// **********************************************************************
// <copyright>
// BBN Technologies
// 10 Moulton Street
// Cambridge, MA 02138
// (617) 873-8000
//
// Copyright (C) BBNT Solutions LLC. All rights reserved.
// </copyright>
// **********************************************************************
// $Source: /cvs/distapps/openmap/src/vpfservlet/WEB-INF/src/com/bbn/openmap/vpfservlet/JoinRowMaker.java,v $
// $Revision: 1.2.2.2 $ $Date: 2005/08/11 21:03:10 $ $Author: dietrick $
// **********************************************************************
package com.bbn.openmap.vpfservlet;
import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.bbn.openmap.io.FormatException;
import com.bbn.openmap.layer.util.html.TableDataElement;
import com.bbn.openmap.layer.util.html.TableRowElement;
import com.bbn.openmap.layer.vpf.DcwRecordFile;
import com.bbn.openmap.layer.vpf.FeatureClassInfo;
import com.bbn.openmap.layer.vpf.TilingAdapter;
/**
* A RowMaker subclass that handles simple joins between tables.
*/
public class JoinRowMaker extends PlainRowMaker {
/** the column that contains the foreign key to the primitive table */
final int theColumn;
/** the column that contains the tile identifier */
final int tileColumn;
/** a list reused to load primitive rows */
final List jtrow = new ArrayList();
/** the utility class that understands tiled and untiled data */
final TileHolder tiler;
final TilingAdapter ta;
public JoinRowMaker(DcwRecordFile table, String joinColumnName,
String tableName, boolean isTiled) throws FormatException {
theColumn = table.whatColumn(joinColumnName);
tileColumn = isTiled ? table.whatColumn(FeatureClassInfo.TILE_ID_COLUMN_NAME)
: -1;
ta = table.getTilingAdapter(tileColumn, theColumn);
tiler = new TileHolder(new File(table.getTableFile()).getParentFile(), tableName, isTiled);
}
public void addToRow(TableRowElement row, List l) {
int i = 0;
for (Iterator li = l.iterator(); li.hasNext();) {
Object elt = li.next();
if (i == theColumn) {
int whatrow = ta.getTilePrimId(l);
int tileId = ta.getTileId(l);
try {
if (tiler.getRow(ta, l, jtrow)) {
for (Iterator it = jtrow.iterator(); it.hasNext();) {
row.addElement(new TableDataElement("CLASS=JoinColumn", it.next()
.toString()));
}
} else {
row.addElement("Join failed! [" + elt + "]" + "("
+ tileId + "," + whatrow + ")");
}
} catch (FormatException fe) {
row.addElement(fe.toString() + "(" + tileId + "," + whatrow
+ ")");
}
} else {
row.addElement(elt.toString());
}
i++;
}
}
public void close() {
tiler.close();
}
}