| /* |
| * 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.geode.cache.lucene.internal.repository.serializer; |
| |
| import java.lang.reflect.Field; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.apache.logging.log4j.Logger; |
| import org.apache.lucene.document.Document; |
| |
| import org.apache.geode.cache.lucene.LuceneIndex; |
| import org.apache.geode.cache.lucene.LuceneSerializer; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| |
| /** |
| * A lucene serializer that handles a single class and can map an instance of that class to a |
| * document using reflection. |
| */ |
| class ReflectionLuceneSerializer implements LuceneSerializer { |
| |
| private Field[] fields; |
| |
| private static final Logger logger = LogService.getLogger(); |
| |
| public ReflectionLuceneSerializer(Class<? extends Object> clazz, String[] indexedFields) { |
| Set<String> fieldSet = new HashSet<String>(); |
| fieldSet.addAll(Arrays.asList(indexedFields)); |
| |
| // Iterate through all declared fields and save them |
| // in a list if they are an indexed field and have the correct |
| // type. |
| ArrayList<Field> foundFields = new ArrayList<Field>(); |
| while (clazz != Object.class) { |
| for (Field field : clazz.getDeclaredFields()) { |
| Class<?> type = field.getType(); |
| if (fieldSet.contains(field.getName()) && SerializerUtil.isSupported(type)) { |
| field.setAccessible(true); |
| foundFields.add(field); |
| } |
| } |
| |
| clazz = clazz.getSuperclass(); |
| } |
| |
| this.fields = foundFields.toArray(new Field[foundFields.size()]); |
| } |
| |
| @Override |
| public Collection<Document> toDocuments(LuceneIndex index, Object value) { |
| Document doc = new Document(); |
| for (Field field : fields) { |
| try { |
| Object fieldValue = field.get(value); |
| if (fieldValue == null) { |
| continue; |
| } |
| SerializerUtil.addField(doc, field.getName(), fieldValue); |
| } catch (IllegalArgumentException | IllegalAccessException e) { |
| // TODO - what to do if we can't read a field? |
| } |
| } |
| if (logger.isDebugEnabled()) { |
| logger.debug("ReflectionLuceneSerializer.toDocument:" + doc); |
| } |
| return Collections.singleton(doc); |
| } |
| } |