| /* |
| * 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.commons.lang3.StringUtils; |
| import org.apache.solr.common.SolrInputField; |
| 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.schema.FieldType; |
| import org.apache.solr.schema.IndexSchema; |
| import org.apache.solr.schema.SchemaField; |
| import org.apache.solr.schema.StrField; |
| import org.apache.solr.schema.TextField; |
| |
| import static org.apache.solr.update.processor.FieldMutatingUpdateProcessor.mutator; |
| |
| /** |
| * Concatenates multiple values for fields matching the specified |
| * conditions using a configurable <code>delimiter</code> which defaults |
| * to "<code>, </code>". |
| * <p> |
| * By default, this processor concatenates the values for any field name |
| * which according to the schema is <code>multiValued="false"</code> |
| * and uses <code>TextField</code> or <code>StrField</code> |
| * </p> |
| * |
| * <p> |
| * For example, in the configuration below, any "single valued" string and |
| * text field which is found to contain multiple values <i>except</i> for |
| * the <code>primary_author</code> field will be concatenated using the |
| * string "<code>; </code>" as a delimiter. For the |
| * <code>primary_author</code> field, the multiple values will be left |
| * alone for <code>FirstFieldValueUpdateProcessorFactory</code> to deal with. |
| * </p> |
| * |
| * <pre class="prettyprint"> |
| * <processor class="solr.ConcatFieldUpdateProcessorFactory"> |
| * <str name="delimiter">; </str> |
| * <lst name="exclude"> |
| * <str name="fieldName">primary_author</str> |
| * </lst> |
| * </processor> |
| * <processor class="solr.FirstFieldValueUpdateProcessorFactory"> |
| * <str name="fieldName">primary_author</str> |
| * </processor></pre> |
| * @since 4.0.0 |
| */ |
| public final class ConcatFieldUpdateProcessorFactory extends FieldMutatingUpdateProcessorFactory { |
| |
| String delimiter = ", "; |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void init(@SuppressWarnings({"rawtypes"})NamedList args) { |
| Object d = args.remove("delimiter"); |
| if (null != d) delimiter = d.toString(); |
| |
| super.init(args); |
| } |
| |
| @Override |
| public UpdateRequestProcessor getInstance(SolrQueryRequest req, |
| SolrQueryResponse rsp, |
| UpdateRequestProcessor next) { |
| return mutator(getSelector(), next, src -> { |
| if (src.getValueCount() <= 1) return src; |
| |
| SolrInputField result = new SolrInputField(src.getName()); |
| result.setValue(StringUtils.join(src.getValues(), delimiter)); |
| return result; |
| }); |
| } |
| |
| @Override |
| public FieldMutatingUpdateProcessor.FieldNameSelector |
| getDefaultSelector(final SolrCore core) { |
| |
| return fieldName -> { |
| final IndexSchema schema = core.getLatestSchema(); |
| |
| // first check type since it should be fastest |
| FieldType type = schema.getFieldTypeNoEx(fieldName); |
| if (null == type) return false; |
| |
| if (! (TextField.class.isInstance(type) |
| || StrField.class.isInstance(type))) { |
| return false; |
| } |
| |
| // only ask for SchemaField if we passed the type check. |
| SchemaField sf = schema.getFieldOrNull(fieldName); |
| // shouldn't be null since since type wasn't, but just in case |
| if (null == sf) return false; |
| |
| return ! sf.multiValued(); |
| }; |
| } |
| |
| } |
| |