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 } 73
