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/hudson-core/src/main/java/hudson/util/xstream/ImmutableMapConverter.java

http://github.com/hudson/hudson
Java | 70 lines | 34 code | 8 blank | 28 comment | 0 complexity | 7e44af88438cfa1307c7214889b4093b MD5 | raw file
 1/*
 2 * The MIT License
 3 *
 4 * Copyright (c) 2010, InfraDNA, Inc.
 5 *
 6 * Permission is hereby granted, free of charge, to any person obtaining a copy
 7 * of this software and associated documentation files (the "Software"), to deal
 8 * in the Software without restriction, including without limitation the rights
 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24package hudson.util.xstream;
25
26import com.google.common.collect.ImmutableMap;
27import com.thoughtworks.xstream.XStream;
28import com.thoughtworks.xstream.converters.UnmarshallingContext;
29import com.thoughtworks.xstream.converters.collections.MapConverter;
30import com.thoughtworks.xstream.converters.reflection.ReflectionProvider;
31import com.thoughtworks.xstream.converters.reflection.SerializableConverter;
32import com.thoughtworks.xstream.io.HierarchicalStreamReader;
33import com.thoughtworks.xstream.mapper.Mapper;
34
35import java.util.HashMap;
36import java.util.Map;
37import java.util.concurrent.ConcurrentHashMap;
38
39/**
40 * {@link ConcurrentHashMap} should convert like a map, instead of via serialization.
41 *
42 * @author Kohsuke Kawaguchi
43 */
44public class ImmutableMapConverter extends MapConverter {
45    private final SerializableConverter sc;
46
47    public ImmutableMapConverter(XStream xs) {
48        this(xs.getMapper(),xs.getReflectionProvider());
49    }
50
51    public ImmutableMapConverter(Mapper mapper, ReflectionProvider reflectionProvider) {
52        super(mapper);
53        sc = new SerializableConverter(mapper,reflectionProvider);
54    }
55
56    @Override
57    public boolean canConvert(Class type) {
58        return ImmutableMap.class.isAssignableFrom(type);
59    }
60
61    @Override
62    public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
63        return ImmutableMap.copyOf((Map)super.unmarshal(reader, context));
64    }
65
66    @Override
67    protected Object createCollection(Class type) {
68        return new HashMap();
69    }
70}