/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.engine.jdbc.internal.proxy;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import org.hibernate.engine.jdbc.spi.InvalidatableWrapper;
import org.hibernate.engine.jdbc.spi.JdbcWrapper;
import org.hibernate.engine.jdbc.spi.LogicalConnectionImplementor;
import org.hibernate.internal.util.ValueHolder;
/**
* Centralized builder for proxy instances
*
* @author Steve Ebersole
*/
public class ProxyBuilder {
// Connection ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public static final Class[] CONNECTION_PROXY_INTERFACES = new Class[] {
Connection.class,
JdbcWrapper.class
};
private static final ValueHolder<Constructor<Connection>> connectionProxyConstructorValue = new ValueHolder<Constructor<Connection>>(
new ValueHolder.DeferredInitializer<Constructor<Connection>>() {
@Override
public Constructor<Connection> initialize() {
try {
return locateConnectionProxyClass().getConstructor( InvocationHandler.class );
}
catch (NoSuchMethodException e) {
throw new JdbcProxyException( "Could not find proxy constructor in JDK generated Connection proxy class", e );
}
}
@SuppressWarnings("unchecked")
private Class<Connection> locateConnectionProxyClass() {
return (Class<Connection>) Proxy.getProxyClass(
JdbcWrapper.class.getClassLoader(),
CONNECTION_PROXY_INTERFACES
);
}
}
);
public static Connection buildConnection(LogicalConnectionImplementor logicalConnection) {
final ConnectionProxyHandler proxyHandler = new ConnectionProxyHandler( logicalConnection );
try {
return connectionProxyConstructorValue.getValue().newInstance( proxyHandler );
}
catch (Exception e) {
throw new JdbcProxyException( "Could not instantiate JDBC Connection proxy", e );
}
}
// Statement ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public static final Class[] STMNT_PROXY_INTERFACES = new Class[] {
Statement.class,
JdbcWrapper.class,
InvalidatableWrapper.class
};
private static final ValueHolder<Constructor<Statement>> statementProxyConstructorValue = new ValueHolder<Constructor<Statement>>(
new ValueHolder.DeferredInitializer<Constructor<Statement>>() {
@Override
public Constructor<Statement> initialize() {
try {
return locateStatementProxyClass().getConstructor( InvocationHandler.class );
}
catch (NoSuchMethodException e) {
throw new JdbcProxyException( "Could not find proxy constructor in JDK generated Statement proxy class", e );
}
}
@SuppressWarnings("unchecked")
private Class<Statement> locateStatementProxyClass() {
return (Class<Statement>) Proxy.getProxyClass(
JdbcWrapper.class.getClassLoader(),
STMNT_PROXY_INTERFACES
);
}
}
);
public static Statement buildStatement(
Statement statement,
ConnectionProxyHandler connectionProxyHandler,
Connection connectionProxy) {
final BasicStatementProxyHandler proxyHandler = new BasicStatementProxyHandler(
statement,
connectionProxyHandler,
connectionProxy
);
try {
return statementProxyConstructorValue.getValue().newInstance( proxyHandler );
}
catch (Exception e) {
throw new JdbcProxyException( "Could not instantiate JDBC Statement proxy", e );
}
}
public static Statement buildImplicitStatement(
Statement statement,
ConnectionProxyHandler connectionProxyHandler,
Connection connectionProxy) {
if ( statement == null ) {
return null;
}
final ImplicitStatementProxyHandler proxyHandler = new ImplicitStatementProxyHandler( statement, connectionProxyHandler, connectionProxy );
try {
return statementProxyConstructorValue.getValue().newInstance( proxyHandler );
}
catch (Exception e) {
throw new JdbcProxyException( "Could not instantiate JDBC Statement proxy", e );
}
}
// PreparedStatement ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public static final Class[] PREPARED_STMNT_PROXY_INTERFACES = new Class[] {
PreparedStatement.class,
JdbcWrapper.class,
InvalidatableWrapper.class
};
private static final ValueHolder<Constructor<PreparedStatement>> preparedStatementProxyConstructorValue = new ValueHolder<Constructor<PreparedStatement>>(
new ValueHolder.DeferredInitializer<Constructor<PreparedStatement>>() {
@Override
public Constructor<PreparedStatement> initialize() {
try {
return locatePreparedStatementProxyClass().getConstructor( InvocationHandler.class );
}
catch (NoSuchMethodException e) {
throw new JdbcProxyException( "Could not find proxy constructor in JDK generated Statement proxy class", e );
}
}
@SuppressWarnings("unchecked")
private Class<PreparedStatement> locatePreparedStatementProxyClass() {
return (Class<PreparedStatement>) Proxy.getProxyClass(
JdbcWrapper.class.getClassLoader(),
PREPARED_STMNT_PROXY_INTERFACES
);
}
}
);
public static PreparedStatement buildPreparedStatement(
String sql,
Statement statement,
ConnectionProxyHandler connectionProxyHandler,
Connection connectionProxy) {
final PreparedStatementProxyHandler proxyHandler = new PreparedStatementProxyHandler(
sql,
statement,
connectionProxyHandler,
connectionProxy
);
try {
return preparedStatementProxyConstructorValue.getValue().newInstance( proxyHandler );
}
catch (Exception e) {
throw new JdbcProxyException( "Could not instantiate JDBC PreparedStatement proxy", e );
}
}
// CallableStatement ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public static final Class[] CALLABLE_STMNT_PROXY_INTERFACES = new Class[] {
CallableStatement.class,
JdbcWrapper.class,
InvalidatableWrapper.class
};
private static final ValueHolder<Constructor<CallableStatement>> callableStatementProxyConstructorValue = new ValueHolder<Constructor<CallableStatement>>(
new ValueHolder.DeferredInitializer<Constructor<CallableStatement>>() {
@Override
public Constructor<CallableStatement> initialize() {
try {
return locateCallableStatementProxyClass().getConstructor( InvocationHandler.class );
}
catch (NoSuchMethodException e) {
throw new JdbcProxyException( "Could not find proxy constructor in JDK generated Statement proxy class", e );
}
}
@SuppressWarnings("unchecked")
private Class<CallableStatement> locateCallableStatementProxyClass() {
return (Class<CallableStatement>) Proxy.getProxyClass(
JdbcWrapper.class.getClassLoader(),
CALLABLE_STMNT_PROXY_INTERFACES
);
}
}
);
public static CallableStatement buildCallableStatement(
String sql,
CallableStatement statement,
ConnectionProxyHandler connectionProxyHandler,
Connection connectionProxy) {
final CallableStatementProxyHandler proxyHandler = new CallableStatementProxyHandler(
sql,
statement,
connectionProxyHandler,
connectionProxy
);
try {
return callableStatementProxyConstructorValue.getValue().newInstance( proxyHandler );
}
catch (Exception e) {
throw new JdbcProxyException( "Could not instantiate JDBC CallableStatement proxy", e );
}
}
// ResultSet ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public static final Class[] RESULTSET_PROXY_INTERFACES = new Class[] {
ResultSet.class,
JdbcWrapper.class,
InvalidatableWrapper.class
};
private static final ValueHolder<Constructor<ResultSet>> resultSetProxyConstructorValue = new ValueHolder<Constructor<ResultSet>>(
new ValueHolder.DeferredInitializer<Constructor<ResultSet>>() {
@Override
public Constructor<ResultSet> initialize() {
try {
return locateCallableStatementProxyClass().getConstructor( InvocationHandler.class );
}
catch (NoSuchMethodException e) {
throw new JdbcProxyException( "Could not find proxy constructor in JDK generated ResultSet proxy class", e );
}
}
@SuppressWarnings("unchecked")
private Class<ResultSet> locateCallableStatementProxyClass() {
return (Class<ResultSet>) Proxy.getProxyClass(
JdbcWrapper.class.getClassLoader(),
RESULTSET_PROXY_INTERFACES
);
}
}
);
public static ResultSet buildResultSet(
ResultSet resultSet,
AbstractStatementProxyHandler statementProxyHandler,
Statement statementProxy) {
final ResultSetProxyHandler proxyHandler = new ResultSetProxyHandler( resultSet, statementProxyHandler, statementProxy );
try {
return resultSetProxyConstructorValue.getValue().newInstance( proxyHandler );
}
catch (Exception e) {
throw new JdbcProxyException( "Could not instantiate JDBC ResultSet proxy", e );
}
}
public static ResultSet buildImplicitResultSet(
ResultSet resultSet,
ConnectionProxyHandler connectionProxyHandler,
Connection connectionProxy) {
final ImplicitResultSetProxyHandler proxyHandler = new ImplicitResultSetProxyHandler(
resultSet,
connectionProxyHandler,
connectionProxy
);
try {
return resultSetProxyConstructorValue.getValue().newInstance( proxyHandler );
}
catch (Exception e) {
throw new JdbcProxyException( "Could not instantiate JDBC ResultSet proxy", e );
}
}
public static ResultSet buildImplicitResultSet(
ResultSet resultSet,
ConnectionProxyHandler connectionProxyHandler,
Connection connectionProxy,
Statement sourceStatement) {
final ImplicitResultSetProxyHandler proxyHandler = new ImplicitResultSetProxyHandler(
resultSet,
connectionProxyHandler,
connectionProxy,
sourceStatement
);
try {
return resultSetProxyConstructorValue.getValue().newInstance( proxyHandler );
}
catch (Exception e) {
throw new JdbcProxyException( "Could not instantiate JDBC ResultSet proxy", e );
}
}
// DatabaseMetaData ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public static final Class[] METADATA_PROXY_INTERFACES = new Class[] {
DatabaseMetaData.class,
JdbcWrapper.class
};
private static final ValueHolder<Constructor<DatabaseMetaData>> metadataProxyConstructorValue = new ValueHolder<Constructor<DatabaseMetaData>>(
new ValueHolder.DeferredInitializer<Constructor<DatabaseMetaData>>() {
@Override
public Constructor<DatabaseMetaData> initialize() {
try {
return locateDatabaseMetaDataProxyClass().getConstructor( InvocationHandler.class );
}
catch (NoSuchMethodException e) {
throw new JdbcProxyException( "Could not find proxy constructor in JDK generated DatabaseMetaData proxy class", e );
}
}
@SuppressWarnings("unchecked")
private Class<DatabaseMetaData> locateDatabaseMetaDataProxyClass() {
return (Class<DatabaseMetaData>) Proxy.getProxyClass(
JdbcWrapper.class.getClassLoader(),
METADATA_PROXY_INTERFACES
);
}
}
);
public static DatabaseMetaData buildDatabaseMetaData(
DatabaseMetaData metaData,
ConnectionProxyHandler connectionProxyHandler,
Connection connectionProxy) {
final DatabaseMetaDataProxyHandler proxyHandler = new DatabaseMetaDataProxyHandler(
metaData,
connectionProxyHandler,
connectionProxy
);
try {
return metadataProxyConstructorValue.getValue().newInstance( proxyHandler );
}
catch (Exception e) {
throw new JdbcProxyException( "Could not instantiate JDBC DatabaseMetaData proxy", e );
}
}
}