001////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code for adherence to a set of rules.
003// Copyright (C) 2001-2014  Oliver Burn
004//
005// This library is free software; you can redistribute it and/or
006// modify it under the terms of the GNU Lesser General Public
007// License as published by the Free Software Foundation; either
008// version 2.1 of the License, or (at your option) any later version.
009//
010// This library is distributed in the hope that it will be useful,
011// but WITHOUT ANY WARRANTY; without even the implied warranty of
012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013// Lesser General Public License for more details.
014//
015// You should have received a copy of the GNU Lesser General Public
016// License along with this library; if not, write to the Free Software
017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
018////////////////////////////////////////////////////////////////////////////////
019package com.puppycrawl.tools.checkstyle;
020
021import com.google.common.collect.ImmutableList;
022
023import com.google.common.collect.ImmutableCollection;
024
025import com.google.common.collect.Maps;
026import com.puppycrawl.tools.checkstyle.api.Context;
027import java.util.Map;
028
029/**
030 * A default implementation of the Context interface.
031 * @author lkuehne
032 */
033public final class DefaultContext implements Context
034{
035    /** stores the context entries */
036    private final Map<String, Object> entries = Maps.newHashMap();
037
038    /** {@inheritDoc} */
039    @Override
040    public Object get(String key)
041    {
042        return entries.get(key);
043    }
044
045    /** {@inheritDoc} */
046    @Override
047    public ImmutableCollection<String> getAttributeNames()
048    {
049        return ImmutableList.copyOf(entries.keySet());
050    }
051
052    /**
053     * Adds a context entry.
054     * @param key the context key
055     * @param value the value for key
056     */
057    public void add(String key, Object value)
058    {
059        entries.put(key, value);
060    }
061}