StringPool.java revision 9a2de93a998958e582e9c2aa0bff7de602cc8771 
1/*
2 * Copyright 2012, 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.pool;
33
34import org.jf.dexlib2.iface.reference.StringReference;
35import org.jf.dexlib2.writer.StringSection;
36import org.jf.util.ExceptionWithContext;
37
38import javax.annotation.Nonnull;
39import javax.annotation.Nullable;
40
41public class StringPool extends StringTypeBasePool implements StringSection<CharSequence, StringReference> {
42    public void intern(@Nonnull CharSequence string) {
43        internedItems.put(string.toString(), 0);
44    }
45
46    public void internNullable(@Nullable CharSequence string) {
47        if (string != null) {
48            intern(string);
49        }
50    }
51
52    @Override public int getItemIndex(@Nonnull StringReference key) {
53        Integer index = internedItems.get(key.toString());
54        if (index == null) {
55            throw new ExceptionWithContext("Item not found.: %s", key.toString());
56        }
57        return index;
58    }
59
60    @Override public boolean hasJumboIndexes() {
61        return internedItems.size() > 65536;
62    }
63}
64