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197 lines
7.7 KiB
197 lines
7.7 KiB
// plasmaSearchQuery.java
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// -----------------------
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// part of YACY
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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// Created: 10.10.2005
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma;
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import java.util.HashSet;
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import java.util.Set;
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import java.util.TreeSet;
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import java.util.Iterator;
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import de.anomic.htmlFilter.htmlFilterAbstractScraper;
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import de.anomic.index.indexEntryAttribute;
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import de.anomic.kelondro.kelondroNaturalOrder;
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import de.anomic.server.serverCharBuffer;
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public final class plasmaSearchQuery {
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public static final int SEARCHDOM_LOCAL = 0;
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public static final int SEARCHDOM_GROUPDHT = 1;
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public static final int SEARCHDOM_GROUPALL = 2;
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public static final int SEARCHDOM_GLOBALDHT = 3;
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public static final int SEARCHDOM_GLOBALALL = 4;
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public Set queryWords, queryHashes;
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public int wantedResults;
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public String prefer;
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public long maximumTime;
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public String urlMask;
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public int domType;
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public String domGroupName;
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public int domMaxTargets;
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public int maxDistance;
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public plasmaSearchQuery(Set queryWords, int maxDistance, String prefer,
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int wantedResults, long maximumTime, String urlMask,
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int domType, String domGroupName, int domMaxTargets) {
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this.queryWords = queryWords;
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this.maxDistance = maxDistance;
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this.prefer = prefer;
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this.queryHashes = words2hashes(queryWords);
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this.wantedResults = wantedResults;
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this.maximumTime = maximumTime;
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this.urlMask = urlMask;
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this.domType = domType;
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this.domGroupName = domGroupName;
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this.domMaxTargets = domMaxTargets;
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}
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public plasmaSearchQuery(Set queryHashes, int maxDistance, String prefer,
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int wantedResults, long maximumTime, String urlMask) {
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this.queryWords = null;
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this.maxDistance = maxDistance;
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this.prefer = prefer;
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this.queryHashes = queryHashes;
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this.wantedResults = wantedResults;
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this.maximumTime = maximumTime;
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this.urlMask = urlMask;
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this.domType = -1;
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this.domGroupName = null;
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this.domMaxTargets = -1;
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}
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public static Set words2hashSet(String[] words) {
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TreeSet hashes = new TreeSet();
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for (int i = 0; i < words.length; i++) hashes.add(indexEntryAttribute.word2hash(words[i]));
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return hashes;
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}
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public static String words2hashString(String[] words) {
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StringBuffer sb = new StringBuffer();
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for (int i = 0; i < words.length; i++) sb.append(indexEntryAttribute.word2hash(words[i]));
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return new String(sb);
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}
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public static Set words2hashes(Set words) {
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Iterator i = words.iterator();
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TreeSet hashes = new TreeSet();
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while (i.hasNext()) hashes.add(indexEntryAttribute.word2hash((String) i.next()));
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return hashes;
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}
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public static Set hashes2Set(String query) {
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if (query == null) return new HashSet();
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final HashSet keyhashes = new HashSet(query.length() / indexEntryAttribute.wordHashLength);
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for (int i = 0; i < (query.length() / indexEntryAttribute.wordHashLength); i++) {
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keyhashes.add(query.substring(i * indexEntryAttribute.wordHashLength, (i + 1) * indexEntryAttribute.wordHashLength));
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}
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return keyhashes;
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}
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public static String hashSet2hashString(Set words) {
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Iterator i = words.iterator();
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StringBuffer sb = new StringBuffer(words.size() * indexEntryAttribute.wordHashLength);
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while (i.hasNext()) sb.append((String) i.next());
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return new String(sb);
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}
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public static TreeSet cleanQuery(String words) {
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// convert Umlaute
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words = htmlFilterAbstractScraper.convertUmlaute(new serverCharBuffer(words.toCharArray())).toString();
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// remove funny symbols
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final String seps = "' .,:/-&";
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words = words.toLowerCase().trim();
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int c;
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for (int i = 0; i < seps.length(); i++) {
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if ((c = words.indexOf(seps.charAt(i))) >= 0) { words = words.substring(0, c) + (((c + 1) < words.length()) ? (" " + words.substring(c + 1)) : ""); }
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}
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// the string is clean now, but we must generate a set out of it
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final TreeSet query = new TreeSet(kelondroNaturalOrder.naturalOrder);
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if (words.length() == 0) return query; // split returns always one element
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final String[] a = words.split(" ");
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for (int i = 0; i < a.length; i++) { query.add(a[i]); }
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return query;
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}
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public int size() {
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return queryHashes.size();
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}
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public String words(String separator) {
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if (queryWords == null) return "";
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StringBuffer result = new StringBuffer(8 * queryWords.size());
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Iterator i = queryWords.iterator();
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if (i.hasNext()) result.append((String) i.next());
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while (i.hasNext()) {
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result.append(separator);
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result.append((String) i.next());
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}
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return result.toString();
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}
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/*
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public String hashes(String separator) {
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StringBuffer result = new StringBuffer(8 * queryHashes.size());
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Iterator i = queryHashes.iterator();
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if (i.hasNext()) result.append((String) i.next());
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while (i.hasNext()) {
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result.append(separator);
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result.append((String) i.next());
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}
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return result.toString();
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}
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*/
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public void filterOut(Set blueList) {
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// filter out words that appear in this set
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Iterator it = queryWords.iterator();
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String word;
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while (it.hasNext()) {
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word = (String) it.next();
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if (blueList.contains(word)) it.remove();
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}
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}
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}
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