1 | /*
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2 | * GS2MGRetrieve.java
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3 | * Copyright (C) 2005 New Zealand Digital Library, http://www.nzdl.org
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4 | *
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5 | * This program is free software; you can redistribute it and/or modify
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6 | * it under the terms of the GNU General Public License as published by
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7 | * the Free Software Foundation; either version 2 of the License, or
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8 | * (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 | */
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19 | package org.greenstone.gsdl3.service;
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20 |
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21 | // Greenstone classes
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22 | import org.greenstone.mg.*;
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23 | import org.greenstone.gsdl3.core.GSException;
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24 | import org.greenstone.gsdl3.util.GSFile;
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25 | import org.greenstone.gsdl3.util.GSXML;
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26 |
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27 | // XML classes
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28 | import org.w3c.dom.Element;
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29 | import org.w3c.dom.Text;
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30 |
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31 | // General Java classes
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32 | import java.io.File;
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33 |
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34 | public class GS2MGRetrieve
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35 | extends AbstractGS2DocumentRetrieve
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36 | {
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37 | // Elements used in the config file that are specific to this class
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38 | private static final String DEFAULT_INDEX_ELEM = "defaultIndex";
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39 |
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40 | private MGWrapper mg_src = null;
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41 | private String mg_basedir = null;
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42 | private String mg_textdir = null;
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43 | private String default_index = null;
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44 |
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45 | public GS2MGRetrieve() {
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46 | this.mg_src = new MGWrapper();
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47 | }
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48 |
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49 | /** configure this service */
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50 | public boolean configure(Element info, Element extra_info)
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51 | {
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52 | // Do specific configuration
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53 | System.out.println("Configuring GS2MGRetrieve...");
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54 | // System.out.println("info:\n" + converter_.getString(info));
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55 | // System.out.println("extra_info:\n" + converter_.getString(extra_info));
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56 |
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57 | // Get the default index out of <defaultIndex> (buildConfig.xml)
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58 | Element def = (Element) GSXML.getChildByTagName(info, DEFAULT_INDEX_ELEM);
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59 | if (def != null) {
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60 | this.default_index = def.getAttribute(GSXML.NAME_ATT);
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61 | }
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62 | if (this.default_index == null || this.default_index.equals("")) {
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63 | System.err.println("Error: default index not specified!");
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64 | return false;
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65 | }
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66 | // System.out.println("Default index: " + this.default_index);
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67 |
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68 | // The location of the MG index and text files
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69 | mg_basedir = GSFile.collectionBaseDir(this.site_home, this.cluster_name) + File.separatorChar; // Needed by MG
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70 | mg_textdir = GSFile.collectionTextPath(this.cluster_name);
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71 | // index is only needed to start up MG, not used so just use the default index
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72 | String indexpath = GSFile.collectionIndexPath(this.cluster_name, this.default_index);
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73 | this.mg_src.setIndex(indexpath);
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74 |
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75 | // Do generic configuration
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76 | return super.configure(info, extra_info);
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77 | }
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78 |
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79 | /** returns the content of a node
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80 | * should return a nodeContent element:
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81 | * <nodeContent>text content or other elements</nodeContent>
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82 | */
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83 | protected Element getNodeContent(String doc_id) throws GSException {
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84 | String lang = "en"; // **********
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85 | long doc_num = this.gdbm_src.OID2Docnum(doc_id);
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86 | if (doc_num == -1) {
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87 | System.err.println("OID "+doc_id +" couldn't be converted to mg num");
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88 | return null;
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89 | }
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90 | Element content_node = this.doc.createElement(GSXML.NODE_CONTENT_ELEM);
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91 |
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92 | String doc_content = this.mg_src.getDocument(this.mg_basedir,
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93 | this.mg_textdir, doc_num);
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94 |
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95 | if (doc_content!=null) {
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96 | // remove any ctrl-c or ctrl-b
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97 | doc_content = doc_content.replaceAll("\u0002|\u0003", "");
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98 | // replace _httpimg_ with the correct address
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99 | doc_content = resolveTextMacros(doc_content, doc_id, lang);
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100 | //GSXML.addDocText(this.doc, doc, doc_content);
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101 | } else {
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102 | System.err.println("the doc content was null, not getting that section\n");
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103 | doc_content = "couldn't retrieve content for this section\n";
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104 | }
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105 | Text t = this.doc.createTextNode(doc_content);
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106 | content_node.appendChild(t);
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107 | return content_node;
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108 |
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109 | }
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110 |
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111 |
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112 | }
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