/**
* Given a wrapped number type (Byte, Integer, Short, ...), generates bytecode to convert it to a
* primitive number (int, long, double) using calls to wrapped.[targetType]Value()
*
* @param mv method visitor
* @param sourceType the wrapped number type
* @param targetType the primitive target type
*/
public static void doCastToPrimitive(
MethodVisitor mv, ClassNode sourceType, ClassNode targetType) {
mv.visitMethodInsn(
INVOKEVIRTUAL,
BytecodeHelper.getClassInternalName(sourceType),
targetType.getName() + "Value",
"()" + BytecodeHelper.getTypeDescription(targetType));
}
public static void doCast(MethodVisitor mv, Class type) {
if (type == Object.class) return;
if (type.isPrimitive() && type != Void.TYPE) {
unbox(mv, type);
} else {
mv.visitTypeInsn(
CHECKCAST,
type.isArray()
? BytecodeHelper.getTypeDescription(type)
: BytecodeHelper.getClassInternalName(type.getName()));
}
}
public static void doCast(MethodVisitor mv, ClassNode type) {
if (type == ClassHelper.OBJECT_TYPE) return;
if (ClassHelper.isPrimitiveType(type) && type != ClassHelper.VOID_TYPE) {
unbox(mv, type);
} else {
mv.visitTypeInsn(
CHECKCAST,
type.isArray()
? BytecodeHelper.getTypeDescription(type)
: BytecodeHelper.getClassInternalName(type.getName()));
}
}
private void doConvertAndCast(ClassNode targetType, boolean coerce) {
int size = stack.size();
throwExceptionForNoStackElement(size, targetType, coerce);
ClassNode top = stack.get(size - 1);
targetType = targetType.redirect();
if (targetType == top) return;
if (coerce) {
controller.getInvocationWriter().coerce(top, targetType);
return;
}
boolean primTarget = ClassHelper.isPrimitiveType(targetType);
boolean primTop = ClassHelper.isPrimitiveType(top);
if (primTop && primTarget) {
// here we box and unbox to get the goal type
if (convertPrimitive(top, targetType)) {
replace(targetType);
return;
}
box();
} else if (primTop) {
// top is primitive, target is not
// so box and do groovy cast
controller.getInvocationWriter().castToNonPrimitiveIfNecessary(top, targetType);
} else if (primTarget) {
// top is not primitive so unbox
// leave that BH#doCast later
} else {
controller.getInvocationWriter().castToNonPrimitiveIfNecessary(top, targetType);
}
MethodVisitor mv = controller.getMethodVisitor();
if (primTarget
&& !ClassHelper.boolean_TYPE.equals(targetType)
&& !primTop
&& ClassHelper.getWrapper(targetType).equals(top)) {
BytecodeHelper.doCastToPrimitive(mv, top, targetType);
} else {
top = stack.get(size - 1);
if (!WideningCategories.implementsInterfaceOrSubclassOf(top, targetType)) {
BytecodeHelper.doCast(mv, targetType);
}
}
replace(targetType);
}
public void loadOrStoreVariable(BytecodeVariable variable, boolean useReferenceDirectly) {
CompileStack compileStack = controller.getCompileStack();
if (compileStack.isLHS()) {
storeVar(variable);
} else {
MethodVisitor mv = controller.getMethodVisitor();
int idx = variable.getIndex();
ClassNode type = variable.getType();
if (variable.isHolder()) {
mv.visitVarInsn(ALOAD, idx);
if (!useReferenceDirectly) {
mv.visitMethodInsn(
INVOKEVIRTUAL, "groovy/lang/Reference", "get", "()Ljava/lang/Object;", false);
BytecodeHelper.doCast(mv, type);
push(type);
} else {
push(ClassHelper.REFERENCE_TYPE);
}
} else {
load(type, idx);
}
}
}
/** Generates the bytecode to autobox the current value on the stack */
public static boolean box(MethodVisitor mv, Class type) {
if (ReflectionCache.getCachedClass(type).isPrimitive && type != void.class) {
String returnString = "(" + BytecodeHelper.getTypeDescription(type) + ")Ljava/lang/Object;";
mv.visitMethodInsn(INVOKESTATIC, DTT_CLASSNAME, "box", returnString);
return true;
}
return false;
}
boolean makeGetField(
final Expression receiver,
final ClassNode receiverType,
final String fieldName,
final boolean implicitThis,
final boolean samePackage) {
FieldNode field = receiverType.getField(fieldName);
// direct access is allowed if we are in the same class as the declaring class
// or we are in an inner class
if (field != null && isDirectAccessAllowed(field, controller.getClassNode(), samePackage)) {
CompileStack compileStack = controller.getCompileStack();
MethodVisitor mv = controller.getMethodVisitor();
if (field.isStatic()) {
mv.visitFieldInsn(
GETSTATIC,
BytecodeHelper.getClassInternalName(field.getOwner()),
fieldName,
BytecodeHelper.getTypeDescription(field.getOriginType()));
controller.getOperandStack().push(field.getOriginType());
} else {
if (implicitThis) {
compileStack.pushImplicitThis(implicitThis);
}
receiver.visit(controller.getAcg());
if (implicitThis) compileStack.popImplicitThis();
if (!controller.getOperandStack().getTopOperand().isDerivedFrom(field.getOwner())) {
mv.visitTypeInsn(CHECKCAST, BytecodeHelper.getClassInternalName(field.getOwner()));
}
mv.visitFieldInsn(
GETFIELD,
BytecodeHelper.getClassInternalName(field.getOwner()),
fieldName,
BytecodeHelper.getTypeDescription(field.getOriginType()));
}
controller.getOperandStack().replace(field.getOriginType());
return true;
}
ClassNode superClass = receiverType.getSuperClass();
if (superClass != null) {
return makeGetField(receiver, superClass, fieldName, implicitThis, false);
}
return false;
}
/** load the constant on the operand stack. */
public void pushConstant(ConstantExpression expression) {
MethodVisitor mv = controller.getMethodVisitor();
Object value = expression.getValue();
ClassNode origType = expression.getType().redirect();
ClassNode type = ClassHelper.getUnwrapper(origType);
boolean boxing = origType != type;
boolean asPrimitive = boxing || ClassHelper.isPrimitiveType(type);
if (value == null) {
mv.visitInsn(ACONST_NULL);
} else if (boxing && value instanceof Boolean) {
// special path for boxed boolean
Boolean bool = (Boolean) value;
String text = bool ? "TRUE" : "FALSE";
mv.visitFieldInsn(GETSTATIC, "java/lang/Boolean", text, "Ljava/lang/Boolean;");
boxing = false;
type = origType;
} else if (asPrimitive) {
pushPrimitiveConstant(mv, value, type);
} else if (value instanceof BigDecimal) {
String className = BytecodeHelper.getClassInternalName(value.getClass().getName());
mv.visitTypeInsn(NEW, className);
mv.visitInsn(DUP);
mv.visitLdcInsn(value.toString());
mv.visitMethodInsn(INVOKESPECIAL, className, "<init>", "(Ljava/lang/String;)V", false);
} else if (value instanceof BigInteger) {
String className = BytecodeHelper.getClassInternalName(value.getClass().getName());
mv.visitTypeInsn(NEW, className);
mv.visitInsn(DUP);
mv.visitLdcInsn(value.toString());
mv.visitMethodInsn(INVOKESPECIAL, className, "<init>", "(Ljava/lang/String;)V", false);
} else if (value instanceof String) {
mv.visitLdcInsn(value);
} else {
throw new ClassGeneratorException(
"Cannot generate bytecode for constant: " + value + " of type: " + type.getName());
}
push(type);
if (boxing) box();
}
public ClassNode box() {
MethodVisitor mv = controller.getMethodVisitor();
int size = stack.size();
ClassNode type = stack.get(size - 1);
if (ClassHelper.isPrimitiveType(type) && ClassHelper.VOID_TYPE != type) {
ClassNode wrapper = ClassHelper.getWrapper(type);
BytecodeHelper.doCastToWrappedType(mv, type, wrapper);
type = wrapper;
} // else nothing to box
stack.set(size - 1, type);
return type;
}
/** Generates the bytecode to unbox the current value on the stack */
public static void unbox(MethodVisitor mv, Class type) {
if (type.isPrimitive() && type != Void.TYPE) {
String returnString = "(Ljava/lang/Object;)" + BytecodeHelper.getTypeDescription(type);
mv.visitMethodInsn(INVOKESTATIC, DTT_CLASSNAME, type.getName() + "Unbox", returnString);
}
}
/** * A helper class for bytecode generation with AsmClassGenerator. * * @author <a href="mailto:[email protected]">James Strachan</a> * @author <a href="mailto:[email protected]">Bing Ran</a> * @author <a href="mailto:[email protected]">Jochen Theodorou</a> * @version $Revision$ */ public class BytecodeHelper implements Opcodes { private static String DTT_CLASSNAME = BytecodeHelper.getClassInternalName(DefaultTypeTransformation.class.getName()); public static String getClassInternalName(ClassNode t) { if (t.isPrimaryClassNode()) { if (t.isArray()) return "[L" + getClassInternalName(t.getComponentType()) + ";"; return getClassInternalName(t.getName()); } return getClassInternalName(t.getTypeClass()); } public static String getClassInternalName(Class t) { return org.objectweb.asm.Type.getInternalName(t); } /** @return the ASM internal name of the type */ public static String getClassInternalName(String name) { return name.replace('.', '/'); } public static String getMethodDescriptor(ClassNode returnType, Parameter[] parameters) { StringBuffer buffer = new StringBuffer("("); for (int i = 0; i < parameters.length; i++) { buffer.append(getTypeDescription(parameters[i].getType())); } buffer.append(")"); buffer.append(getTypeDescription(returnType)); return buffer.toString(); } /** * Returns a method descriptor for the given {@link org.codehaus.groovy.ast.MethodNode}. * * @param methodNode the method node for which to create the descriptor * @return a method descriptor as defined in section JVMS section 4.3.3 */ public static String getMethodDescriptor(MethodNode methodNode) { return getMethodDescriptor(methodNode.getReturnType(), methodNode.getParameters()); } /** @return the ASM method type descriptor */ public static String getMethodDescriptor(Class returnType, Class[] paramTypes) { // lets avoid class loading StringBuffer buffer = new StringBuffer("("); for (int i = 0; i < paramTypes.length; i++) { buffer.append(getTypeDescription(paramTypes[i])); } buffer.append(")"); buffer.append(getTypeDescription(returnType)); return buffer.toString(); } public static String getTypeDescription(Class c) { return org.objectweb.asm.Type.getDescriptor(c); } /** * array types are special: eg.: String[]: classname: [Ljava.lang.String; Object: classname: * java.lang.Object int[] : classname: [I unlike getTypeDescription '.' is not replaced by '/'. it * seems that makes problems for the class loading if '.' is replaced by '/' * * @return the ASM type description for class loading */ public static String getClassLoadingTypeDescription(ClassNode c) { StringBuffer buf = new StringBuffer(); boolean array = false; while (true) { if (c.isArray()) { buf.append('['); c = c.getComponentType(); array = true; } else { if (ClassHelper.isPrimitiveType(c)) { buf.append(getTypeDescription(c)); } else { if (array) buf.append('L'); buf.append(c.getName()); if (array) buf.append(';'); } return buf.toString(); } } } /** * array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I * * @return the ASM type description */ public static String getTypeDescription(ClassNode c) { return getTypeDescription(c, true); } /** * array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I * * @return the ASM type description */ private static String getTypeDescription(ClassNode c, boolean end) { StringBuffer buf = new StringBuffer(); ClassNode d = c; while (true) { if (ClassHelper.isPrimitiveType(d)) { char car; if (d == ClassHelper.int_TYPE) { car = 'I'; } else if (d == ClassHelper.VOID_TYPE) { car = 'V'; } else if (d == ClassHelper.boolean_TYPE) { car = 'Z'; } else if (d == ClassHelper.byte_TYPE) { car = 'B'; } else if (d == ClassHelper.char_TYPE) { car = 'C'; } else if (d == ClassHelper.short_TYPE) { car = 'S'; } else if (d == ClassHelper.double_TYPE) { car = 'D'; } else if (d == ClassHelper.float_TYPE) { car = 'F'; } else /* long */ { car = 'J'; } buf.append(car); return buf.toString(); } else if (d.isArray()) { buf.append('['); d = d.getComponentType(); } else { buf.append('L'); String name = d.getName(); int len = name.length(); for (int i = 0; i < len; ++i) { char car = name.charAt(i); buf.append(car == '.' ? '/' : car); } if (end) buf.append(';'); return buf.toString(); } } } /** @return an array of ASM internal names of the type */ public static String[] getClassInternalNames(ClassNode[] names) { int size = names.length; String[] answer = new String[size]; for (int i = 0; i < size; i++) { answer[i] = getClassInternalName(names[i]); } return answer; } public static void pushConstant(MethodVisitor mv, int value) { switch (value) { case 0: mv.visitInsn(ICONST_0); break; case 1: mv.visitInsn(ICONST_1); break; case 2: mv.visitInsn(ICONST_2); break; case 3: mv.visitInsn(ICONST_3); break; case 4: mv.visitInsn(ICONST_4); break; case 5: mv.visitInsn(ICONST_5); break; default: if (value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE) { mv.visitIntInsn(BIPUSH, value); } else if (value >= Short.MIN_VALUE && value <= Short.MAX_VALUE) { mv.visitIntInsn(SIPUSH, value); } else { mv.visitLdcInsn(Integer.valueOf(value)); } } } /** negate a boolean on stack. true->false, false->true */ public static void negateBoolean(MethodVisitor mv) { // code to negate the primitive boolean Label endLabel = new Label(); Label falseLabel = new Label(); mv.visitJumpInsn(IFNE, falseLabel); mv.visitInsn(ICONST_1); mv.visitJumpInsn(GOTO, endLabel); mv.visitLabel(falseLabel); mv.visitInsn(ICONST_0); mv.visitLabel(endLabel); } /** * load a message on the stack and remove it right away. Good for put a mark in the generated * bytecode for debugging purpose. * * @param msg */ /*public void mark(String msg) { mv.visitLdcInsn(msg); mv.visitInsn(POP); }*/ /** * returns a name that Class.forName() can take. Notably for arrays: [I, [Ljava.lang.String; etc * Regular object type: java.lang.String * * @param name */ public static String formatNameForClassLoading(String name) { if (name.equals("int") || name.equals("long") || name.equals("short") || name.equals("float") || name.equals("double") || name.equals("byte") || name.equals("char") || name.equals("boolean") || name.equals("void")) { return name; } if (name == null) { return "java.lang.Object;"; } if (name.startsWith("[")) { return name.replace('/', '.'); } if (name.startsWith("L")) { name = name.substring(1); if (name.endsWith(";")) { name = name.substring(0, name.length() - 1); } return name.replace('/', '.'); } String prefix = ""; if (name.endsWith("[]")) { // todo need process multi prefix = "["; name = name.substring(0, name.length() - 2); if (name.equals("int")) { return prefix + "I"; } else if (name.equals("long")) { return prefix + "J"; } else if (name.equals("short")) { return prefix + "S"; } else if (name.equals("float")) { return prefix + "F"; } else if (name.equals("double")) { return prefix + "D"; } else if (name.equals("byte")) { return prefix + "B"; } else if (name.equals("char")) { return prefix + "C"; } else if (name.equals("boolean")) { return prefix + "Z"; } else { return prefix + "L" + name.replace('/', '.') + ";"; } } return name.replace('/', '.'); } /*public void dup() { mv.visitInsn(DUP); }*/ public static void doReturn(MethodVisitor mv, ClassNode returnType) { if (returnType == ClassHelper.double_TYPE) { mv.visitInsn(DRETURN); } else if (returnType == ClassHelper.float_TYPE) { mv.visitInsn(FRETURN); } else if (returnType == ClassHelper.long_TYPE) { mv.visitInsn(LRETURN); } else if (returnType == ClassHelper.boolean_TYPE || returnType == ClassHelper.char_TYPE || returnType == ClassHelper.byte_TYPE || returnType == ClassHelper.int_TYPE || returnType == ClassHelper.short_TYPE) { // byte,short,boolean,int are all IRETURN mv.visitInsn(IRETURN); } else if (returnType == ClassHelper.VOID_TYPE) { mv.visitInsn(RETURN); } else { mv.visitInsn(ARETURN); } } private static boolean hasGenerics(Parameter[] param) { if (param.length == 0) return false; for (int i = 0; i < param.length; i++) { ClassNode type = param[i].getType(); if (hasGenerics(type)) return true; } return false; } private static boolean hasGenerics(ClassNode type) { return type.isArray() ? hasGenerics(type.getComponentType()) : type.getGenericsTypes() != null; } public static String getGenericsMethodSignature(MethodNode node) { GenericsType[] generics = node.getGenericsTypes(); Parameter[] param = node.getParameters(); ClassNode returnType = node.getReturnType(); if (generics == null && !hasGenerics(param) && !hasGenerics(returnType)) return null; StringBuffer ret = new StringBuffer(100); getGenericsTypeSpec(ret, generics); GenericsType[] paramTypes = new GenericsType[param.length]; for (int i = 0; i < param.length; i++) { ClassNode pType = param[i].getType(); if (pType.getGenericsTypes() == null || !pType.isGenericsPlaceHolder()) { paramTypes[i] = new GenericsType(pType); } else { paramTypes[i] = pType.getGenericsTypes()[0]; } } addSubTypes(ret, paramTypes, "(", ")"); addSubTypes(ret, new GenericsType[] {new GenericsType(returnType)}, "", ""); return ret.toString(); } private static boolean usesGenericsInClassSignature(ClassNode node) { if (!node.isUsingGenerics()) return false; if (hasGenerics(node)) return true; ClassNode sclass = node.getUnresolvedSuperClass(false); if (sclass.isUsingGenerics()) return true; ClassNode[] interfaces = node.getInterfaces(); if (interfaces != null) { for (int i = 0; i < interfaces.length; i++) { if (interfaces[i].isUsingGenerics()) return true; } } return false; } public static String getGenericsSignature(ClassNode node) { if (!usesGenericsInClassSignature(node)) return null; GenericsType[] genericsTypes = node.getGenericsTypes(); StringBuffer ret = new StringBuffer(100); getGenericsTypeSpec(ret, genericsTypes); GenericsType extendsPart = new GenericsType(node.getUnresolvedSuperClass(false)); writeGenericsBounds(ret, extendsPart, true); ClassNode[] interfaces = node.getInterfaces(); for (int i = 0; i < interfaces.length; i++) { GenericsType interfacePart = new GenericsType(interfaces[i]); writeGenericsBounds(ret, interfacePart, false); } return ret.toString(); } private static void getGenericsTypeSpec(StringBuffer ret, GenericsType[] genericsTypes) { if (genericsTypes == null) return; ret.append('<'); for (int i = 0; i < genericsTypes.length; i++) { String name = genericsTypes[i].getName(); ret.append(name); ret.append(':'); writeGenericsBounds(ret, genericsTypes[i], true); } ret.append('>'); } public static String getGenericsBounds(ClassNode type) { GenericsType[] genericsTypes = type.getGenericsTypes(); if (genericsTypes == null) return null; StringBuffer ret = new StringBuffer(100); if (type.isGenericsPlaceHolder()) { addSubTypes(ret, type.getGenericsTypes(), "", ""); } else { GenericsType gt = new GenericsType(type); writeGenericsBounds(ret, gt, false); } return ret.toString(); } private static void writeGenericsBoundType( StringBuffer ret, ClassNode printType, boolean writeInterfaceMarker) { if (writeInterfaceMarker && printType.isInterface()) ret.append(":"); if (printType.equals(ClassHelper.OBJECT_TYPE) && printType.getGenericsTypes() != null) { ret.append("T"); ret.append(printType.getGenericsTypes()[0].getName()); ret.append(";"); } else { ret.append(getTypeDescription(printType, false)); addSubTypes(ret, printType.getGenericsTypes(), "<", ">"); if (!ClassHelper.isPrimitiveType(printType)) ret.append(";"); } } private static void writeGenericsBounds( StringBuffer ret, GenericsType type, boolean writeInterfaceMarker) { if (type.getUpperBounds() != null) { ClassNode[] bounds = type.getUpperBounds(); for (int i = 0; i < bounds.length; i++) { writeGenericsBoundType(ret, bounds[i], writeInterfaceMarker); } } else if (type.getLowerBound() != null) { writeGenericsBoundType(ret, type.getLowerBound(), writeInterfaceMarker); } else { writeGenericsBoundType(ret, type.getType(), writeInterfaceMarker); } } private static void addSubTypes( StringBuffer ret, GenericsType[] types, String start, String end) { if (types == null) return; ret.append(start); for (int i = 0; i < types.length; i++) { if (types[i].getType().isArray()) { ret.append("["); addSubTypes( ret, new GenericsType[] {new GenericsType(types[i].getType().getComponentType())}, "", ""); } else { if (types[i].isPlaceholder()) { ret.append('T'); String name = types[i].getName(); ret.append(name); ret.append(';'); } else if (types[i].isWildcard()) { if (types[i].getUpperBounds() != null) { ret.append('+'); writeGenericsBounds(ret, types[i], false); } else if (types[i].getLowerBound() != null) { ret.append('-'); writeGenericsBounds(ret, types[i], false); } else { ret.append('*'); } } else { writeGenericsBounds(ret, types[i], false); } } } ret.append(end); } public static void load(MethodVisitor mv, ClassNode type, int idx) { if (type == ClassHelper.double_TYPE) { mv.visitVarInsn(DLOAD, idx); } else if (type == ClassHelper.float_TYPE) { mv.visitVarInsn(FLOAD, idx); } else if (type == ClassHelper.long_TYPE) { mv.visitVarInsn(LLOAD, idx); } else if (type == ClassHelper.boolean_TYPE || type == ClassHelper.char_TYPE || type == ClassHelper.byte_TYPE || type == ClassHelper.int_TYPE || type == ClassHelper.short_TYPE) { mv.visitVarInsn(ILOAD, idx); } else { mv.visitVarInsn(ALOAD, idx); } } public static void doCast(MethodVisitor mv, ClassNode type) { if (type == ClassHelper.OBJECT_TYPE) return; if (ClassHelper.isPrimitiveType(type) && type != ClassHelper.VOID_TYPE) { unbox(mv, type); } else { mv.visitTypeInsn( CHECKCAST, type.isArray() ? BytecodeHelper.getTypeDescription(type) : BytecodeHelper.getClassInternalName(type.getName())); } } /** * Given a wrapped number type (Byte, Integer, Short, ...), generates bytecode to convert it to a * primitive number (int, long, double) using calls to wrapped.[targetType]Value() * * @param mv method visitor * @param sourceType the wrapped number type * @param targetType the primitive target type */ public static void doCastToPrimitive( MethodVisitor mv, ClassNode sourceType, ClassNode targetType) { mv.visitMethodInsn( INVOKEVIRTUAL, BytecodeHelper.getClassInternalName(sourceType), targetType.getName() + "Value", "()" + BytecodeHelper.getTypeDescription(targetType)); } /** * Given a primitive number type (byte, integer, short, ...), generates bytecode to convert it to * a wrapped number (Integer, Long, Double) using calls to [WrappedType].valueOf * * @param mv method visitor * @param sourceType the primitive number type * @param targetType the wrapped target type */ public static void doCastToWrappedType( MethodVisitor mv, ClassNode sourceType, ClassNode targetType) { mv.visitMethodInsn( INVOKESTATIC, getClassInternalName(targetType), "valueOf", "(" + getTypeDescription(sourceType) + ")" + getTypeDescription(targetType)); } public static void doCast(MethodVisitor mv, Class type) { if (type == Object.class) return; if (type.isPrimitive() && type != Void.TYPE) { unbox(mv, type); } else { mv.visitTypeInsn( CHECKCAST, type.isArray() ? BytecodeHelper.getTypeDescription(type) : BytecodeHelper.getClassInternalName(type.getName())); } } /** Generates the bytecode to unbox the current value on the stack */ public static void unbox(MethodVisitor mv, Class type) { if (type.isPrimitive() && type != Void.TYPE) { String returnString = "(Ljava/lang/Object;)" + BytecodeHelper.getTypeDescription(type); mv.visitMethodInsn(INVOKESTATIC, DTT_CLASSNAME, type.getName() + "Unbox", returnString); } } public static void unbox(MethodVisitor mv, ClassNode type) { if (type.isPrimaryClassNode()) return; unbox(mv, type.getTypeClass()); } /** box top level operand */ public static boolean box(MethodVisitor mv, ClassNode type) { if (type.isPrimaryClassNode()) return false; return box(mv, type.getTypeClass()); } /** Generates the bytecode to autobox the current value on the stack */ public static boolean box(MethodVisitor mv, Class type) { if (ReflectionCache.getCachedClass(type).isPrimitive && type != void.class) { String returnString = "(" + BytecodeHelper.getTypeDescription(type) + ")Ljava/lang/Object;"; mv.visitMethodInsn(INVOKESTATIC, DTT_CLASSNAME, "box", returnString); return true; } return false; } /** * Visits a class literal. If the type of the classnode is a primitive type, the generated * bytecode will be a GETSTATIC Integer.TYPE. If the classnode is not a primitive type, we will * generate a LDC instruction. */ public static void visitClassLiteral(MethodVisitor mv, ClassNode classNode) { if (ClassHelper.isPrimitiveType(classNode)) { mv.visitFieldInsn( GETSTATIC, getClassInternalName(ClassHelper.getWrapper(classNode)), "TYPE", "Ljava/lang/Class;"); } else { mv.visitLdcInsn(org.objectweb.asm.Type.getType(getTypeDescription(classNode))); } } /** * Tells if a class node is candidate for class literal bytecode optimization. If so, bytecode may * use LDC instructions instead of static constant Class fields to retrieve class literals. * * @param classNode the classnode for which we want to know if bytecode optimization is possible * @return true if the bytecode can be optimized */ public static boolean isClassLiteralPossible(ClassNode classNode) { // the current implementation only checks for public modifier, because Groovy used to allow // handles on classes even if they are package protected and not in the same package. // There are situations where we could make more fine grained checks, but be careful of // potential breakage of existing code. return Modifier.isPublic(classNode.getModifiers()); } /** * Returns true if the two classes share the same compilation unit. * * @param a class a * @param b class b * @return true if both classes share the same compilation unit */ public static boolean isSameCompilationUnit(ClassNode a, ClassNode b) { CompileUnit cu1 = a.getCompileUnit(); CompileUnit cu2 = b.getCompileUnit(); return cu1 != null && cu2 != null && cu1 == cu2; } }
@Override
public void makeGetPropertySite(
Expression receiver,
final String methodName,
final boolean safe,
final boolean implicitThis) {
Object dynamic =
receiver.getNodeMetaData(StaticCompilationMetadataKeys.RECEIVER_OF_DYNAMIC_PROPERTY);
if (dynamic != null) {
MethodNode target =
safe ? INVOKERHELPER_GETPROPERTYSAFE_METHOD : INVOKERHELPER_GETPROPERTY_METHOD;
MethodCallExpression mce =
new MethodCallExpression(
new ClassExpression(INVOKERHELPER_TYPE),
target.getName(),
new ArgumentListExpression(receiver, new ConstantExpression(methodName)));
mce.setSafe(false);
mce.setImplicitThis(false);
mce.setMethodTarget(target);
mce.visit(controller.getAcg());
return;
}
TypeChooser typeChooser = controller.getTypeChooser();
ClassNode classNode = controller.getClassNode();
ClassNode receiverType =
(ClassNode) receiver.getNodeMetaData(StaticCompilationMetadataKeys.PROPERTY_OWNER);
if (receiverType == null) {
receiverType = typeChooser.resolveType(receiver, classNode);
}
Object type = receiver.getNodeMetaData(StaticTypesMarker.INFERRED_TYPE);
if (type == null && receiver instanceof VariableExpression) {
Variable variable = ((VariableExpression) receiver).getAccessedVariable();
if (variable instanceof Expression) {
type = ((Expression) variable).getNodeMetaData(StaticTypesMarker.INFERRED_TYPE);
}
}
if (type != null) {
// in case a "flow type" is found, it is preferred to use it instead of
// the declaration type
receiverType = (ClassNode) type;
}
boolean isClassReceiver = false;
if (isClassClassNodeWrappingConcreteType(receiverType)) {
isClassReceiver = true;
receiverType = receiverType.getGenericsTypes()[0].getType();
}
MethodVisitor mv = controller.getMethodVisitor();
if (receiverType.isArray() && methodName.equals("length")) {
receiver.visit(controller.getAcg());
ClassNode arrayGetReturnType = typeChooser.resolveType(receiver, classNode);
controller.getOperandStack().doGroovyCast(arrayGetReturnType);
mv.visitInsn(ARRAYLENGTH);
controller.getOperandStack().replace(int_TYPE);
return;
} else if ((receiverType.implementsInterface(COLLECTION_TYPE)
|| COLLECTION_TYPE.equals(receiverType))
&& ("size".equals(methodName) || "length".equals(methodName))) {
MethodCallExpression expr =
new MethodCallExpression(receiver, "size", ArgumentListExpression.EMPTY_ARGUMENTS);
expr.setMethodTarget(COLLECTION_SIZE_METHOD);
expr.setImplicitThis(implicitThis);
expr.setSafe(safe);
expr.visit(controller.getAcg());
return;
}
if (makeGetPropertyWithGetter(receiver, receiverType, methodName, safe, implicitThis)) return;
if (makeGetField(
receiver,
receiverType,
methodName,
implicitThis,
samePackages(receiverType.getPackageName(), classNode.getPackageName()))) return;
if (receiverType.isEnum()) {
mv.visitFieldInsn(
GETSTATIC,
BytecodeHelper.getClassInternalName(receiverType),
methodName,
BytecodeHelper.getTypeDescription(receiverType));
controller.getOperandStack().push(receiverType);
return;
}
if (receiver instanceof ClassExpression) {
if (makeGetField(
receiver,
receiver.getType(),
methodName,
implicitThis,
samePackages(receiver.getType().getPackageName(), classNode.getPackageName()))) return;
if (makeGetPropertyWithGetter(receiver, receiver.getType(), methodName, safe, implicitThis))
return;
if (makeGetPrivateFieldWithBridgeMethod(
receiver, receiver.getType(), methodName, safe, implicitThis)) return;
}
if (isClassReceiver) {
// we are probably looking for a property of the class
if (makeGetPropertyWithGetter(receiver, CLASS_Type, methodName, safe, implicitThis)) return;
if (makeGetField(receiver, CLASS_Type, methodName, false, true)) return;
}
if (makeGetPrivateFieldWithBridgeMethod(receiver, receiverType, methodName, safe, implicitThis))
return;
// GROOVY-5580, it is still possible that we're calling a superinterface property
String getterName = "get" + MetaClassHelper.capitalize(methodName);
if (receiverType.isInterface()) {
Set<ClassNode> allInterfaces = receiverType.getAllInterfaces();
MethodNode getterMethod = null;
for (ClassNode anInterface : allInterfaces) {
getterMethod = anInterface.getGetterMethod(getterName);
if (getterMethod != null) break;
}
// GROOVY-5585
if (getterMethod == null) {
getterMethod = OBJECT_TYPE.getGetterMethod(getterName);
}
if (getterMethod != null) {
MethodCallExpression call =
new MethodCallExpression(receiver, getterName, ArgumentListExpression.EMPTY_ARGUMENTS);
call.setMethodTarget(getterMethod);
call.setImplicitThis(false);
call.setSourcePosition(receiver);
call.visit(controller.getAcg());
return;
}
}
// GROOVY-5568, we would be facing a DGM call, but instead of foo.getText(), have foo.text
List<MethodNode> methods =
findDGMMethodsByNameAndArguments(
controller.getSourceUnit().getClassLoader(),
receiverType,
getterName,
ClassNode.EMPTY_ARRAY);
if (!methods.isEmpty()) {
List<MethodNode> methodNodes = chooseBestMethod(receiverType, methods, ClassNode.EMPTY_ARRAY);
if (methodNodes.size() == 1) {
MethodNode getter = methodNodes.get(0);
MethodCallExpression call =
new MethodCallExpression(receiver, getterName, ArgumentListExpression.EMPTY_ARGUMENTS);
call.setMethodTarget(getter);
call.setImplicitThis(false);
call.setSourcePosition(receiver);
call.visit(controller.getAcg());
return;
}
}
boolean isStaticProperty =
receiver instanceof ClassExpression
&& (receiverType.isDerivedFrom(receiver.getType())
|| receiverType.implementsInterface(receiver.getType()));
if (!isStaticProperty) {
if (receiverType.implementsInterface(MAP_TYPE) || MAP_TYPE.equals(receiverType)) {
// for maps, replace map.foo with map.get('foo')
writeMapDotProperty(receiver, methodName, mv, safe);
return;
}
if (receiverType.implementsInterface(LIST_TYPE) || LIST_TYPE.equals(receiverType)) {
writeListDotProperty(receiver, methodName, mv, safe);
return;
}
}
controller
.getSourceUnit()
.addError(
new SyntaxException(
"Access to "
+ (receiver instanceof ClassExpression ? receiver.getType() : receiverType)
.toString(false)
+ "#"
+ methodName
+ " is forbidden",
receiver.getLineNumber(),
receiver.getColumnNumber(),
receiver.getLastLineNumber(),
receiver.getLastColumnNumber()));
controller.getMethodVisitor().visitInsn(ACONST_NULL);
controller.getOperandStack().push(OBJECT_TYPE);
}
private void writeListDotProperty(
final Expression receiver,
final String methodName,
final MethodVisitor mv,
final boolean safe) {
ClassNode componentType =
(ClassNode) receiver.getNodeMetaData(StaticCompilationMetadataKeys.COMPONENT_TYPE);
if (componentType == null) {
componentType = OBJECT_TYPE;
}
// for lists, replace list.foo with:
// def result = new ArrayList(list.size())
// for (e in list) { result.add (e.foo) }
// result
CompileStack compileStack = controller.getCompileStack();
Label exit = new Label();
if (safe) {
receiver.visit(controller.getAcg());
Label doGet = new Label();
mv.visitJumpInsn(IFNONNULL, doGet);
controller.getOperandStack().remove(1);
mv.visitInsn(ACONST_NULL);
mv.visitJumpInsn(GOTO, exit);
mv.visitLabel(doGet);
}
Variable tmpList = new VariableExpression("tmpList", make(ArrayList.class));
int var = compileStack.defineTemporaryVariable(tmpList, false);
Variable iterator = new VariableExpression("iterator", Iterator_TYPE);
int it = compileStack.defineTemporaryVariable(iterator, false);
Variable nextVar = new VariableExpression("next", componentType);
final int next = compileStack.defineTemporaryVariable(nextVar, false);
mv.visitTypeInsn(NEW, "java/util/ArrayList");
mv.visitInsn(DUP);
receiver.visit(controller.getAcg());
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "size", "()I", true);
controller.getOperandStack().remove(1);
mv.visitMethodInsn(INVOKESPECIAL, "java/util/ArrayList", "<init>", "(I)V", false);
mv.visitVarInsn(ASTORE, var);
Label l1 = new Label();
mv.visitLabel(l1);
receiver.visit(controller.getAcg());
mv.visitMethodInsn(
INVOKEINTERFACE, "java/util/List", "iterator", "()Ljava/util/Iterator;", true);
controller.getOperandStack().remove(1);
mv.visitVarInsn(ASTORE, it);
Label l2 = new Label();
mv.visitLabel(l2);
mv.visitVarInsn(ALOAD, it);
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z", true);
Label l3 = new Label();
mv.visitJumpInsn(IFEQ, l3);
mv.visitVarInsn(ALOAD, it);
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;", true);
mv.visitTypeInsn(CHECKCAST, BytecodeHelper.getClassInternalName(componentType));
mv.visitVarInsn(ASTORE, next);
Label l4 = new Label();
mv.visitLabel(l4);
mv.visitVarInsn(ALOAD, var);
final ClassNode finalComponentType = componentType;
PropertyExpression pexp =
new PropertyExpression(
new BytecodeExpression() {
@Override
public void visit(final MethodVisitor mv) {
mv.visitVarInsn(ALOAD, next);
}
@Override
public ClassNode getType() {
return finalComponentType;
}
},
methodName);
pexp.visit(controller.getAcg());
controller.getOperandStack().box();
controller.getOperandStack().remove(1);
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "add", "(Ljava/lang/Object;)Z", true);
mv.visitInsn(POP);
Label l5 = new Label();
mv.visitLabel(l5);
mv.visitJumpInsn(GOTO, l2);
mv.visitLabel(l3);
mv.visitVarInsn(ALOAD, var);
if (safe) {
mv.visitLabel(exit);
}
controller.getOperandStack().push(make(ArrayList.class));
controller.getCompileStack().removeVar(next);
controller.getCompileStack().removeVar(it);
controller.getCompileStack().removeVar(var);
}
/** * A helper class for bytecode generation with AsmClassGenerator. * * @author <a href="mailto:[email protected]">James Strachan</a> * @author <a href="mailto:[email protected]">Bing Ran</a> * @author <a href="mailto:[email protected]">Jochen Theodorou</a> * @version $Revision$ */ public class BytecodeHelper implements Opcodes { private static String DTT_CLASSNAME = BytecodeHelper.getClassInternalName(DefaultTypeTransformation.class.getName()); public static String getClassInternalName(ClassNode t) { if (t.isPrimaryClassNode()) { return getClassInternalName(t.getName()); } return getClassInternalName(t.getTypeClass()); } public static String getClassInternalName(Class t) { return org.objectweb.asm.Type.getInternalName(t); } /** @return the ASM internal name of the type */ public static String getClassInternalName(String name) { return name.replace('.', '/'); } public static String getMethodDescriptor(ClassNode returnType, Parameter[] parameters) { StringBuffer buffer = new StringBuffer("("); for (int i = 0; i < parameters.length; i++) { buffer.append(getTypeDescription(parameters[i].getType())); } buffer.append(")"); buffer.append(getTypeDescription(returnType)); return buffer.toString(); } /** @return the ASM method type descriptor */ public static String getMethodDescriptor(Class returnType, Class[] paramTypes) { // lets avoid class loading StringBuffer buffer = new StringBuffer("("); for (int i = 0; i < paramTypes.length; i++) { buffer.append(getTypeDescription(paramTypes[i])); } buffer.append(")"); buffer.append(getTypeDescription(returnType)); return buffer.toString(); } public static String getTypeDescription(Class c) { return org.objectweb.asm.Type.getDescriptor(c); } /** * array types are special: eg.: String[]: classname: [Ljava.lang.String; Object: classname: * java.lang.Object int[] : classname: [I unlike getTypeDescription '.' is not replaced by '/'. it * seems that makes problems for the class loading if '.' is replaced by '/' * * @return the ASM type description for class loading */ public static String getClassLoadingTypeDescription(ClassNode c) { StringBuffer buf = new StringBuffer(); boolean array = false; while (true) { if (c.isArray()) { buf.append('['); c = c.getComponentType(); array = true; } else { if (ClassHelper.isPrimitiveType(c)) { buf.append(getTypeDescription(c)); } else { if (array) buf.append('L'); buf.append(c.getName()); if (array) buf.append(';'); } return buf.toString(); } } } /** * array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I * * @return the ASM type description */ public static String getTypeDescription(ClassNode c) { return getTypeDescription(c, true); } /** * array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I * * @return the ASM type description */ private static String getTypeDescription(ClassNode c, boolean end) { StringBuffer buf = new StringBuffer(); ClassNode d = c; while (true) { if (ClassHelper.isPrimitiveType(d)) { char car; if (d == ClassHelper.int_TYPE) { car = 'I'; } else if (d == ClassHelper.VOID_TYPE) { car = 'V'; } else if (d == ClassHelper.boolean_TYPE) { car = 'Z'; } else if (d == ClassHelper.byte_TYPE) { car = 'B'; } else if (d == ClassHelper.char_TYPE) { car = 'C'; } else if (d == ClassHelper.short_TYPE) { car = 'S'; } else if (d == ClassHelper.double_TYPE) { car = 'D'; } else if (d == ClassHelper.float_TYPE) { car = 'F'; } else /* long */ { car = 'J'; } buf.append(car); return buf.toString(); } else if (d.isArray()) { buf.append('['); d = d.getComponentType(); } else { buf.append('L'); String name = d.getName(); int len = name.length(); for (int i = 0; i < len; ++i) { char car = name.charAt(i); buf.append(car == '.' ? '/' : car); } if (end) buf.append(';'); return buf.toString(); } } } /** @return an array of ASM internal names of the type */ public static String[] getClassInternalNames(ClassNode[] names) { int size = names.length; String[] answer = new String[size]; for (int i = 0; i < size; i++) { answer[i] = getClassInternalName(names[i]); } return answer; } public static void pushConstant(MethodVisitor mv, int value) { switch (value) { case 0: mv.visitInsn(ICONST_0); break; case 1: mv.visitInsn(ICONST_1); break; case 2: mv.visitInsn(ICONST_2); break; case 3: mv.visitInsn(ICONST_3); break; case 4: mv.visitInsn(ICONST_4); break; case 5: mv.visitInsn(ICONST_5); break; default: if (value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE) { mv.visitIntInsn(BIPUSH, value); } else if (value >= Short.MIN_VALUE && value <= Short.MAX_VALUE) { mv.visitIntInsn(SIPUSH, value); } else { mv.visitLdcInsn(Integer.valueOf(value)); } } } /** negate a boolean on stack. true->false, false->true */ public static void negateBoolean(MethodVisitor mv) { // code to negate the primitive boolean Label endLabel = new Label(); Label falseLabel = new Label(); mv.visitJumpInsn(IFNE, falseLabel); mv.visitInsn(ICONST_1); mv.visitJumpInsn(GOTO, endLabel); mv.visitLabel(falseLabel); mv.visitInsn(ICONST_0); mv.visitLabel(endLabel); } /** * load a message on the stack and remove it right away. Good for put a mark in the generated * bytecode for debugging purpose. * * @param msg */ /*public void mark(String msg) { mv.visitLdcInsn(msg); mv.visitInsn(POP); }*/ /** * returns a name that Class.forName() can take. Notably for arrays: [I, [Ljava.lang.String; etc * Regular object type: java.lang.String * * @param name */ public static String formatNameForClassLoading(String name) { if (name.equals("int") || name.equals("long") || name.equals("short") || name.equals("float") || name.equals("double") || name.equals("byte") || name.equals("char") || name.equals("boolean") || name.equals("void")) { return name; } if (name == null) { return "java.lang.Object;"; } if (name.startsWith("[")) { return name.replace('/', '.'); } if (name.startsWith("L")) { name = name.substring(1); if (name.endsWith(";")) { name = name.substring(0, name.length() - 1); } return name.replace('/', '.'); } String prefix = ""; if (name.endsWith("[]")) { // todo need process multi prefix = "["; name = name.substring(0, name.length() - 2); if (name.equals("int")) { return prefix + "I"; } else if (name.equals("long")) { return prefix + "J"; } else if (name.equals("short")) { return prefix + "S"; } else if (name.equals("float")) { return prefix + "F"; } else if (name.equals("double")) { return prefix + "D"; } else if (name.equals("byte")) { return prefix + "B"; } else if (name.equals("char")) { return prefix + "C"; } else if (name.equals("boolean")) { return prefix + "Z"; } else { return prefix + "L" + name.replace('/', '.') + ";"; } } return name.replace('/', '.'); } /*public void dup() { mv.visitInsn(DUP); }*/ public static void doReturn(MethodVisitor mv, ClassNode returnType) { if (returnType == ClassHelper.double_TYPE) { mv.visitInsn(DRETURN); } else if (returnType == ClassHelper.float_TYPE) { mv.visitInsn(FRETURN); } else if (returnType == ClassHelper.long_TYPE) { mv.visitInsn(LRETURN); } else if (returnType == ClassHelper.boolean_TYPE || returnType == ClassHelper.char_TYPE || returnType == ClassHelper.byte_TYPE || returnType == ClassHelper.int_TYPE || returnType == ClassHelper.short_TYPE) { // byte,short,boolean,int are all IRETURN mv.visitInsn(IRETURN); } else if (returnType == ClassHelper.VOID_TYPE) { mv.visitInsn(RETURN); } else { mv.visitInsn(ARETURN); } } private static boolean hasGenerics(Parameter[] param) { if (param.length == 0) return false; for (int i = 0; i < param.length; i++) { ClassNode type = param[i].getType(); if (hasGenerics(type)) return true; } return false; } private static boolean hasGenerics(ClassNode type) { return type.isArray() ? hasGenerics(type.getComponentType()) : type.getGenericsTypes() != null; } public static String getGenericsMethodSignature(MethodNode node) { GenericsType[] generics = node.getGenericsTypes(); Parameter[] param = node.getParameters(); ClassNode returnType = node.getReturnType(); if (generics == null && !hasGenerics(param) && !hasGenerics(returnType)) return null; StringBuffer ret = new StringBuffer(100); getGenericsTypeSpec(ret, generics); GenericsType[] paramTypes = new GenericsType[param.length]; for (int i = 0; i < param.length; i++) { ClassNode pType = param[i].getType(); if (pType.getGenericsTypes() == null || !pType.isGenericsPlaceHolder()) { paramTypes[i] = new GenericsType(pType); } else { paramTypes[i] = pType.getGenericsTypes()[0]; } } addSubTypes(ret, paramTypes, "(", ")"); addSubTypes(ret, new GenericsType[] {new GenericsType(returnType)}, "", ""); return ret.toString(); } private static boolean usesGenericsInClassSignature(ClassNode node) { if (!node.isUsingGenerics()) return false; if (hasGenerics(node)) return true; ClassNode sclass = node.getUnresolvedSuperClass(false); if (sclass.isUsingGenerics()) return true; ClassNode[] interfaces = node.getInterfaces(); if (interfaces != null) { for (int i = 0; i < interfaces.length; i++) { if (interfaces[i].isUsingGenerics()) return true; } } return false; } public static String getGenericsSignature(ClassNode node) { if (!usesGenericsInClassSignature(node)) return null; GenericsType[] genericsTypes = node.getGenericsTypes(); StringBuffer ret = new StringBuffer(100); getGenericsTypeSpec(ret, genericsTypes); GenericsType extendsPart = new GenericsType(node.getUnresolvedSuperClass(false)); writeGenericsBounds(ret, extendsPart, true); ClassNode[] interfaces = node.getInterfaces(); for (int i = 0; i < interfaces.length; i++) { GenericsType interfacePart = new GenericsType(interfaces[i]); writeGenericsBounds(ret, interfacePart, false); } return ret.toString(); } private static void getGenericsTypeSpec(StringBuffer ret, GenericsType[] genericsTypes) { if (genericsTypes == null) return; ret.append('<'); for (int i = 0; i < genericsTypes.length; i++) { String name = genericsTypes[i].getName(); ret.append(name); ret.append(':'); writeGenericsBounds(ret, genericsTypes[i], true); } ret.append('>'); } public static String getGenericsBounds(ClassNode type) { GenericsType[] genericsTypes = type.getGenericsTypes(); if (genericsTypes == null) return null; StringBuffer ret = new StringBuffer(100); if (type.isGenericsPlaceHolder()) { addSubTypes(ret, type.getGenericsTypes(), "", ""); } else { GenericsType gt = new GenericsType(type); writeGenericsBounds(ret, gt, false); } return ret.toString(); } private static void writeGenericsBoundType( StringBuffer ret, ClassNode printType, boolean writeInterfaceMarker) { if (writeInterfaceMarker && printType.isInterface()) ret.append(":"); if (printType.equals(ClassHelper.OBJECT_TYPE) && printType.getGenericsTypes() != null) { ret.append("T"); ret.append(printType.getGenericsTypes()[0].getName()); ret.append(";"); } else { ret.append(getTypeDescription(printType, false)); addSubTypes(ret, printType.getGenericsTypes(), "<", ">"); if (!ClassHelper.isPrimitiveType(printType)) ret.append(";"); } } private static void writeGenericsBounds( StringBuffer ret, GenericsType type, boolean writeInterfaceMarker) { if (type.getUpperBounds() != null) { ClassNode[] bounds = type.getUpperBounds(); for (int i = 0; i < bounds.length; i++) { writeGenericsBoundType(ret, bounds[i], writeInterfaceMarker); } } else if (type.getLowerBound() != null) { writeGenericsBoundType(ret, type.getLowerBound(), writeInterfaceMarker); } else { writeGenericsBoundType(ret, type.getType(), writeInterfaceMarker); } } private static void addSubTypes( StringBuffer ret, GenericsType[] types, String start, String end) { if (types == null) return; ret.append(start); for (int i = 0; i < types.length; i++) { if (types[i].getType().isArray()) { ret.append("["); addSubTypes( ret, new GenericsType[] {new GenericsType(types[i].getType().getComponentType())}, "", ""); } else { if (types[i].isPlaceholder()) { ret.append('T'); String name = types[i].getName(); ret.append(name); ret.append(';'); } else if (types[i].isWildcard()) { if (types[i].getUpperBounds() != null) { ret.append('+'); writeGenericsBounds(ret, types[i], false); } else if (types[i].getLowerBound() != null) { ret.append('-'); writeGenericsBounds(ret, types[i], false); } else { ret.append('*'); } } else { writeGenericsBounds(ret, types[i], false); } } } ret.append(end); } public static void load(MethodVisitor mv, ClassNode type, int idx) { if (type == ClassHelper.double_TYPE) { mv.visitVarInsn(DLOAD, idx); } else if (type == ClassHelper.float_TYPE) { mv.visitVarInsn(FLOAD, idx); } else if (type == ClassHelper.long_TYPE) { mv.visitVarInsn(LLOAD, idx); } else if (type == ClassHelper.boolean_TYPE || type == ClassHelper.char_TYPE || type == ClassHelper.byte_TYPE || type == ClassHelper.int_TYPE || type == ClassHelper.short_TYPE) { mv.visitVarInsn(ILOAD, idx); } else { mv.visitVarInsn(ALOAD, idx); } } public static void doCast(MethodVisitor mv, ClassNode type) { if (type == ClassHelper.OBJECT_TYPE) return; if (ClassHelper.isPrimitiveType(type) && type != ClassHelper.VOID_TYPE) { unbox(mv, type); } else { mv.visitTypeInsn( CHECKCAST, type.isArray() ? BytecodeHelper.getTypeDescription(type) : BytecodeHelper.getClassInternalName(type.getName())); } } public static void doCast(MethodVisitor mv, Class type) { if (type == Object.class) return; if (type.isPrimitive() && type != Void.TYPE) { unbox(mv, type); } else { mv.visitTypeInsn( CHECKCAST, type.isArray() ? BytecodeHelper.getTypeDescription(type) : BytecodeHelper.getClassInternalName(type.getName())); } } /** Generates the bytecode to unbox the current value on the stack */ public static void unbox(MethodVisitor mv, Class type) { if (type.isPrimitive() && type != Void.TYPE) { String returnString = "(Ljava/lang/Object;)" + BytecodeHelper.getTypeDescription(type); mv.visitMethodInsn(INVOKESTATIC, DTT_CLASSNAME, type.getName() + "Unbox", returnString); } } public static void unbox(MethodVisitor mv, ClassNode type) { if (type.isPrimaryClassNode()) return; unbox(mv, type.getTypeClass()); } /** box top level operand */ public static boolean box(MethodVisitor mv, ClassNode type) { if (type.isPrimaryClassNode()) return false; return box(mv, type.getTypeClass()); } /** Generates the bytecode to autobox the current value on the stack */ public static boolean box(MethodVisitor mv, Class type) { if (ReflectionCache.getCachedClass(type).isPrimitive && type != void.class) { String returnString = "(" + BytecodeHelper.getTypeDescription(type) + ")Ljava/lang/Object;"; mv.visitMethodInsn(INVOKESTATIC, DTT_CLASSNAME, "box", returnString); return true; } return false; } }
public void load(ClassNode type, int idx) {
MethodVisitor mv = controller.getMethodVisitor();
BytecodeHelper.load(mv, type, idx);
push(type);
}
