| /* |
| * 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.skywalking.oap.server.core.storage.type; |
| |
| import java.util.Base64; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import lombok.RequiredArgsConstructor; |
| import org.apache.skywalking.oap.server.core.Const; |
| import org.apache.skywalking.oap.server.library.util.CollectionUtils; |
| import org.apache.skywalking.oap.server.library.util.StringUtil; |
| |
| /** |
| * HashMapConverter represents a HashMap based converter to hold the value. |
| * |
| * This converter includes following converting rules. |
| * 1. byte[] is converted to/from String through BASE64 encoder/decoder. |
| */ |
| public class HashMapConverter { |
| /** |
| * Stateful Hashmap based converter, build object from a HashMap type source. |
| */ |
| @RequiredArgsConstructor |
| public static class ToEntity implements Convert2Entity { |
| private final Map<String, Object> source; |
| |
| @Override |
| public Object get(final String fieldName) { |
| return source.get(fieldName); |
| } |
| |
| @Override |
| public byte[] getBytes(final String fieldName) { |
| final String value = (String) source.get(fieldName); |
| if (StringUtil.isEmpty(value)) { |
| return new byte[] {}; |
| } |
| return Base64.getDecoder().decode(value); |
| } |
| } |
| |
| /** |
| * Stateful Hashmap based converter, from object to HashMap. |
| */ |
| public static class ToStorage implements Convert2Storage<Map<String, Object>> { |
| private Map<String, Object> source; |
| |
| public ToStorage() { |
| source = new HashMap(); |
| } |
| |
| @Override |
| public void accept(final String fieldName, final Object fieldValue) { |
| source.put(fieldName, fieldValue); |
| } |
| |
| @Override |
| public void accept(final String fieldName, final byte[] fieldValue) { |
| if (CollectionUtils.isEmpty(fieldValue)) { |
| source.put(fieldName, Const.EMPTY_STRING); |
| } else { |
| source.put(fieldName, new String(Base64.getEncoder().encode(fieldValue))); |
| } |
| } |
| |
| @Override |
| public void accept(final String fieldName, final List<String> fieldValue) { |
| this.accept(fieldName, (Object) fieldValue); |
| } |
| |
| @Override |
| public Object get(final String fieldName) { |
| return source.get(fieldName); |
| } |
| |
| @Override |
| public Map<String, Object> obtain() { |
| return source; |
| } |
| } |
| } |