Re: [Boost-users] Possible to use with JNI?

On Wed, Apr 15, 2015 at 2:32 PM, Damien wrote:

On 2015-04-15 12:23 PM, Michael Powell wrote:

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On Wed, Apr 15, 2015 at 10:57 AM, Yolanda Septiana wrote:

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Ah... I'm really lost here. The reason that I want to use Boost with Java is because I found that: The original VF2lib (ported from C to Java) is somehow slower than Boost. I checked by trying to find subgraph isomorphism between graph A (10 nodes) and graph B (500 nodes). VF2lib took longer than 5 minutes but Boost was just some milliseconds. (If someone can verify that I'll be really grateful).

So what option do I have to be able to use Boost? I think I should a file based graph generated by Java and process them with Boost.

On Wed, Apr 15, 2015, 9:30 PM Lorenzo Trivelli wrote:

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At 06:30 13/04/2015, you wrote:

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Hi, I really need to use Java with this library. Is it possible to use JNI on this library or do I need to convert this library to Java? I find the latter task is going to be really difficult so I hope that I can use JNI.

Thank you for your help.

Hi, AFAIK it is not easy to do that due to C++ name mangling and the absence of any ABI in C++ itself like C

A possible but limited workaround should be to create a DLL with a C interface which uses the boost objects you need. Next, you can call it through JNI, but obviously you can pass only basic data types

The expert opinion is that you should be able to develop a DLL with C interface, and leverage the Boost/C++ behind the C API. You'll need to know the data types translations between the two, but this should be readily documented, or for the most part more or less discoverable.

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regardds Lorenzo

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If you want to use a Java lib and save some interface pain, it might be worth checking this out:

http://stackoverflow.com/questions/51574/good-java-graph-algorithm-library

I was stopping just short of fishing for her. "You can given a man a fish, he has a meal..." In Christ.

Damien

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