private void addGetter(String methodName, String methodDescriptor, MethodCodeBody body)
throws Exception {
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, methodName, methodDescriptor, null, new String[0]);
methodVisitor.visitCode();
body.add(methodVisitor);
methodVisitor.visitInsn(Opcodes.ARETURN);
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
private void addSetter(Method method, MethodCodeBody body) throws Exception {
String methodDescriptor = Type.getMethodDescriptor(method);
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, method.getName(), methodDescriptor, null, new String[0]);
methodVisitor.visitCode();
body.add(methodVisitor);
methodVisitor.visitInsn(Opcodes.RETURN);
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
public void addSetMethod(MetaBeanProperty property) throws Exception {
MetaMethod setter = property.getSetter();
Type paramType = Type.getType(setter.getParameterTypes()[0].getTheClass());
Type returnType = Type.getType(setter.getReturnType());
String setterDescriptor = Type.getMethodDescriptor(returnType, new Type[] {paramType});
// GENERATE public void <propName>(<type> v) { <setter>(v) }
String setMethodDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {paramType});
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, property.getName(), setMethodDescriptor, null, new String[0]);
methodVisitor.visitCode();
// GENERATE <setter>(v)
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
methodVisitor.visitVarInsn(paramType.getOpcode(Opcodes.ILOAD), 1);
methodVisitor.visitMethodInsn(
Opcodes.INVOKEVIRTUAL,
generatedType.getInternalName(),
setter.getName(),
setterDescriptor);
// END
methodVisitor.visitInsn(Opcodes.RETURN);
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
public void addConstructor(Constructor<?> constructor) throws Exception {
List<Type> paramTypes = new ArrayList<Type>();
for (Class<?> paramType : constructor.getParameterTypes()) {
paramTypes.add(Type.getType(paramType));
}
String methodDescriptor =
Type.getMethodDescriptor(Type.VOID_TYPE, paramTypes.toArray(new Type[paramTypes.size()]));
String signature = signature(constructor);
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, "<init>", methodDescriptor, signature, new String[0]);
methodVisitor.visitCode();
// this.super(p0 .. pn)
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
for (int i = 0; i < constructor.getParameterTypes().length; i++) {
methodVisitor.visitVarInsn(
Type.getType(constructor.getParameterTypes()[i]).getOpcode(Opcodes.ILOAD), i + 1);
}
methodVisitor.visitMethodInsn(
Opcodes.INVOKESPECIAL, superclassType.getInternalName(), "<init>", methodDescriptor);
if (initDynamicObjectHelper != null) {
initDynamicObjectHelper.add(methodVisitor);
}
if (initConventionAwareHelper != null) {
initConventionAwareHelper.add(methodVisitor);
}
if (initMetaClass != null) {
initMetaClass.add(methodVisitor);
}
methodVisitor.visitInsn(Opcodes.RETURN);
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
public void addActionMethod(MetaMethod method) throws Exception {
Type actionImplType = Type.getType(ClosureBackedAction.class);
Type closureType = Type.getType(Closure.class);
String methodDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {closureType});
// GENERATE public void <method>(Closure v) { <method>(new ClosureBackedAction(v)); }
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, method.getName(), methodDescriptor, null, new String[0]);
methodVisitor.visitCode();
// GENERATE <method>(new ClosureBackedAction(v));
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
// GENERATE new ClosureBackedAction(v);
methodVisitor.visitTypeInsn(Opcodes.NEW, actionImplType.getInternalName());
methodVisitor.visitInsn(Opcodes.DUP);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 1);
String constuctorDescriptor =
Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {closureType});
methodVisitor.visitMethodInsn(
Opcodes.INVOKESPECIAL, actionImplType.getInternalName(), "<init>", constuctorDescriptor);
methodDescriptor =
Type.getMethodDescriptor(
Type.getType(method.getReturnType()),
new Type[] {Type.getType(method.getParameterTypes()[0].getTheClass())});
methodVisitor.visitMethodInsn(
Opcodes.INVOKEVIRTUAL,
generatedType.getInternalName(),
method.getName(),
methodDescriptor);
methodVisitor.visitInsn(Opcodes.RETURN);
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
public void overrideSetMethod(MetaBeanProperty property, MetaMethod metaMethod)
throws Exception {
Type paramType = Type.getType(metaMethod.getParameterTypes()[0].getTheClass());
Type returnType = Type.getType(metaMethod.getReturnType());
String methodDescriptor = Type.getMethodDescriptor(returnType, new Type[] {paramType});
// GENERATE public <returnType> <propName>(<type> v) { val = super.<propName>(v); <prop>Set =
// true; return val; }
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, metaMethod.getName(), methodDescriptor, null, new String[0]);
methodVisitor.visitCode();
// GENERATE super.<propName>(v)
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
methodVisitor.visitVarInsn(paramType.getOpcode(Opcodes.ILOAD), 1);
methodVisitor.visitMethodInsn(
Opcodes.INVOKESPECIAL,
superclassType.getInternalName(),
metaMethod.getName(),
methodDescriptor);
// GENERATE <prop>Set = true
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
methodVisitor.visitLdcInsn(true);
methodVisitor.visitFieldInsn(
Opcodes.PUTFIELD,
generatedType.getInternalName(),
String.format("%sSet", property.getName()),
Type.BOOLEAN_TYPE.getDescriptor());
// END
methodVisitor.visitInsn(returnType.getOpcode(Opcodes.IRETURN));
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
private void addConventionGetter(String getterName, String flagName, MetaBeanProperty property)
throws Exception {
// GENERATE public <type> <getter>() { return
// (<type>)getConventionMapping().getConventionValue(super.<getter>(), '<prop>', <prop>Set); }
MetaMethod getter = property.getGetter();
Type returnType = Type.getType(getter.getReturnType());
String methodDescriptor = Type.getMethodDescriptor(returnType, new Type[0]);
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, getterName, methodDescriptor, null, new String[0]);
methodVisitor.visitCode();
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
methodVisitor.visitMethodInsn(
Opcodes.INVOKEINTERFACE,
conventionAwareType.getInternalName(),
"getConventionMapping",
Type.getMethodDescriptor(conventionMappingType, new Type[0]));
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
methodVisitor.visitMethodInsn(
Opcodes.INVOKESPECIAL, superclassType.getInternalName(), getterName, methodDescriptor);
Type boxedType = null;
if (getter.getReturnType().isPrimitive()) {
// Box value
boxedType =
Type.getType(JavaReflectionUtil.getWrapperTypeForPrimitiveType(getter.getReturnType()));
String valueOfMethodDescriptor =
Type.getMethodDescriptor(boxedType, new Type[] {returnType});
methodVisitor.visitMethodInsn(
Opcodes.INVOKESTATIC, boxedType.getInternalName(), "valueOf", valueOfMethodDescriptor);
}
methodVisitor.visitLdcInsn(property.getName());
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
methodVisitor.visitFieldInsn(
Opcodes.GETFIELD,
generatedType.getInternalName(),
flagName,
Type.BOOLEAN_TYPE.getDescriptor());
String getConventionValueDesc =
Type.getMethodDescriptor(
ConventionMapping.class.getMethod(
"getConventionValue", Object.class, String.class, Boolean.TYPE));
methodVisitor.visitMethodInsn(
Opcodes.INVOKEINTERFACE,
conventionMappingType.getInternalName(),
"getConventionValue",
getConventionValueDesc);
if (getter.getReturnType().isPrimitive()) {
// Unbox value
methodVisitor.visitTypeInsn(Opcodes.CHECKCAST, boxedType.getInternalName());
String valueMethodDescriptor = Type.getMethodDescriptor(returnType, new Type[0]);
methodVisitor.visitMethodInsn(
Opcodes.INVOKEVIRTUAL,
boxedType.getInternalName(),
getter.getReturnType().getName() + "Value",
valueMethodDescriptor);
} else {
// Cast to return type
methodVisitor.visitTypeInsn(
Opcodes.CHECKCAST,
getter.getReturnType().isArray()
? "[" + returnType.getElementType().getDescriptor()
: returnType.getInternalName());
}
methodVisitor.visitInsn(returnType.getOpcode(Opcodes.IRETURN));
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
public void addDynamicMethods() throws Exception {
// GENERATE public Object getProperty(String name) { return
// getAsDynamicObject().getProperty(name); }
addGetter(
GroovyObject.class.getDeclaredMethod("getProperty", String.class),
new MethodCodeBody() {
public void add(MethodVisitor methodVisitor) throws Exception {
// GENERATE getAsDynamicObject().getProperty(name);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
String getAsDynamicObjectDesc =
Type.getMethodDescriptor(
DynamicObjectAware.class.getDeclaredMethod("getAsDynamicObject"));
methodVisitor.visitMethodInsn(
Opcodes.INVOKEVIRTUAL,
generatedType.getInternalName(),
"getAsDynamicObject",
getAsDynamicObjectDesc);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 1);
String getPropertyDesc =
Type.getMethodDescriptor(
DynamicObject.class.getDeclaredMethod("getProperty", String.class));
methodVisitor.visitMethodInsn(
Opcodes.INVOKEINTERFACE,
dynamicObjectType.getInternalName(),
"getProperty",
getPropertyDesc);
// END
}
});
// GENERATE public boolean hasProperty(String name) { return
// getAsDynamicObject().hasProperty(name) }
String methodDescriptor =
Type.getMethodDescriptor(
Type.getType(Boolean.TYPE), new Type[] {Type.getType(String.class)});
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, "hasProperty", methodDescriptor, null, new String[0]);
methodVisitor.visitCode();
// GENERATE getAsDynamicObject().hasProperty(name);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
String getAsDynamicObjectDesc =
Type.getMethodDescriptor(
DynamicObjectAware.class.getDeclaredMethod("getAsDynamicObject"));
methodVisitor.visitMethodInsn(
Opcodes.INVOKEVIRTUAL,
generatedType.getInternalName(),
"getAsDynamicObject",
getAsDynamicObjectDesc);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 1);
String getPropertyDesc =
Type.getMethodDescriptor(
DynamicObject.class.getDeclaredMethod("hasProperty", String.class));
methodVisitor.visitMethodInsn(
Opcodes.INVOKEINTERFACE,
dynamicObjectType.getInternalName(),
"hasProperty",
getPropertyDesc);
// END
methodVisitor.visitInsn(Opcodes.IRETURN);
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
// GENERATE public void setProperty(String name, Object value) {
// getAsDynamicObject().setProperty(name, value); }
addSetter(
GroovyObject.class.getDeclaredMethod("setProperty", String.class, Object.class),
new MethodCodeBody() {
public void add(MethodVisitor methodVisitor) throws Exception {
// GENERATE getAsDynamicObject().setProperty(name, value)
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
String getAsDynamicObjectDesc =
Type.getMethodDescriptor(
DynamicObjectAware.class.getDeclaredMethod("getAsDynamicObject"));
methodVisitor.visitMethodInsn(
Opcodes.INVOKEVIRTUAL,
generatedType.getInternalName(),
"getAsDynamicObject",
getAsDynamicObjectDesc);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 1);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 2);
String setPropertyDesc =
Type.getMethodDescriptor(
DynamicObject.class.getDeclaredMethod(
"setProperty", String.class, Object.class));
methodVisitor.visitMethodInsn(
Opcodes.INVOKEINTERFACE,
dynamicObjectType.getInternalName(),
"setProperty",
setPropertyDesc);
// END
}
});
// GENERATE public Object invokeMethod(String name, Object params) { return
// getAsDynamicObject().invokeMethod(name, (Object[])params); }
addGetter(
GroovyObject.class.getDeclaredMethod("invokeMethod", String.class, Object.class),
new MethodCodeBody() {
public void add(MethodVisitor methodVisitor) throws Exception {
String invokeMethodDesc =
Type.getMethodDescriptor(
Type.getType(Object.class),
new Type[] {Type.getType(String.class), Type.getType(Object[].class)});
String objArrayDesc = Type.getType(Object[].class).getDescriptor();
// GENERATE getAsDynamicObject().invokeMethod(name, (args instanceof Object[]) ? args
// : new Object[] { args })
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
String getAsDynamicObjectDesc =
Type.getMethodDescriptor(
DynamicObjectAware.class.getDeclaredMethod("getAsDynamicObject"));
methodVisitor.visitMethodInsn(
Opcodes.INVOKEVIRTUAL,
generatedType.getInternalName(),
"getAsDynamicObject",
getAsDynamicObjectDesc);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 1);
// GENERATE (args instanceof Object[]) ? args : new Object[] { args }
methodVisitor.visitVarInsn(Opcodes.ALOAD, 2);
methodVisitor.visitTypeInsn(Opcodes.INSTANCEOF, objArrayDesc);
Label end = new Label();
Label notArray = new Label();
methodVisitor.visitJumpInsn(Opcodes.IFEQ, notArray);
// Generate args
// methodVisitor.visitInsn(Opcodes.ACONST_NULL);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 2);
methodVisitor.visitTypeInsn(Opcodes.CHECKCAST, objArrayDesc);
methodVisitor.visitJumpInsn(Opcodes.GOTO, end);
// Generate new Object[] { args }
methodVisitor.visitLabel(notArray);
methodVisitor.visitInsn(Opcodes.ICONST_1);
methodVisitor.visitTypeInsn(
Opcodes.ANEWARRAY, Type.getType(Object.class).getInternalName());
methodVisitor.visitInsn(Opcodes.DUP);
methodVisitor.visitInsn(Opcodes.ICONST_0);
methodVisitor.visitVarInsn(Opcodes.ALOAD, 2);
methodVisitor.visitInsn(Opcodes.AASTORE);
methodVisitor.visitLabel(end);
methodVisitor.visitMethodInsn(
Opcodes.INVOKEINTERFACE,
dynamicObjectType.getInternalName(),
"invokeMethod",
invokeMethodDesc);
}
});
}