Sharing output streams through a JNI interface
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by Chris Conway
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Published on 2009-09-16T20:07:00Z
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2010/04/27
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I am writing a Java application that uses a C++ library through a JNI interface. The C++ library creates objects of type Foo, which are duly passed up through JNI to Java.
Suppose the library has an output function
void Foo::print(std::ostream &os)
and I have a Java OutputStream out. How can I invoke Foo::print from Java so that the output appears on out? Is there any way to coerce the OutputStream to a std::ostream in the JNI layer? Can I capture the output in a buffer the JNI layer and then copy it into out?
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