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
newStringArray(JNIEnv * env,size_t count)23 jobjectArray newStringArray(JNIEnv* env, size_t count) {
24 return env->NewObjectArray(count, JniConstants::stringClass, NULL);
25 }
26
27 struct VectorCounter {
28 const std::vector<std::string>& strings;
VectorCounterVectorCounter29 VectorCounter(const std::vector<std::string>& strings) : strings(strings) {}
operator ()VectorCounter30 size_t operator()() {
31 return strings.size();
32 }
33 };
34 struct VectorGetter {
35 const std::vector<std::string>& strings;
VectorGetterVectorGetter36 VectorGetter(const std::vector<std::string>& strings) : strings(strings) {}
operator ()VectorGetter37 const char* operator()(size_t i) {
38 return strings[i].c_str();
39 }
40 };
41
toStringArray(JNIEnv * env,const std::vector<std::string> & strings)42 jobjectArray 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
48 struct ArrayCounter {
49 const char* const* strings;
ArrayCounterArrayCounter50 ArrayCounter(const char* const* strings) : strings(strings) {}
operator ()ArrayCounter51 size_t operator()() {
52 size_t count = 0;
53 while (strings[count] != NULL) {
54 ++count;
55 }
56 return count;
57 }
58 };
59
60 struct ArrayGetter {
61 const char* const* strings;
ArrayGetterArrayGetter62 ArrayGetter(const char* const* strings) : strings(strings) {}
operator ()ArrayGetter63 const char* operator()(size_t i) {
64 return strings[i];
65 }
66 };
67
toStringArray(JNIEnv * env,const char * const * strings)68 jobjectArray toStringArray(JNIEnv* env, const char* const* strings) {
69 ArrayCounter counter(strings);
70 ArrayGetter getter(strings);
71 return toStringArray(env, &counter, &getter);
72 }
73