| // 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. |
| |
| #include "kudu/util/yamlreader.h" |
| |
| #include <ostream> |
| #include <utility> |
| |
| #include <glog/logging.h> |
| // IWYU pragma: no_include <yaml-cpp/node/detail/impl.h> |
| // IWYU pragma: no_include <yaml-cpp/node/parse.h> |
| |
| #include "kudu/gutil/port.h" |
| #include "kudu/gutil/strings/substitute.h" |
| |
| using std::string; |
| using strings::Substitute; |
| using YAML::Node; |
| using YAML::NodeType; |
| |
| namespace kudu { |
| |
| YamlReader::YamlReader(string filename) : filename_(std::move(filename)) {} |
| |
| Status YamlReader::Init() { |
| try { |
| node_ = YAML::LoadFile(filename_); |
| } catch (std::exception& e) { |
| return Status::Corruption(Substitute("YAML::LoadFile error: $0", e.what())); |
| } |
| |
| return Status::OK(); |
| } |
| |
| Status YamlReader::ExtractMap(const Node* node, |
| const string& field, |
| Node* result) { |
| CHECK(result); |
| Node val; |
| RETURN_NOT_OK(ExtractField(node, field, &val)); |
| if (PREDICT_FALSE(!val.IsMap())) { |
| return Status::Corruption(Substitute( |
| "wrong type during field extraction: expected map but got $0", |
| TypeToString(val.Type()))); |
| } |
| *result = val; |
| return Status::OK(); |
| } |
| |
| Status YamlReader::ExtractField(const Node* node, |
| const string& field, |
| Node* result) { |
| if (PREDICT_FALSE(!node->IsDefined() || !node->IsMap())) { |
| return Status::Corruption("node is not map type"); |
| } |
| try { |
| *result = (*node)[field]; |
| } catch (std::exception& e) { |
| return Status::NotFound(Substitute("parse field $0 error: $1", field, e.what())); |
| } |
| if (PREDICT_FALSE(!result->IsDefined())) { |
| return Status::Corruption("Missing field", field); |
| } |
| |
| return Status::OK(); |
| } |
| |
| const char* YamlReader::TypeToString(NodeType::value t) { |
| switch (t) { |
| case NodeType::Undefined: |
| return "undefined"; |
| case NodeType::Null: |
| return "null"; |
| case NodeType::Scalar: |
| return "scalar"; |
| case NodeType::Sequence: |
| return "sequence"; |
| case NodeType::Map: |
| return "map"; |
| default: |
| LOG(FATAL) << "unexpected type: " << t; |
| } |
| return ""; |
| } |
| |
| } // namespace kudu |