Framework target: using Java classes as native ObjC #457
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…tomClass java object natively from objc/swift.
It was not possible as to use class its metadata have to be available as OBJC_CLASS_$_{class_name}. Otherwise compilation fails on linkage stage.
RoboVM doesn't generate static metadata. Instead it creates ObjC classes dynamically runtime.
To achieve following was done:
- for each CustomClass OBJC_CLASS_$_{class_name} structure is allocated compilation time;
- OBJC_CLASS_$_{class_name} structs being filled with data once Java class is loaded and corresponding ObjC class is created;
- framework support is modified to preload all CustomClasses exposed by Framework when framework loads
ObjCMemberPlugin:
- <cinit> modified to copy ObjCClass.getHandle into OBJC_CLASS_$_{class_name}
- also it replaces the handle in ObjCClass. with pointer to OBJC_CLASS_$_{class_name} (so both Java and native side will have same Class pointer)
FrameworkTarget:
- all OBJC_CLASS_$_{class_name} added to exported symbols
ClassCompiler:
- added compiler for $publishObjClass in CustomClass
Linker:
- added functionality to embed global symbols. In particular this is required to export list of classes to preload in _bcFrameworkPreloadClasses
Frameworksupport:
- now it starts VM once framework is loaded
- also it preload required custom classes
- old functionality maintained to allow old code that was using rvmInstantiateFramework to work
… no such item anymore in framework target
…k.name and framework.executable are different broken framework was produced
…k.name and framework.executable are different broken framework was produced
|
Very cool stuff! |
dkimitsa
added a commit
to dkimitsa/robovm
that referenced
this pull request
Apr 9, 2020
* * FrameworkTarget: exporting OBJC_CLASS to allow instantiation of CustomClass java object natively from objc/swift.
It was not possible as to use class its metadata have to be available as OBJC_CLASS_$_{class_name}. Otherwise compilation fails on linkage stage.
RoboVM doesn't generate static metadata. Instead it creates ObjC classes dynamically runtime.
To achieve following was done:
- for each CustomClass OBJC_CLASS_$_{class_name} structure is allocated compilation time;
- OBJC_CLASS_$_{class_name} structs being filled with data once Java class is loaded and corresponding ObjC class is created;
- framework support is modified to preload all CustomClasses exposed by Framework when framework loads
ObjCMemberPlugin:
- <cinit> modified to copy ObjCClass.getHandle into OBJC_CLASS_$_{class_name}
- also it replaces the handle in ObjCClass. with pointer to OBJC_CLASS_$_{class_name} (so both Java and native side will have same Class pointer)
FrameworkTarget:
- all OBJC_CLASS_$_{class_name} added to exported symbols
ClassCompiler:
- added compiler for $publishObjClass in CustomClass
Linker:
- added functionality to embed global symbols. In particular this is required to export list of classes to preload in _bcFrameworkPreloadClasses
Frameworksupport:
- now it starts VM once framework is loaded
- also it preload required custom classes
- old functionality maintained to allow old code that was using rvmInstantiateFramework to work
* * FrameworkTarget: template updated to match ObjC changes
* * FrameworkTarget: idea -- removed main class from wizard as there is no such item anymore in framework target
* * FrameworkTarget: template -- fixed imageName, otherwise if framework.name and framework.executable are different broken framework was produced
* * FrameworkTarget: template -- fixed imageName, otherwise if framework.name and framework.executable are different broken framework was produced
* * fixed typos
dkimitsa
added a commit
to dkimitsa/robovm
that referenced
this pull request
Apr 9, 2020
* * FrameworkTarget: exporting OBJC_CLASS to allow instantiation of CustomClass java object natively from objc/swift.
It was not possible as to use class its metadata have to be available as OBJC_CLASS_$_{class_name}. Otherwise compilation fails on linkage stage.
RoboVM doesn't generate static metadata. Instead it creates ObjC classes dynamically runtime.
To achieve following was done:
- for each CustomClass OBJC_CLASS_$_{class_name} structure is allocated compilation time;
- OBJC_CLASS_$_{class_name} structs being filled with data once Java class is loaded and corresponding ObjC class is created;
- framework support is modified to preload all CustomClasses exposed by Framework when framework loads
ObjCMemberPlugin:
- <cinit> modified to copy ObjCClass.getHandle into OBJC_CLASS_$_{class_name}
- also it replaces the handle in ObjCClass. with pointer to OBJC_CLASS_$_{class_name} (so both Java and native side will have same Class pointer)
FrameworkTarget:
- all OBJC_CLASS_$_{class_name} added to exported symbols
ClassCompiler:
- added compiler for $publishObjClass in CustomClass
Linker:
- added functionality to embed global symbols. In particular this is required to export list of classes to preload in _bcFrameworkPreloadClasses
Frameworksupport:
- now it starts VM once framework is loaded
- also it preload required custom classes
- old functionality maintained to allow old code that was using rvmInstantiateFramework to work
* * FrameworkTarget: template updated to match ObjC changes
* * FrameworkTarget: idea -- removed main class from wizard as there is no such item anymore in framework target
* * FrameworkTarget: template -- fixed imageName, otherwise if framework.name and framework.executable are different broken framework was produced
* * FrameworkTarget: template -- fixed imageName, otherwise if framework.name and framework.executable are different broken framework was produced
* * fixed typos
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This PR improves the way Java code might be used in ObjC/Swift project by exposing java @CustomClass object to native side, so these can be instantiated directly as simple as [[MyClass alloc] init] and JVM is started automatically.
For this:
OBJC_CLASS_$_${CLASSNAME}symbols that is needed at native part during linkage;OBJC_CLASS_$_${CLASSNAME}once backing ObjC class is dynamically created runtime once Java class is loaded;