// **********************************************************************
// <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/FITRowMaker.java,v $
// $Revision: 1.2.2.2 $ $Date: 2005/08/11 21:03:09 $ $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 FITRowMaker 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;
/** the array of feature names for the coverage */
final String[] featureNames;
/** the utility class that understands tiled and untiled data */
final TileHolder tiler;
/** the column in the FIT that specifies the primitive id */
final int primIdColumn;
/** the column in the FIT that specifies the tile id (may be -1) */
final int tileIdColumn;
/** the column in the FIT that specifies the feature class id */
final int fcIdColumn;
/** the column in the FIT that specifies the feature id */
final int featureIdColumn;
/** the path for the coverage */
final File dirPath;
/** the extension (e.g. .lft) used for feature table names */
final String featureTableExt;
/**
* Construct a rowmaker for a feature index table.
*
* @param drf the feature index table
* @throws FormatException some error was encountered
*/
public FITRowMaker(DcwRecordFile drf) throws FormatException {
String tableName = drf.getTableName().substring(0, 3);
dirPath = new File(drf.getTableFile()).getParentFile();
featureTableExt = getExtensionForTable(tableName);
primIdColumn = drf.whatColumn("prim_id");
tileIdColumn = drf.whatColumn("tile_id");
fcIdColumn = drf.whatColumn("fc_id");
featureIdColumn = drf.whatColumn("feature_id");
tiler = new TileHolder(dirPath, tableName, (tileIdColumn != -1));
featureNames = getFeatureNames(dirPath);
featureTables = new DcwRecordFile[featureNames.length];
}
/**
* Returns the feature table that corresponds to the feature class
* ID.
*
* @param fcId the feature class ID
* @return the feature table
* @throws FormatException the feature table couldn't be created
*/
public DcwRecordFile getFeatureTable(int fcId) throws FormatException {
fcId -= 1; // array is 0-based, table ids are 1-based
DcwRecordFile retval = featureTables[fcId];
if (retval == null) {
retval = new DcwRecordFile(dirPath + File.separator
+ featureNames[fcId].toLowerCase() + featureTableExt);
featureTables[fcId] = retval;
}
return retval;
}
public void addToRow(TableRowElement row, List l) {
int primId = VPFUtil.objectToInt(l.get(primIdColumn));
int tileId = (tileIdColumn == -1) ? -1
: VPFUtil.objectToInt(l.get(tileIdColumn));
int fcId = VPFUtil.objectToInt(l.get(fcIdColumn));
int featureId = VPFUtil.objectToInt(l.get(featureIdColumn));
int id = VPFUtil.objectToInt(l.get(0));
row.addElement("" + id + " (" + tileId + "," + primId + ") (" + fcId
+ ", " + featureId + ")");
try {
tiler.getRow(tileId, primId, primRow);
DcwRecordFile featureTable = getFeatureTable(fcId);
featureTable.getRow(featureRow, featureId);
for (Iterator i = primRow.iterator(); i.hasNext();) {
row.addElement(new TableDataElement("CLASS=JoinColumn", i.next()
.toString()));
}
for (Iterator i = featureRow.iterator(); i.hasNext();) {
row.addElement(new TableDataElement("CLASS=Join2Column", i.next()
.toString()));
}
} catch (FormatException fe) {
row.addElement(fe.toString());
}
}
public String[] getFeatureNames(File dirPath) throws FormatException {
File fcafile = new File(dirPath, "fca");
if (!fcafile.canRead()) {
fcafile = new File(dirPath, "fca.");
}
DcwRecordFile fca = new DcwRecordFile(fcafile.toString());
List l = new ArrayList(fca.getColumnCount());
int fclassColumn = fca.whatColumn("fclass");
List fclassnames = new ArrayList();
while (fca.parseRow(l)) {
fclassnames.add(l.get(fclassColumn));
}
fca.close();
String retval[] = new String[fclassnames.size()];
fclassnames.toArray(retval);
return retval;
}
public static String getExtensionForTable(String tablename) {
if (tablename.equals("fac")) {
return ".aft";
} else if (tablename.equals("cnd")) {
return ".pft";
} else if (tablename.equals("end")) {
return ".pft";
} else if (tablename.equals("txt")) {
return ".tft";
} else if (tablename.equals("edg")) {
return ".lft";
}
return null;
}
public void close() {
tiler.close();
for (int i = 0; i < featureTables.length; i++) {
DcwRecordFile drf = featureTables[i];
if (drf != null) {
drf.close();
}
}
}
}