/
ScrollableResultsImpl.java
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/
ScrollableResultsImpl.java
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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.internal;
import org.hibernate.HibernateException;
import org.hibernate.NotYetImplementedFor6Exception;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.sql.results.internal.RowProcessingStateStandardImpl;
import org.hibernate.sql.results.jdbc.internal.JdbcValuesSourceProcessingStateStandardImpl;
import org.hibernate.sql.results.jdbc.spi.JdbcValues;
import org.hibernate.sql.results.jdbc.spi.JdbcValuesSourceProcessingOptions;
import org.hibernate.sql.results.spi.RowReader;
/**
* Standard ScrollableResults implementation.
*
* @author Gavin King
*/
public class ScrollableResultsImpl<R> extends AbstractScrollableResults<R> {
private R currentRow;
public ScrollableResultsImpl(
JdbcValues jdbcValues,
JdbcValuesSourceProcessingOptions processingOptions,
JdbcValuesSourceProcessingStateStandardImpl jdbcValuesSourceProcessingState,
RowProcessingStateStandardImpl rowProcessingState,
RowReader<R> rowReader,
SharedSessionContractImplementor persistenceContext) {
super(
jdbcValues,
processingOptions,
jdbcValuesSourceProcessingState,
rowProcessingState,
rowReader,
persistenceContext
);
}
@Override
protected R getCurrentRow() {
return currentRow;
}
@Override
public boolean next() {
final boolean result = getRowProcessingState().next();
prepareCurrentRow( result );
return result;
}
@Override
public boolean previous() {
final boolean result = getRowProcessingState().previous();
prepareCurrentRow( result );
return result;
}
@Override
public boolean scroll(int i) {
final boolean hasResult = getRowProcessingState().scroll( i );
prepareCurrentRow( hasResult );
return hasResult;
}
@Override
public boolean position(int position) {
final boolean hasResult = getRowProcessingState().position( position );
prepareCurrentRow( hasResult );
return hasResult;
}
@Override
public boolean first() {
final boolean hasResult = getRowProcessingState().first();
prepareCurrentRow( hasResult );
return hasResult;
}
@Override
public boolean last() {
final boolean hasResult = getRowProcessingState().last();
prepareCurrentRow( hasResult );
return hasResult;
// todo (6.0) : need these scrollable ResultSet "re-positioning"-style methods on the JdbcValues stuff
// try {
// final boolean result = getResultSet().last();
// prepareCurrentRow( result );
// return result;
// }
// catch (SQLException sqle) {
// throw convert( sqle, "could not advance using last()" );
// }
}
@Override
public void afterLast() {
throw new NotYetImplementedFor6Exception();
// todo (6.0) : need these scrollable ResultSet "re-positioning"-style methods on the JdbcValues stuff
// try {
// getResultSet().afterLast();
// }
// catch (SQLException sqle) {
// throw convert( sqle, "exception calling afterLast()" );
// }
}
@Override
public void beforeFirst() {
throw new NotYetImplementedFor6Exception();
// todo (6.0) : need these scrollable ResultSet "re-positioning"-style methods on the JdbcValues stuff
// try {
// getResultSet().beforeFirst();
// }
// catch (SQLException sqle) {
// throw convert( sqle, "exception calling beforeFirst()" );
// }
}
@Override
public boolean isFirst() {
throw new NotYetImplementedFor6Exception();
// todo (6.0) : need these scrollable ResultSet "re-positioning"-style methods on the JdbcValues stuff
// try {
// return getResultSet().isFirst();
// }
// catch (SQLException sqle) {
// throw convert( sqle, "exception calling isFirst()" );
// }
}
@Override
public boolean isLast() {
throw new NotYetImplementedFor6Exception();
// todo (6.0) : need these scrollable ResultSet "re-positioning"-style methods on the JdbcValues stuff
// try {
// return getResultSet().isLast();
// }
// catch (SQLException sqle) {
// throw convert( sqle, "exception calling isLast()" );
// }
}
@Override
public int getRowNumber() throws HibernateException {
return getRowProcessingState().getPosition();
}
@Override
public boolean setRowNumber(int rowNumber) throws HibernateException {
return position( rowNumber );
}
private void prepareCurrentRow(boolean underlyingScrollSuccessful) {
if ( !underlyingScrollSuccessful ) {
currentRow = null;
return;
}
currentRow = getRowReader().readRow(
getRowProcessingState(),
getProcessingOptions()
);
afterScrollOperation();
}
}