| /* |
| * 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 java.io.IOException; |
| |
| import org.apache.solr.common.SolrException; |
| import static org.apache.solr.common.SolrException.ErrorCode.*; |
| import org.apache.solr.common.SolrInputDocument; |
| import org.apache.solr.common.util.NamedList; |
| import org.apache.solr.update.AddUpdateCommand; |
| |
| /** |
| * <p> |
| * Base class that can be extended by any |
| * <code>UpdateRequestProcessorFactory</code> designed to add a default value |
| * to the document in an <code>AddUpdateCommand</code> when that field is not |
| * already specified. |
| * </p> |
| * <p> |
| * This base class handles initialization of the <code>fieldName</code> init |
| * param, and provides an {@link AbstractDefaultValueUpdateProcessorFactory.DefaultValueUpdateProcessor} that Factory |
| * subclasses may choose to return from their <code>getInstance</code> |
| * implementation. |
| * </p> |
| * @since 4.0.0 |
| */ |
| public abstract class AbstractDefaultValueUpdateProcessorFactory |
| extends UpdateRequestProcessorFactory { |
| |
| protected String fieldName = null; |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void init(@SuppressWarnings({"rawtypes"})NamedList args) { |
| |
| Object obj = args.remove("fieldName"); |
| if (null == obj && null == fieldName) { |
| throw new SolrException |
| (SERVER_ERROR, "'fieldName' init param must be specified and non-null"); |
| } else { |
| fieldName = obj.toString(); |
| } |
| |
| if (0 < args.size()) { |
| throw new SolrException(SERVER_ERROR, |
| "Unexpected init param(s): '" + |
| args.getName(0) + "'"); |
| } |
| |
| super.init(args); |
| } |
| |
| /** |
| * A simple processor that adds the results of {@link #getDefaultValue} |
| * to any document which does not already have a value in |
| * <code>fieldName</code> |
| */ |
| static abstract class DefaultValueUpdateProcessor |
| extends UpdateRequestProcessor { |
| |
| final String fieldName; |
| |
| public DefaultValueUpdateProcessor(final String fieldName, |
| final UpdateRequestProcessor next) { |
| super(next); |
| this.fieldName = fieldName; |
| } |
| |
| @Override |
| public void processAdd(AddUpdateCommand cmd) throws IOException { |
| final SolrInputDocument doc = cmd.getSolrInputDocument(); |
| |
| if (! doc.containsKey(fieldName)) { |
| doc.addField(fieldName, getDefaultValue()); |
| } |
| |
| super.processAdd(cmd); |
| } |
| |
| public abstract Object getDefaultValue(); |
| } |
| } |
| |
| |
| |