1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "JniConstants.h"
18#include "toStringArray.h"
19
20#include <string>
21#include <vector>
22
23jobjectArray newStringArray(JNIEnv* env, size_t count) {
24    return env->NewObjectArray(count, JniConstants::stringClass, NULL);
25}
26
27struct VectorCounter {
28    const std::vector<std::string>& strings;
29    VectorCounter(const std::vector<std::string>& strings) : strings(strings) {}
30    size_t operator()() {
31        return strings.size();
32    }
33};
34struct VectorGetter {
35    const std::vector<std::string>& strings;
36    VectorGetter(const std::vector<std::string>& strings) : strings(strings) {}
37    const char* operator()(size_t i) {
38        return strings[i].c_str();
39    }
40};
41
42jobjectArray toStringArray(JNIEnv* env, const std::vector<std::string>& strings) {
43    VectorCounter counter(strings);
44    VectorGetter getter(strings);
45    return toStringArray<VectorCounter, VectorGetter>(env, &counter, &getter);
46}
47
48struct ArrayCounter {
49    const char* const* strings;
50    ArrayCounter(const char* const* strings) : strings(strings) {}
51    size_t operator()() {
52        size_t count = 0;
53        while (strings[count] != NULL) {
54            ++count;
55        }
56        return count;
57    }
58};
59
60struct ArrayGetter {
61    const char* const* strings;
62    ArrayGetter(const char* const* strings) : strings(strings) {}
63    const char* operator()(size_t i) {
64        return strings[i];
65    }
66};
67
68jobjectArray toStringArray(JNIEnv* env, const char* const* strings) {
69    ArrayCounter counter(strings);
70    ArrayGetter getter(strings);
71    return toStringArray(env, &counter, &getter);
72}
73