mirror of
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90d569d70f
url storage is part of index management; moved plasmaURL to indexURL git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2122 6c8d7289-2bf4-0310-a012-ef5d649a1542
221 lines
12 KiB
Java
221 lines
12 KiB
Java
// plasmaIndexEntry.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, 2004
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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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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/*
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This class defines the structures of an index entry
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*/
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package de.anomic.plasma;
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import java.util.Properties;
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import de.anomic.index.indexEntry;
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import de.anomic.index.indexEntryAttribute;
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import de.anomic.index.indexEntryPrototype;
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import de.anomic.index.indexURL;
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import de.anomic.kelondro.kelondroBase64Order;
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public final class plasmaWordIndexEntryInstance extends indexEntryPrototype implements Cloneable, indexEntry {
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// an wordEntry can be filled in either of two ways:
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// by the discrete values of the entry
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// or by the encoded entry-string
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// the class instantiation can only be done by a plasmaStore method
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// therefore they are all public
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public plasmaWordIndexEntryInstance(String urlHash,
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int urlLength, // byte-length of complete URL
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int urlComps, // number of path components
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int titleLength, // length of description/length (longer are better?)
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int hitcount, //*how often appears this word in the text
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int wordcount, //*total number of words
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int phrasecount, //*total number of phrases
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int posintext, //*position of word in all words
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int posinphrase, //*position of word in its phrase
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int posofphrase, //*number of the phrase where word appears
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int distance, //*word distance; this is 0 by default, and set to the difference of posintext from two indexes if these are combined (simultanous search). If stored, this shows that the result was obtained by remote search
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int sizeOfPage, // # of bytes of the page
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long lastmodified, //*last-modified time of the document where word appears
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long updatetime, // update time; this is needed to compute a TTL for the word, so it can be removed easily if the TTL is short
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int quality, //*the entropy value
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String language, //*(guessed) language of document
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char doctype, //*type of document
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int outlinksSame, // outlinks to same domain
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int outlinksOther,// outlinks to other domain
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boolean local //*flag shows that this index was generated locally; othervise its from a remote peer
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) {
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// more needed attributes:
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// - boolean: appearance attributes: title, appears in header, anchor-descr, image-tag etc
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// - boolean: URL attributes
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if ((language == null) || (language.length() != indexURL.urlLanguageLength)) language = "uk";
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this.urlHash = urlHash;
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this.hitcount = hitcount;
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this.wordcount = wordcount;
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this.phrasecount = phrasecount;
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this.posintext = posintext;
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this.posinphrase = posinphrase;
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this.posofphrase = posofphrase;
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this.worddistance = distance;
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this.lastModified = lastmodified;
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this.quality = quality;
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this.language = language.getBytes();
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this.doctype = doctype;
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this.localflag = (local) ? indexEntryAttribute.LT_LOCAL : indexEntryAttribute.LT_GLOBAL;
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}
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public plasmaWordIndexEntryInstance(String urlHash, String code) {
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// the code is not parsed but used later on
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this.urlHash = urlHash;
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this.hitcount = (int) kelondroBase64Order.enhancedCoder.decodeLong(code.substring(6, 8));
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this.lastModified = plasmaWordIndex.reverseMicroDateDays((int) kelondroBase64Order.enhancedCoder.decodeLong(code.substring(3, 6)));
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this.quality = (int) kelondroBase64Order.enhancedCoder.decodeLong(code.substring(0, 3));
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this.language = code.substring(8, 10).getBytes();
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this.doctype = code.charAt(10);
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this.localflag = code.charAt(11);
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this.posintext = (code.length() >= 14) ? (int) kelondroBase64Order.enhancedCoder.decodeLong(code.substring(12, 14)) : 0;
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this.posinphrase = (code.length() >= 15) ? (int) kelondroBase64Order.enhancedCoder.decodeLong(code.substring(14, 16)) : 0;
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this.posofphrase = (code.length() >= 17) ? (int) kelondroBase64Order.enhancedCoder.decodeLong(code.substring(16, 18)) : 0;
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this.worddistance = (code.length() >= 19) ? (int) kelondroBase64Order.enhancedCoder.decodeLong(code.substring(18, 20)) : 0;
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this.wordcount = (code.length() >= 21) ? (int) kelondroBase64Order.enhancedCoder.decodeLong(code.substring(20, 22)) : 0;
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this.phrasecount = (code.length() >= 23) ? (int) kelondroBase64Order.enhancedCoder.decodeLong(code.substring(22, 24)) : 0;
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if (hitcount == 0) hitcount = 1;
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if (wordcount == 0) wordcount = 1000;
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if (phrasecount == 0) phrasecount = 100;
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}
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public plasmaWordIndexEntryInstance(String external) {
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// parse external form
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String[] elts = external.substring(1, external.length() - 1).split(",");
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Properties pr = new Properties();
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int p;
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for (int i = 0; i < elts.length; i++) {
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pr.put(elts[i].substring(0, (p = elts[i].indexOf("="))), elts[i].substring(p + 1));
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}
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// set values
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this.urlHash = pr.getProperty("h", "");
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this.hitcount = (int) kelondroBase64Order.enhancedCoder.decodeLong(pr.getProperty("c", "A"));
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this.wordcount = (int) kelondroBase64Order.enhancedCoder.decodeLong(pr.getProperty("w", "__"));
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this.phrasecount = (int) kelondroBase64Order.enhancedCoder.decodeLong(pr.getProperty("p", "__"));
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this.posintext = (int) kelondroBase64Order.enhancedCoder.decodeLong(pr.getProperty("t", "__"));
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this.posinphrase = (int) kelondroBase64Order.enhancedCoder.decodeLong(pr.getProperty("r", "__"));
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this.posofphrase = (int) kelondroBase64Order.enhancedCoder.decodeLong(pr.getProperty("o", "__"));
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this.worddistance = (int) kelondroBase64Order.enhancedCoder.decodeLong(pr.getProperty("i", "__"));
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this.lastModified = plasmaWordIndex.reverseMicroDateDays((int) kelondroBase64Order.enhancedCoder.decodeLong(pr.getProperty("a", "A")));
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this.quality = (int) kelondroBase64Order.enhancedCoder.decodeLong(pr.getProperty("q", "__"));
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this.language = pr.getProperty("l", "uk").getBytes();
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this.doctype = pr.getProperty("d", "u").charAt(0);
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this.localflag = pr.getProperty("f", ""+indexEntryAttribute.LT_LOCAL).charAt(0);
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}
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public Object clone() {
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return new plasmaWordIndexEntryInstance(this.toPropertyForm());
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}
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public static int encodedStringFormLength() {
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// the size of the index entry attributes when encoded to string
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return 24;
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}
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public String toEncodedStringForm() {
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// attention: this integrates NOT the URL hash into the encoding
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// if you need a complete dump, use toExternalForm()
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StringBuffer buf = new StringBuffer(encodedStringFormLength());
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buf.append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.quality, indexURL.urlQualityLength))
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.append(kelondroBase64Order.enhancedCoder.encodeLongSmart(plasmaWordIndex.microDateDays(this.lastModified), 3))
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.append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.hitcount, 2))
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.append(new String(this.language))
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.append(this.doctype)
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.append(this.localflag)
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.append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.posintext, 2))
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.append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.posinphrase, 2))
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.append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.posofphrase, 2))
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.append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.worddistance, 2))
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.append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.wordcount, 2))
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.append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.phrasecount, 2)); // 3+3+2+2+1+1+2+2+2+2+2+2= 24 bytes
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return buf.toString();
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}
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public static int encodedByteArrayFormLength() {
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// the size of the index entry attributes when encoded to string
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return encodedStringFormLength();
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}
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public byte[] toEncodedByteArrayForm() {
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return toEncodedStringForm().getBytes();
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}
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public String toPropertyForm() {
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StringBuffer str = new StringBuffer(61);
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str.append("{")
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.append( "h=").append(this.urlHash)
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.append(",q=").append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.quality, indexURL.urlQualityLength))
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.append(",a=").append(kelondroBase64Order.enhancedCoder.encodeLongSmart(plasmaWordIndex.microDateDays(this.lastModified), 3))
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.append(",c=").append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.hitcount, 2))
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.append(",l=").append(new String(this.language))
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.append(",d=").append(this.doctype)
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.append(",f=").append(this.localflag)
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.append(",t=").append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.posintext, 2))
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.append(",r=").append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.posinphrase, 2))
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.append(",o=").append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.posofphrase, 2))
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.append(",i=").append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.worddistance, 2))
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.append(",w=").append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.wordcount, 2))
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.append(",p=").append(kelondroBase64Order.enhancedCoder.encodeLongSmart(this.phrasecount, 2))
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.append("}");
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return str.toString();
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}
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public static void main(String[] args) {
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// outputs the word hash to a given word
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if (args.length != 1) System.exit(0);
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System.out.println("WORDHASH: " + indexEntryAttribute.word2hash(args[0]));
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}
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}
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