org.h2.pagestore.db.ScanCursor Maven / Gradle / Ivy
/*
* Copyright 2004-2019 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.pagestore.db;
import org.h2.index.Cursor;
import org.h2.message.DbException;
import org.h2.result.Row;
import org.h2.result.SearchRow;
/**
* The cursor implementation for the scan index.
*/
public class ScanCursor implements Cursor {
private final ScanIndex scan;
private Row row;
ScanCursor(ScanIndex scan) {
this.scan = scan;
row = null;
}
@Override
public Row get() {
return row;
}
@Override
public SearchRow getSearchRow() {
return row;
}
@Override
public boolean next() {
row = scan.getNextRow(row);
return row != null;
}
@Override
public boolean previous() {
throw DbException.throwInternalError(toString());
}
}