📄 spatialindexservlet.java
字号:
// **********************************************************************// <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/SpatialIndexServlet.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.io.IOException;import java.io.PrintWriter;import java.util.HashMap;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.bbn.openmap.io.FormatException;import com.bbn.openmap.layer.util.html.HtmlListElement;import com.bbn.openmap.layer.util.html.ListElement;import com.bbn.openmap.layer.util.html.TableHeaderElement;import com.bbn.openmap.layer.util.html.TableRowElement;import com.bbn.openmap.layer.util.html.WrapElement;import com.bbn.openmap.layer.vpf.DcwSpatialIndex;/** * This servlet generates HTML for VPF files in spatial index format. */public class SpatialIndexServlet extends VPFHttpServlet { /** * A do-nothing constructor - init does all the work. */ public SpatialIndexServlet() { super(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String filePath = (String) request.getAttribute(DispatchServlet.ROOTPATH_FILENAME); if (filePath == null) { String pathInfo = setPathInfo(request); filePath = contextInfo.resolvePath(pathInfo); if (!pathOkay(filePath, pathInfo, response)) { return; } } response.setContentType("text/html"); PrintWriter out = response.getWriter(); File fp = new File(filePath); String filename = fp.getName(); String tableMatch = getIndexedTable(filename); if (tableMatch == null) { tableMatch = "non-standard spatial index"; } else { tableMatch = fileURL(request, response, getRootDir(request), tableMatch); } out.println(HTML_DOCTYPE + "<HTML><HEAD><TITLE>VPF Spatial Index " + filename + "</TITLE></HEAD>\r\n<BODY>\r\n<H1>Spatial Index " + filename + " for Table " + tableMatch + "</H1>\r\n"); out.println(getStylesheetHTML(request)); try { DcwSpatialIndex ff = new DcwSpatialIndex(filePath, false); printSpatial(request, response, ff); ff.close(); } catch (FormatException fe) { out.println("FormatException while reading spatial index: " + fe.getMessage()); } out.println("</BODY></HTML>\r\n"); } public void printSpatial(HttpServletRequest request, HttpServletResponse response, DcwSpatialIndex si) throws FormatException, IOException { PrintWriter out = response.getWriter(); out.println("<H3>General Spatial Index Information</H3>"); HtmlListElement list = new HtmlListElement(); list.addElement("Number Of Primitives: " + si.getNumberOfPrimitives()); int nodesInTree = si.getNodesInTree(); list.addElement("Nodes in Tree: " + nodesInTree); list.addElement("Bounding Rectangle: (" + si.getBoundingX1() + ", " + si.getBoundingY1() + ") - (" + si.getBoundingX2() + ", " + si.getBoundingY2() + ")"); list.generate(out); out.println("<H3>Spatial Index Data</H3>"); TableRowElement columnNames = new TableRowElement(); columnNames.addElement(new TableHeaderElement("Primitive ID")); columnNames.addElement(new TableHeaderElement("x1")); columnNames.addElement(new TableHeaderElement("x2")); columnNames.addElement(new TableHeaderElement("y1")); columnNames.addElement(new TableHeaderElement("y2")); for (int i = 0; i < nodesInTree; i++) { int count = si.getPrimitiveCount(i); int offset = si.getPrimitiveOffset(i); DcwSpatialIndex.PrimitiveRecord pr[] = si.getPrimitiveRecords(i); out.println("<H4>Node " + i); if (count == 0) { out.println("(no primitives)</H4>\r\n"); } else { out.println("</H4>Primitive Count:" + count + " Relative Offset:" + offset + "\n"); ListElement rows = new ListElement(); WrapElement table = new WrapElement("table", "BORDER=1", rows); rows.addElement(columnNames); for (int j = 0; j < pr.length; j++) { DcwSpatialIndex.PrimitiveRecord pr1 = pr[j]; TableRowElement datarow = new TableRowElement(); rows.addElement(datarow); datarow.addElement(Integer.toString(pr1.primId)); datarow.addElement(Short.toString(pr1.x1)); datarow.addElement(Short.toString(pr1.x2)); datarow.addElement(Short.toString(pr1.y1)); datarow.addElement(Short.toString(pr1.y2)); } table.generate(out); } } } /** a map from spatial index name to primitive file indexed */ private HashMap indexTableMap; /** * Returns the name of the primitive file that the spatial index * is for. * * @param indexName the name of the index * @return the name of the primitive file */ public String getIndexedTable(String indexName) { if (indexTableMap == null) { HashMap newMap = new HashMap(); newMap.put("esi", "edg"); newMap.put("esi.", "edg."); newMap.put("fsi", "fac"); newMap.put("fsi.", "fac."); newMap.put("csi", "cnd"); newMap.put("csi.", "cnd."); newMap.put("nsi", "end"); newMap.put("nsi.", "end."); newMap.put("tsi", "txt"); newMap.put("tsi.", "txt."); indexTableMap = newMap; } return (String) indexTableMap.get(indexName); }}⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -