Line data    Source code

       1             : // Copyright (C) 2021 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.entities;
      16             : 
      17             : import java.util.Set;
      18             : import org.eclipse.jgit.errors.ConfigInvalidException;
      19             : import org.eclipse.jgit.lib.Config;
      20             : 
      21             : /**
      22             :  * Immutable parsed representation of a {@link org.eclipse.jgit.lib.Config} that can be cached.
      23             :  * Supports only a limited set of operations.
      24             :  */
      25             : public class ImmutableConfig {
      26           3 :   public static final ImmutableConfig EMPTY = new ImmutableConfig("", new Config());
      27             : 
      28             :   private final String stringCfg;
      29             :   private final Config cfg;
      30             : 
      31           3 :   private ImmutableConfig(String stringCfg, Config cfg) {
      32           3 :     this.stringCfg = stringCfg;
      33           3 :     this.cfg = cfg;
      34           3 :   }
      35             : 
      36             :   public static ImmutableConfig parse(String stringCfg) throws ConfigInvalidException {
      37           3 :     Config cfg = new Config();
      38           3 :     cfg.fromText(stringCfg);
      39           3 :     return new ImmutableConfig(stringCfg, cfg);
      40             :   }
      41             : 
      42             :   /** Returns a mutable copy of this config. */
      43             :   public Config mutableCopy() {
      44           1 :     Config cfg = new Config();
      45             :     try {
      46           1 :       cfg.fromText(this.cfg.toText());
      47           0 :     } catch (ConfigInvalidException e) {
      48             :       // Can't happen as we used JGit to format that config.
      49           0 :       throw new IllegalStateException(e);
      50           1 :     }
      51           1 :     return cfg;
      52             :   }
      53             : 
      54             :   /** See {@link Config#getSections()} */
      55             :   public Set<String> getSections() {
      56           1 :     return cfg.getSections();
      57             :   }
      58             : 
      59             :   /** See {@link Config#getNames(String)} */
      60             :   public Set<String> getNames(String section) {
      61           1 :     return cfg.getNames(section);
      62             :   }
      63             : 
      64             :   /** See {@link Config#getNames(String, String)} */
      65             :   public Set<String> getNames(String section, String subsection) {
      66           1 :     return cfg.getNames(section, subsection);
      67             :   }
      68             : 
      69             :   /** See {@link Config#getStringList(String, String, String)} */
      70             :   public String[] getStringList(String section, String subsection, String name) {
      71           1 :     return cfg.getStringList(section, subsection, name);
      72             :   }
      73             : 
      74             :   /** See {@link Config#getSubsections(String)} */
      75             :   public Set<String> getSubsections(String section) {
      76           1 :     return cfg.getSubsections(section);
      77             :   }
      78             : 
      79             :   @Override
      80             :   public boolean equals(Object o) {
      81           1 :     if (!(o instanceof ImmutableConfig)) {
      82           0 :       return false;
      83             :     }
      84           1 :     return ((ImmutableConfig) o).stringCfg.equals(stringCfg);
      85             :   }
      86             : 
      87             :   @Override
      88             :   public int hashCode() {
      89           0 :     return stringCfg.hashCode();
      90             :   }
      91             : }