/**
* Generates code to wrap Java arguments into Object[]. Non-primitive Java types are left as-is
* pending conversion in the helper method. Leaves the array object on the top of the stack.
*/
static void generatePushWrappedArgs(ClassFileWriter cfw, Class<?>[] argTypes, int arrayLength) {
// push arguments
cfw.addPush(arrayLength);
cfw.add(ByteCode.ANEWARRAY, "java/lang/Object");
int paramOffset = 1;
for (int i = 0; i != argTypes.length; ++i) {
cfw.add(ByteCode.DUP); // duplicate array reference
cfw.addPush(i);
paramOffset += generateWrapArg(cfw, paramOffset, argTypes[i]);
cfw.add(ByteCode.AASTORE);
}
}
private static void generateMethod(
ClassFileWriter cfw,
String genName,
String methodName,
Class<?>[] parms,
Class<?> returnType,
boolean convertResult) {
StringBuilder sb = new StringBuilder();
int paramsEnd = appendMethodSignature(parms, returnType, sb);
String methodSignature = sb.toString();
cfw.startMethod(methodName, methodSignature, ClassFileWriter.ACC_PUBLIC);
// Prepare stack to call method
// push factory
cfw.add(ByteCode.ALOAD_0);
cfw.add(ByteCode.GETFIELD, genName, "factory", "Laurora/javascript/ContextFactory;");
// push self
cfw.add(ByteCode.ALOAD_0);
cfw.add(ByteCode.GETFIELD, genName, "self", "Laurora/javascript/Scriptable;");
// push function
cfw.add(ByteCode.ALOAD_0);
cfw.add(ByteCode.GETFIELD, genName, "delegee", "Laurora/javascript/Scriptable;");
cfw.addPush(methodName);
cfw.addInvoke(
ByteCode.INVOKESTATIC,
"aurora/javascript/JavaAdapter",
"getFunction",
"(Laurora/javascript/Scriptable;" + "Ljava/lang/String;" + ")Laurora/javascript/Function;");
// push arguments
generatePushWrappedArgs(cfw, parms, parms.length);
// push bits to indicate which parameters should be wrapped
if (parms.length > 64) {
// If it will be an issue, then passing a static boolean array
// can be an option, but for now using simple bitmask
throw Context.reportRuntimeError0(
"JavaAdapter can not subclass methods with more then" + " 64 arguments.");
}
long convertionMask = 0;
for (int i = 0; i != parms.length; ++i) {
if (!parms[i].isPrimitive()) {
convertionMask |= (1 << i);
}
}
cfw.addPush(convertionMask);
// go through utility method, which creates a Context to run the
// method in.
cfw.addInvoke(
ByteCode.INVOKESTATIC,
"aurora/javascript/JavaAdapter",
"callMethod",
"(Laurora/javascript/ContextFactory;"
+ "Laurora/javascript/Scriptable;"
+ "Laurora/javascript/Function;"
+ "[Ljava/lang/Object;"
+ "J"
+ ")Ljava/lang/Object;");
generateReturnResult(cfw, returnType, convertResult);
cfw.stopMethod((short) paramsEnd);
}