/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.platform.plugin.services.connections.hql;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.type.Type;
import org.pentaho.commons.connection.ILimitableConnection;
import org.pentaho.commons.connection.IPentahoConnection;
import org.pentaho.commons.connection.IPentahoResultSet;
import org.pentaho.platform.api.engine.ILogger;
import org.pentaho.platform.engine.core.system.IPentahoLoggingConnection;
import org.pentaho.platform.plugin.services.messages.Messages;
import java.io.File;
import java.util.List;
import java.util.Properties;
/**
* @author mdamour
*
* TODO To change the template for this generated type comment go to Window - Preferences - Java - Code Style -
* Code Templates
*/
public class HQLConnection implements IPentahoLoggingConnection, ILimitableConnection {
protected String lastQuery = null;
protected ILogger logger = null;
IPentahoResultSet resultSet = null;
File hibernateConfigFile = null;
private int timeOut = -1; // in seconds
private int maxRows = -1; // in seconds
Configuration hibernateConfig = null;
public HQLConnection() {
super();
}
public void setConfigFile( final File hbmCfg ) {
hibernateConfigFile = hbmCfg;
hibernateConfig = new Configuration();
hibernateConfig.configure( hibernateConfigFile );
}
public void setClassNames( final String[] classNames ) {
for ( int i = 0; ( classNames != null ) && ( i < classNames.length ); i++ ) {
try {
hibernateConfig.addClass( Class.forName( classNames[i] ) );
} catch ( ClassNotFoundException e ) {
logger.error( null, e );
}
}
}
public void setLogger( final ILogger logger ) {
this.logger = logger;
}
public void setProperties( Properties props ) {
}
public boolean initialized() {
// TODO create a good test
return true;
}
/**
* return datasource type HQL
*
* @return datasource type
*/
public String getDatasourceType() {
return IPentahoConnection.HQL_DATASOURCE;
}
public IPentahoResultSet prepareAndExecuteQuery( final String query, final List parameters ) throws Exception {
throw new UnsupportedOperationException();
}
public boolean preparedQueriesSupported() {
return false;
}
/*
* (non-Javadoc)
*
* @see org.pentaho.connection.IPentahoConnection#close()
*/
public void close() {
// TODO Auto-generated method stub
}
/*
* (non-Javadoc)
*
* @see org.pentaho.connection.IPentahoConnection#getLastQuery()
*/
public String getLastQuery() {
return lastQuery;
}
/*
* (non-Javadoc)
*
* @see org.pentaho.connection.IPentahoConnection#executeQuery(java.lang.String)
*/
public IPentahoResultSet executeQuery( final String query ) {
lastQuery = query;
Session sess = null;
IPentahoResultSet localResultSet = null;
try {
SessionFactory sf = hibernateConfig.buildSessionFactory();
// open session
sess = sf.openSession();
Query q = sess.createQuery( query );
if ( timeOut >= 0 ) {
q.setTimeout( timeOut );
}
if ( maxRows >= 0 ) {
q.setMaxResults( maxRows );
}
List list = q.list();
localResultSet = generateResultSet( list, q.getReturnAliases(), q.getReturnTypes() );
} finally {
try {
if ( sess != null ) {
sess.close();
}
} catch ( Exception e ) {
// Doesn't seem like we would get any exception from sess.close()
logger.error( Messages.getInstance().getErrorString( "HQLConnection.ERROR_0001_UNABLE_TO_CLOSE" ), e ); //$NON-NLS-1$
}
}
return localResultSet;
}
public IPentahoResultSet generateResultSet( final List list, final String[] columnHeaders,
final Type[] columnTypes ) {
HQLResultSet localResultSet = new HQLResultSet( list, columnHeaders, columnTypes );
return localResultSet;
}
/*
* (non-Javadoc)
*
* @see org.pentaho.connection.IPentahoConnection#isClosed()
*/
public boolean isClosed() {
return false;
}
/*
* (non-Javadoc)
*
* @see org.pentaho.connection.IPentahoConnection#isReadOnly()
*/
public boolean isReadOnly() {
return true;
}
/*
* (non-Javadoc)
*
* @see org.pentaho.connection.IPentahoConnection#clearWarnings()
*/
public void clearWarnings() {
// TODO Auto-generated method stub
}
public IPentahoResultSet getResultSet() {
return resultSet;
}
public boolean connect( final Properties props ) {
return true;
}
/*
* (non-Javadoc)
*
* @see org.pentaho.connection.IPentahoConnection#setMaxRows(int)
*/
public void setMaxRows( final int value ) {
this.maxRows = value;
}
/*
* (non-Javadoc)
*
* @see org.pentaho.connection.IPentahoConnection#setFetchSize(int)
*/
public void setFetchSize( final int fetchSize ) {
// TODO Auto-generated method stub
// throw new UnsupportedOperationException();
}
public void setQueryTimeout( final int value ) {
this.timeOut = value;
}
}