?? linkedcursor.java
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/*
* Copyright 2004-2008 H2 Group. Licensed under the H2 License, Version 1.0
* (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.index;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.h2.engine.Session;
import org.h2.message.Message;
import org.h2.result.Row;
import org.h2.result.SearchRow;
import org.h2.table.Column;
import org.h2.table.Table;
import org.h2.value.DataType;
import org.h2.value.Value;
/**
* The cursor implementation for the linked index.
*/
public class LinkedCursor implements Cursor {
private Session session;
private Row current;
private ResultSet rs;
private Table table;
LinkedCursor(Table table, ResultSet rs, Session session) {
this.session = session;
this.table = table;
this.rs = rs;
}
public Row get() {
return current;
}
public SearchRow getSearchRow() throws SQLException {
return current;
}
public int getPos() {
throw Message.getInternalError();
}
public boolean next() throws SQLException {
boolean result = rs.next();
if (!result) {
rs.close();
current = null;
return false;
}
current = table.getTemplateRow();
for (int i = 0; i < current.getColumnCount(); i++) {
Column col = table.getColumn(i);
Value v = DataType.readValue(session, rs, i + 1, col.getType());
current.setValue(i, v);
}
return true;
}
}
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