本文整理汇总了Java中jdk.internal.org.objectweb.asm.commons.InstructionAdapter.visitInsn方法的典型用法代码示例。如果您正苦于以下问题:Java InstructionAdapter.visitInsn方法的具体用法?Java InstructionAdapter.visitInsn怎么用?Java InstructionAdapter.visitInsn使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类jdk.internal.org.objectweb.asm.commons.InstructionAdapter
的用法示例。
在下文中一共展示了InstructionAdapter.visitInsn方法的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: generateOverridingConstructorWithObjectParam
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private void generateOverridingConstructorWithObjectParam(final InstructionAdapter mv, final Constructor<?> ctor, final String ctorDescriptor) {
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
final Class<?>[] argTypes = ctor.getParameterTypes();
int offset = 1; // First arg is at position 1, after this.
for (int i = 0; i < argTypes.length; ++i) {
final Type argType = Type.getType(argTypes[i]);
mv.load(offset, argType);
offset += argType.getSize();
}
mv.invokespecial(superClassName, INIT, ctorDescriptor, false);
mv.visitVarInsn(ALOAD, offset);
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ACONST_NULL);
mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "getHandle", GET_HANDLE_OBJECT_DESCRIPTOR, false);
endInitMethod(mv);
}
示例2: convertReturnValue
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private static void convertReturnValue(final InstructionAdapter mv, final Class<?> origReturnType) {
if (origReturnType == void.class) {
mv.pop();
} else if (origReturnType == Object.class) {
// Must hide ConsString (and potentially other internal Nashorn types) from callers
EXPORT_RETURN_VALUE.invoke(mv);
} else if (origReturnType == byte.class) {
mv.visitInsn(I2B);
} else if (origReturnType == short.class) {
mv.visitInsn(I2S);
} else if (origReturnType == float.class) {
mv.visitInsn(D2F);
} else if (origReturnType == char.class) {
TO_CHAR_PRIMITIVE.invoke(mv);
}
}
示例3: generateFinalizerDelegate
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private void generateFinalizerDelegate(final String finalizerDelegateName) {
// Generate a delegate that will be invoked from the no-permission trampoline. Note it can be private, as we'll
// refer to it with a MethodHandle constant pool entry in the overridden finalize() method (see
// generateFinalizerOverride()).
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PRIVATE | ACC_STATIC,
finalizerDelegateName, Type.getMethodDescriptor(Type.VOID_TYPE, OBJECT_TYPE), null, null));
// Simply invoke super.finalize()
mv.visitVarInsn(ALOAD, 0);
mv.checkcast(Type.getType(generatedClassName));
mv.invokespecial(superClassName, "finalize", Type.getMethodDescriptor(Type.VOID_TYPE), false);
mv.visitInsn(RETURN);
endMethod(mv);
}
示例4: generateFinalizerOverride
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private void generateFinalizerOverride(final String finalizerDelegateName) {
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PUBLIC, "finalize",
VOID_NOARG_METHOD_DESCRIPTOR, null, null));
// Overridden finalizer will take a MethodHandle to the finalizer delegating method, ...
mv.aconst(new Handle(Opcodes.H_INVOKESTATIC, generatedClassName, finalizerDelegateName,
Type.getMethodDescriptor(Type.VOID_TYPE, OBJECT_TYPE)));
mv.visitVarInsn(ALOAD, 0);
// ...and invoke it through JavaAdapterServices.invokeNoPermissions
mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "invokeNoPermissions",
Type.getMethodDescriptor(METHOD_HANDLE_TYPE, OBJECT_TYPE), false);
mv.visitInsn(RETURN);
endMethod(mv);
}
示例5: convertParam
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
/**
* Emits instruction for converting a parameter on the top of the stack to
* a type that is understood by Nashorn.
* @param mv the current method visitor
* @param t the type on the top of the stack
* @param varArg if the invocation will be variable arity
*/
private static void convertParam(final InstructionAdapter mv, final Type t, final boolean varArg) {
// We perform conversions of some primitives to accommodate types that
// Nashorn can handle.
switch(t.getSort()) {
case Type.CHAR:
// Chars are boxed, as we don't know if the JS code wants to treat
// them as an effective "unsigned short" or as a single-char string.
CHAR_VALUE_OF.invoke(mv);
break;
case Type.FLOAT:
// Floats are widened to double.
mv.visitInsn(Opcodes.F2D);
if (varArg) {
// We'll be boxing everything anyway for the vararg invocation,
// so we might as well do it proactively here and thus not cause
// a widening in the number of slots, as that could even make
// the array creation invocation go over 255 param slots.
DOUBLE_VALUE_OF.invoke(mv);
}
break;
case Type.LONG:
// Longs are boxed as Nashorn can't represent them precisely as a
// primitive number.
LONG_VALUE_OF.invoke(mv);
break;
case Type.OBJECT:
if(t.equals(OBJECT_TYPE)) {
// Object can carry a ScriptObjectMirror and needs to be unwrapped
// before passing into a Nashorn function.
UNWRAP.invoke(mv);
}
break;
}
}
示例6: generateFinalizerDelegate
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private void generateFinalizerDelegate() {
// Generate a delegate that will be invoked from the no-permission trampoline. Note it can be private, as we'll
// refer to it with a MethodHandle constant pool entry in the overridden finalize() method (see
// generateFinalizerOverride()).
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PRIVATE | ACC_STATIC,
FINALIZER_DELEGATE_NAME, FINALIZER_DELEGATE_METHOD_DESCRIPTOR, null, null));
// Simply invoke super.finalize()
mv.visitVarInsn(ALOAD, 0);
mv.checkcast(Type.getType(generatedClassName));
mv.invokespecial(superClassName, "finalize", VOID_METHOD_DESCRIPTOR, false);
mv.visitInsn(RETURN);
endMethod(mv);
}
示例7: generateFinalizerOverride
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private void generateFinalizerOverride() {
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PUBLIC, "finalize",
VOID_METHOD_DESCRIPTOR, null, null));
// Overridden finalizer will take a MethodHandle to the finalizer delegating method, ...
mv.aconst(new Handle(Opcodes.H_INVOKESTATIC, generatedClassName, FINALIZER_DELEGATE_NAME,
FINALIZER_DELEGATE_METHOD_DESCRIPTOR, false));
mv.visitVarInsn(ALOAD, 0);
// ...and invoke it through JavaAdapterServices.invokeNoPermissions
INVOKE_NO_PERMISSIONS.invoke(mv);
mv.visitInsn(RETURN);
endMethod(mv);
}
示例8: generateFinalizerOverride
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
@SuppressWarnings("deprecation")
private void generateFinalizerOverride() {
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PUBLIC, "finalize",
VOID_METHOD_DESCRIPTOR, null, null));
// Overridden finalizer will take a MethodHandle to the finalizer delegating method, ...
mv.aconst(new Handle(Opcodes.H_INVOKESTATIC, generatedClassName, FINALIZER_DELEGATE_NAME,
FINALIZER_DELEGATE_METHOD_DESCRIPTOR));
mv.visitVarInsn(ALOAD, 0);
// ...and invoke it through JavaAdapterServices.invokeNoPermissions
INVOKE_NO_PERMISSIONS.invoke(mv);
mv.visitInsn(RETURN);
endMethod(mv);
}
示例9: endInitMethod
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private static void endInitMethod(final InstructionAdapter mv) {
mv.visitInsn(RETURN);
endMethod(mv);
}
示例10: convertReturnValue
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private void convertReturnValue(final InstructionAdapter mv, final Class<?> returnType, final Type asmReturnType) {
switch(asmReturnType.getSort()) {
case Type.VOID:
mv.pop();
break;
case Type.BOOLEAN:
JSType.TO_BOOLEAN.invoke(mv);
break;
case Type.BYTE:
JSType.TO_INT32.invoke(mv);
mv.visitInsn(Opcodes.I2B);
break;
case Type.SHORT:
JSType.TO_INT32.invoke(mv);
mv.visitInsn(Opcodes.I2S);
break;
case Type.CHAR:
// JSType doesn't have a TO_CHAR, so we have services supply us one.
mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "toCharPrimitive", TO_CHAR_PRIMITIVE_METHOD_DESCRIPTOR, false);
break;
case Type.INT:
JSType.TO_INT32.invoke(mv);
break;
case Type.LONG:
JSType.TO_LONG.invoke(mv);
break;
case Type.FLOAT:
JSType.TO_NUMBER.invoke(mv);
mv.visitInsn(Opcodes.D2F);
break;
case Type.DOUBLE:
JSType.TO_NUMBER.invoke(mv);
break;
default:
if(asmReturnType.equals(OBJECT_TYPE)) {
// Must hide ConsString (and potentially other internal Nashorn types) from callers
mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "exportReturnValue", EXPORT_RETURN_VALUE_METHOD_DESCRIPTOR, false);
} else if(asmReturnType.equals(STRING_TYPE)){
// Well-known conversion to String. Not using the JSType one as we want to preserve null as null instead
// of the string "n,u,l,l".
mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "toString", TO_STRING_METHOD_DESCRIPTOR, false);
} else {
// Invoke converter method handle for everything else. Note that we could have just added an asType or
// filterReturnValue to the invoked handle instead, but then every instance would have the function
// method handle wrapped in a separate converter method handle, making handle.invokeExact() megamorphic.
if(classOverride) {
mv.getstatic(generatedClassName, converterFields.get(returnType), METHOD_HANDLE_TYPE_DESCRIPTOR);
} else {
mv.visitVarInsn(ALOAD, 0);
mv.getfield(generatedClassName, converterFields.get(returnType), METHOD_HANDLE_TYPE_DESCRIPTOR);
}
mv.swap();
emitInvokeExact(mv, MethodType.methodType(returnType, Object.class));
}
}
}
示例11: createNoPermissionsInvoker
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private static MethodHandle createNoPermissionsInvoker() {
final String className = "NoPermissionsInvoker";
final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
cw.visit(Opcodes.V1_7, ACC_PUBLIC | ACC_SUPER | ACC_FINAL, className, null, "java/lang/Object", null);
final Type objectType = Type.getType(Object.class);
final Type methodHandleType = Type.getType(MethodHandle.class);
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "invoke",
Type.getMethodDescriptor(Type.VOID_TYPE, methodHandleType, objectType), null, null));
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.invokevirtual(methodHandleType.getInternalName(), "invokeExact", Type.getMethodDescriptor(
Type.VOID_TYPE, objectType), false);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
cw.visitEnd();
final byte[] bytes = cw.toByteArray();
final ClassLoader loader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
@Override
public ClassLoader run() {
return new SecureClassLoader(null) {
@Override
protected Class<?> findClass(final String name) throws ClassNotFoundException {
if(name.equals(className)) {
return defineClass(name, bytes, 0, bytes.length, new ProtectionDomain(
new CodeSource(null, (CodeSigner[])null), new Permissions()));
}
throw new ClassNotFoundException(name);
}
};
}
});
try {
return MethodHandles.lookup().findStatic(Class.forName(className, true, loader), "invoke",
MethodType.methodType(void.class, MethodHandle.class, Object.class));
} catch(final ReflectiveOperationException e) {
throw new AssertionError(e.getMessage(), e);
}
}
示例12: createNoPermissionsInvoker
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private static MethodHandle createNoPermissionsInvoker() {
final String className = "NoPermissionsInvoker";
final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
cw.visit(Opcodes.V1_7, ACC_PUBLIC | ACC_SUPER | ACC_FINAL, className, null, "java/lang/Object", null);
final Type objectType = Type.getType(Object.class);
final Type methodHandleType = Type.getType(MethodHandle.class);
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "invoke",
Type.getMethodDescriptor(Type.VOID_TYPE, methodHandleType, objectType), null, null));
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.invokevirtual(methodHandleType.getInternalName(), "invokeExact", Type.getMethodDescriptor(
Type.VOID_TYPE, objectType), false);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
cw.visitEnd();
final byte[] bytes = cw.toByteArray();
final ClassLoader loader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
@Override
public ClassLoader run() {
return new SecureClassLoader(null) {
@Override
protected Class<?> findClass(final String name) throws ClassNotFoundException {
if(name.equals(className)) {
return defineClass(name, bytes, 0, bytes.length, new ProtectionDomain(
new CodeSource(null, (CodeSigner[])null), new Permissions()));
}
throw new ClassNotFoundException(name);
}
};
}
});
try {
return MethodHandles.publicLookup().findStatic(Class.forName(className, true, loader), "invoke",
MethodType.methodType(void.class, MethodHandle.class, Object.class));
} catch(final ReflectiveOperationException e) {
throw new AssertionError(e.getMessage(), e);
}
}
示例13: generateOverridingConstructor
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
/**
* Generates a constructor for the instance adapter class. This constructor will take the same arguments as the supertype
* constructor passed as the argument here, and delegate to it. However, it will take an additional argument of
* either ScriptObject or ScriptFunction type (based on the value of the "fromFunction" parameter), and initialize
* all the method handle fields of the adapter instance with functions from the script object (or the script
* function itself, if that's what's passed). There is one method handle field in the adapter class for every method
* that can be implemented or overridden; the name of every field is same as the name of the method, with a number
* suffix that makes it unique in case of overloaded methods. The generated constructor will invoke
* {@link #getHandle(ScriptFunction, MethodType, boolean)} or {@link #getHandle(Object, String, MethodType,
* boolean)} to obtain the method handles; these methods make sure to add the necessary conversions and arity
* adjustments so that the resulting method handles can be invoked from generated methods using {@code invokeExact}.
* The constructor that takes a script function will only initialize the methods with the same name as the single
* abstract method. The constructor will also store the Nashorn global that was current at the constructor
* invocation time in a field named "global". The generated constructor will be public, regardless of whether the
* supertype constructor was public or protected. The generated constructor will not be variable arity, even if the
* supertype constructor was.
* @param ctor the supertype constructor that is serving as the base for the generated constructor.
* @param fromFunction true if we're generating a constructor that initializes SAM types from a single
* ScriptFunction passed to it, false if we're generating a constructor that initializes an arbitrary type from a
* ScriptObject passed to it.
*/
private void generateOverridingConstructor(final Constructor<?> ctor, final boolean fromFunction) {
final Type originalCtorType = Type.getType(ctor);
final Type[] originalArgTypes = originalCtorType.getArgumentTypes();
final int argLen = originalArgTypes.length;
final Type[] newArgTypes = new Type[argLen + 1];
// Insert ScriptFunction|Object as the last argument to the constructor
final Type extraArgumentType = fromFunction ? SCRIPT_FUNCTION_TYPE : OBJECT_TYPE;
newArgTypes[argLen] = extraArgumentType;
System.arraycopy(originalArgTypes, 0, newArgTypes, 0, argLen);
// All constructors must be public, even if in the superclass they were protected.
// Existing super constructor <init>(this, args...) triggers generating <init>(this, scriptObj, args...).
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PUBLIC, INIT,
Type.getMethodDescriptor(originalCtorType.getReturnType(), newArgTypes), null, null));
mv.visitCode();
// First, invoke super constructor with original arguments. If the form of the constructor we're generating is
// <init>(this, args..., scriptFn), then we're invoking super.<init>(this, args...).
mv.visitVarInsn(ALOAD, 0);
final Class<?>[] argTypes = ctor.getParameterTypes();
int offset = 1; // First arg is at position 1, after this.
for (int i = 0; i < argLen; ++i) {
final Type argType = Type.getType(argTypes[i]);
mv.load(offset, argType);
offset += argType.getSize();
}
mv.invokespecial(superClassName, INIT, originalCtorType.getDescriptor());
// Get a descriptor to the appropriate "JavaAdapterFactory.getHandle" method.
final String getHandleDescriptor = fromFunction ? GET_HANDLE_FUNCTION_DESCRIPTOR : GET_HANDLE_OBJECT_DESCRIPTOR;
// Assign MethodHandle fields through invoking getHandle()
for (final MethodInfo mi : methodInfos) {
mv.visitVarInsn(ALOAD, 0);
if (fromFunction && !mi.getName().equals(samName)) {
// Constructors initializing from a ScriptFunction only initialize methods with the SAM name.
// NOTE: if there's a concrete overloaded method sharing the SAM name, it'll be overriden too. This
// is a deliberate design choice. All other method handles are initialized to null.
mv.visitInsn(ACONST_NULL);
} else {
mv.visitVarInsn(ALOAD, offset);
if(!fromFunction) {
mv.aconst(mi.getName());
}
mv.aconst(Type.getMethodType(mi.type.toMethodDescriptorString()));
mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "getHandle", getHandleDescriptor);
}
mv.putfield(generatedClassName, mi.methodHandleFieldName, METHOD_HANDLE_TYPE_DESCRIPTOR);
}
// Assign "this.global = Context.getGlobal()"
mv.visitVarInsn(ALOAD, 0);
invokeGetGlobalWithNullCheck(mv);
mv.putfield(generatedClassName, GLOBAL_FIELD_NAME, SCRIPT_OBJECT_TYPE_DESCRIPTOR);
endInitMethod(mv);
}
示例14: createNoPermissionsInvoker
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
private static MethodHandle createNoPermissionsInvoker() {
final String className = "NoPermissionsInvoker";
final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
cw.visit(Opcodes.V1_7, ACC_PUBLIC | ACC_SUPER | ACC_FINAL, className, null, "java/lang/Object", null);
final Type objectType = Type.getType(Object.class);
final Type methodHandleType = Type.getType(MethodHandle.class);
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "invoke",
Type.getMethodDescriptor(Type.VOID_TYPE, methodHandleType, objectType), null, null));
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.invokevirtual(methodHandleType.getInternalName(), "invokeExact", Type.getMethodDescriptor(
Type.VOID_TYPE, objectType), false);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
cw.visitEnd();
final byte[] bytes = cw.toByteArray();
final ClassLoader loader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
@Override
public ClassLoader run() {
return new SecureClassLoader(null) {
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
if(name.equals(className)) {
return defineClass(name, bytes, 0, bytes.length, new ProtectionDomain(
new CodeSource(null, (CodeSigner[])null), new Permissions()));
}
throw new ClassNotFoundException(name);
}
};
}
});
try {
return MethodHandles.lookup().findStatic(Class.forName(className, true, loader), "invoke",
MethodType.methodType(void.class, MethodHandle.class, Object.class));
} catch(ReflectiveOperationException e) {
throw new AssertionError(e.getMessage(), e);
}
}
示例15: generateOverridingConstructor
import jdk.internal.org.objectweb.asm.commons.InstructionAdapter; //导入方法依赖的package包/类
/**
* Generates a constructor for the adapter class. This constructor will take the same arguments as the supertype
* constructor passed as the argument here, and delegate to it. However, it will take an additional argument of
* either ScriptObject or ScriptFunction type (based on the value of the "fromFunction" parameter), and initialize
* all the method handle fields of the adapter instance with functions from the script object (or the script
* function itself, if that's what's passed). There is one method handle field in the adapter class for every method
* that can be implemented or overridden; the name of every field is same as the name of the method, with a number
* suffix that makes it unique in case of overloaded methods. The generated constructor will invoke
* {@link #getHandle(ScriptFunction, MethodType, boolean)} or {@link #getHandle(Object, String, MethodType,
* boolean)} to obtain the method handles; these methods make sure to add the necessary conversions and arity
* adjustments so that the resulting method handles can be invoked from generated methods using {@code invokeExact}.
* The constructor that takes a script function will only initialize the methods with the same name as the single
* abstract method. The constructor will also store the Nashorn global that was current at the constructor
* invocation time in a field named "global". The generated constructor will be public, regardless of whether the
* supertype constructor was public or protected. The generated constructor will not be variable arity, even if the
* supertype constructor was.
* @param ctor the supertype constructor that is serving as the base for the generated constructor.
* @param fromFunction true if we're generating a constructor that initializes SAM types from a single
* ScriptFunction passed to it, false if we're generating a constructor that initializes an arbitrary type from a
* ScriptObject passed to it.
*/
private void generateOverridingConstructor(final Constructor<?> ctor, final boolean fromFunction) {
final Type originalCtorType = Type.getType(ctor);
final Type[] originalArgTypes = originalCtorType.getArgumentTypes();
final int argLen = originalArgTypes.length;
final Type[] newArgTypes = new Type[argLen + 1];
// Insert ScriptFunction|Object as the last argument to the constructor
final Type extraArgumentType = fromFunction ? SCRIPT_FUNCTION_TYPE : OBJECT_TYPE;
newArgTypes[argLen] = extraArgumentType;
System.arraycopy(originalArgTypes, 0, newArgTypes, 0, argLen);
// All constructors must be public, even if in the superclass they were protected.
// Existing super constructor <init>(this, args...) triggers generating <init>(this, scriptObj, args...).
final InstructionAdapter mv = new InstructionAdapter(cw.visitMethod(ACC_PUBLIC, INIT,
Type.getMethodDescriptor(originalCtorType.getReturnType(), newArgTypes), null, null));
mv.visitCode();
// First, invoke super constructor with original arguments. If the form of the constructor we're generating is
// <init>(this, args..., scriptFn), then we're invoking super.<init>(this, args...).
mv.visitVarInsn(ALOAD, 0);
final Class<?>[] argTypes = ctor.getParameterTypes();
int offset = 1; // First arg is at position 1, after this.
for (int i = 0; i < argLen; ++i) {
final Type argType = Type.getType(argTypes[i]);
mv.load(offset, argType);
offset += argType.getSize();
}
mv.invokespecial(superClassName, INIT, originalCtorType.getDescriptor());
// Get a descriptor to the appropriate "JavaAdapterFactory.getHandle" method.
final String getHandleDescriptor = fromFunction ? GET_HANDLE_FUNCTION_DESCRIPTOR : GET_HANDLE_OBJECT_DESCRIPTOR;
// Assign MethodHandle fields through invoking getHandle()
for (final MethodInfo mi : methodInfos) {
mv.visitVarInsn(ALOAD, 0);
if (fromFunction && !mi.getName().equals(samName)) {
// Constructors initializing from a ScriptFunction only initialize methods with the SAM name.
// NOTE: if there's a concrete overloaded method sharing the SAM name, it'll be overriden too. This
// is a deliberate design choice. All other method handles are initialized to null.
mv.visitInsn(ACONST_NULL);
} else {
mv.visitVarInsn(ALOAD, offset);
if(!fromFunction) {
mv.aconst(mi.getName());
}
mv.aconst(Type.getMethodType(mi.type.toMethodDescriptorString()));
mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "getHandle", getHandleDescriptor);
}
mv.putfield(generatedClassName, mi.methodHandleInstanceFieldName, METHOD_HANDLE_TYPE_DESCRIPTOR);
}
// Assign "this.global = Context.getGlobal()"
mv.visitVarInsn(ALOAD, 0);
invokeGetGlobalWithNullCheck(mv);
mv.putfield(generatedClassName, GLOBAL_FIELD_NAME, SCRIPT_OBJECT_TYPE_DESCRIPTOR);
endInitMethod(mv);
}