Brian Carlstrom | dd8af23 | 2012-05-13 23:56:07 -0700 | [diff] [blame] | 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 | |
| 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; |
| 29 | VectorCounter(const std::vector<std::string>& strings) : strings(strings) {} |
| 30 | size_t operator()() { |
| 31 | return strings.size(); |
| 32 | } |
| 33 | }; |
| 34 | struct 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 | |
| 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; |
| 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 | |
| 60 | struct 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 | |
| 68 | jobjectArray toStringArray(JNIEnv* env, const char* const* strings) { |
| 69 | ArrayCounter counter(strings); |
| 70 | ArrayGetter getter(strings); |
| 71 | return toStringArray(env, &counter, &getter); |
| 72 | } |