| /* |
| * 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.cassandra.config; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import com.fasterxml.jackson.annotation.JsonIgnore; |
| import org.yaml.snakeyaml.error.YAMLException; |
| import org.yaml.snakeyaml.introspector.BeanAccess; |
| import org.yaml.snakeyaml.introspector.Property; |
| import org.yaml.snakeyaml.introspector.PropertyUtils; |
| |
| import static org.apache.cassandra.utils.FBUtilities.camelToSnake; |
| |
| public final class SnakeYamlLoader implements Loader |
| { |
| private final Helper helper = new Helper(); |
| |
| @Override |
| public Map<String, Property> getProperties(Class<?> root) |
| { |
| return helper.getPropertiesMap(root, BeanAccess.DEFAULT); |
| } |
| |
| private static class Helper extends PropertyUtils |
| { |
| @Override |
| public Map<String, Property> getPropertiesMap(Class<?> type, BeanAccess bAccess) |
| { |
| Map<String, Property> map; |
| try |
| { |
| map = super.getPropertiesMap(type, bAccess); |
| } |
| catch (YAMLException e) |
| { |
| // some classes take a string in constructor and output as toString, these should be treated like |
| // primitive types |
| if (e.getMessage() != null && e.getMessage().startsWith("No JavaBean properties found")) |
| return Collections.emptyMap(); |
| throw e; |
| } |
| // filter out ignores |
| Set<String> ignore = new HashSet<>(); |
| Map<String, String> rename = new HashMap<>(); |
| map.values().forEach(p -> { |
| if (shouldIgnore(p)) |
| { |
| ignore.add(p.getName()); |
| return; |
| } |
| String snake = camelToSnake(p.getName()); |
| if (!p.getName().equals(snake)) |
| { |
| if (map.containsKey(snake)) |
| ignore.add(p.getName()); |
| else |
| rename.put(p.getName(), snake); |
| } |
| }); |
| ignore.forEach(map::remove); |
| rename.forEach((previous, desired) -> map.put(desired, map.remove(previous))); |
| return map; |
| } |
| |
| private static boolean shouldIgnore(Property p) |
| { |
| return !p.isWritable() || p.getAnnotation(JsonIgnore.class) != null; |
| } |
| } |
| } |