std::map<std::string,std::string> conversion of JavaCPP - javacpp

Question

I'm a newbie of JavaCPP, right now I've got a problem.
my TestLibrary.h:
#include <string>
#include <map>
class TestClass {
public:
TestClass() {
property["a"]="b";
}
const std::map<std::string,std::string>& getMap(std::string str) {
if (str == "a"){
return property;
}
}
std::map<std::string,std::string> property;
};
TestLibrary.java
import org.bytedeco.javacpp.*;
import org.bytedeco.javacpp.annotation.*;
#Platform(include="TestLibrary.h")
public class TestLibrary {
public static class TestClass extends Pointer {
static { Loader.load(); }
public TestClass() { allocate(); }
private native void allocate();
public static native #ByRef KeyValueMap getMap(String str);
}
#Name("std::map<std::string,std::string>") public static class
KeyValueMap extends Pointer {
static { Loader.load(); }
public KeyValueMap(Pointer p) { super(p); }
public KeyValueMap() { allocate(); }
private native void allocate();
public native long size();
#Index public native #StdString BytePointer get(#StdString
BytePointer i);
public native KeyValueMap put(#StdString BytePointer i, BytePointer
value);
}
public static void main(String[] args) {
TestClass l = new TestClass();
KeyValueMap m = l.getMap("a");
System.out.println(m);
//System.out.println(m.get("a"));
}
}
when
javac -cp javacpp.jar TestLibrary.java
java -jar javacpp.jar TestLibrary
jniTestLibrary.cpp:2238:30: error: call to non-static member
function without an object argument
rptr = &::TestClass::getMap(ptr0);
~~~~~~~~~~~~~^~~~~~
the code above is modified from the NativeLibrary example. But How to solve the compile problem?
And can I use m.get("a") like that?

Answer 1

I managed to do this by changing...
TestLibrary.h:
#include <string>
#include <map>
class TestClass {
public:
TestClass() {
property["a"]="b";
}
std::map<std::string,std::string>& getMap(std::string str) {
if (str == "a"){
return property;
}
}
std::map<std::string,std::string> property;
};
TestLibrary.java
import org.bytedeco.javacpp.*;
import org.bytedeco.javacpp.annotation.*;
#Platform(include="TestLibrary.h")
public class TestLibrary {
public static class TestClass extends Pointer {
static { Loader.load(); }
public TestClass() { allocate(); }
private native void allocate();
public native #ByRef KeyValueMap getMap(String str);
}
#Name("std::map<std::string,std::string>")
public static class KeyValueMap extends Pointer {
static { Loader.load(); }
public KeyValueMap(Pointer p) { super(p); }
public KeyValueMap() { allocate(); }
private native void allocate();
public native long size();
#Index public native #StdString BytePointer get(#StdString BytePointer i);
public native KeyValueMap put(#StdString BytePointer i, BytePointer value); }
public static void main(String[] args) {
TestClass l = new TestClass();
KeyValueMap m = l.getMap("a");
System.out.println(m.size());
System.out.println(m.get(new BytePointer("a")).getString());
}}