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/**
* LanguageNavigator.java
* (C) 2016 by reger24; https://github.com/reger24
*
* This is a part of YaCy, a peer-to-peer based web search engine
*
* 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, see <http://www.gnu.org/licenses/>.
*/
package net.yacy.search.navigator;
import java.util.Collection;
import net.yacy.cora.sorting.ScoreMap;
import net.yacy.kelondro.data.meta.URIMetadataNode;
import net.yacy.kelondro.util.ISO639;
import net.yacy.search.query.QueryModifier;
import net.yacy.search.schema.CollectionSchema;
/**
* Navigator for languages, restricting items to known languages and returning
* long language names as display names.
*/
public class LanguageNavigator extends StringNavigator implements Navigator {
/**
* Default constructor, using the default YaCy Solr field language_s.
*
* @param title the navigator display name
* @param sort the sort properties to apply when iterating over keys with the
* {@link #navigatorKeys()} function
*/
public LanguageNavigator(final String title, final NavigatorSort sort) {
super(title, CollectionSchema.language_s, sort);
}
/**
* Increases counter for language (if language known)
* @param lang
*/
@Override
public void inc(final String lang) {
if (ISO639.exists(lang)) {
super.inc(lang);
}
}
/**
* Increases counter for languages in scoremap. Each language from the
* scoremap is checked it known
* @param map
*/
@Override
public void inc(ScoreMap<String> map) {
if (map == null) {
return;
}
for (String entry : map) {
if (ISO639.exists(entry)) {
int count = map.get(entry);
if (count > 0) {
this.inc(entry, count);
}
}
}
}
/**
* Increase the score for the key value contained in the defined field in
* the doc, if no language info in doc try to use associated word reference.
* @param doc URIMetadataNode with field for the key content
*/
@Override
public void incDoc(URIMetadataNode doc) {
if (field != null) {
Object val = doc.getFieldValue(field.getSolrFieldName());
if (val != null) {
if (val instanceof Collection) {
Collection<?> ll = (Collection<?>) val;
for (Object obj : ll) {
if (obj instanceof String) {
final String s = (String) obj;
if (!s.isEmpty()) {
this.inc(s);
}
}
}
} else {
this.inc((String) val);
}
} else {
if (doc.word() != null && doc.word().getLanguageString() != null) {
/* Increase the language navigator here only if the word reference
* did not include information about language. Otherwise it should be done earlier in addRWIs() */
final String lang = doc.word().getLanguageString();
this.inc(lang);
}
}
}
}
@Override
public String getQueryModifier(final String key) {
return "/language/" + key;
}
/**
* Convert language code to long display name
* @param lng language code
* @return display name of language
*/
@Override
public String getElementDisplayName(final String lng) {
String longname = ISO639.country(lng);
if (longname == null) {
return lng;
}
return longname;
}
/**
* Checks the query modifier.language string
* @param modifier
* @param name language code
* @return true if contained in modifier.language
*/
@Override
public boolean modifieractive(final QueryModifier modifier, final String name) {
return modifier.language != null && modifier.language.contains(name);
}
}
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