wpi::java Namespace Reference

Java Native Interface (JNI) utility functions. More...

Namespaces
namespace	detail

Classes
class	JCallbackManager
class	JCallbackThread
	Generic callback thread implementation. More...
class	JClass
	Finds a class and keeps it as a global reference. More...
struct	JClassInit
class	JException
	Finds an exception class and keep it as a global reference. More...
struct	JExceptionInit
class	JGlobal
class	JLocal
	Container class for cleaning up Java local references. More...
class	JSingletonCallbackManager
class	JStringRef
	Java string (jstring) reference. More...

Typedefs
template<typename T , size_t Extent = std::dynamic_extent>
using	JSpan = detail::JSpanBase< T, false, Extent >
template<typename T , size_t Extent = std::dynamic_extent>
using	CriticalJSpan = detail::JSpanBase< T, true, Extent >

Functions
std::string	GetJavaStackTrace (JNIEnv *env, std::string *func=nullptr, std::string_view excludeFuncPrefix={})
	Gets a Java stack trace. More...
jstring	MakeJString (JNIEnv *env, std::string_view str)
	Convert a UTF8 string into a jstring. More...
template<typename T >
jintArray	MakeJIntArray (JNIEnv *env, std::span< const T > arr)
	Convert a span to a jintArray. More...
template<typename T >
jintArray	MakeJIntArray (JNIEnv *env, const SmallVectorImpl< T > &arr)
	Convert a SmallVector to a jintArray. More...
template<typename T >
jintArray	MakeJIntArray (JNIEnv *env, const std::vector< T > &arr)
	Convert a std::vector to a jintArray. More...
jbyteArray	MakeJByteArray (JNIEnv *env, std::span< const uint8_t > str)
	Convert a span into a jbyteArray. More...
jbooleanArray	MakeJBooleanArray (JNIEnv *env, std::span< const int > arr)
	Convert an array of integers into a jbooleanArray. More...
jbooleanArray	MakeJBooleanArray (JNIEnv *env, std::span< const bool > arr)
	Convert an array of booleans into a jbooleanArray. More...
template<class T > requires (sizeof(typename T::value_type) == sizeof(jlong) && std::integral<typename T::value_type>)
jlongArray	MakeJLongArray (JNIEnv *env, const T &arr)
jobjectArray	MakeJStringArray (JNIEnv *env, std::span< const std::string > arr)
	Convert an array of std::string into a jarray of jstring. More...
jobjectArray	MakeJStringArray (JNIEnv *env, std::span< std::string_view > arr)
	Convert an array of std::string into a jarray of jstring. More...
std::string	GetJavaStackTrace (JNIEnv *env, std::string_view skipPrefix)

Detailed Description

Java Native Interface (JNI) utility functions.

Typedef Documentation

CriticalJSpan

template<typename T , size_t Extent = std::dynamic_extent>

using wpi::java::CriticalJSpan = typedef detail::JSpanBase<T, true, Extent>

JSpan

template<typename T , size_t Extent = std::dynamic_extent>

using wpi::java::JSpan = typedef detail::JSpanBase<T, false, Extent>

Function Documentation

GetJavaStackTrace() [1/2]

std::string wpi::java::GetJavaStackTrace ( JNIEnv *  env, std::string *  func = nullptr, std::string_view  excludeFuncPrefix = {}  )

inline

Gets a Java stack trace.

Also provides the last function in the stack trace not starting with excludeFuncPrefix (useful for e.g. finding the first user call to a series of library functions).

Parameters

env	JRE environment.
func	Storage for last function in the stack trace not starting with excludeFuncPrefix.
excludeFuncPrefix	Prefix for functions to ignore in stack trace.

GetJavaStackTrace() [2/2]

std::string wpi::java::GetJavaStackTrace ( JNIEnv *  env, std::string_view  skipPrefix  )

inline

MakeJBooleanArray() [1/2]

jbooleanArray wpi::java::MakeJBooleanArray ( JNIEnv *  env, std::span< const bool >  arr  )

inline

Convert an array of booleans into a jbooleanArray.

Parameters

env	JRE environment.
arr	Array to convert.

MakeJBooleanArray() [2/2]

jbooleanArray wpi::java::MakeJBooleanArray ( JNIEnv *  env, std::span< const int >  arr  )

inline

Convert an array of integers into a jbooleanArray.

Parameters

env	JRE environment.
arr	Array to convert.

MakeJByteArray()

jbyteArray wpi::java::MakeJByteArray ( JNIEnv *  env, std::span< const uint8_t >  str  )

inline

Convert a span into a jbyteArray.

Parameters

env	JRE environment.
str	span to convert.

MakeJIntArray() [1/3]

template<typename T >

jintArray wpi::java::MakeJIntArray ( JNIEnv *  env, const SmallVectorImpl< T > &  arr  )

inline

Convert a SmallVector to a jintArray.

This is required in addition to ArrayRef because template resolution occurs prior to implicit conversions.

Parameters

env	JRE environment.
arr	SmallVector to convert.

MakeJIntArray() [2/3]

template<typename T >

jintArray wpi::java::MakeJIntArray ( JNIEnv *  env, const std::vector< T > &  arr  )

inline

Convert a std::vector to a jintArray.

This is required in addition to ArrayRef because template resolution occurs prior to implicit conversions.

Parameters

env	JRE environment.
arr	SmallVector to convert.

MakeJIntArray() [3/3]

template<typename T >

jintArray wpi::java::MakeJIntArray ( JNIEnv *  env, std::span< const T >  arr  )

inline

Convert a span to a jintArray.

Parameters

env	JRE environment.
arr	Span to convert.

MakeJLongArray()

template<class T >
requires (sizeof(typename T::value_type) == sizeof(jlong) && std::integral<typename T::value_type>)

jlongArray wpi::java::MakeJLongArray ( JNIEnv *  env, const T &  arr  )

inline

MakeJString()

jstring wpi::java::MakeJString ( JNIEnv *  env, std::string_view  str  )

inline

Convert a UTF8 string into a jstring.

Parameters

env	JRE environment.
str	String to convert.

MakeJStringArray() [1/2]

jobjectArray wpi::java::MakeJStringArray ( JNIEnv *  env, std::span< const std::string >  arr  )

inline

Convert an array of std::string into a jarray of jstring.

Parameters

env	JRE environment.
arr	Array to convert.

MakeJStringArray() [2/2]

jobjectArray wpi::java::MakeJStringArray ( JNIEnv *  env, std::span< std::string_view >  arr  )

inline

Convert an array of std::string into a jarray of jstring.

Parameters

env	JRE environment.
arr	Array to convert.