| /* |
| * 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.index; |
| |
| import org.apache.lucene.index.MergePolicy; |
| import org.apache.lucene.search.Sort; |
| import org.apache.solr.core.SolrResourceLoader; |
| import org.apache.solr.schema.IndexSchema; |
| import org.apache.solr.search.SortSpecParsing; |
| |
| import static org.apache.solr.common.params.CommonParams.SORT; |
| |
| /** |
| * A {@link MergePolicyFactory} for {@code SortingMergePolicy} objects. |
| */ |
| public class SortingMergePolicyFactory extends WrapperMergePolicyFactory { |
| |
| protected final Sort mergeSort; |
| |
| public SortingMergePolicyFactory(SolrResourceLoader resourceLoader, MergePolicyFactoryArgs args, IndexSchema schema) { |
| super(resourceLoader, args, schema); |
| final String sortArg = (String) args.remove(SORT); |
| if (sortArg == null) { |
| throw new IllegalArgumentException(SortingMergePolicyFactory.class.getSimpleName()+" requires a '"+ SORT + "' argument."); |
| } |
| this.mergeSort = SortSpecParsing.parseSortSpec(sortArg, schema).getSort(); |
| } |
| |
| @Override |
| protected MergePolicy getMergePolicyInstance(MergePolicy wrappedMP) { |
| final MergePolicy mp = new SortingMergePolicy(wrappedMP, mergeSort); |
| return mp; |
| } |
| |
| } |