| /* |
| * Copyright 2017 HugeGraph Authors |
| * |
| * 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 com.baidu.hugegraph.config; |
| |
| import java.lang.reflect.Field; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.slf4j.Logger; |
| |
| import com.baidu.hugegraph.util.Log; |
| |
| public class OptionHolder { |
| |
| private static final Logger LOG = Log.logger(HugeConfig.class); |
| |
| protected Map<String, TypedOption<?, ?>> options; |
| |
| public OptionHolder() { |
| this.options = new HashMap<>(); |
| } |
| |
| protected void registerOptions() { |
| for (Field field : this.getClass().getFields()) { |
| if (!TypedOption.class.isAssignableFrom(field.getType())) { |
| // Skip if not option |
| continue; |
| } |
| try { |
| TypedOption<?, ?> option = (TypedOption<?, ?>) field.get(this); |
| // Fields of subclass first, don't overwrite by superclass |
| this.options.putIfAbsent(option.name(), option); |
| } catch (Exception e) { |
| LOG.error("Failed to register option: {}", field, e); |
| throw new ConfigException( |
| "Failed to register option: %s", field); |
| } |
| } |
| } |
| |
| public Map<String, TypedOption<?, ?>> options() { |
| return Collections.unmodifiableMap(this.options); |
| } |
| } |