content: /**
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * Licensed 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.alibaba.graphscope.groot.common.config;
  
  import com.alibaba.graphscope.proto.groot.ConfigPb;
  
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Map;
  import java.util.Properties;
  
  public class Configs {
  
      private final Properties properties;
  
      public Configs() {
          this.properties = new Properties();
      }
  
      public Configs(String configFile) throws IOException {
          this();
          try (InputStream is = new FileInputStream(configFile)) {
              this.properties.load(is);
          }
      }
  
      public Configs(Properties properties) {
          this.properties = properties;
      }
  
      public Configs(Map<String, String> configs) {
          this.properties = new Properties();
          if (configs != null && !configs.isEmpty()) {
              configs.forEach(this.properties::setProperty);
          }
      }
  
      /**
       * Get the value of the {@code name} property, {@code null} if no such property exists.
       *
       * @param name the property name.
       * @return property value, or null if no such property exists.
       */
      public String get(String name) {
          return this.properties.getProperty(name);
      }
  
      /**
       * Get the value of the {@code name} property. If no such property exists, then {@code defaultValue} is returned.
       *
       * @param name         property name.
       * @param defaultValue default value.
       * @return property value, or defaultValue if the property doesn't exist.
       */
      public String get(String name, String defaultValue) {
          return this.properties.getProperty(name, defaultValue);
      }
  
      public ConfigPb toProto() {
          ConfigPb.Builder builder = ConfigPb.newBuilder();
          for (Map.Entry<Object, Object> entry : this.properties.entrySet()) {
              builder.putConfigs(entry.getKey().toString(), entry.getValue().toString());
          }
          return builder.build();
      }
  
      @Override
      public String toString() {
          return properties.toString();
      }
  
      public Properties getInnerProperties() {
          return this.properties;
      }
  
      public static Builder newBuilder() {
          return new Builder();
      }
  
      public static Builder newBuilder(Configs fromConfigs) {
          return new Builder(fromConfigs);
      }
  
      public static Builder newBuilder(Properties properties) {
          return new Builder(properties);
      }
  
      public static class Builder {
  
          private Properties properties;
  
          private Builder() {
              this.properties = new Properties();
          }
  
          private Builder(Configs fromConfigs) {
              this.properties = new Properties();
              fromConfigs
                      .properties
                      .entrySet()
                      .forEach(e -> this.properties.put(e.getKey(), e.getValue()));
          }
  
          private Builder(Properties properties) {
              this();
              this.properties.putAll(properties);
          }
  
          public Builder put(String key, String val) {
              this.properties.put(key, val);
              return this;
          }
  
          public Configs build() {
              return new Configs(this.properties);
          }
      }
  }
  