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.dexbacked.util;
33
34import com.google.common.collect.ImmutableSet;
35import org.jf.dexlib2.base.BaseMethodParameter;
36import org.jf.dexlib2.iface.Annotation;
37import org.jf.dexlib2.iface.MethodParameter;
38
39import javax.annotation.Nonnull;
40import javax.annotation.Nullable;
41import java.util.Iterator;
42import java.util.List;
43import java.util.Set;
44
45public class ParameterIterator implements Iterator<MethodParameter> {
46    private final Iterator<? extends CharSequence> parameterTypes;
47    private final Iterator<? extends Set<? extends Annotation>> parameterAnnotations;
48    private final Iterator<String> parameterNames;
49
50    public ParameterIterator(@Nonnull List<? extends CharSequence> parameterTypes,
51                             @Nonnull List<? extends Set<? extends Annotation>> parameterAnnotations,
52                             @Nonnull Iterator<String> parameterNames) {
53        this.parameterTypes = parameterTypes.iterator();
54        this.parameterAnnotations = parameterAnnotations.iterator();
55        this.parameterNames = parameterNames;
56    }
57
58    @Override public boolean hasNext() {
59        return parameterTypes.hasNext();
60    }
61
62    @Override public MethodParameter next() {
63        @Nonnull final String type = parameterTypes.next().toString();
64        @Nonnull final Set<? extends Annotation> annotations;
65        @Nullable final String name;
66
67        if (parameterAnnotations.hasNext()) {
68            annotations = parameterAnnotations.next();
69        } else {
70            annotations = ImmutableSet.of();
71        }
72
73        if (parameterNames.hasNext()) {
74            name = parameterNames.next();
75        } else {
76            name = null;
77        }
78
79        return new BaseMethodParameter() {
80            @Nonnull @Override public Set<? extends Annotation> getAnnotations() { return annotations; }
81            @Nullable @Override public String getName() { return name; }
82            @Nonnull @Override public String getType() { return type; }
83        };
84    }
85
86    @Override public void remove() {
87        throw new UnsupportedOperationException();
88    }
89}
90