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comparison software/mpdl-services-new/mpiwg-mpdl-cms-web/src/de/mpg/mpiwg/berlin/mpdl/servlets/cms/MoreLikeThis.java @ 25:e9fe3186670c default tip

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letzter Stand eingecheckt
author Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
date Tue, 21 May 2013 10:19:32 +0200
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23:e845310098ba 25:e9fe3186670c
1 package de.mpg.mpiwg.berlin.mpdl.servlets.cms;
2
3 import java.io.IOException;
4 import java.io.PrintWriter;
5 import java.util.ArrayList;
6 import java.util.Date;
7
8 import javax.servlet.ServletException;
9 import javax.servlet.http.HttpServlet;
10 import javax.servlet.http.HttpServletRequest;
11 import javax.servlet.http.HttpServletResponse;
12
13 import org.apache.lucene.document.Fieldable;
14
15 import de.mpg.mpiwg.berlin.mpdl.cms.document.Document;
16 import de.mpg.mpiwg.berlin.mpdl.cms.document.Hits;
17 import de.mpg.mpiwg.berlin.mpdl.cms.lucene.IndexHandler;
18
19 public class MoreLikeThis extends HttpServlet {
20 private static final long serialVersionUID = 1L;
21
22 public MoreLikeThis() {
23 super();
24 }
25
26 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
27 request.setCharacterEncoding("utf-8");
28 response.setCharacterEncoding("utf-8");
29 String outputFormat = request.getParameter("outputFormat");
30 if (outputFormat == null)
31 outputFormat = "html";
32 String docId = request.getParameter("docId");
33 String pageStr = request.getParameter("page");
34 if (pageStr == null)
35 pageStr = "1";
36 int page = Integer.parseInt(pageStr);
37 String pageSizeStr = request.getParameter("pageSize");
38 if (pageSizeStr == null)
39 pageSizeStr = "10";
40 int pageSize = Integer.parseInt(pageSizeStr);
41 int from = (page * pageSize) - pageSize; // e.g. 0
42 int to = page * pageSize - 1; // e.g. 9
43 PrintWriter out = response.getWriter();
44 IndexHandler indexHandler;
45 try {
46 Date begin = new Date();
47 indexHandler = IndexHandler.getInstance();
48 Hits hits = indexHandler.moreLikeThis(docId, from, to);
49 ArrayList<Document> docs = null;
50 if (hits != null)
51 docs = hits.getHits();
52 int hitsSize = -1;
53 int docsSize = -1;
54 if (hits != null)
55 hitsSize = hits.getSize();
56 if (docs != null)
57 docsSize = docs.size();
58 Date end = new Date();
59 long elapsedTime = end.getTime() - begin.getTime();
60 if (outputFormat.equals("xml"))
61 response.setContentType("text/xml");
62 else if (outputFormat.equals("html"))
63 response.setContentType("text/html");
64 else
65 response.setContentType("text/xml");
66 if (outputFormat.equals("xml")) {
67 out.print("<result>");
68 out.print("<query>");
69 out.print("<docId>" + docId + "</docId>");
70 out.print("<resultPage>" + page + "</resultPage>");
71 out.print("<resultPageSize>" + pageSize + "</resultPageSize>");
72 out.print("</query>");
73 out.print("<hitsSize>" + hitsSize + "</hitsSize>");
74 out.print("<hits>");
75 for (int i=0; i<docsSize; i++) {
76 Document doc = docs.get(i);
77 out.print("<doc>");
78 String similarDocId = doc.getFieldable("docId").stringValue();
79 out.print("<docId>" + similarDocId + "</docId>");
80 Fieldable docCollectionNamesField = doc.getFieldable("collectionNames");
81 if (docCollectionNamesField != null) {
82 String docCollectionNames = docCollectionNamesField.stringValue();
83 out.print("<collectionName>" + docCollectionNames + "</collectionName>");
84 }
85 ArrayList<String> hitFragments = doc.getHitFragments();
86 if (hitFragments != null) {
87 out.print("<hitFragments>");
88 for (int j=0; j<hitFragments.size(); j++) {
89 String hitFragment = hitFragments.get(j);
90 out.print("<hitFragment>" + hitFragment + "</hitFragment>");
91 }
92 out.print("</hitFragments>");
93 }
94 out.print("</doc>");
95 }
96 out.print("</hits>");
97 out.print("<executionTime>" + elapsedTime + "</executionTime>");
98 out.print("</result>");
99 } else if (outputFormat.equals("html")) {
100 StringBuilder htmlStrBuilder = new StringBuilder();
101 htmlStrBuilder.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">");
102 htmlStrBuilder.append("<html>");
103 htmlStrBuilder.append("<head>");
104 htmlStrBuilder.append("<title>Similar documents of: " + docId + "</title>");
105 htmlStrBuilder.append("</head>");
106 htmlStrBuilder.append("<body>");
107 htmlStrBuilder.append("<h4>Similar documents of: " + docId + "</h4>");
108 int fromDisplay = from + 1;
109 int toDisplay = to + 1;
110 if (hitsSize < to)
111 toDisplay = hitsSize;
112 htmlStrBuilder.append("Result: " + fromDisplay + " - " + toDisplay + " of " + hitsSize + " documents" + "</td>");
113 htmlStrBuilder.append("<ul>");
114 for (int i=0; i<docsSize; i++) {
115 Document doc = docs.get(i);
116 String similarDocId = doc.getFieldable("docId").stringValue();
117 int num = (page - 1) * pageSize + i + 1;
118 htmlStrBuilder.append("<li>" + num + ". " + similarDocId + "</li>");
119 }
120 htmlStrBuilder.append("</ul>");
121 htmlStrBuilder.append("<p/>");
122 htmlStrBuilder.append("Elapsed time: " + elapsedTime + " ms");
123 htmlStrBuilder.append("</body>");
124 htmlStrBuilder.append("</html>");
125 out.print(htmlStrBuilder.toString());
126 }
127 out.close();
128 } catch (Exception e) {
129 throw new ServletException(e);
130 }
131 }
132
133 /**
134 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
135 */
136 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
137 // TODO Auto-generated method stub
138 }
139
140 }