/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.update.processor;
import org.apache.solr.common.params.SolrParams;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.core.SolrCore;
import org.apache.solr.request.SolrQueryRequest;
import org.apache.solr.response.SolrQueryResponse;
import org.apache.solr.util.SolrPluginUtils;
import org.apache.solr.util.plugin.SolrCoreAware;
/**
* Identifies the language of a set of input fields using Tika's
* LanguageIdentifier. The tika-core-x.y.jar must be on the classpath
* <p>
* The UpdateProcessorChain config entry can take a number of parameters
* which may also be passed as HTTP parameters on the update request
* and override the defaults. Here is the simplest processor config possible:
*
* <pre class="prettyprint" >
* <processor class="org.apache.solr.update.processor.TikaLanguageIdentifierUpdateProcessorFactory">
* <str name="langid.fl">title,text</str>
* <str name="langid.langField">language_s</str>
* </processor>
* </pre>
* See <a href="http://wiki.apache.org/solr/LanguageDetection">http://wiki.apache.org/solr/LanguageDetection</a>
* @since 3.5
*/
public class TikaLanguageIdentifierUpdateProcessorFactory extends
UpdateRequestProcessorFactory implements SolrCoreAware, LangIdParams {
protected SolrParams defaults;
protected SolrParams appends;
protected SolrParams invariants;
@Override
public void inform(SolrCore core) {
}
/**
* The UpdateRequestProcessor may be initialized in solrconfig.xml similarly
* to a RequestHandler, with defaults, appends and invariants.
* @param args a NamedList with the configuration parameters
*/
@Override
@SuppressWarnings("rawtypes")
public void init( NamedList args )
{
if (args != null) {
Object o;
o = args.get("defaults");
if (o != null && o instanceof NamedList) {
defaults = SolrParams.toSolrParams((NamedList) o);
} else {
defaults = SolrParams.toSolrParams(args);
}
o = args.get("appends");
if (o != null && o instanceof NamedList) {
appends = SolrParams.toSolrParams((NamedList) o);
}
o = args.get("invariants");
if (o != null && o instanceof NamedList) {
invariants = SolrParams.toSolrParams((NamedList) o);
}
}
}
@Override
public UpdateRequestProcessor getInstance(SolrQueryRequest req,
SolrQueryResponse rsp, UpdateRequestProcessor next) {
// Process defaults, appends and invariants if we got a request
if(req != null) {
SolrPluginUtils.setDefaults(req, defaults, appends, invariants);
}
return new TikaLanguageIdentifierUpdateProcessor(req, rsp, next);
}
}