// **********************************************************************
// <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/ComplexFeatureJoinRowMaker.java,v $
// $Revision: 1.2.2.2 $ $Date: 2005/08/11 21:03:07 $ $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.VPFUtil;
/**
* A RowMaker that performs the join in a feature index table.
*/
public class ComplexFeatureJoinRowMaker extends PlainRowMaker {
/** a list reused to load primitive rows */
final List primRow = new ArrayList();
/** a list reused to load feature rows */
final List featureRow = new ArrayList();
/** the array of feature tables, each index is lazy-initialized */
final DcwRecordFile[] featureTables;
/**
* Construct a rowmaker for a complex feature join.
* @param drf the table
* @throws FormatException some error was encountered
*/
public ComplexFeatureJoinRowMaker(DcwRecordFile drf) throws FormatException {
featureTables = getTables(drf);
}
public void addToRow(TableRowElement row, List l) {
try {
boolean color1 = false;
int i = 0;
for (Iterator li = l.iterator(); li.hasNext(); ) {
Object o = li.next();
DcwRecordFile featureTable = featureTables[i++];
if ((featureTable != null) &&
featureTable.getRow(featureRow, VPFUtil.objectToInt(o))) {
color1 = !color1;
for (Iterator fi = featureRow.iterator(); fi.hasNext(); ) {
row.addElement(new TableDataElement(color1 ? "CLASS=JoinColumn" : "CLASS=Join2Column",
fi.next().toString()));
}
} else {
row.addElement(o.toString());
}
}
} catch (FormatException fe) {
row.addElement(fe.toString());
}
}
public DcwRecordFile[] getTables(DcwRecordFile drf) throws FormatException {
DcwRecordFile[] retval = new DcwRecordFile[drf.getColumnCount()];
File dirPath = new File(drf.getTableFile()).getParentFile();
File fcsfile = new File(dirPath, "fcs");
if (!fcsfile.canRead()) {
fcsfile = new File(dirPath, "fcs.");
}
DcwRecordFile fcs = new DcwRecordFile(fcsfile.toString());
List l = new ArrayList(fcs.getColumnCount());
String tableName = drf.getTableName();
int table1Column = fcs.whatColumn("table1");
int table1_keyColumn = fcs.whatColumn("table1_key");
int table2Column = fcs.whatColumn("table2");
int table2_keyColumn = fcs.whatColumn("table2_key");
while (fcs.parseRow(l)) {
String table1 = (String)l.get(table1Column);
String table1_key = (String)l.get(table1_keyColumn);
String table2 = (String)l.get(table2Column);
String table2_key = (String)l.get(table2_keyColumn);
if (table1.equalsIgnoreCase(tableName) &&
table2_key.equalsIgnoreCase("id")) {
int indexCol = drf.whatColumn(table1_key);
retval[indexCol] = new DcwRecordFile(dirPath + File.separator + table2);
}
}
fcs.close();
return retval;
}
public void close() {
for (int i = 0; i < featureTables.length; i++) {
DcwRecordFile drf = featureTables[i];
if (drf != null) {
drf.close();
}
}
}
}