Current File : //home/waritko/yacy/source/net/yacy/cora/lod/vocabulary/YaCyMetadata.java
/**
* YaCyMetadata
* Copyright 2011 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
* First released 16.12.2011 at http://yacy.net
*
* $LastChangedDate: 2011-04-14 00:04:23 +0200 (Do, 14 Apr 2011) $
* $LastChangedRevision: 7653 $
* $LastChangedBy: orbiter $
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program in the file lgpl21.txt
* If not, see <http://www.gnu.org/licenses/>.
*/
package net.yacy.cora.lod.vocabulary;
import java.util.Set;
import net.yacy.cora.document.encoding.ASCII;
import net.yacy.cora.lod.Literal;
import net.yacy.cora.lod.Vocabulary;
/**
* this is the vocabulary of the 'classic' YaCy metadata database
*/
public enum YaCyMetadata implements Vocabulary {
hash, // the url's hash
host, // the url's host
path, // the path element of the url without file bname
file, // the file name inside the url
mod, // last-modified from the httpd
load, // time when the url was loaded
fresh, // time until this url is fresh
referrer, // (one of) the url's referrer hash(es)
md5, // the md5 of the url content (to identify changes)
size, // size of file in bytes
sizename, // printable version of the size
wc, // size of file by number of words; for video and audio: seconds
dt, // doctype, taken from extension or any other heuristic
flags, // flags; any stuff (see Word-Entity definition)
lang, // language
llocal, // # of outlinks to same domain; for video and image: width
lother, // # of outlinks to outside domain; for video and image: height
limage, // # of embedded image links
laudio, // # of embedded audio links; for audio: track number; for video: number of audio tracks
lvideo, // # of embedded video links
lapp; // # of embedded links to applications
/*
"String hash-12, " + // the url's hash
"Cardinal mod-4 {b256}, " + // last-modified from the httpd
"Cardinal load-4 {b256}, " + // time when the url was loaded
"Cardinal fresh-4 {b256}, " + // time until this url is fresh
"String referrer-12, " + // (one of) the url's referrer hash(es)
"byte[] md5-8, " + // the md5 of the url content (to identify changes)
"Cardinal size-6 {b256}, " + // size of file in bytes
"Cardinal wc-3 {b256}, " + // size of file by number of words; for video and audio: seconds
"byte[] dt-1, " + // doctype, taken from extension or any other heuristic
"Bitfield flags-4, " + // flags; any stuff (see Word-Entity definition)
"String lang-2, " + // language
"Cardinal llocal-2 {b256}, " + // # of outlinks to same domain; for video and image: width
"Cardinal lother-2 {b256}, " + // # of outlinks to outside domain; for video and image: height
"Cardinal limage-2 {b256}, " + // # of embedded image links
"Cardinal laudio-2 {b256}, " + // # of embedded audio links; for audio: track number; for video: number of audio tracks
"Cardinal lvideo-2 {b256}, " + // # of embedded video links
"Cardinal lapp-2 {b256}", // # of embedded links to applications
*/
public final static byte[] HASH_PREFIX = ASCII.getBytes("http://yacy.net/url#");
public final static int HASH_PREFIX_LENGTH = HASH_PREFIX.length;
public final static String NAMESPACE = "http://yacy.net/md#";
public final static String PREFIX = "yacy";
private final String predicate;
public static String hashURI(byte[] hash) {
byte[] b = new byte[HASH_PREFIX_LENGTH + hash.length];
System.arraycopy(HASH_PREFIX, 0, b, 0, HASH_PREFIX_LENGTH);
System.arraycopy(hash, 0, b, HASH_PREFIX_LENGTH, hash.length);
return ASCII.String(b);
}
private YaCyMetadata() {
this.predicate = NAMESPACE + this.name();
}
@Override
public String getNamespace() {
return NAMESPACE;
}
@Override
public String getNamespacePrefix() {
return PREFIX;
}
@Override
public Set<Literal> getLiterals() {
return null;
}
@Override
public String getPredicate() {
return this.predicate;
}
@Override
public String getURIref() {
return PREFIX + ':' + this.name();
}
}
Mini Shell