List of usage examples for org.objectweb.asm MethodVisitor visitLdcInsn
public void visitLdcInsn(final Object value)
From source file:com.liferay.alloy.mvc.jsonwebservice.AlloyControllerInvokerManager.java
License:Open Source License
protected byte[] generateAlloyControllerInvokerClassData(Class<?> controllerClass, String alloyControllerInvokerClassName) throws NoClassNecessaryException { boolean jsonWebServiceMethodsPresent = false; ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES); String alloyControllerInvokerClassBinaryName = getClassBinaryName(alloyControllerInvokerClassName); String baseAlloyControllerInvokerClassBinaryName = getClassBinaryName( BaseAlloyControllerInvokerImpl.class.getName()); classWriter.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER, alloyControllerInvokerClassBinaryName, null, baseAlloyControllerInvokerClassBinaryName, null); MethodVisitor methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null); methodVisitor.visitCode();/*from w ww. j a v a 2s .co m*/ methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, baseAlloyControllerInvokerClassBinaryName, "<init>", "()V"); methodVisitor.visitInsn(Opcodes.RETURN); methodVisitor.visitMaxs(1, 1); methodVisitor.visitEnd(); Method[] methods = controllerClass.getDeclaredMethods(); for (Method method : methods) { if (!Modifier.isPublic(method.getModifiers())) { continue; } JSONWebServiceMethod jsonWebServiceMethod = method.getAnnotation(JSONWebServiceMethod.class); if (jsonWebServiceMethod == null) { continue; } jsonWebServiceMethodsPresent = true; Class<?>[] parameterTypes = jsonWebServiceMethod.parameterTypes(); StringBundler sb = new StringBundler(parameterTypes.length + 3); sb.append(StringPool.OPEN_PARENTHESIS); for (Class<?> parameterType : parameterTypes) { sb.append(Type.getDescriptor(parameterType)); } sb.append(StringPool.CLOSE_PARENTHESIS); sb.append(Type.getDescriptor(JSONSerializable.class)); String methodDescriptor = sb.toString(); methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, method.getName(), methodDescriptor, null, new String[] { getClassBinaryName(Exception.class.getName()) }); methodVisitor.visitCode(); for (int i = 0; i < parameterTypes.length; i++) { String parameterName = jsonWebServiceMethod.parameterNames()[i]; Class<?> parameterType = parameterTypes[i]; methodVisitor.visitLocalVariable(parameterName, Type.getDescriptor(parameterType), null, new Label(), new Label(), i + 1); } methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitLdcInsn(jsonWebServiceMethod.lifecycle()); methodVisitor.visitIntInsn(Opcodes.BIPUSH, parameterTypes.length * 2 + 2); methodVisitor.visitTypeInsn(Opcodes.ANEWARRAY, getClassBinaryName(Object.class.getName())); methodVisitor.visitInsn(Opcodes.DUP); methodVisitor.visitInsn(Opcodes.ICONST_0); methodVisitor.visitLdcInsn("action"); methodVisitor.visitInsn(Opcodes.AASTORE); methodVisitor.visitInsn(Opcodes.DUP); methodVisitor.visitInsn(Opcodes.ICONST_1); methodVisitor.visitLdcInsn(method.getName()); methodVisitor.visitInsn(Opcodes.AASTORE); for (int i = 0; i < parameterTypes.length; i++) { String parameterName = jsonWebServiceMethod.parameterNames()[i]; methodVisitor.visitInsn(Opcodes.DUP); methodVisitor.visitIntInsn(Opcodes.BIPUSH, (i + 1) * 2); methodVisitor.visitLdcInsn(parameterName); methodVisitor.visitInsn(Opcodes.AASTORE); methodVisitor.visitInsn(Opcodes.DUP); methodVisitor.visitIntInsn(Opcodes.BIPUSH, (i + 1) * 2 + 1); methodVisitor.visitVarInsn(Opcodes.ALOAD, i + 1); methodVisitor.visitInsn(Opcodes.AASTORE); } sb = new StringBundler(5); sb.append(StringPool.OPEN_PARENTHESIS); sb.append(Type.getDescriptor(String.class)); sb.append(Type.getDescriptor(Object[].class)); sb.append(StringPool.CLOSE_PARENTHESIS); sb.append(Type.getDescriptor(JSONSerializable.class)); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, alloyControllerInvokerClassBinaryName, "invokeAlloyController", sb.toString()); methodVisitor.visitInsn(Opcodes.ARETURN); methodVisitor.visitMaxs(-1, -1); methodVisitor.visitEnd(); } classWriter.visitEnd(); if (!jsonWebServiceMethodsPresent) { throw new NoClassNecessaryException(); } return classWriter.toByteArray(); }
From source file:com.liferay.portal.upgrade.test.BaseBuildAutoUpgradeTestCase.java
License:Open Source License
private void _initTableColumns(MethodVisitor methodVisitor, Object[][] tableColumns) { methodVisitor.visitCode();// w ww . ja v a2 s . c o m methodVisitor.visitInsn(Opcodes.ICONST_0 + tableColumns.length); methodVisitor.visitTypeInsn(Opcodes.ANEWARRAY, Type.getDescriptor(Object[].class)); methodVisitor.visitInsn(Opcodes.DUP); for (int i = 0; i < tableColumns.length; i++) { Object[] tableColumn = tableColumns[i]; methodVisitor.visitInsn(Opcodes.ICONST_0 + i); methodVisitor.visitInsn(Opcodes.ICONST_2); methodVisitor.visitTypeInsn(Opcodes.ANEWARRAY, Type.getInternalName(Object.class)); methodVisitor.visitInsn(Opcodes.DUP); methodVisitor.visitInsn(Opcodes.ICONST_0); methodVisitor.visitLdcInsn(tableColumn[0]); methodVisitor.visitInsn(Opcodes.AASTORE); methodVisitor.visitInsn(Opcodes.DUP); methodVisitor.visitInsn(Opcodes.ICONST_1); methodVisitor.visitIntInsn(Opcodes.BIPUSH, (Integer) tableColumn[1]); methodVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(Integer.class), "valueOf", Type.getMethodDescriptor(Type.getType(Integer.class), Type.INT_TYPE), false); methodVisitor.visitInsn(Opcodes.AASTORE); methodVisitor.visitInsn(Opcodes.AASTORE); if (i < (tableColumns.length - 1)) { methodVisitor.visitInsn(Opcodes.DUP); } } methodVisitor.visitFieldInsn(Opcodes.PUTSTATIC, Type.getInternalName(BuildAutoUpgradeTestEntityModelImpl.class), "TABLE_COLUMNS", Type.getDescriptor(Object[][].class)); methodVisitor.visitInsn(Opcodes.RETURN); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); }
From source file:com.lighters.asm.HelloWorld.java
License:Apache License
public static void main(final String args[]) throws Exception { // Generates the bytecode corresponding to the following Java class: ///*ww w . j a va 2s .c o m*/ // public class Example { // public static void main (String[] args) { // System.out.println("Hello world!"); // } // } // creates a ClassWriter for the Example public class, // which inherits from Object ClassWriter cw = new ClassWriter(0); cw.visit(V1_1, ACC_PUBLIC, "Example", null, "java/lang/Object", null); // creates a MethodWriter for the (implicit) constructor MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); // pushes the 'this' variable mw.visitVarInsn(ALOAD, 0); // invokes the super class constructor mw.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); mw.visitInsn(RETURN); // this code uses a maximum of one stack element and one local variable mw.visitMaxs(1, 1); mw.visitEnd(); // creates a MethodWriter for the 'main' method mw = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); // pushes the 'out' field (of type PrintStream) of the System class mw.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); // pushes the "Hello World!" String constant mw.visitLdcInsn("Hello world!"); // invokes the 'println' method (defined in the PrintStream class) mw.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false); mw.visitInsn(RETURN); // this code uses a maximum of two stack elements and two local // variables mw.visitMaxs(2, 2); mw.visitEnd(); // gets the bytecode of the Example class, and loads it dynamically byte[] code = cw.toByteArray(); FileOutputStream fos = new FileOutputStream("Example.class"); fos.write(code); fos.close(); HelloWorld loader = new HelloWorld(); Class<?> exampleClass = loader.defineClass("Example", code, 0, code.length); // uses the dynamically generated class to print 'Helloworld' exampleClass.getMethods()[0].invoke(null, new Object[] { null }); // ------------------------------------------------------------------------ // Same example with a GeneratorAdapter (more convenient but slower) // ------------------------------------------------------------------------ cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); cw.visit(V1_1, ACC_PUBLIC, "Example", null, "java/lang/Object", null); // creates a GeneratorAdapter for the (implicit) constructor Method m = Method.getMethod("void <init> ()"); GeneratorAdapter mg = new GeneratorAdapter(ACC_PUBLIC, m, null, null, cw); mg.loadThis(); mg.invokeConstructor(Type.getType(Object.class), m); mg.returnValue(); mg.endMethod(); // creates a GeneratorAdapter for the 'main' method m = Method.getMethod("void main (String[])"); mg = new GeneratorAdapter(ACC_PUBLIC + ACC_STATIC, m, null, null, cw); mg.getStatic(Type.getType(System.class), "out", Type.getType(PrintStream.class)); mg.push("Hello world!"); mg.invokeVirtual(Type.getType(PrintStream.class), Method.getMethod("void println (String)")); mg.returnValue(); mg.endMethod(); cw.visitEnd(); code = cw.toByteArray(); loader = new HelloWorld(); exampleClass = loader.defineClass("Example", code, 0, code.length); // uses the dynamically generated class to print 'Helloworld' exampleClass.getMethods()[0].invoke(null, new Object[] { null }); }
From source file:com.lucidtechnics.blackboard.TargetConstructor.java
License:Apache License
private static final byte[] createWrapperObjectByteArray(String _targetName, Class _class) { ClassWriter classWriter = new ClassWriter(true); FieldVisitor fieldVisitor;/*from w w w. j a va 2s .co m*/ MethodVisitor methodVisitor; String superClassName = _class.getCanonicalName().replaceAll("\\.", "/"); String[] superClassNameParts = superClassName.split("/"); String simpleClassName = superClassNameParts[superClassNameParts.length - 1]; String blackboardSubClassName = "com/lucidtechnics/blackboard/wrapper/" + superClassName + "Wrapper"; classWriter.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, blackboardSubClassName, null, superClassName, new String[] { "com/lucidtechnics/blackboard/Target" }); classWriter.visitSource(simpleClassName, null); { fieldVisitor = classWriter.visitField(Opcodes.ACC_PRIVATE, "blackboardObject", "Ljava/lang/Object;", null, null); fieldVisitor.visitEnd(); } { fieldVisitor = classWriter.visitField(Opcodes.ACC_PRIVATE, "intercepter", "Lcom/lucidtechnics/blackboard/Intercepter;", null, null); fieldVisitor.visitEnd(); } { methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "getBlackboardObject", "()Ljava/lang/Object;", null, null); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitFieldInsn(Opcodes.GETFIELD, blackboardSubClassName, "blackboardObject", "Ljava/lang/Object;"); methodVisitor.visitInsn(Opcodes.ARETURN); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); } { methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "getIntercepter", "()Lcom/lucidtechnics/blackboard/Intercepter;", null, null); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitFieldInsn(Opcodes.GETFIELD, blackboardSubClassName, "intercepter", "Lcom/lucidtechnics/blackboard/Intercepter;"); methodVisitor.visitInsn(Opcodes.ARETURN); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); } { methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "setBlackboardObject", "(Ljava/lang/Object;)V", null, null); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitVarInsn(Opcodes.ALOAD, 1); methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, blackboardSubClassName, "blackboardObject", "Ljava/lang/Object;"); methodVisitor.visitInsn(Opcodes.RETURN); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); } { methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "setIntercepter", "(Lcom/lucidtechnics/blackboard/Intercepter;)V", null, null); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitVarInsn(Opcodes.ALOAD, 1); methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, blackboardSubClassName, "intercepter", "Lcom/lucidtechnics/blackboard/Intercepter;"); methodVisitor.visitInsn(Opcodes.RETURN); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); } { methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, superClassName, "<init>", "()V"); methodVisitor.visitInsn(Opcodes.RETURN); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); } List mutatorMethodList = findMutatorMethods(_class); Iterator mutatorMethods = mutatorMethodList.iterator(); while (mutatorMethods.hasNext() == true) { Method method = (Method) mutatorMethods.next(); MethodInfo methodInfo = (MethodInfo) MethodInfoTransformer.getInstance().transform(method); Signature signature = methodInfo.getSignature(); String methodName = signature.getName(); String parameterType = signature.getArgumentTypes()[0].getDescriptor(); String returnType = signature.getReturnType().getDescriptor(); String[] exceptionTypeArray = createExceptionTypeArray(methodInfo.getExceptionTypes()); { methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, methodName, "(" + parameterType + ")" + returnType, null, exceptionTypeArray); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, blackboardSubClassName, "getIntercepter", "()Lcom/lucidtechnics/blackboard/Intercepter;"); Label l1 = new Label(); methodVisitor.visitJumpInsn(Opcodes.IFNULL, l1); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, blackboardSubClassName, "getIntercepter", "()Lcom/lucidtechnics/blackboard/Intercepter;"); methodVisitor.visitLdcInsn(superClassName); methodVisitor.visitLdcInsn(blackboardSubClassName); methodVisitor.visitLdcInsn(methodName); methodVisitor.visitLdcInsn(_targetName); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); int tempOpCode = getLoadOpcode(parameterType); methodVisitor.visitVarInsn(tempOpCode, 1); if (tempOpCode == Opcodes.ALOAD) { //this is an object. methodVisitor.visitMethodInsn(Opcodes.INVOKEINTERFACE, "com/lucidtechnics/blackboard/Intercepter", "monitor", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V"); } else { //it is a primitive. methodVisitor.visitMethodInsn(Opcodes.INVOKEINTERFACE, "com/lucidtechnics/blackboard/Intercepter", "monitor", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/Object;" + parameterType + ")V"); } methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, blackboardSubClassName, "getBlackboardObject", "()Ljava/lang/Object;"); methodVisitor.visitTypeInsn(Opcodes.CHECKCAST, superClassName); methodVisitor.visitVarInsn(getLoadOpcode(parameterType), 1); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, superClassName, methodName, "(" + parameterType + ")" + returnType); methodVisitor.visitLabel(l1); methodVisitor.visitInsn(getReturnOpcode(returnType)); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); } } List otherPublicMethodList = findOtherPublicMethods(_class); Iterator otherPublicMethods = otherPublicMethodList.iterator(); while (otherPublicMethods.hasNext() == true) { Method method = (Method) otherPublicMethods.next(); MethodInfo methodInfo = (MethodInfo) MethodInfoTransformer.getInstance().transform(method); Signature signature = methodInfo.getSignature(); String methodName = signature.getName(); String parameterTypes = constructParameterTypes(signature.getArgumentTypes()); String returnType = signature.getReturnType().getDescriptor(); String[] exceptionTypeArray = createExceptionTypeArray(methodInfo.getExceptionTypes()); if (logger.isDebugEnabled() == true) { logger.debug("Processing method: " + methodName); } if (logger.isDebugEnabled() == true) { logger.debug("Parameter types are: " + parameterTypes); } if ("toString".equalsIgnoreCase(methodName) == false) { methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, methodName, "(" + parameterTypes + ")" + returnType, null, exceptionTypeArray); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, blackboardSubClassName, "getBlackboardObject", "()Ljava/lang/Object;"); methodVisitor.visitTypeInsn(Opcodes.CHECKCAST, superClassName); methodVisitor.visitVarInsn(Opcodes.ASTORE, signature.getArgumentTypes().length + 1); methodVisitor.visitVarInsn(Opcodes.ALOAD, signature.getArgumentTypes().length + 1); loadParameters(methodVisitor, signature.getArgumentTypes()); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, superClassName, methodName, "(" + parameterTypes + ")" + returnType); methodVisitor.visitInsn(getReturnOpcode(returnType)); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); } } List protectedMethodList = findProtectedMethods(_class); Iterator protectedMethods = protectedMethodList.iterator(); while (protectedMethods.hasNext() == true) { Method method = (Method) protectedMethods.next(); MethodInfo methodInfo = (MethodInfo) MethodInfoTransformer.getInstance().transform(method); Signature signature = methodInfo.getSignature(); String methodName = signature.getName(); String parameterTypes = constructParameterTypes(signature.getArgumentTypes()); String returnType = signature.getReturnType().getDescriptor(); String[] exceptionTypeArray = createExceptionTypeArray(methodInfo.getExceptionTypes()); if (logger.isDebugEnabled() == true) { logger.debug("Processing method: " + methodName + " and parameter types are: " + parameterTypes); } { methodVisitor = classWriter.visitMethod(Opcodes.ACC_PROTECTED, methodName, "(" + parameterTypes + ")" + returnType, null, exceptionTypeArray); methodVisitor.visitCode(); methodVisitor.visitTypeInsn(Opcodes.NEW, "com/lucidtechnics/blackboard/BlackboardException"); methodVisitor.visitInsn(Opcodes.DUP); methodVisitor.visitLdcInsn("Unable to access protected methods on Blackboard object"); methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, "com/lucidtechnics/blackboard/BlackboardException", "<init>", "(Ljava/lang/String;)V"); methodVisitor.visitInsn(Opcodes.ATHROW); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); } } { methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null); methodVisitor.visitCode(); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, blackboardSubClassName, "getBlackboardObject", "()Ljava/lang/Object;"); methodVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, "com/lucidtechnics/blackboard/util/Utility", "toString", "(Ljava/lang/Object;)Ljava/lang/String;"); methodVisitor.visitInsn(getReturnOpcode("Ljava/lang/String;")); methodVisitor.visitMaxs(0, 0); methodVisitor.visitEnd(); } classWriter.visitEnd(); if (logger.isDebugEnabled() == true) { logger.debug("Finished creating new class: " + blackboardSubClassName + " for target class: " + superClassName + "."); } return classWriter.toByteArray(); }
From source file:com.mogujie.instantrun.IncrementalTool.java
License:Apache License
public static byte[] getPatchFileContents(ImmutableList<String> patchFileContents, ImmutableList<Integer> patchIndexContents) { if (patchFileContents.size() != patchIndexContents.size()) { throw new GradleException("patchFileContents's size is " + patchFileContents.size() + ", but patchIndexContents's size is " + patchIndexContents.size() + ", please check the changed classes."); }/*from w w w. j av a 2 s. co m*/ ClassWriter cw = new ClassWriter(0); MethodVisitor mv; cw.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, IncrementalVisitor.APP_PATCHES_LOADER_IMPL, null, IncrementalVisitor.ABSTRACT_PATCHES_LOADER_IMPL, null); { mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, IncrementalVisitor.ABSTRACT_PATCHES_LOADER_IMPL, "<init>", "()V", false); mv.visitInsn(Opcodes.RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } { mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "getPatchedClasses", "()[Ljava/lang/String;", null, null); mv.visitCode(); mv.visitIntInsn(Opcodes.SIPUSH, patchFileContents.size()); mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/String"); for (int index = 0; index < patchFileContents.size(); index++) { mv.visitInsn(Opcodes.DUP); mv.visitIntInsn(Opcodes.SIPUSH, index); mv.visitLdcInsn(patchFileContents.get(index)); mv.visitInsn(Opcodes.AASTORE); } mv.visitInsn(Opcodes.ARETURN); mv.visitMaxs(4, 1); mv.visitEnd(); } { mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "getPatchedClassIndexes", "()[I", null, null); mv.visitCode(); mv.visitIntInsn(Opcodes.SIPUSH, patchIndexContents.size()); mv.visitIntInsn(Opcodes.NEWARRAY, Opcodes.T_INT); for (int index = 0; index < patchIndexContents.size(); index++) { mv.visitInsn(Opcodes.DUP); mv.visitIntInsn(Opcodes.SIPUSH, index); mv.visitLdcInsn(patchIndexContents.get(index)); mv.visitInsn(Opcodes.IASTORE); } mv.visitInsn(Opcodes.ARETURN); mv.visitMaxs(4, 1); mv.visitEnd(); } cw.visitEnd(); return cw.toByteArray(); }
From source file:com.mto.asm.helloworld.ASMCodeGenerator.java
License:Open Source License
/** * Generate the byte code of a simple HelloWorld program * * public class HelloWorld/*from w w w. j a v a2 s . c om*/ * { * public void sayHello() * { * System.out.println("Hello World"); * } * } * @return */ public byte[] generateHelloWorld() { ClassWriter cw = new ClassWriter(0); MethodVisitor mv; cw.visit(V1_6, ACC_PUBLIC + ACC_SUPER, "com/mto/asm/helloworld/HelloWorld", null, "java/lang/Object", null); cw.visitSource("HelloWorld.java", null); mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); Label l0 = new Label(); mv.visitLabel(l0); mv.visitLineNumber(25, l0); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V"); mv.visitInsn(RETURN); Label l1 = new Label(); mv.visitLabel(l1); mv.visitLocalVariable("this", "Lcom/mto/asm/helloworld/HelloWorld;", null, l0, l1, 0); mv.visitMaxs(1, 1); mv.visitEnd(); mv = cw.visitMethod(ACC_PUBLIC, "sayHello", "()V", null, null); mv.visitCode(); l0 = new Label(); mv.visitLabel(l0); mv.visitLineNumber(29, l0); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("Hello World"); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V"); l1 = new Label(); mv.visitLabel(l1); mv.visitLineNumber(30, l1); mv.visitInsn(RETURN); Label l2 = new Label(); mv.visitLabel(l2); mv.visitLocalVariable("this", "Lcom/mto/asm/helloworld/HelloWorld;", null, l0, l2, 0); mv.visitMaxs(2, 1); mv.visitEnd(); cw.visitEnd(); return cw.toByteArray(); }
From source file:com.mulberry.athena.asm.ASMTest.java
License:Open Source License
@Test public void generateClass() throws Exception { ClassWriter classWriter = new ClassWriter(0); ClassVisitor cv = new TraceClassVisitor(classWriter, new PrintWriter(System.out)); //FieldVisitor fv; MethodVisitor mv; //AnnotationVisitor av0; cv.visit(V1_6, ACC_PUBLIC + ACC_SUPER, "Testing", null, "java/lang/Object", null); cv.visitSource("Testing.java", null); {/*from w ww . j a v a 2 s .c om*/ mv = cv.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); Label l0 = new Label(); mv.visitLabel(l0); mv.visitLineNumber(1, l0); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V"); mv.visitInsn(RETURN); Label l1 = new Label(); mv.visitLabel(l1); mv.visitLocalVariable("this", "LTesting;", null, l0, l1, 0); mv.visitMaxs(1, 1); mv.visitEnd(); } { mv = cv.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); mv.visitCode(); Label l0 = new Label(); mv.visitLabel(l0); mv.visitLineNumber(3, l0); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("Works!"); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V"); Label l1 = new Label(); mv.visitLabel(l1); mv.visitLineNumber(4, l1); mv.visitInsn(RETURN); Label l2 = new Label(); mv.visitLabel(l2); mv.visitLocalVariable("args", "[Ljava/lang/String;", null, l0, l2, 0); mv.visitMaxs(2, 1); mv.visitEnd(); } cv.visitEnd(); Class<?> clazz = new DynamicClassLoader().defineClass("Testing", classWriter.toByteArray()); java.lang.reflect.Method method = clazz.getMethod("main", String[].class); final String[] arguments = new String[] { "hello", "world" }; method.invoke(clazz, (Object) arguments); }
From source file:com.nginious.http.serialize.JsonDeserializerCreator.java
License:Apache License
/** * Creates bytecode for deserializing property matching the specified bean method name. The generated bytecode calls the * appropriate deserialization method in the class {@link JsonDeserializer} depending on the specified method type. * Then generated bytecode that calls the corresponding set method in the bean class. * /*from w ww . j av a2 s . com*/ * @param visitor method visitor for writing bytecode * @param clazzName binary name of class being generated * @param methodName binary name of method in class {@link JsonDeserializer} used for deserializing property * @param methodType binary type of value returned by called deserialization method in {@link JsonDeserializer} * @param beanType binary type for argument in bean method for setting property * @param beanClazzName binary class name of bean for which the deserializer class is being generated * @param beanMethodName binary name of method in bean class for setting property */ private void createPropertyDeserializationCode(MethodVisitor visitor, String clazzName, String methodName, String methodType, String beanType, String beanClazzName, String beanMethodName) { String propertyName = Serialization.createPropertyNameFromMethodName(beanMethodName); visitor.visitVarInsn(Opcodes.ALOAD, 3); visitor.visitVarInsn(Opcodes.ALOAD, 0); visitor.visitVarInsn(Opcodes.ALOAD, 1); visitor.visitLdcInsn(propertyName); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, clazzName, methodName, "(Lorg/json/JSONObject;Ljava/lang/String;)" + methodType); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, beanClazzName, beanMethodName, "(" + beanType + ")V"); }
From source file:com.nginious.http.serialize.JsonSerializerCreator.java
License:Apache License
/** * Creates bytecode for serializing a bean property which returns a collection of opaque objects. * //from w w w . j a v a 2 s. c o m * @param visitor method visitor used for creating bytecode * @param returnType return type of get method in bean * @param intBeanClazzName binary name of bean * @param methodName binary name of get method in bean */ private void createObjectCollectionSerializationCode(MethodVisitor visitor, Class<?> returnType, String intBeanClazzName, String methodName, String propertyName) { visitor.visitTypeInsn(Opcodes.NEW, "com/nginious/http/serialize/JsonObjectCollectionSerializer"); visitor.visitInsn(Opcodes.DUP); visitor.visitMethodInsn(Opcodes.INVOKESPECIAL, "com/nginious/http/serialize/JsonObjectCollectionSerializer", "<init>", "()V"); visitor.visitVarInsn(Opcodes.ASTORE, 4); visitor.visitVarInsn(Opcodes.ALOAD, 4); String intReturnClazzName = returnType.getName().replace('.', '/'); visitor.visitVarInsn(Opcodes.ALOAD, 3); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, intBeanClazzName, methodName, "()L" + intReturnClazzName + ";"); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/JsonObjectCollectionSerializer", "serialize", "(Ljava/util/Collection;)Lorg/json/JSONArray;"); visitor.visitVarInsn(Opcodes.ASTORE, 4); visitor.visitVarInsn(Opcodes.ALOAD, 1); visitor.visitLdcInsn(propertyName); visitor.visitVarInsn(Opcodes.ALOAD, 4); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "org/json/JSONObject", "put", "(Ljava/lang/String;Ljava/lang/Object;)Lorg/json/JSONObject;"); }
From source file:com.nginious.http.serialize.JsonSerializerCreator.java
License:Apache License
/** * Creates bytecode for serializing a bean property which returns a collection of beans that are serializable. Bean serializability * is determined as described in the class description. * // w ww . j av a 2s . com * @param visitor method visitor used for creating bytecode * @param intBeanClazzName binary class name of bean * @param methodName binary name of get method in bean returning collection * @param returnType return type of get method in bean * @param collectionBeanType class of serializable bean found in collection */ private void createBeanCollectionSerializationCode(MethodVisitor visitor, String intBeanClazzName, String methodName, String propertyName, Class<?> returnType, Class<?> collectionBeanType) { visitor.visitVarInsn(Opcodes.ALOAD, 0); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/JsonSerializer", "getSerializerFactory", "()Lcom/nginious/http/serialize/SerializerFactoryImpl;"); visitor.visitLdcInsn(collectionBeanType.getName()); visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Class", "forName", "(Ljava/lang/String;)Ljava/lang/Class;"); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/SerializerFactoryImpl", "createJsonSerializer", "(Ljava/lang/Class;)Lcom/nginious/http/serialize/JsonSerializer;"); visitor.visitVarInsn(Opcodes.ASTORE, 4); visitor.visitTypeInsn(Opcodes.NEW, "com/nginious/http/serialize/JsonBeanCollectionSerializer"); visitor.visitInsn(Opcodes.DUP); visitor.visitVarInsn(Opcodes.ALOAD, 4); visitor.visitMethodInsn(Opcodes.INVOKESPECIAL, "com/nginious/http/serialize/JsonBeanCollectionSerializer", "<init>", "(Lcom/nginious/http/serialize/JsonSerializer;)V"); visitor.visitVarInsn(Opcodes.ASTORE, 5); visitor.visitVarInsn(Opcodes.ALOAD, 5); String intReturnClazzName = returnType.getName().replace('.', '/'); visitor.visitVarInsn(Opcodes.ALOAD, 3); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, intBeanClazzName, methodName, "()L" + intReturnClazzName + ";"); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/JsonBeanCollectionSerializer", "serialize", "(Ljava/util/Collection;)Lorg/json/JSONArray;"); visitor.visitVarInsn(Opcodes.ASTORE, 5); visitor.visitVarInsn(Opcodes.ALOAD, 1); visitor.visitLdcInsn(propertyName); visitor.visitVarInsn(Opcodes.ALOAD, 5); visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "org/json/JSONObject", "put", "(Ljava/lang/String;Ljava/lang/Object;)Lorg/json/JSONObject;"); }