BuilderMapEntryCollection.java revision 42627b850c8f68a594f105e04b97c512b292b698 
1/*
2 * Copyright 2013, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.writer.builder;
33
34import javax.annotation.Nonnull;
35import java.util.AbstractCollection;
36import java.util.Collection;
37import java.util.Iterator;
38import java.util.Map;
39
40public abstract class BuilderMapEntryCollection<Key> extends AbstractCollection<Map.Entry<Key, Integer>> {
41    @Nonnull private final Collection<Key> keys;
42
43    public BuilderMapEntryCollection(@Nonnull Collection<Key> keys) {
44        this.keys = keys;
45    }
46
47    private class MapEntry implements Map.Entry<Key, Integer> {
48        @Nonnull private Key key;
49
50        @Nonnull @Override public Key getKey() {
51            return key;
52        }
53
54        @Override public Integer getValue() {
55            return BuilderMapEntryCollection.this.getValue(key);
56        }
57
58        @Override public Integer setValue(Integer value) {
59            return BuilderMapEntryCollection.this.setValue(key, value);
60        }
61    }
62
63    @Nonnull @Override public Iterator<Map.Entry<Key, Integer>> iterator() {
64        final Iterator<Key> iter = keys.iterator();
65
66        return new Iterator<Map.Entry<Key, Integer>>() {
67            @Override public boolean hasNext() {
68                return iter.hasNext();
69            }
70
71            @Override public Map.Entry<Key, Integer> next() {
72                MapEntry entry = new MapEntry();
73                entry.key = iter.next();
74                return entry;
75            }
76
77            @Override public void remove() {
78                throw new UnsupportedOperationException();
79            }
80        };
81    }
82
83    @Override public int size() {
84        return keys.size();
85    }
86
87    protected abstract int getValue(@Nonnull Key key);
88    protected abstract int setValue(@Nonnull Key key, int value);
89}
90