package org.basex.query.up.primitives;
import static org.basex.query.util.Err.*;
import java.util.HashMap;
import java.util.Map.Entry;
import org.basex.data.Data;
import org.basex.io.IOFile;
import org.basex.query.QueryException;
import org.basex.query.func.Function;
import org.basex.util.InputInfo;
/**
* Update primitive for the {@link Function#_DB_RENAME} function.
*
* @author BaseX Team 2005-12, BSD License
* @author Christian Gruen
*/
public final class DBRename extends UpdatePrimitive {
/** Source and target paths. */
private final HashMap<String, String> map = new HashMap<String, String>();
/**
* Constructor.
* @param d data
* @param src source path
* @param trg target path
* @param info input info
*/
public DBRename(final Data d, final String src, final String trg,
final InputInfo info) {
super(PrimitiveType.DBRENAME, -1, d, info);
map.put(src, trg);
}
@Override
public void merge(final UpdatePrimitive p) throws QueryException {
for(final Entry<String, String> e : ((DBRename) p).map.entrySet()) {
final String src = e.getKey();
if(map.containsKey(src)) UPPATHREN.thrw(input, src);
map.put(src, e.getValue());
}
}
@Override
public void apply() {
for(final Entry<String, String> op : map.entrySet()) {
final IOFile src = new IOFile(op.getKey());
final IOFile trg = new IOFile(op.getValue());
if(src.exists()) src.rename(trg);
}
}
@Override
public int size() {
return map.size();
}
}