1 | /**
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2 | * @file jni.cpp
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3 | * @author myusgun@gmail.com
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4 | * @brief JNI
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5 | */
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6 | #ifdef _USE_JNI
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7 | #include "cf/jni.h"
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8 | #include "cf/types.h"
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9 |
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10 | #include <stdio.h>
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11 | #include <stdarg.h>
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12 |
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13 | using namespace cf;
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14 |
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15 | #define USE_JNI_PRIMITIVE
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16 |
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17 | cf::void_t jni::releaseByteArray(jbyteArray jinput,
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18 | cf::char_t * in)
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19 | {
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20 | if(!jinput || !in)
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21 | return;
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22 |
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23 | #ifdef USE_JNI_PRIMITIVE
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24 | mJNIEnv->ReleasePrimitiveArrayCritical((jarray)jinput, (cf::void_t *)in, JNI_ABORT);
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25 | #else
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26 | mJNIEnv->ReleaseByteArrayElements(jinput, (jbyte *)in, JNI_ABORT);
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27 | #endif
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28 | }
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29 |
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30 | cf::void_t jni::releaseString(jstring jinput,
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31 | cf::char_t * in)
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32 | {
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33 | if(!jinput || !in)
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34 | return;
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35 |
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36 | mJNIEnv->ReleaseStringUTFChars(jinput, in);
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37 | }
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38 |
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39 | cf::void_t jni::releaseLocalMemory(jobject in)
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40 | {
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41 | /* collected by GC */
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42 | #if 0
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43 | mJNIEnv->DeleteLocalRef(in);
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44 | #endif
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45 | }
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46 |
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47 | bin jni::getByteArray(jbyteArray jinput)
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48 | throw (exception)
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49 | {
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50 | jboolean isCopy;
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51 | bin out;
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52 |
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53 | cf::char_t * buf = NULL;
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54 | cf::int32_t len = 0;
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55 |
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56 | if(!jinput)
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57 | THROW_EXCEPTION("input from java is null");
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58 |
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59 | #ifdef USE_JNI_PRIMITIVE
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60 | /**
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61 | * NOTE
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62 | * read-only
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63 | */
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64 | isCopy = JNI_FALSE;
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65 | buf = (cf::char_t *)mJNIEnv->GetPrimitiveArrayCritical((jarray)jinput, &isCopy);
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66 | if(!buf)
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67 | THROW_EXCEPTION("failed to GetPrimitiveArrayCritical");
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68 | #else
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69 | buf = (cf::char_t *)mJNIEnv->GetByteArrayElements(jinput, &isCopy);
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70 | #endif
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71 | len = (cf::int32_t)mJNIEnv->GetArrayLength(jinput);
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72 |
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73 | out.copy((cf::uint8_t *)buf, len);
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74 |
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75 | releaseByteArray(jinput, buf);
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76 |
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77 | return out;
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78 | }
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79 |
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80 | std::string jni::getString(jstring jinput)
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81 | throw (exception)
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82 | {
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83 | if(!jinput)
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84 | THROW_EXCEPTION("input from java is null");
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85 |
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86 | jboolean isCopy;
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87 | cf::char_t * buf = (cf::char_t *)mJNIEnv->GetStringUTFChars(jinput, &isCopy);
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88 | std::string out = buf;
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89 |
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90 | releaseString(jinput, buf);
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91 |
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92 | return out;
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93 | }
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94 |
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95 | cf::void_t jni::throwException(const cf::char_t * message)
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96 | {
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97 | jthrowable occurred = mJNIEnv->ExceptionOccurred();
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98 | if(occurred)
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99 | mJNIEnv->Throw(occurred);
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100 |
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101 | jclass exClass = mJNIEnv->FindClass("java/lang/Exception");
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102 |
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103 | mJNIEnv->ThrowNew(exClass, message);
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104 | }
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105 |
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106 | jbyteArray jni::newByteArray(const bin & in)
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107 | {
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108 | jbyteArray out = NULL;
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109 |
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110 | out = mJNIEnv->NewByteArray((jsize)in.length());
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111 | if(!out)
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112 | return NULL;
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113 |
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114 | mJNIEnv->SetByteArrayRegion(out, 0, (jsize)in.length(), (jbyte *)in.value());
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115 |
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116 | return out;
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117 | }
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118 |
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119 | jstring jni::newString(const std::string & in)
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120 | {
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121 | return mJNIEnv->NewStringUTF(in.c_str());
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122 | }
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123 |
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124 | #endif // #ifdef _USE_JNI
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