// **********************************************************************
// <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/Schema.java,v $
// $Revision: 1.2.2.2 $ $Date: 2005/08/11 21:03:08 $ $Author: dietrick $
// **********************************************************************
package com.bbn.openmap.vpfservlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.bbn.openmap.layer.util.html.HtmlListElement;
import com.bbn.openmap.layer.util.html.ListElement;
import com.bbn.openmap.layer.util.html.StringElement;
import com.bbn.openmap.layer.util.html.TableRowElement;
import com.bbn.openmap.layer.util.html.WrapElement;
import com.bbn.openmap.layer.vpf.DcwColumnInfo;
import com.bbn.openmap.layer.vpf.DcwRecordFile;
/**
* A servlet class that will print the schema for a VPF table.
*/
public class Schema extends VPFHttpServlet {
/**
* A do-nothing constructor - init does all the work.
*/
public Schema() {
super();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
DcwRecordFile foo = (DcwRecordFile) request.getAttribute(DispatchServlet.RECORD_FILE_OBJ);
if (foo == null) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
return;
}
String basepath = getRootDir(request);
String url = response.encodeURL(request.getContextPath()
+ "/VPFHelp.jsp?topic=table_schema");
PrintWriter out = response.getWriter();
out.println("<H2>Table Schema</H2>");
out.println("<H3>General Table Information</H3>");
HtmlListElement list = new HtmlListElement();
list.addElement("Table Name: " + foo.getTableName());
list.addElement("Table Description: " + foo.getDescription());
list.addElement("DocFile Name: "
+ fileURL(request,
response,
basepath,
foo.getDocumentationFilename()));
int reclen = foo.getRecordLength();
String reclenstr = (reclen == -1) ? ("variable")
: (Integer.toString(reclen) + " bytes");
list.addElement("Record Length: " + reclenstr);
try {
list.addElement("Record Count: " + foo.getRecordCount());
} catch (com.bbn.openmap.io.FormatException fe) {
list.addElement("Record Count Error: " + fe.toString());
}
list.generate(out);
// out.println("<br><H3>Column Schema</H3>");
ListElement rows = new ListElement();
WrapElement table = new WrapElement("table", "BORDER=1", rows);
TableRowElement thr = new TableRowElement();
rows.addElement(new WrapElement("CAPTION", new StringElement("Column Schema")));
rows.addElement(thr);
thr.addElement(THE("#", url));
thr.addElement(THE("Name", url));
thr.addElement(THE("Type", url));
thr.addElement(THE("Count", url));
thr.addElement(THE("Key Type", url));
thr.addElement(THE("Description", url));
thr.addElement(THE("VDT", url));
thr.addElement(THE("Thematic Index", url));
thr.addElement(THE("DocFile", url));
DcwColumnInfo dci[] = foo.getColumnInfo();
for (int i = 0; i < dci.length; i++) {
TableRowElement tr = new TableRowElement();
rows.addElement(tr);
tr.addElement(Integer.toString(i));
tr.addElement(dci[i].getColumnName());
tr.addElement(String.valueOf(dci[i].getFieldType()));
int elts = dci[i].getNumberOfElements();
tr.addElement(elts == -1 ? "*" : Integer.toString(elts));
tr.addElement(String.valueOf(dci[i].getKeyType()));
tr.addElement(dci[i].getColumnDescription());
tr.addElement(fileURL(request, response, basepath, dci[i].getVDT()));
tr.addElement(thematicURL(request,
response,
basepath,
dci[i].getThematicIndexName()));
tr.addElement(docURL(request,
response,
basepath,
dci[i].getNarrativeTable()));
}
table.generate(response.getWriter());
}
public static String thematicURL(HttpServletRequest request,
HttpServletResponse response,
String pathname, String filename) {
return toURL(request, response, "/Thematic", pathname, filename);
}
public static String docURL(HttpServletRequest request,
HttpServletResponse response, String pathname,
String filename) {
return toURL(request, response, "/DocFile", pathname, filename);
}
}