settings.
*
* @param driver
* the driver class name
* @param url
* the database URL
* @param user
* the user name
* @param password
* the password
* @return the database connection
*/
public static Connection getConnection(String driver, String url, String user, String password)
throws SQLException {
Properties prop = new Properties();
if (user != null) {
prop.setProperty("user", user);
}
if (password != null) {
prop.setProperty("password", password);
}
return getConnection(driver, url, prop);
}
/**
* Escape table or schema patterns used for DatabaseMetaData functions.
*
* @param pattern
* the pattern
* @return the escaped pattern
*/
public static String escapeMetaDataPattern(String pattern) {
if (pattern == null || pattern.length() == 0) {
return pattern;
}
return StringUtils.replaceAll(pattern, "\\", "\\\\");
}
/**
* Open a new database connection with the given settings.
*
* @param driver
* the driver class name
* @param url
* the database URL
* @param prop
* the properties containing at least the user name and password
* @return the database connection
*/
public static Connection getConnection(String driver, String url, Properties prop) throws SQLException {
if (StringUtils.isNullOrEmpty(driver)) {
JdbcUtils.load(url);
} else {
Class<?> d = Utils.loadClass(driver);
if (java.sql.Driver.class.isAssignableFrom(d)) {
return DriverManager.getConnection(url, prop);
} else if (javax.naming.Context.class.isAssignableFrom(d)) {
// JNDI context
try {
Context context = (Context) d.newInstance();
DataSource ds = (DataSource) context.lookup(url);
String user = prop.getProperty("user");
String password = prop.getProperty("password");
if (StringUtils.isNullOrEmpty(user) && StringUtils.isNullOrEmpty(password)) {
return ds.getConnection();
}
return ds.getConnection(user, password);
} catch (SQLException e) {
throw e;
} catch (Exception e) {
throw new SQLException("Failed to get connection for " + url, e);
}
} else {
// Don't know, but maybe it loaded a JDBC Driver
return DriverManager.getConnection(url, prop);
}
}
return DriverManager.getConnection(url, prop);
}
/**
* Get the driver class name for the given URL, or null if the URL is
* unknown.
*
* @param url
* the database URL
* @return the driver class name
*/
public static String getDriver(String url) {
if (url.startsWith("jdbc:")) {
url = url.substring("jdbc:".length());
for (int i = 0; i < DRIVERS.length; i += 2) {
String prefix = DRIVERS[i];
if (url.startsWith(prefix)) {
return DRIVERS[i + 1];
}
}
}
return null;
}
/**
* Load the driver class for the given URL, if the database URL is known.
*
* @param url
* the database URL
*/
public static void load(String url) {
String driver = getDriver(url);
if (driver != null) {
Utils.loadClass(driver);
}
}
}
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