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com.jniwrapper
package contains classes that allow calling native functions from Java(TM) code.
See:
Description
Interface Summary | |
---|---|
AlignmentAwareParameter | Internal interface, required for alignment calculation |
ArrayParameter | Common interface for all types representing arrays. |
AutoDeleteParameter | This class represents resource that could be deleted automatically or manually. |
CompositeParameter | Marker interface that identifies type that should be marshalled as a set of bytes (Structure and Union are typical usages) |
DataBuffer | Basic interface to any memory location where JNIWrapper types can store their data. |
FloatParameter | Common interface for all floating-point types. |
IntegerParameter | Common interface for all integer types. |
IOPerformer | Parameter I/O visitor interface. |
LibraryLoader | Basic interface for classes that can find and load a native library. |
MemoryBuffer | Data source associated with an allocated native memory block. |
NativeResource | Interface for releasing native resources. |
PointerParameter | Marker interface that identifies pointer parameter. |
StringParameter | This is a generic interface for all parameters holding a string value. |
Class Summary | |
---|---|
AbstractBuffer | |
AbstractFloat | Base class for all floating-point types. |
AnsiString | Represents a zero-terminated string of an 8-bit (ANSI) character declared in
C as char[n] , where n is the length of the buffer. |
AnsiStringArray | This type is specially designed for reading/writing double zero terminated (Ansi) string arrays. |
ArithmeticalPointer | Pointer to a place within an allocated structure that handles reading and writing of offset pointer values. |
BitField | Represents a bit field for structures. |
Bool | Represents a bool (boolean) value and type. |
ByteArrayBufferBE | |
Callback | Callback is a superclass for all classes representing callback functions. |
Char | Represents the char value and type. |
CharacterEncoding | Enumeration of supported characters encodings. |
ComplexArray | Represents an array of objects. |
Const | Represents a read-only parameter. |
DataBufferFactory | Abstract base for factory classes that produce instances of appropriate
DataBuffer implementation. |
DefaultLibraryLoader | Default implementation for LibraryLoader that realizes Singleton
pattern. |
DelegatingParameter | Base class for all parameter types that wrap around other types. |
DoubleFloat | Represents double float value and type. |
ExternalArrayPointer | A pointer to an array returned from the native code. |
ExternalStringArray | This class allows reading external memory block that contains a sequence of null-terminated strings. |
ExternalStringPointer | This class is designed for reading externally allocated strings. |
Function | The Function class allows to call a specified function
from a native code library. |
FunctionCall | This is a helper class for improving performance of a function invocation. |
Int | C-like int value. |
Int16 | Represents a 16-bit integer value and type. |
Int32 | Represents a 32-bit integer value and type. |
Int64 | Represents a 64-bit integer value and type. |
Int8 | Represents an 8-bit integer (byte) value and type. |
IntBool | This class represents four bytes boolean type. |
JNIWrapperInfo | This class provides information about configuration of JNIWrapper. |
Library | This class provides operations with a native code library. |
LongDouble | Represents long double value and type. |
LongInt | C-like long value. |
NativeResourceCollector | Garbage collection assistant for native resources. |
NullBuffer | |
OutOnly | Represents a parameter that is only written by a native function. |
Parameter | Common parent class for all types of function parameters. |
ParameterBufferImpl | |
ParameterHelperMacOsIntel64 | |
ParameterHelperSunOSSparc64 | |
PlatformContext | Provides information on platform-dependent type sizes, etc. |
Pointer | This class represents a pointer to object in terms of C language. |
Pointer.Const | Represents a pointer to constant object. |
Pointer.OutOnly | Represents a pointer to object with undefined initial value. |
Pointer.Void | Represents a void * . |
PrimitiveArray | Represents an array of primitive types such as array of bytes or array of integer values. |
ResizingPointer | A pointer to an array that can be resized (reallocated) on the native side. |
ShortInt | C-like short value. |
SingleFloat | Represents the float value and type. |
Str | Represents a string data that depends on Unicode support of an operating system under which the code is being executed. |
StringArray | Represents a string array where strings are delimited by the zero character. |
Structure | The class represents structures in terms of C language. |
SunOSSparc64PlatformSupport | |
SunOSSparcPlatformSupport | |
UInt | C-like unsigned int value. |
UInt16 | Represents a 16-bit unsigned integer value and type. |
UInt32 | Represents a 32-bit unsigned integer value and type. |
UInt64 | Represents 64-bit unsigned integer type specially designed to support UINT64 native type. |
UInt8 | Represents an 8-bit unsigned integer value and type. |
ULongInt | C-like unsigned long value. |
UnicodeChar | Represents a Unicode character (wchar_t ) for Unix platform. |
UnicodeString | Represents a Unicode string (wchar_t * ) for Unix platform. |
Union | Represents a C union type. |
Unused | Represents a parameter which is not accessed in a native function. |
UShortInt | C-like unsigned short value. |
WideChar | Represents a Unicode character (wchar_t ) |
WideString | Represents Unicode string (wchar_t[n] ) value and type, where n is the length of the buffer.. |
WideStringArray | This type is specially designed for reading/writing double zero terminated (Unicode) string arrays. |
ZeroTerminatedString | Base class for all types of zero-terminated strings. |
Exception Summary | |
---|---|
FunctionExecutionException | This exception is thrown if an error occurs during a native function call. |
JNIWrapperException | Is made for compatibility with JDK 1.3.x |
LibraryNotFoundException | This exception is thrown when a native library cannot be loaded. |
LibraryVersionMismatchException | This exception is thrown when there is a native library but it is not compatible with
the current JNIWrapper version. |
MemoryAccessViolationException | This exception is thrown when a native library code attempts to reference an invalid memory location. |
NoSuchFunctionException | Indicates that a requested native function was not found in the specified library. |
NoSuchVariableException | Indicates that a requested native function was not found in the specified library. |
The com.jniwrapper
package contains classes that allow calling native functions from Java(TM) code.
Calling native functions is quite simple if you follow these steps:
DefaultLibraryLoader
contains all your PATH
entries and
gives you ability to add your own:
DefaultLibraryLoader.getInstance().addPath(new File("path/to/my/code"));As the name suggests this class is used by default to load native libraries.
LongInt retVal = new LongInt(0); WideString str = new WideString(256); UInt32 len = new UInt32(256);
Library kernel = new Library("kernel32"); kernel.getFunction("GetCurrentDirectoryW", null).invoke(retVal, len, new Pointer.OutOnly(str));
System.out.println("Current working directory is: " + str.getValue());
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