1/*
2 * Copyright 2014, 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.rewriter;
33
34import org.jf.dexlib2.base.reference.BaseTypeReference;
35import org.jf.dexlib2.iface.reference.TypeReference;
36
37import javax.annotation.Nonnull;
38import javax.annotation.Nullable;
39import java.util.*;
40
41public class RewriterUtils {
42    @Nullable
43    public static <T> T rewriteNullable(@Nonnull Rewriter<T> rewriter, @Nullable T value) {
44        return value==null?null:rewriter.rewrite(value);
45    }
46
47    public static <T> Set<T> rewriteSet(@Nonnull final Rewriter<T> rewriter,
48                                        @Nonnull final Set<? extends T> set) {
49        return new AbstractSet<T>() {
50            @Nonnull @Override public Iterator<T> iterator() {
51                final Iterator<? extends T> iterator = set.iterator();
52                return new Iterator<T>() {
53                    @Override public boolean hasNext() {
54                        return iterator.hasNext();
55                    }
56
57                    @Override public T next() {
58                        return rewriteNullable(rewriter, iterator.next());
59                    }
60
61                    @Override public void remove() {
62                        iterator.remove();
63                    }
64                };
65            }
66
67            @Override public int size() {
68                return set.size();
69            }
70        };
71    }
72
73    public static <T> List<T> rewriteList(@Nonnull final Rewriter<T> rewriter,
74                                        @Nonnull final List<? extends T> list) {
75        return new AbstractList<T>() {
76            @Override public T get(int i) {
77                return rewriteNullable(rewriter, list.get(i));
78            }
79
80            @Override public int size() {
81                return list.size();
82            }
83        };
84    }
85
86    public static <T> Iterable<T> rewriteIterable(@Nonnull final Rewriter<T> rewriter,
87                                                  @Nonnull final Iterable<? extends T> iterable) {
88        return new Iterable<T>() {
89            @Override public Iterator<T> iterator() {
90                final Iterator<? extends T> iterator = iterable.iterator();
91                return new Iterator<T>() {
92                    @Override public boolean hasNext() {
93                        return iterator.hasNext();
94                    }
95
96                    @Override public T next() {
97                        return rewriteNullable(rewriter, iterator.next());
98                    }
99
100                    @Override public void remove() {
101                        iterator.remove();
102                    }
103                };
104            }
105        };
106    }
107
108    public static TypeReference rewriteTypeReference(@Nonnull final Rewriter<String> typeRewriter,
109                                                     @Nonnull final TypeReference typeReference) {
110        return new BaseTypeReference() {
111            @Nonnull @Override public String getType() {
112                return typeRewriter.rewrite(typeReference.getType());
113            }
114        };
115    }
116}
117
118
119