[24641] | 1 | /**********************************************************************
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| 2 | *
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| 3 | * SharedSoleneQueryResult.java
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| 4 | *
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| 5 | * Copyright 2007 The New Zealand Digital Library Project
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| 6 | *
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| 7 | * A component of the Greenstone digital library software
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| 8 | * from the New Zealand Digital Library Project at the
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| 9 | * University of Waikato, New Zealand.
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| 10 | *
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| 11 | * This program is free software; you can redistribute it and/or modify
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| 12 | * it under the terms of the GNU General Public License as published by
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| 13 | * the Free Software Foundation; either version 2 of the License, or
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| 14 | * (at your option) any later version.
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| 15 | *
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| 16 | * This program is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | * GNU General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with this program; if not, write to the Free Software
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| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | *
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| 25 | *********************************************************************/
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| 26 |
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| 27 | package org.greenstone.LuceneWrapper;
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| 28 |
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| 29 | import java.util.Vector;
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| 30 |
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| 31 | /** a QueryResult class for a lucene search
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| 32 | *
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| 33 | */
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| 34 | public class SharedSoleneQueryResult {
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| 35 |
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| 36 | public static final int NO_ERROR = 0;
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| 37 | public static final int PARSE_ERROR = 1;
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| 38 | public static final int TOO_MANY_CLAUSES_ERROR = 2;
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| 39 | public static final int IO_ERROR = 3;
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| 40 | public static final int SERVER_ERROR = 4;
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| 41 | public static final int OTHER_ERROR = 5;
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| 42 |
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| 43 | /** the list of DocInfo */
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| 44 | protected Vector docs_=null;
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| 45 | /** the list of TermInfo */
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| 46 | protected Vector terms_=null;
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| 47 | /** the list of stopwords found in the query */
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| 48 | protected Vector stopwords_ = null;
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| 49 | /** the total number of docs found - not necessarily the size of docs_*/
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| 50 | protected int total_num_docs_=0;
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| 51 | /** the start result number if we are retrieving only a portion of the results */
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| 52 | protected int start_results_ = 0;
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| 53 | /** the end result number if we are retrieving only a portion of the results */
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| 54 | protected int end_results_ = 0;
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| 55 | /** whether an error has occurred and what kind it is*/
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| 56 | protected int error_ = NO_ERROR;
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| 57 |
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| 58 | public SharedSoleneQueryResult() {
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| 59 | docs_ = new Vector();
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| 60 | terms_ = new Vector();
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| 61 | stopwords_ = new Vector();
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| 62 | }
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| 63 |
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| 64 | /** clear the info from the last query - should be called before setting any new docs/terms */
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| 65 | public void clear() {
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| 66 | total_num_docs_=0;
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| 67 | docs_.clear();
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| 68 | terms_.clear();
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| 69 | stopwords_.clear();
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| 70 | error_ = NO_ERROR;
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| 71 | }
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| 72 |
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| 73 | /** returns the result as a String - useful for printing out results */
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| 74 | public String toString() {
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| 75 |
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| 76 | String result = "";
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| 77 | result += "docs (ranks): ";
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| 78 | for (int i=0; i<docs_.size(); i++) {
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| 79 | result += ((DocInfo)docs_.elementAt(i)).toString()+", ";
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| 80 | }
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| 81 | result += "\nterms: ";
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| 82 | for (int i=0; i<terms_.size(); i++) {
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| 83 | result += ((TermInfo)terms_.elementAt(i)).toString()+", ";
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| 84 | }
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| 85 | result += "\nactual number of docs found = "+total_num_docs_;
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| 86 |
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| 87 | return result;
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| 88 | }
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| 89 | /** a shorter representation - just terms and total docs - not the
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| 90 | individual docnums and ranks */
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| 91 | public String toShortString() {
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| 92 | String result = "";
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| 93 | result += "\nterms: ";
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| 94 | for (int i=0; i<terms_.size(); i++) {
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| 95 | result += ((TermInfo)terms_.elementAt(i)).toString()+", ";
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| 96 | }
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| 97 | result += "\nactual number of docs found = "+total_num_docs_;
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| 98 | return result;
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| 99 | }
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| 100 |
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| 101 | public void setTotalDocs(int num) {
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| 102 | total_num_docs_=num;
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| 103 | }
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| 104 |
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| 105 | public void setStartResults(int start) {
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| 106 | start_results_ = start;
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| 107 | }
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| 108 |
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| 109 | public void setEndResults(int end) {
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| 110 | end_results_ = end;
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| 111 | }
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| 112 |
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| 113 | public void addDoc(String id, float rank, int termfreq)
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| 114 | {
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| 115 | docs_.add(new DocInfo(id, rank, termfreq));
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| 116 | }
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| 117 |
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| 118 | public void addTerm(String term, String field, int match, int freq) {
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| 119 | TermInfo ti = new TermInfo();
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| 120 | ti.term_=term;
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| 121 | ti.field_=field;
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| 122 | ti.match_docs_=match;
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| 123 | ti.term_freq_=freq;
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| 124 | terms_.add(ti);
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| 125 | }
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| 126 | public void addStopWord(String stopword) {
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| 127 | stopwords_.add(stopword);
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| 128 | }
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| 129 | public Vector getDocs() {
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| 130 | return docs_;
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| 131 | }
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| 132 |
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| 133 | public int getError() {
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| 134 | return error_;
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| 135 | }
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| 136 |
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| 137 | public String getErrorString() {
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| 138 | if (error_ == PARSE_ERROR) {
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| 139 | return "PARSE_EXCEPTION";
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| 140 | }
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| 141 | if (error_ == TOO_MANY_CLAUSES_ERROR) {
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| 142 | return "TOO_MANY_CLAUSES";
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| 143 | }
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| 144 | if (error_ == IO_ERROR) {
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| 145 | return "IO_ERROR";
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| 146 | }
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| 147 | if (error_ == NO_ERROR) {
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| 148 | return "NO_ERROR";
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| 149 | }
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| 150 | return "UNKNOWN";
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| 151 | }
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| 152 |
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| 153 | public Vector getTerms() {
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| 154 | return terms_;
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| 155 | }
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| 156 |
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| 157 | public Vector getStopWords() {
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| 158 | return stopwords_;
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| 159 | }
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| 160 | public int getTotalDocs() {
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| 161 | return total_num_docs_;
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| 162 | }
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| 163 |
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| 164 | public void setError(int error) {
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| 165 | error_ = error;
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| 166 | }
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| 167 |
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| 168 | public String getXMLString() {
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| 169 | StringBuffer buffer = new StringBuffer();
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| 170 |
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| 171 | // terms
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| 172 | buffer.append("<QueryTermsInfo num=\"" + terms_.size() + "\"/>\n");
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| 173 | for (int i=0; i<terms_.size(); i++) {
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| 174 | buffer.append(((TermInfo)terms_.elementAt(i)).toXMLString()+"\n");
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| 175 | }
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| 176 |
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| 177 | // stopwords
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| 178 | for (int i=0; i<stopwords_.size(); i++) {
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| 179 | buffer.append("<StopWord value=\"" + (String)stopwords_.elementAt(i)+"\" />\n");
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| 180 | }
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| 181 |
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| 182 | // results
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| 183 | buffer.append("<MatchingDocsInfo num=\"" + total_num_docs_ + "\"/>\n");
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| 184 | buffer.append("<StartResults num=\"" + start_results_ + "\"/>\n");
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| 185 | buffer.append("<EndResults num=\"" + end_results_ + "\"/>\n");
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| 186 |
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| 187 | for (int i=0; i< docs_.size(); i++) {
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| 188 | buffer.append(((DocInfo)docs_.elementAt(i)).toXMLString()+"\n");
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| 189 | }
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| 190 |
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| 191 | return buffer.toString();
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| 192 | }
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| 193 |
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| 194 |
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| 195 | public class TermInfo {
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| 196 |
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| 197 | /** the term itself */
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| 198 | public String term_=null;
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| 199 | /** the field for which this term was queried */
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| 200 | public String field_=null;
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| 201 | /** the number of documents containing this term */
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| 202 | public int match_docs_=0;
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| 203 | /** overall term freq for this term */
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| 204 | public int term_freq_=0;
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| 205 |
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| 206 | public TermInfo() {
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| 207 | }
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| 208 |
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| 209 | /** output the class as a string */
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| 210 | public String toString() {
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| 211 | String result="";
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| 212 | result +="<"+field_+">\""+term_+" docs("+match_docs_;
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| 213 | result +=")freq("+term_freq_+")";
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| 214 | return result;
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| 215 | }
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| 216 |
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| 217 | /** output as an XML element */
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| 218 | public String toXMLString() {
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| 219 | return "<Term value=\"" + xmlSafe(term_) + "\" field=\"" + field_ + "\" freq=\"" + term_freq_ + "\" />";
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| 220 | }
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| 221 | }
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| 222 |
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| 223 |
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| 224 | public class DocInfo
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| 225 | {
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| 226 | public String id_ = "";
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| 227 | public float rank_ = 0;
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| 228 | public int termfreq_ = 0;
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| 229 |
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| 230 | public DocInfo (String id, float rank, int termfreq)
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| 231 | {
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| 232 | id_ = id;
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| 233 | rank_ = rank;
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| 234 | termfreq_ = termfreq;
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| 235 | }
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| 236 |
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| 237 | public String toString()
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| 238 | {
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| 239 | return "" + id_ + " (" + rank_ + ") (" + termfreq_ + ")";
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| 240 | }
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| 241 |
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| 242 | public String toXMLString()
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| 243 | {
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| 244 | return "<Match id=\"" + id_ + "\" rank=\"" + rank_ + "\" termfreq=\"" + termfreq_ + "\" />";
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| 245 | }
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| 246 | }
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| 247 |
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| 248 |
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| 249 | // where should this go???
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| 250 | public static String xmlSafe(String text) {
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| 251 | text = text.replaceAll("&","&amp;");
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| 252 | text = text.replaceAll("<","&lt;");
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| 253 | text = text.replaceAll(">","&gt;");
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| 254 | text = text.replaceAll("'","&#039;");
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| 255 | text = text.replaceAll("\\\"","&quot;");
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| 256 | return text;
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| 257 | }
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| 258 |
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| 259 | }
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