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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.engine.jdbc.internal;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.jdbc.spi.JdbcCoordinator;
import org.hibernate.engine.jdbc.spi.JdbcServices;
import org.hibernate.engine.jdbc.spi.ResultSetReturn;
import org.hibernate.engine.jdbc.spi.SqlExceptionHelper;
import org.hibernate.engine.jdbc.spi.SqlStatementLogger;
/**
* Standard implementation of the ResultSetReturn contract
*
* @author Brett Meyer
*/
public class ResultSetReturnImpl implements ResultSetReturn {
private final JdbcCoordinator jdbcCoordinator;
private final Dialect dialect;
private final SqlStatementLogger sqlStatementLogger;
private final SqlExceptionHelper sqlExceptionHelper;
private boolean isJdbc4 = true;
/**
* Constructs a ResultSetReturnImpl
*
* @param jdbcCoordinator The JdbcCoordinator
*/
public ResultSetReturnImpl(JdbcCoordinator jdbcCoordinator) {
this.jdbcCoordinator = jdbcCoordinator;
final JdbcServices jdbcServices = jdbcCoordinator.getTransactionCoordinator().getTransactionContext()
.getTransactionEnvironment()
.getJdbcServices();
this.dialect = jdbcServices.getDialect();
this.sqlStatementLogger = jdbcServices.getSqlStatementLogger();
this.sqlExceptionHelper = jdbcServices.getSqlExceptionHelper();
}
@Override
public ResultSet extract(PreparedStatement statement) {
// IMPL NOTE : SQL logged by caller
if (isTypeOf(statement, CallableStatement.class)) {
// We actually need to extract from Callable statement. Although
// this seems needless, Oracle can return an
// OracleCallableStatementWrapper that finds its way to this method,
// rather than extract(CallableStatement). See HHH-8022.
final CallableStatement callableStatement = (CallableStatement) statement;
return extract( callableStatement );
}
try {
final ResultSet rs;
try {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().startStatementExecution();
rs = statement.executeQuery();
}
finally {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().endStatementExecution();
}
postExtract( rs, statement );
return rs;
}
catch (SQLException e) {
throw sqlExceptionHelper.convert( e, "could not extract ResultSet" );
}
}
private boolean isTypeOf(final Statement statement, final Class type) {
if (isJdbc4) {
try {
// This is "more correct" than #isInstance, but not always supported.
return statement.isWrapperFor( type );
}
catch (SQLException e) {
// No operation
}
catch (Throwable e) {
// No operation. Note that this catches more than just SQLException to
// cover edge cases where a driver might throw an UnsupportedOperationException, AbstractMethodError,
// etc. If so, skip permanently.
isJdbc4 = false;
}
}
return type.isInstance( statement );
}
@Override
public ResultSet extract(CallableStatement callableStatement) {
// IMPL NOTE : SQL logged by caller
try {
final ResultSet rs;
try {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().startStatementExecution();
rs = dialect.getResultSet( callableStatement );
}
finally {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().endStatementExecution();
}
postExtract( rs, callableStatement );
return rs;
}
catch (SQLException e) {
throw sqlExceptionHelper.convert( e, "could not extract ResultSet" );
}
}
@Override
public ResultSet extract(Statement statement, String sql) {
sqlStatementLogger.logStatement( sql );
try {
final ResultSet rs;
try {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().startStatementExecution();
rs = statement.executeQuery( sql );
}
finally {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().endStatementExecution();
}
postExtract( rs, statement );
return rs;
}
catch (SQLException e) {
throw sqlExceptionHelper.convert( e, "could not extract ResultSet" );
}
}
@Override
public ResultSet execute(PreparedStatement statement) {
// sql logged by StatementPreparerImpl
try {
final ResultSet rs;
try {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().startStatementExecution();
if ( !statement.execute() ) {
while ( !statement.getMoreResults() && statement.getUpdateCount() != -1 ) {
// do nothing until we hit the resultset
}
}
rs = statement.getResultSet();
}
finally {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().endStatementExecution();
}
postExtract( rs, statement );
return rs;
}
catch (SQLException e) {
throw sqlExceptionHelper.convert( e, "could not execute statement" );
}
}
@Override
public ResultSet execute(Statement statement, String sql) {
sqlStatementLogger.logStatement( sql );
try {
final ResultSet rs;
try {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().startStatementExecution();
if ( !statement.execute( sql ) ) {
while ( !statement.getMoreResults() && statement.getUpdateCount() != -1 ) {
// do nothing until we hit the resultset
}
}
rs = statement.getResultSet();
}
finally {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().endStatementExecution();
}
postExtract( rs, statement );
return rs;
}
catch (SQLException e) {
throw sqlExceptionHelper.convert( e, "could not execute statement" );
}
}
@Override
public int executeUpdate(PreparedStatement statement) {
try {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().startStatementExecution();
return statement.executeUpdate();
}
catch (SQLException e) {
throw sqlExceptionHelper.convert( e, "could not execute statement" );
}
finally {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().endStatementExecution();
}
}
@Override
public int executeUpdate(Statement statement, String sql) {
sqlStatementLogger.logStatement( sql );
try {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().startStatementExecution();
return statement.executeUpdate( sql );
}
catch (SQLException e) {
throw sqlExceptionHelper.convert( e, "could not execute statement" );
}
finally {
jdbcCoordinator.getTransactionCoordinator().getTransactionContext().endStatementExecution();
}
}
private void postExtract(ResultSet rs, Statement st) {
if ( rs != null ) {
jdbcCoordinator.register( rs, st );
}
}
}
