List of usage examples for org.objectweb.asm Opcodes V1_5
int V1_5
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From source file:ataspectj.UnweavableTest.java
License:Open Source License
ISome getJit() {
ClassWriter cw = new ClassWriter(true, true);
cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "ataspectj/ISomeGen", null, "java/lang/Object",
new String[] { "ataspectj/UnweavableTest$ISome" });
AnnotationVisitor av = cw.visitAnnotation("Lataspectj/UnweavableTest$ASome;", true);
av.visitEnd();/* w w w.ja v a2 s .c om*/
MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, new String[0]);
mv.visitVarInsn(Opcodes.ALOAD, 0);
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitInsn(Opcodes.RETURN);
mv.visitMaxs(0, 0);
mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "giveOne", "()I", null, new String[0]);
mv.visitInsn(Opcodes.ICONST_2);
mv.visitInsn(Opcodes.IRETURN);
mv.visitMaxs(0, 0);
cw.visitEnd();
try {
ClassLoader loader = this.getClass().getClassLoader();
Method def = ClassLoader.class.getDeclaredMethod("defineClass",
new Class[] { String.class, byte[].class, int.class, int.class });
def.setAccessible(true);
Class gen = (Class) def.invoke(loader, "ataspectj.ISomeGen", cw.toByteArray(), 0,
cw.toByteArray().length);
return (ISome) gen.newInstance();
} catch (Throwable t) {
fail(t.toString());
return null;
}
}
From source file:ataspectj.UnweavableTest.java
License:Open Source License
Serializable getJitNoMatch() {
ClassWriter cw = new ClassWriter(true, true);
cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "ataspectj/unmatched/Gen", null, "java/lang/Object",
new String[] { "java/io/Serializable" });
MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, new String[0]);
mv.visitVarInsn(Opcodes.ALOAD, 0);//from w ww. j av a2 s . c o m
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitInsn(Opcodes.RETURN);
mv.visitMaxs(0, 0);
cw.visitEnd();
try {
ClassLoader loader = this.getClass().getClassLoader();
Method def = ClassLoader.class.getDeclaredMethod("defineClass",
new Class[] { String.class, byte[].class, int.class, int.class });
def.setAccessible(true);
Class gen = (Class) def.invoke(loader, "ataspectj.unmatched.Gen", cw.toByteArray(), 0,
cw.toByteArray().length);
return (Serializable) gen.newInstance();
} catch (Throwable t) {
fail(t.toString());
return null;
}
}
From source file:br.usp.each.saeg.badua.core.internal.ContentTypeDetector.java
License:Open Source License
private static int determineType(final InputStream in) throws IOException { final int header = readInt(in); switch (header) { case ZIPFILE: return ZIPFILE; case PACK200FILE: return PACK200FILE; case CLASSFILE: // also verify version to distinguish from Mach Object files: switch (readInt(in)) { case Opcodes.V1_1: case Opcodes.V1_2: case Opcodes.V1_3: case Opcodes.V1_4: case Opcodes.V1_5: case Opcodes.V1_6: case Opcodes.V1_7: case Opcodes.V1_8: return CLASSFILE; }/*from w ww . j ava 2 s . c om*/ } if ((header & 0xffff0000) == GZFILE) { return GZFILE; } return UNKNOWN; }
From source file:cn.annoreg.asm.DelegateGenerator.java
License:Open Source License
public static MethodVisitor generateStaticMethod(ClassVisitor parentClass, MethodVisitor parent, String className, String methodName, String desc, final Side side) { //This method is a little bit complicated. //We need to generate a delegate class implementing NetworkCallDelegate and a redirect //the code that originally generated here in parent, into the delegate class, //by returning a MethodVisitor under the ClassVisitor of the delegate class. //Besides, we should generate a call to NetworkCallManager into parent. //Above is the original method. Now it has a little bit change. To allow private call in //here, we need to generate the delegate method in this class instead of in a delegate class. //We make the delegate method public so that the delegate class can call it. //delegateName is a string used by both sides to identify a network-call delegate. final String delegateName = className + ":" + methodName + ":" + desc; final Type[] args = Type.getArgumentTypes(desc); final Type ret = Type.getReturnType(desc); //Check types for (Type t : args) { //TODO support these types if (!t.getDescriptor().startsWith("L") && !t.getDescriptor().startsWith("[")) { throw new RuntimeException("Unsupported argument type in network call. in method " + methodName + ", " + t.getDescriptor()); }//w w w . j av a 2 s .co m } if (!ret.equals(Type.VOID_TYPE)) { throw new RuntimeException( "Unsupported return value type in network call. " + "Only void is supported."); } //Generate call to NetworkCallManager in parent. parent.visitCode(); //First parameter parent.visitLdcInsn(delegateName); //Second parameter: object array pushIntegerConst(parent, args.length); //array size parent.visitTypeInsn(Opcodes.ANEWARRAY, Type.getInternalName(Object.class)); for (int i = 0; i < args.length; ++i) { parent.visitInsn(Opcodes.DUP); pushIntegerConst(parent, i); parent.visitVarInsn(Opcodes.ALOAD, i); parent.visitInsn(Opcodes.AASTORE); } //Call cn.annoreg.mc.network.NetworkCallManager.onNetworkCall parent.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(NetworkCallManager.class), "onNetworkCall", Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(String.class), Type.getType(Object[].class))); parent.visitInsn(Opcodes.RETURN); parent.visitMaxs(5, args.length); parent.visitEnd(); //Create delegate object. final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS); final String delegateId = Integer.toString(delegateNextID++); final Type delegateClassType = Type.getType("cn/annoreg/asm/NetworkCallDelegate_" + delegateId); cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, delegateClassType.getInternalName(), null, Type.getInternalName(Object.class), new String[] { Type.getInternalName(NetworkCallDelegate.class) }); //package cn.annoreg.asm; //class NetworkCallDelegate_? implements NetworkCallDelegate { { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(Object.class), "<init>", "()V"); mv.visitInsn(Opcodes.RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } //public NetworkCallDelegate_?() {} final String delegateFunctionName = methodName + "_delegate_" + delegateId; { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "invoke", Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(Object[].class)), null, null); mv.visitCode(); for (int i = 0; i < args.length; ++i) { mv.visitVarInsn(Opcodes.ALOAD, 1); //0 is this pushIntegerConst(mv, i); mv.visitInsn(Opcodes.AALOAD); mv.visitTypeInsn(Opcodes.CHECKCAST, args[i].getInternalName()); } mv.visitMethodInsn(Opcodes.INVOKESTATIC, //delegateClassType.getInternalName(), //changed to original class className.replace('.', '/'), delegateFunctionName, desc); mv.visitInsn(Opcodes.RETURN); mv.visitMaxs(args.length + 2, 2); mv.visitEnd(); } //@Override public void invoke(Object[] args) { // xxxx.xxxx_delegated_xxx((Type0) args[0], (Type1) args[1], ...); //} //The returned MethodVisitor will visit the original version of the method, //including its annotation, where we can get StorageOptions. return new MethodVisitor(Opcodes.ASM4, parentClass.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, delegateFunctionName, desc, null, null)) { //Remember storage options for each argument StorageOption.Option[] options = new StorageOption.Option[args.length]; int targetIndex = -1; StorageOption.Target.RangeOption range = StorageOption.Target.RangeOption.SINGLE; double sendRange = -1; { for (int i = 0; i < options.length; ++i) { options[i] = StorageOption.Option.NULL; //set default value } } @Override public AnnotationVisitor visitParameterAnnotation(final int parameter, String desc, boolean visible) { Type type = Type.getType(desc); if (type.equals(Type.getType(StorageOption.Data.class))) { options[parameter] = StorageOption.Option.DATA; } else if (type.equals(Type.getType(StorageOption.Instance.class))) { //INSTANCE as defualt options[parameter] = StorageOption.Option.INSTANCE; //Change to NULLABLE_INSTANCE if nullable set to true return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visit(String name, Object value) { if (name.equals("nullable")) { if ((Boolean) value == true) { options[parameter] = StorageOption.Option.NULLABLE_INSTANCE; } } super.visit(name, value); } }; } else if (type.equals(Type.getType(StorageOption.Update.class))) { options[parameter] = StorageOption.Option.UPDATE; } else if (type.equals(Type.getType(StorageOption.Null.class))) { options[parameter] = StorageOption.Option.NULL; } else if (type.equals(Type.getType(StorageOption.Target.class))) { if (!args[parameter].equals(Type.getType(EntityPlayer.class))) { throw new RuntimeException("Target annotation can only be used on EntityPlayer."); } if (targetIndex != -1) { throw new RuntimeException("You can not specify multiple targets."); } options[parameter] = StorageOption.Option.INSTANCE; targetIndex = parameter; return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visitEnum(String name, String desc, String value) { super.visitEnum(name, desc, value); range = StorageOption.Target.RangeOption.valueOf(value); } }; } else if (type.equals(Type.getType(StorageOption.RangedTarget.class))) { if (targetIndex != -1) { throw new RuntimeException("You can not specify multiple targets."); } range = null; targetIndex = parameter; return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visit(String name, Object value) { super.visit(name, value); sendRange = (double) value; } }; } return super.visitParameterAnnotation(parameter, desc, visible); } @Override public void visitEnd() { super.visitEnd(); //This is the last method in the delegate class. //Finish the class and do the registration. cw.visitEnd(); try { Class<?> clazz = classLoader.defineClass(delegateClassType.getClassName(), cw.toByteArray()); NetworkCallDelegate delegateObj = (NetworkCallDelegate) clazz.newInstance(); if (side == Side.CLIENT) { NetworkCallManager.registerClientDelegateClass(delegateName, delegateObj, options, targetIndex, range, sendRange); } else { NetworkCallManager.registerServerDelegateClass(delegateName, delegateObj, options); } } catch (Throwable e) { throw new RuntimeException("Can not create delegate for network call.", e); } } }; //public static void delegated(Type0 arg0, Type1, arg1, ...) { // //Code generated by caller. //} //} }
From source file:cn.annoreg.asm.DelegateGenerator.java
License:Open Source License
public static MethodVisitor generateNonStaticMethod(ClassVisitor parentClass, MethodVisitor parent, String className, String methodName, String desc, final Side side) { //convert desc to a non-static method form String nonstaticDesc;/*from w w w . j av a 2 s. c o m*/ { Type staticType = Type.getMethodType(desc); Type retType = staticType.getReturnType(); Type[] argsType = staticType.getArgumentTypes(); Type[] argsTypeWithThis = new Type[argsType.length + 1]; argsTypeWithThis[0] = Type.getType('L' + className.replace('.', '/') + ';'); System.arraycopy(argsType, 0, argsTypeWithThis, 1, argsType.length); nonstaticDesc = Type.getMethodDescriptor(retType, argsTypeWithThis); } //delegateName is a string used by both sides to identify a network-call delegate. final String delegateName = className + ":" + methodName + ":" + desc; final Type[] args = Type.getArgumentTypes(nonstaticDesc); final Type ret = Type.getReturnType(nonstaticDesc); //Check types for (Type t : args) { //TODO support these types if (!t.getDescriptor().startsWith("L") && !t.getDescriptor().startsWith("[")) { throw new RuntimeException("Unsupported argument type in network call. "); } } if (!ret.equals(Type.VOID_TYPE)) { throw new RuntimeException( "Unsupported return value type in network call. " + "Only void is supported."); } //Generate call to NetworkCallManager in parent. parent.visitCode(); //First parameter parent.visitLdcInsn(delegateName); //Second parameter: object array pushIntegerConst(parent, args.length); //this (0) has been included parent.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object"); for (int i = 0; i < args.length; ++i) { parent.visitInsn(Opcodes.DUP); pushIntegerConst(parent, i); parent.visitVarInsn(Opcodes.ALOAD, i); parent.visitInsn(Opcodes.AASTORE); } //Call cn.annoreg.mc.network.NetworkCallManager.onNetworkCall parent.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(NetworkCallManager.class), "onNetworkCall", "(Ljava/lang/String;[Ljava/lang/Object;)V"); parent.visitInsn(Opcodes.RETURN); parent.visitMaxs(5, args.length); parent.visitEnd(); //Create delegate object. final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS); final String delegateId = Integer.toString(delegateNextID++); final Type delegateClassType = Type.getType("cn/annoreg/asm/NetworkCallDelegate_" + delegateId); cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, delegateClassType.getInternalName(), null, Type.getInternalName(Object.class), new String[] { Type.getInternalName(NetworkCallDelegate.class) }); //package cn.annoreg.asm; //class NetworkCallDelegate_? implements NetworkCallDelegate { { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(Object.class), "<init>", "()V"); mv.visitInsn(Opcodes.RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } //public NetworkCallDelegate_?() {} final String delegateMethodName = methodName + "_delegate_" + delegateId; { MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "invoke", Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(Object[].class)), null, null); mv.visitCode(); //check if this is null mv.visitVarInsn(Opcodes.ALOAD, 1); //0 is this pushIntegerConst(mv, 0); mv.visitInsn(Opcodes.AALOAD); Label lblEnd = new Label(); mv.visitJumpInsn(Opcodes.IFNULL, lblEnd); for (int i = 0; i < args.length; ++i) { mv.visitVarInsn(Opcodes.ALOAD, 1); //0 is this pushIntegerConst(mv, i); mv.visitInsn(Opcodes.AALOAD); mv.visitTypeInsn(Opcodes.CHECKCAST, args[i].getInternalName()); } mv.visitMethodInsn(Opcodes.INVOKESTATIC, //delegateClassType.getInternalName(), className.replace('.', '/'), delegateMethodName, nonstaticDesc); mv.visitLabel(lblEnd); mv.visitInsn(Opcodes.RETURN); mv.visitMaxs(args.length + 2, 2); mv.visitEnd(); } //@Override public void invoke(Object[] args) { // delegated((Type0) args[0], (Type1) args[1], ...); //} //The returned MethodVisitor will visit the original version of the method, //including its annotation, where we can get StorageOptions. return new MethodVisitor(Opcodes.ASM4, parentClass.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, delegateMethodName, nonstaticDesc, null, null)) { //Remember storage options for each argument StorageOption.Option[] options = new StorageOption.Option[args.length]; int targetIndex = -1; double sendRange = -1; StorageOption.Target.RangeOption range = StorageOption.Target.RangeOption.SINGLE; { for (int i = 0; i < options.length; ++i) { options[i] = StorageOption.Option.NULL; //set default value } options[0] = StorageOption.Option.INSTANCE; } @Override public AnnotationVisitor visitParameterAnnotation(int parameter_in_func, String desc, boolean visible) { final int parameter = parameter_in_func + 1; //skip this Type type = Type.getType(desc); if (type.equals(Type.getType(StorageOption.Data.class))) { options[parameter] = StorageOption.Option.DATA; } else if (type.equals(Type.getType(StorageOption.Instance.class))) { //INSTANCE as defualt options[parameter] = StorageOption.Option.INSTANCE; //Change to NULLABLE_INSTANCE if nullable set to true return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visit(String name, Object value) { if (name.equals("nullable")) { if ((Boolean) value == true) { options[parameter] = StorageOption.Option.NULLABLE_INSTANCE; } } super.visit(name, value); } }; } else if (type.equals(Type.getType(StorageOption.Update.class))) { options[parameter] = StorageOption.Option.UPDATE; } else if (type.equals(Type.getType(StorageOption.Null.class))) { options[parameter] = StorageOption.Option.NULL; } else if (type.equals(Type.getType(StorageOption.Target.class))) { if (!args[parameter].equals(Type.getType(EntityPlayer.class))) { throw new RuntimeException("Target annotation can only be used on EntityPlayer."); } if (targetIndex != -1) { throw new RuntimeException("You can not specify multiple targets."); } options[parameter] = StorageOption.Option.INSTANCE; targetIndex = parameter; return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visitEnum(String name, String desc, String value) { super.visitEnum(name, desc, value); range = StorageOption.Target.RangeOption.valueOf(value); } }; } else if (type.equals(Type.getType(StorageOption.RangedTarget.class))) { if (targetIndex != -1) { throw new RuntimeException("You can not specify multiple targets."); } targetIndex = parameter; range = null; return new AnnotationVisitor(this.api, super.visitParameterAnnotation(parameter, desc, visible)) { @Override public void visit(String name, Object value) { super.visit(name, value); sendRange = (double) value; } }; } return super.visitParameterAnnotation(parameter, desc, visible); } //TODO this option (from annotation) @Override public void visitEnd() { super.visitEnd(); //This is the last method in the delegate class. //Finish the class and do the registration. cw.visitEnd(); try { Class<?> clazz = classLoader.defineClass(delegateClassType.getClassName(), cw.toByteArray()); NetworkCallDelegate delegateObj = (NetworkCallDelegate) clazz.newInstance(); if (side == Side.CLIENT) { NetworkCallManager.registerClientDelegateClass(delegateName, delegateObj, options, targetIndex, range, sendRange); } else { NetworkCallManager.registerServerDelegateClass(delegateName, delegateObj, options); } } catch (Throwable e) { throw new RuntimeException("Can not create delegate for network call.", e); } } }; //public static void delegated(Type0 arg0, Type1, arg1, ...) { // //Code generated by caller. //} //} }
From source file:co.paralleluniverse.fibers.instrument.InstrumentClass.java
License:Open Source License
@Override public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {//from w ww.ja v a 2 s . c om this.className = name; this.isInterface = (access & Opcodes.ACC_INTERFACE) != 0; this.classEntry = db.getOrCreateClassEntry(className, superName); classEntry.setInterfaces(interfaces); this.forceInstrumentation |= classEntry.requiresInstrumentation(); // need atleast 1.5 for annotations to work if (version < Opcodes.V1_5) version = Opcodes.V1_5; // When Java allows adding interfaces in retransformation, we can mark the class with an interface, which makes checking whether it's instrumented faster (with instanceof) // if(classEntry.requiresInstrumentation() && !contains(interfaces, SUSPENDABLE_NAME)) { // System.out.println("XX: Marking " + className + " as " + SUSPENDABLE_NAME); // interfaces = add(interfaces, SUSPENDABLE_NAME); // } super.visit(version, access, name, signature, superName, interfaces); }
From source file:co.paralleluniverse.fibers.instrument.LabelSuspendableCallSitesClassVisitor.java
License:Open Source License
@Override public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {/*from ww w. ja va 2s .com*/ this.className = name; // need atleast 1.5 for annotations to work if (version < Opcodes.V1_5) version = Opcodes.V1_5; super.visit(version, access, name, signature, superName, interfaces); }
From source file:com.android.build.gradle.shrinker.parser.ProguardFlags.java
License:Apache License
public void target(@NonNull String target) { int version;//w w w . ja va 2s . co m switch (target) { case "8": case "1.8": version = Opcodes.V1_8; break; case "7": case "1.7": version = Opcodes.V1_7; break; case "6": case "1.6": version = Opcodes.V1_6; break; case "5": case "1.5": version = Opcodes.V1_5; break; case "1.4": version = Opcodes.V1_4; break; case "1.3": version = Opcodes.V1_3; break; case "1.2": version = Opcodes.V1_2; break; case "1.1": version = Opcodes.V1_1; break; default: throw new AssertionError("Unknown target " + target); } this.bytecodeVersion = new BytecodeVersion(version); }
From source file:com.e2info.helloasm.HelloAsmApp.java
License:Open Source License
public static void main(String[] args) throws IOException { String name = "HelloAsm"; int flag = ClassWriter.COMPUTE_MAXS; ClassWriter cw = new ClassWriter(flag); cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, name, null, "java/lang/Object", null); cw.visitSource(name + ".java", null); {//from ww w .j a v a 2 s .c om MethodVisitor mv; mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V"); mv.visitInsn(Opcodes.RETURN); // we need this call to take effect ClassWriter.COMPUTE_MAXS flag. mv.visitMaxs(0, 0); mv.visitEnd(); } { MethodVisitor mv; mv = cw.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); mv.visitCode(); mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("hello ASM"); mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V"); mv.visitInsn(Opcodes.RETURN); // we need this call to take effect ClassWriter.COMPUTE_MAXS flag. mv.visitMaxs(0, 0); mv.visitEnd(); } cw.visitEnd(); // build binary byte[] bin = cw.toByteArray(); // save asm trace for human readable { StringWriter sw = new StringWriter(); PrintWriter pw = new PrintWriter(sw); new ClassReader(bin).accept(new TraceClassVisitor(pw), 0); File f = new File(name + ".txt"); FileUtils.writeStringToFile(f, sw.toString()); } // save as calss file { File f = new File(name + ".class"); FileUtils.writeByteArrayToFile(f, bin); } }
From source file:com.facebook.buck.jvm.java.abi.ClassVisitorDriverFromElement.java
License:Apache License
/** Gets the class file version corresponding to the given source version constant. */ private static int sourceVersionToClassFileVersion(SourceVersion version) { switch (version) { case RELEASE_0: return Opcodes.V1_1; // JVMS8 4.1: 1.0 and 1.1 both support version 45.3 (Opcodes.V1_1) case RELEASE_1: return Opcodes.V1_1; case RELEASE_2: return Opcodes.V1_2; case RELEASE_3: return Opcodes.V1_3; case RELEASE_4: return Opcodes.V1_4; case RELEASE_5: return Opcodes.V1_5; case RELEASE_6: return Opcodes.V1_6; case RELEASE_7: return Opcodes.V1_7; case RELEASE_8: return Opcodes.V1_8; default:/*from w ww . ja v a 2s . com*/ throw new IllegalArgumentException(String.format("Unexpected source version: %s", version)); } }