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1   ///////////////////////////////////////////////////////////////////////////////////////////////
2   // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
3   // Copyright (C) 2001-2024 the original author or authors.
4   //
5   // This library is free software; you can redistribute it and/or
6   // modify it under the terms of the GNU Lesser General Public
7   // License as published by the Free Software Foundation; either
8   // version 2.1 of the License, or (at your option) any later version.
9   //
10  // This library is distributed in the hope that it will be useful,
11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  // Lesser General Public License for more details.
14  //
15  // You should have received a copy of the GNU Lesser General Public
16  // License along with this library; if not, write to the Free Software
17  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18  ///////////////////////////////////////////////////////////////////////////////////////////////
19  
20  package com.puppycrawl.tools.checkstyle;
21  
22  import java.util.Collection;
23  import java.util.HashMap;
24  import java.util.HashSet;
25  import java.util.Map;
26  
27  import com.puppycrawl.tools.checkstyle.api.Context;
28  
29  /**
30   * A default implementation of the Context interface.
31   */
32  public final class DefaultContext implements Context {
33  
34      /** Stores the context entries. */
35      private final Map<String, Object> entries = new HashMap<>();
36  
37      @Override
38      public Object get(String key) {
39          return entries.get(key);
40      }
41  
42      @Override
43      public Collection<String> getAttributeNames() {
44          return new HashSet<>(entries.keySet());
45      }
46  
47      /**
48       * Adds a context entry.
49       *
50       * @param key the context key
51       * @param value the value for key
52       */
53      public void add(String key, Object value) {
54          entries.put(key, value);
55      }
56  
57  }