JarCastingJava 4 C++ (java4cpp)
A utility for creating C++ wrapper classes for a Java Library(.jar file) or class file.
Build
To build one needs:
- JDK 1.8+ (http://www.oracle.com/technetwork/java/javase/downloads/index.html) and
- maven(https://maven.apache.org/download.cgi)
Use the command:
mvn package
OR
- An IDE bundled with both maven and a JDK such as Netbeans, IntelliJ, or Eclipse.
- Netbeans will open a maven project with File -> Open Project just like Netbeans generated Ant projects.
- IntelliJ and Eclipse both have options to import maven projects.
Run
Run directly with:
java -jar target/java4cpp-1.2-SNAPSHOT-jar-with-dependencies.jar
Possible options are:
-?,--help Print this message
-c,--class <arg> Single Java class to extract.
-h,--header <arg> Output C++ header file.
-j,--jar <arg> Input jar file
-l,--limit <arg> Maximum limit on classes to extract from
jars.[default=200]
-n,--namespace <arg> C++ namespace for newly generated classes.
-o,--output <arg> Output C++ source file.
-p,--package <arg> Java Package prefix to extract
Example
Given the following java class:
public class Simple {
final int value;
public Simple(int value) {
this.value = value;
}
public int getValue() {
return value;
}
}
Compiled just with:
javac Simple.java
C++ header and sources could be generated with:
java -jar ../../target/java4cpp-1.0-SNAPSHOT-jar-with-dependencies.jar -c Simple
So that the C++ code to use the class could be just this:
#include "simple.h"
#include <iostream>
using namespace simple;
using namespace std;
int main(int argc, const char **argv){
Simple s(4);
cout << "s.getValue() = " << s.getValue() << endl;
}
For complete compile and link instructions, Visual Studio Solution and Project files etc. see the examples/simple subdirectory. For more advanced options see the other examples directories( TO BE DEVELOPED ) and/or wiki (https://github.com/wshackle/java4cpp/wiki)
