/**
* Generates code to convert a wrapped value type to a primitive type. Handles unwrapping
* java.lang.Boolean, and java.lang.Number types. Generates the appropriate RETURN bytecode.
*/
static void generateReturnResult(
ClassFileWriter cfw, Class<?> retType, boolean callConvertResult) {
// wrap boolean values with java.lang.Boolean, convert all other
// primitive values to java.lang.Double.
if (retType == Void.TYPE) {
cfw.add(ByteCode.POP);
cfw.add(ByteCode.RETURN);
} else if (retType == Boolean.TYPE) {
cfw.addInvoke(
ByteCode.INVOKESTATIC, "aurora/javascript/Context", "toBoolean", "(Ljava/lang/Object;)Z");
cfw.add(ByteCode.IRETURN);
} else if (retType == Character.TYPE) {
// characters are represented as strings in JavaScript.
// return the first character.
// first convert the value to a string if possible.
cfw.addInvoke(
ByteCode.INVOKESTATIC,
"aurora/javascript/Context",
"toString",
"(Ljava/lang/Object;)Ljava/lang/String;");
cfw.add(ByteCode.ICONST_0);
cfw.addInvoke(ByteCode.INVOKEVIRTUAL, "java/lang/String", "charAt", "(I)C");
cfw.add(ByteCode.IRETURN);
} else if (retType.isPrimitive()) {
cfw.addInvoke(
ByteCode.INVOKESTATIC, "aurora/javascript/Context", "toNumber", "(Ljava/lang/Object;)D");
String typeName = retType.getName();
switch (typeName.charAt(0)) {
case 'b':
case 's':
case 'i':
cfw.add(ByteCode.D2I);
cfw.add(ByteCode.IRETURN);
break;
case 'l':
cfw.add(ByteCode.D2L);
cfw.add(ByteCode.LRETURN);
break;
case 'f':
cfw.add(ByteCode.D2F);
cfw.add(ByteCode.FRETURN);
break;
case 'd':
cfw.add(ByteCode.DRETURN);
break;
default:
throw new RuntimeException("Unexpected return type " + retType.toString());
}
} else {
String retTypeStr = retType.getName();
if (callConvertResult) {
cfw.addLoadConstant(retTypeStr);
cfw.addInvoke(
ByteCode.INVOKESTATIC,
"java/lang/Class",
"forName",
"(Ljava/lang/String;)Ljava/lang/Class;");
cfw.addInvoke(
ByteCode.INVOKESTATIC,
"aurora/javascript/JavaAdapter",
"convertResult",
"(Ljava/lang/Object;" + "Ljava/lang/Class;" + ")Ljava/lang/Object;");
}
// Now cast to return type
cfw.add(ByteCode.CHECKCAST, retTypeStr);
cfw.add(ByteCode.ARETURN);
}
}
