org.apache.solr.update.processor.RemoveBlankFieldUpdateProcessorFactory Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of solr-core Show documentation
Show all versions of solr-core Show documentation
Apache Solr (module: core)
/*
* 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 static org.apache.solr.update.processor.FieldValueMutatingUpdateProcessor.DELETE_VALUE_SINGLETON;
import static org.apache.solr.update.processor.FieldValueMutatingUpdateProcessor.valueMutator;
import org.apache.solr.request.SolrQueryRequest;
import org.apache.solr.response.SolrQueryResponse;
/**
* Removes any values found which are CharSequence with a length of 0. (ie: empty strings)
*
* By default this processor applies itself to all fields.
*
*
For example, with the configuration listed below, blank strings will be removed from all
* fields except those whose name ends with "_literal
".
*
*
* <processor class="solr.RemoveBlankFieldUpdateProcessorFactory">
* <lst name="exclude">
* <str name="fieldRegex">.*_literal</str>
* </lst>
* </processor>
*
* @since 4.0.0
*/
public final class RemoveBlankFieldUpdateProcessorFactory
extends FieldMutatingUpdateProcessorFactory {
@Override
public UpdateRequestProcessor getInstance(
SolrQueryRequest req, SolrQueryResponse rsp, UpdateRequestProcessor next) {
return valueMutator(
getSelector(),
next,
src -> {
if (src instanceof CharSequence && 0 == ((CharSequence) src).length()) {
return DELETE_VALUE_SINGLETON;
}
return src;
});
}
}