You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
292 lines
8.9 KiB
292 lines
8.9 KiB
// DCEntry.java
|
|
// (C) 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
|
|
// first published 15.04.2009 on http://yacy.net
|
|
//
|
|
// $LastChangedDate$
|
|
// $LastChangedRevision$
|
|
// $LastChangedBy$
|
|
//
|
|
// LICENSE
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
|
|
package net.yacy.document.content;
|
|
|
|
import java.io.IOException;
|
|
import java.io.OutputStreamWriter;
|
|
import java.net.MalformedURLException;
|
|
import java.text.Collator;
|
|
import java.text.ParseException;
|
|
import java.util.Date;
|
|
import java.util.HashSet;
|
|
import java.util.Locale;
|
|
import java.util.TreeMap;
|
|
|
|
import net.yacy.cora.date.ISO8601Formatter;
|
|
import net.yacy.document.Document;
|
|
import net.yacy.kelondro.data.meta.DigestURI;
|
|
import net.yacy.kelondro.logging.Log;
|
|
|
|
public class DCEntry extends TreeMap<String, String> {
|
|
|
|
private static final long serialVersionUID = -2050291583515701559L;
|
|
|
|
// use a collator to relax when distinguishing between lowercase und uppercase letters
|
|
private static final Collator insensitiveCollator = Collator.getInstance(Locale.US);
|
|
static {
|
|
insensitiveCollator.setStrength(Collator.SECONDARY);
|
|
insensitiveCollator.setDecomposition(Collator.NO_DECOMPOSITION);
|
|
}
|
|
public static final DCEntry poison = new DCEntry();
|
|
|
|
public DCEntry() {
|
|
super((Collator) insensitiveCollator.clone());
|
|
}
|
|
|
|
public DCEntry(
|
|
DigestURI url,
|
|
Date date,
|
|
String title,
|
|
String author,
|
|
String body,
|
|
double lat,
|
|
double lon
|
|
) {
|
|
super((Collator) insensitiveCollator.clone());
|
|
this.put("dc:identifier", url.toNormalform(true, false));
|
|
this.put("dc:date", ISO8601Formatter.FORMATTER.format(date));
|
|
this.put("dc:title", title);
|
|
this.put("dc:creator", author);
|
|
this.put("dc:description", body);
|
|
this.put("geo:lat", Double.toString(lat));
|
|
this.put("geo:long", Double.toString(lon));
|
|
}
|
|
|
|
/*
|
|
DC according to rfc 5013
|
|
|
|
* dc_title
|
|
* dc_creator
|
|
* dc_subject
|
|
* dc_description
|
|
* dc_publisher
|
|
dc_contributor
|
|
dc_date
|
|
dc_type
|
|
* dc_format
|
|
* dc_identifier
|
|
* dc_source
|
|
dc_language
|
|
dc_relation
|
|
dc_coverage
|
|
dc_rights
|
|
*/
|
|
public Date getDate() {
|
|
String d = this.get("docdatetime");
|
|
if (d == null) d = this.get("dc:date");
|
|
if (d == null) return null;
|
|
if (d.isEmpty()) return null;
|
|
try {
|
|
return ISO8601Formatter.FORMATTER.parse(d);
|
|
} catch (ParseException e) {
|
|
Log.logException(e);
|
|
return new Date();
|
|
}
|
|
}
|
|
|
|
public DigestURI getIdentifier(boolean useRelationAsAlternative) {
|
|
String u = this.get("url");
|
|
if (u == null) u = this.get("dc:identifier");
|
|
if (u == null) return useRelationAsAlternative ? getRelation() : null;
|
|
String[] urls = u.split(";");
|
|
if (urls.length > 1) {
|
|
// select one that fits
|
|
u = bestU(urls);
|
|
}
|
|
try {
|
|
return new DigestURI(u);
|
|
} catch (MalformedURLException e) {
|
|
if (useRelationAsAlternative) {
|
|
DigestURI relation = this.getRelation();
|
|
if (relation != null) return relation;
|
|
Log.logWarning("DCEntry", "getIdentifier: url is bad, relation also: " + e.getMessage());
|
|
}
|
|
Log.logWarning("DCEntry", "getIdentifier: url is bad: " + e.getMessage());
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public DigestURI getRelation() {
|
|
String u = this.get("dc:relation");
|
|
if (u == null) return null;
|
|
String[] urls = u.split(";");
|
|
if (urls.length > 1) {
|
|
// select one that fits
|
|
u = bestU(urls);
|
|
}
|
|
try {
|
|
return new DigestURI(u);
|
|
} catch (MalformedURLException e) {
|
|
Log.logWarning("DCEntry", "getRelation: url is bad: " + e.getMessage());
|
|
return null;
|
|
}
|
|
}
|
|
|
|
private static String bestU(String[] urls) {
|
|
for (String uu: urls) {
|
|
if (uu.startsWith("http://") && (uu.endsWith(".html") || uu.endsWith(".htm") || uu.endsWith(".pdf") || uu.endsWith(".doc") || uu.endsWith(".rss") || uu.endsWith(".xml"))) return uu;
|
|
}
|
|
for (String uu: urls) {
|
|
if (uu.startsWith("http://")) return uu;
|
|
}
|
|
for (String uu: urls) {
|
|
if (uu.startsWith("ftp://")) return uu;
|
|
}
|
|
for (String uu: urls) {
|
|
//urn identifier koennen ueber den resolver der d-nb aufgeloest werden:
|
|
//http://nbn-resolving.de/urn:nbn:de:bsz:960-opus-1860
|
|
if (uu.startsWith("urn:")) return "http://nbn-resolving.de/" + uu;
|
|
}
|
|
return urls[0];
|
|
}
|
|
|
|
//modified by copperdust; Ukraine, 2012
|
|
public String getLanguage() {//final language computation
|
|
String l = this.get("dc:language");//from document metainfo
|
|
if (l == null) l = getIdentifier(true).language();//from symbolic frequency table
|
|
if (l == null) return this.get("language");//from TLD
|
|
return l;
|
|
}
|
|
|
|
public String getType() {
|
|
String t = this.get("dc:type");
|
|
if (t == null) return "";
|
|
return t;
|
|
}
|
|
|
|
public String getFormat() {
|
|
String t = this.get("dc:format");
|
|
if (t == null) return "";
|
|
return t;
|
|
}
|
|
|
|
public String getSource() {
|
|
String t = this.get("dc:source");
|
|
if (t == null) return "";
|
|
return t;
|
|
}
|
|
|
|
public String getRights() {
|
|
String t = this.get("dc:rights");
|
|
if (t == null) return "";
|
|
return t;
|
|
}
|
|
|
|
public String getTitle() {
|
|
String t = this.get("title");
|
|
if (t == null) t = this.get("dc:title");
|
|
t = stripCDATA(t);
|
|
if (t == null) return "";
|
|
return t;
|
|
}
|
|
|
|
public String getPublisher() {
|
|
String t = this.get("dc:publisher");
|
|
t = stripCDATA(t);
|
|
if (t == null) return "";
|
|
return t;
|
|
}
|
|
|
|
public String getCreator() {
|
|
String t = this.get("author");
|
|
if (t == null) t = this.get("dc:creator");
|
|
t = stripCDATA(t);
|
|
if (t == null) return "";
|
|
return t;
|
|
}
|
|
|
|
public String getDescription() {
|
|
String t = this.get("body");
|
|
if (t == null) t = this.get("dc:description");
|
|
t = stripCDATA(t);
|
|
if (t == null) return "";
|
|
return t;
|
|
}
|
|
|
|
public String[] getSubject() {
|
|
String t = this.get("categories");
|
|
if (t == null) t = this.get("dc:subject");
|
|
t = stripCDATA(t);
|
|
if (t == null) return new String[]{};
|
|
return t.split(";");
|
|
}
|
|
|
|
public double getLon() {
|
|
String t = this.get("geo:long");
|
|
if (t == null) t = this.get("geo:lon");
|
|
t = stripCDATA(t);
|
|
if (t == null) return 0.0d;
|
|
return Double.parseDouble(t);
|
|
}
|
|
|
|
public double getLat() {
|
|
String t = this.get("geo:lat");
|
|
if (t == null) t = this.get("geo:lat");
|
|
t = stripCDATA(t);
|
|
if (t == null) return 0.0d;
|
|
return Double.parseDouble(t);
|
|
}
|
|
|
|
private static String stripCDATA(String s) {
|
|
if (s == null) return null;
|
|
s = s.trim();
|
|
if (s.startsWith("<![CDATA[")) s = s.substring(9);
|
|
if (s.endsWith("]]")) s = s.substring(0, s.length() - 2);
|
|
return s;
|
|
}
|
|
|
|
public Document document() {
|
|
HashSet<String> languages = new HashSet<String>();
|
|
languages.add(getLanguage());
|
|
|
|
return new Document(
|
|
getIdentifier(true),
|
|
"text/html",
|
|
"UTF-8",
|
|
this,
|
|
languages,
|
|
getSubject(),
|
|
getTitle(),
|
|
getCreator(),
|
|
getPublisher(),
|
|
null,
|
|
"",
|
|
getLon(), getLat(),
|
|
getDescription(),
|
|
null,
|
|
null,
|
|
null,
|
|
false);
|
|
}
|
|
|
|
public void writeXML(OutputStreamWriter os) throws IOException {
|
|
Document doc = document();
|
|
if (doc != null) {
|
|
doc.writeXML(os, this.getDate());
|
|
}
|
|
}
|
|
}
|