org.apache.solr.update.processor.LastFieldValueUpdateProcessorFactory Maven / Gradle / Ivy
/*
* 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.core.SolrCore;
import java.util.Collections;
import java.util.Collection;
import java.util.List;
import java.util.SortedSet;
import java.util.Iterator;
/**
* Keeps only the last value of fields matching the specified
* conditions. Correct behavior assumes that the SolrInputFields being mutated
* are either single valued, or use an ordered Collection (ie: not a Set).
*
* By default, this processor matches no fields.
*
*
*
* For example, in the configuration below, if a field named
* primary_author contained multiple values (ie:
* "Adam Doe", "Bob Smith", "Carla Jones") then only the last
* value (ie: "Carla Jones") will be kept
*
*
*
* <processor class="solr.LastFieldValueUpdateProcessorFactory">
* <str name="fieldName">primary_author</str>
* </processor>
*
*
* @see FirstFieldValueUpdateProcessorFactory
*/
public final class LastFieldValueUpdateProcessorFactory extends FieldValueSubsetUpdateProcessorFactory {
@Override
public Collection