1 ////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code for adherence to a set of rules.
3 // Copyright (C) 2001-2015 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 package com.puppycrawl.tools.checkstyle.api;
20
21 import com.google.common.collect.ImmutableCollection;
22
23 /**
24 * A context to be used in subcomponents. The general idea of
25 * Context/Contextualizable was taken from <a target="_top"
26 * href="http://jakarta.apache.org/avalon/">Jakarta's Avalon framework</a>.
27 * @author lkuehne
28 * @see Contextualizable
29 */
30 public interface Context
31 {
32 /**
33 * Searches for the value with the specified attribute key in this context.
34 * @param key the attribute key.
35 * @return the value in this context with the specified attribute key value.
36 */
37 Object get(String key);
38
39 /**
40 * Returns the names of all atttributes of this context.
41 * @return the names of all atttributes of this context.
42 */
43 ImmutableCollection<String> getAttributeNames();
44 }