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Apache Commons DBCP software implements Database Connection Pooling
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.commons.dbcp2;
import java.io.InputStream;
import java.io.Reader;
import java.math.BigDecimal;
import java.net.URL;
import java.sql.Array;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.Date;
import java.sql.Ref;
import java.sql.ResultSet;
import java.sql.RowId;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.sql.SQLXML;
import java.sql.Statement;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.concurrent.Executor;
import java.util.logging.Logger;
import javax.sql.CommonDataSource;
/**
* Defines bridge methods to JDBC 4.1 (Java 7) methods to allow call sites to operate safely (without
* {@link AbstractMethodError}) when using a JDBC driver written for JDBC 4.0 (Java 6).
*
* @since 2.6.0
*/
public class Jdbc41Bridge {
/**
* Delegates to {@link Connection#abort(Executor)} without throwing an {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link Connection#abort(Executor)}, then call {@link Connection#close()}.
*
*
* @param connection
* the receiver
* @param executor
* See {@link Connection#abort(Executor)}.
* @throws SQLException
* See {@link Connection#abort(Executor)}.
* @see Connection#abort(Executor)
*/
public static void abort(final Connection connection, final Executor executor) throws SQLException {
try {
connection.abort(executor);
} catch (final AbstractMethodError e) {
connection.close();
}
}
/**
* Delegates to {@link DatabaseMetaData#generatedKeyAlwaysReturned()} without throwing a
* {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link DatabaseMetaData#generatedKeyAlwaysReturned()}, then return false.
*
*
* @param databaseMetaData
* See {@link DatabaseMetaData#generatedKeyAlwaysReturned()}
* @return See {@link DatabaseMetaData#generatedKeyAlwaysReturned()}
* @throws SQLException
* See {@link DatabaseMetaData#generatedKeyAlwaysReturned()}
* @see DatabaseMetaData#generatedKeyAlwaysReturned()
*/
public static boolean generatedKeyAlwaysReturned(final DatabaseMetaData databaseMetaData) throws SQLException {
try {
return databaseMetaData.generatedKeyAlwaysReturned();
} catch (final AbstractMethodError e) {
// do nothing
return false;
}
}
/**
* Delegates to {@link Connection#getNetworkTimeout()} without throwing an {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link Connection#getNetworkTimeout()}, then return 0.
*
*
* @param connection
* the receiver
* @return See {@link Connection#getNetworkTimeout()}
* @throws SQLException
* See {@link Connection#getNetworkTimeout()}
* @see Connection#getNetworkTimeout()
*/
public static int getNetworkTimeout(final Connection connection) throws SQLException {
try {
return connection.getNetworkTimeout();
} catch (final AbstractMethodError e) {
return 0;
}
}
/**
* Delegates to {@link ResultSet#getObject(int, Class)} without throwing an {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link ResultSet#getObject(int, Class)}, then return 0.
*
*
* @param
* See {@link ResultSet#getObject(int, Class)}
* @param resultSet
* See {@link ResultSet#getObject(int, Class)}
* @param columnIndex
* See {@link ResultSet#getObject(int, Class)}
* @param type
* See {@link ResultSet#getObject(int, Class)}
* @return See {@link ResultSet#getObject(int, Class)}
* @throws SQLException
* See {@link ResultSet#getObject(int, Class)}
* @see ResultSet#getObject(int, Class)
*/
@SuppressWarnings("unchecked")
public static T getObject(final ResultSet resultSet, final int columnIndex, final Class type)
throws SQLException {
try {
return resultSet.getObject(columnIndex, type);
} catch (final AbstractMethodError e) {
if (type == String.class) {
return (T) resultSet.getString(columnIndex);
}
// Numbers
if (type == Integer.class) {
return (T) Integer.valueOf(resultSet.getInt(columnIndex));
}
if (type == Long.class) {
return (T) Long.valueOf(resultSet.getLong(columnIndex));
}
if (type == Double.class) {
return (T) Double.valueOf(resultSet.getDouble(columnIndex));
}
if (type == Float.class) {
return (T) Float.valueOf(resultSet.getFloat(columnIndex));
}
if (type == Short.class) {
return (T) Short.valueOf(resultSet.getShort(columnIndex));
}
if (type == BigDecimal.class) {
return (T) resultSet.getBigDecimal(columnIndex);
}
if (type == Byte.class) {
return (T) Byte.valueOf(resultSet.getByte(columnIndex));
}
// Dates
if (type == Date.class) {
return (T) resultSet.getDate(columnIndex);
}
if (type == Time.class) {
return (T) resultSet.getTime(columnIndex);
}
if (type == Timestamp.class) {
return (T) resultSet.getTimestamp(columnIndex);
}
// Streams
if (type == InputStream.class) {
return (T) resultSet.getBinaryStream(columnIndex);
}
if (type == Reader.class) {
return (T) resultSet.getCharacterStream(columnIndex);
}
// Other
if (type == Object.class) {
return (T) resultSet.getObject(columnIndex);
}
if (type == Boolean.class) {
return (T) Boolean.valueOf(resultSet.getBoolean(columnIndex));
}
if (type == Array.class) {
return (T) resultSet.getArray(columnIndex);
}
if (type == Blob.class) {
return (T) resultSet.getBlob(columnIndex);
}
if (type == Clob.class) {
return (T) resultSet.getClob(columnIndex);
}
if (type == Ref.class) {
return (T) resultSet.getRef(columnIndex);
}
if (type == RowId.class) {
return (T) resultSet.getRowId(columnIndex);
}
if (type == SQLXML.class) {
return (T) resultSet.getSQLXML(columnIndex);
}
if (type == URL.class) {
return (T) resultSet.getURL(columnIndex);
}
throw new SQLFeatureNotSupportedException(
String.format("resultSet=%s, columnIndex=%,d, type=%s", resultSet, columnIndex, type));
}
}
/**
* Delegates to {@link ResultSet#getObject(String, Class)} without throwing an {@link AbstractMethodError}.
*
* @param
* See {@link ResultSet#getObject(String, Class)}
* @param resultSet
* See {@link ResultSet#getObject(String, Class)}
* @param columnLabel
* See {@link ResultSet#getObject(String, Class)}
* @param type
* See {@link ResultSet#getObject(String, Class)}
* @return See {@link ResultSet#getObject(String, Class)}
* @throws SQLException
* See {@link ResultSet#getObject(String, Class)}
* @see ResultSet#getObject(int, Class)
*/
@SuppressWarnings("unchecked")
public static T getObject(final ResultSet resultSet, final String columnLabel, final Class type)
throws SQLException {
try {
return resultSet.getObject(columnLabel, type);
} catch (final AbstractMethodError e) {
// Numbers
if (type == Integer.class) {
return (T) Integer.valueOf(resultSet.getInt(columnLabel));
}
if (type == Long.class) {
return (T) Long.valueOf(resultSet.getLong(columnLabel));
}
if (type == Double.class) {
return (T) Double.valueOf(resultSet.getDouble(columnLabel));
}
if (type == Float.class) {
return (T) Float.valueOf(resultSet.getFloat(columnLabel));
}
if (type == Short.class) {
return (T) Short.valueOf(resultSet.getShort(columnLabel));
}
if (type == BigDecimal.class) {
return (T) resultSet.getBigDecimal(columnLabel);
}
if (type == Byte.class) {
return (T) Byte.valueOf(resultSet.getByte(columnLabel));
}
// Dates
if (type == Date.class) {
return (T) resultSet.getDate(columnLabel);
}
if (type == Time.class) {
return (T) resultSet.getTime(columnLabel);
}
if (type == Timestamp.class) {
return (T) resultSet.getTimestamp(columnLabel);
}
// Streams
if (type == InputStream.class) {
return (T) resultSet.getBinaryStream(columnLabel);
}
if (type == Reader.class) {
return (T) resultSet.getCharacterStream(columnLabel);
}
// Other
if (type == Object.class) {
return (T) resultSet.getObject(columnLabel);
}
if (type == Boolean.class) {
return (T) Boolean.valueOf(resultSet.getBoolean(columnLabel));
}
if (type == Array.class) {
return (T) resultSet.getArray(columnLabel);
}
if (type == Blob.class) {
return (T) resultSet.getBlob(columnLabel);
}
if (type == Clob.class) {
return (T) resultSet.getClob(columnLabel);
}
if (type == Ref.class) {
return (T) resultSet.getRef(columnLabel);
}
if (type == RowId.class) {
return (T) resultSet.getRowId(columnLabel);
}
if (type == SQLXML.class) {
return (T) resultSet.getSQLXML(columnLabel);
}
if (type == URL.class) {
return (T) resultSet.getURL(columnLabel);
}
throw new SQLFeatureNotSupportedException(
String.format("resultSet=%s, columnLabel=%s, type=%s", resultSet, columnLabel, type));
}
}
/**
* Delegates to {@link DatabaseMetaData#getPseudoColumns(String, String, String, String)} without throwing a
* {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link DatabaseMetaData#getPseudoColumns(String, String, String, String)},
* then return null.
*
*
* @param databaseMetaData
* the receiver
* @param catalog
* See {@link DatabaseMetaData#getPseudoColumns(String, String, String, String)}
* @param schemaPattern
* See {@link DatabaseMetaData#getPseudoColumns(String, String, String, String)}
* @param tableNamePattern
* See {@link DatabaseMetaData#getPseudoColumns(String, String, String, String)}
* @param columnNamePattern
* See {@link DatabaseMetaData#getPseudoColumns(String, String, String, String)}
* @return See {@link DatabaseMetaData#getPseudoColumns(String, String, String, String)}
* @throws SQLException
* See {@link DatabaseMetaData#getPseudoColumns(String, String, String, String)}
* @see DatabaseMetaData#getPseudoColumns(String, String, String, String)
*/
public static ResultSet getPseudoColumns(final DatabaseMetaData databaseMetaData, final String catalog,
final String schemaPattern, final String tableNamePattern, final String columnNamePattern)
throws SQLException {
try {
return databaseMetaData.getPseudoColumns(catalog, schemaPattern, tableNamePattern, columnNamePattern);
} catch (final AbstractMethodError e) {
// do nothing
return null;
}
}
/**
* Delegates to {@link Connection#getSchema()} without throwing an {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link Connection#getSchema()}, then return null.
*
*
* @param connection
* the receiver
* @return null for a JDBC 4 driver or a value per {@link Connection#getSchema()}.
* @throws SQLException
* See {@link Connection#getSchema()}.
* @see Connection#getSchema()
*/
public static String getSchema(final Connection connection) throws SQLException {
try {
return connection.getSchema();
} catch (final AbstractMethodError e) {
// do nothing
return null;
}
}
/**
* Delegates to {@link Connection#setNetworkTimeout(Executor, int)} without throwing an {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link Connection#setNetworkTimeout(Executor, int)}, then do nothing.
*
*
* @param connection
* the receiver
* @param executor
* See {@link Connection#setNetworkTimeout(Executor, int)}
* @param milliseconds
* {@link Connection#setNetworkTimeout(Executor, int)}
* @throws SQLException
* {@link Connection#setNetworkTimeout(Executor, int)}
* @see Connection#setNetworkTimeout(Executor, int)
*/
public static void setNetworkTimeout(final Connection connection, final Executor executor, final int milliseconds)
throws SQLException {
try {
connection.setNetworkTimeout(executor, milliseconds);
} catch (final AbstractMethodError e) {
// do nothing
}
}
/**
* Delegates to {@link Connection#setSchema(String)} without throwing an {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link Connection#setSchema(String)}, then do nothing.
*
*
* @param connection
* the receiver
* @param schema
* See {@link Connection#setSchema(String)}.
* @throws SQLException
* See {@link Connection#setSchema(String)}.
* @see Connection#setSchema(String)
*/
public static void setSchema(final Connection connection, final String schema) throws SQLException {
try {
connection.setSchema(schema);
} catch (final AbstractMethodError e) {
// do nothing
}
}
/**
* Delegates to {@link Statement#closeOnCompletion()} without throwing an {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link Statement#closeOnCompletion()}, then just check that the connection
* is closed to then throw an SQLException.
*
*
* @param statement
* See {@link Statement#closeOnCompletion()}
* @throws SQLException
* See {@link Statement#closeOnCompletion()}
* @see Statement#closeOnCompletion()
*/
public static void closeOnCompletion(final Statement statement) throws SQLException {
try {
statement.closeOnCompletion();
} catch (final AbstractMethodError e) {
if (statement.isClosed()) {
throw new SQLException("Statement closed");
}
}
}
/**
* Delegates to {@link Statement#isCloseOnCompletion()} without throwing an {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link Statement#isCloseOnCompletion()}, then just check that the
* connection is closed to then throw an SQLException.
*
*
* @param statement
* See {@link Statement#isCloseOnCompletion()}
* @return See {@link Statement#isCloseOnCompletion()}
* @throws SQLException
* See {@link Statement#isCloseOnCompletion()}
* @see Statement#closeOnCompletion()
*/
public static boolean isCloseOnCompletion(final Statement statement) throws SQLException {
try {
return statement.isCloseOnCompletion();
} catch (final AbstractMethodError e) {
if (statement.isClosed()) {
throw new SQLException("Statement closed");
}
return false;
}
}
/**
* Delegates to {@link CommonDataSource#getParentLogger()} without throwing an {@link AbstractMethodError}.
*
* If the JDBC driver does not implement {@link CommonDataSource#getParentLogger()}, then return null.
*
*
* @param commonDataSource
* See {@link CommonDataSource#getParentLogger()}
* @return See {@link CommonDataSource#getParentLogger()}
* @throws SQLFeatureNotSupportedException
* See {@link CommonDataSource#getParentLogger()}
*/
public static Logger getParentLogger(final CommonDataSource commonDataSource) throws SQLFeatureNotSupportedException {
try {
return commonDataSource.getParentLogger();
} catch (final AbstractMethodError e) {
throw new SQLFeatureNotSupportedException("javax.sql.CommonDataSource#getParentLogger()");
}
}
}