mirror of
https://github.com/yacy/yacy_search_server.git
synced 2024-09-22 00:00:59 +02:00
81 lines
3.0 KiB
Java
81 lines
3.0 KiB
Java
// TermSearch.java
|
|
// ---------------
|
|
// (C) 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
|
|
// first published 3.6.2009 on http://yacy.net
|
|
//
|
|
// This is a part of YaCy, a peer-to-peer based web search engine
|
|
//
|
|
// $LastChangedDate$
|
|
// $LastChangedRevision$
|
|
// $LastChangedBy$
|
|
//
|
|
// 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.kelondro.rwi;
|
|
|
|
import java.util.TreeMap;
|
|
|
|
import net.yacy.cora.order.Base64Order;
|
|
import net.yacy.cora.storage.HandleSet;
|
|
import net.yacy.cora.util.SpaceExceededException;
|
|
|
|
|
|
public class TermSearch <ReferenceType extends Reference> {
|
|
|
|
private final ReferenceContainer<ReferenceType> joinResult;
|
|
TreeMap<byte[], ReferenceContainer<ReferenceType>> inclusionContainers;
|
|
|
|
public TermSearch(
|
|
Index<ReferenceType> base,
|
|
final HandleSet queryHashes,
|
|
final HandleSet excludeHashes,
|
|
final HandleSet urlselection,
|
|
ReferenceFactory<ReferenceType> termFactory,
|
|
int maxDistance) throws SpaceExceededException {
|
|
|
|
this.inclusionContainers =
|
|
(queryHashes.isEmpty()) ?
|
|
new TreeMap<byte[], ReferenceContainer<ReferenceType>>(Base64Order.enhancedCoder) :
|
|
base.searchConjunction(queryHashes, urlselection);
|
|
|
|
if (!this.inclusionContainers.isEmpty() &&
|
|
(this.inclusionContainers.size() < queryHashes.size()))
|
|
this.inclusionContainers = new TreeMap<byte[], ReferenceContainer<ReferenceType>>(Base64Order.enhancedCoder); // prevent that only a subset is returned
|
|
|
|
TreeMap<byte[], ReferenceContainer<ReferenceType>> exclusionContainers =
|
|
(this.inclusionContainers.isEmpty()) ?
|
|
new TreeMap<byte[], ReferenceContainer<ReferenceType>>(Base64Order.enhancedCoder) :
|
|
base.searchConjunction(excludeHashes, urlselection);
|
|
|
|
// join and exclude the result
|
|
this.joinResult = ReferenceContainer.joinExcludeContainers(
|
|
termFactory,
|
|
this.inclusionContainers.values(),
|
|
exclusionContainers.values(),
|
|
maxDistance);
|
|
}
|
|
|
|
public ReferenceContainer<ReferenceType> joined() {
|
|
return this.joinResult;
|
|
}
|
|
|
|
public TreeMap<byte[], ReferenceContainer<ReferenceType>> inclusion() {
|
|
return this.inclusionContainers;
|
|
}
|
|
|
|
}
|