Examples with MethodVisitor org.simpleflatmapper.ow2asm.MethodVisitor used on opensource projects

Example 26 with MethodVisitor

use of org.simpleflatmapper.ow2asm.MethodVisitor in project SimpleFlatMapper by arnaudroger.

the class GetterBuilder method createObjectGetter.

public static byte[] createObjectGetter(final String className, final Method method) throws Exception {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    MethodVisitor mv;
    Class<?> target = method.getDeclaringClass();
    Class<?> property = method.getReturnType();
    String targetType = toType(target);
    String propertyType = toType(property);
    String classType = toType(className);
    cw.visit(V1_6, ACC_PUBLIC + ACC_FINAL + ACC_SUPER, classType, "Ljava/lang/Object;L" + GETTER_TYPE + "<L" + targetType + ";" + AsmUtils.toTargetTypeDeclaration(propertyType) + ">;", "java/lang/Object", new String[] { GETTER_TYPE });
    {
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
        mv.visitInsn(RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "get", "(" + AsmUtils.toTargetTypeDeclaration(targetType) + ")" + AsmUtils.toTargetTypeDeclaration(propertyType), null, new String[] { "java/lang/Exception" });
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 1);
        AsmUtils.invoke(mv, target, method.getName(), "()" + AsmUtils.toTargetTypeDeclaration(propertyType));
        mv.visitInsn(ARETURN);
        mv.visitMaxs(1, 2);
        mv.visitEnd();
    }
    appendBridge(cw, targetType, propertyType, classType);
    appendToString(cw);
    cw.visitEnd();
    return AsmUtils.writeClassToFile(className, cw.toByteArray());
}

Example 27 with MethodVisitor

use of org.simpleflatmapper.ow2asm.MethodVisitor in project SimpleFlatMapper by arnaudroger.

the class InstantiatorBuilder method appendToString.

private static <S> void appendToString(Map<Parameter, Getter<? super S, ?>> injections, ClassWriter cw, Parameter[] parameters) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
    mv.visitCode();
    mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V", false);
    mv.visitVarInsn(ASTORE, 1);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;", false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getSimpleName", "()Ljava/lang/String;", false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    mv.visitLdcInsn("{");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    for (int i = 0; i < parameters.length; i++) {
        String paramName = (i > 0 ? ", " : "") + "parameter" + i + "=";
        String parameter = String.valueOf(parameters[i]);
        mv.visitLdcInsn(paramName);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
        mv.visitLdcInsn(parameter);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
        Getter<? super S, ?> getter = injections.get(parameters[i]);
        String getterName = ", parameter" + i + "=";
        String getterString = String.valueOf(getter);
        mv.visitLdcInsn(getterName);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
        mv.visitLdcInsn(getterString);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    }
    mv.visitLdcInsn("}");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(2, 1);
    mv.visitEnd();
}

Example 28 with MethodVisitor

use of org.simpleflatmapper.ow2asm.MethodVisitor in project SimpleFlatMapper by arnaudroger.

the class InstantiatorBuilder method appendBridgeMethod.

private static void appendBridgeMethod(ClassWriter cw, String targetType, String sourceType, String classType) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC + ACC_BRIDGE + ACC_SYNTHETIC, "newInstance", "(Ljava/lang/Object;)Ljava/lang/Object;", null, new String[] { "java/lang/Exception" });
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(CHECKCAST, sourceType);
    mv.visitMethodInsn(INVOKEVIRTUAL, classType, "newInstance", "(" + AsmUtils.toTargetTypeDeclaration(sourceType) + ")" + AsmUtils.toTargetTypeDeclaration(targetType), false);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(2, 2);
    mv.visitEnd();
}

Example 29 with MethodVisitor

use of org.simpleflatmapper.ow2asm.MethodVisitor in project SimpleFlatMapper by arnaudroger.

the class InstantiatorBuilder method appendNewInstanceBuilderOnBuilder.

private static <S> void appendNewInstanceBuilderOnBuilder(Class<?> sourceClass, BuilderInstantiatorDefinition instantiatorDefinition, Map<Parameter, Getter<? super S, ?>> injections, ClassWriter cw, String targetType, String sourceType, String classType, Map<Parameter, Method> setters, boolean ignoreNullValues) throws NoSuchMethodException {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC, "newInstance", "(" + AsmUtils.toTargetTypeDeclaration(sourceType) + ")" + AsmUtils.toTargetTypeDeclaration(targetType), null, new String[] { "java/lang/Exception" });
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, classType, "builderInstantiator", AsmUtils.toTargetTypeDeclaration(Instantiator.class));
    mv.visitInsn(ACONST_NULL);
    mv.visitMethodInsn(INVOKEINTERFACE, AsmUtils.toAsmType(Instantiator.class), "newInstance", "(Ljava/lang/Object;)Ljava/lang/Object;", true);
    final Type builderClass = BiInstantiatorBuilder.getTargetType(instantiatorDefinition.getBuilderInstantiator());
    final String builderType = AsmUtils.toAsmType(builderClass);
    mv.visitTypeInsn(CHECKCAST, builderType);
    mv.visitVarInsn(ASTORE, 2);
    boolean first = true;
    for (final Entry<Parameter, Method> e : setters.entrySet()) {
        Parameter p = e.getKey();
        Getter<? super S, ?> getter = injections.get(p);
        if (getter != null) {
            final Class<?> parameterType = p.getType();
            final boolean checkIfNull = ignoreNullValues && !getGetterCall(parameterType, getter.getClass()).isPrimitive;
            mv.visitVarInsn(ALOAD, 2);
            invokeGetter(p, getter, classType, sourceClass, mv, new Consumer<MethodVisitor>() {

                @Override
                public void accept(MethodVisitor mv) {
                    if (checkIfNull) {
                        mv.visitVarInsn(ALOAD, 2);
                        mv.visitVarInsn(AsmUtils.getLoadOps(parameterType), 3);
                    }
                    AsmUtils.invoke(mv, TypeHelper.toClass(builderClass), e.getValue().getName(), AsmUtils.toSignature(e.getValue()));
                    if (!Void.TYPE.equals(e.getValue().getReturnType())) {
                        mv.visitVarInsn(ASTORE, 2);
                    }
                }
            }, ignoreNullValues);
            if (checkIfNull) {
                if (first && !Void.TYPE.equals(e.getValue().getReturnType())) {
                    mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { builderType }, 0, null);
                } else {
                    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
                }
                first = false;
            }
        }
    }
    mv.visitVarInsn(ALOAD, 2);
    AsmUtils.invoke(mv, TypeHelper.toClass(builderClass), instantiatorDefinition.getBuildMethod().getName(), AsmUtils.toSignature(instantiatorDefinition.getBuildMethod()));
    mv.visitInsn(ARETURN);
    mv.visitMaxs(3, 2);
    mv.visitEnd();
}

Example 30 with MethodVisitor

use of org.simpleflatmapper.ow2asm.MethodVisitor in project SimpleFlatMapper by arnaudroger.

the class InstantiatorBuilder method appendNewInstanceBuilderOnMethod.

private static <S> void appendNewInstanceBuilderOnMethod(Class<?> sourceClass, ExecutableInstantiatorDefinition instantiatorDefinition, Map<Parameter, Getter<? super S, ?>> injections, ClassWriter cw, String targetType, String sourceType, String classType, Parameter[] parameters) throws NoSuchMethodException {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC, "newInstance", "(" + AsmUtils.toTargetTypeDeclaration(sourceType) + ")" + AsmUtils.toTargetTypeDeclaration(targetType), null, new String[] { "java/lang/Exception" });
    mv.visitCode();
    mv.visitTypeInsn(NEW, targetType);
    mv.visitInsn(DUP);
    StringBuilder sb = new StringBuilder();
    for (Parameter p : parameters) {
        Getter<? super S, ?> getter = injections.get(p);
        sb.append(AsmUtils.toTargetTypeDeclaration(p.getType()));
        if (getter == null) {
            if (TypeHelper.isPrimitive(p.getType())) {
                mv.visitInsn(AsmUtils.defaultValue.get(p.getType()));
            } else {
                mv.visitInsn(ACONST_NULL);
            }
        } else {
            invokeGetter(p, getter, classType, sourceClass, mv, null, false);
        }
    }
    Member exec = instantiatorDefinition.getExecutable();
    if (exec instanceof Constructor) {
        mv.visitMethodInsn(INVOKESPECIAL, targetType, "<init>", "(" + sb.toString() + ")V", false);
    } else {
        mv.visitMethodInsn(INVOKESTATIC, AsmUtils.toAsmType(((Method) exec).getDeclaringClass()), exec.getName(), AsmUtils.toSignature((Method) exec), false);
    }
    mv.visitInsn(ARETURN);
    mv.visitMaxs(3, 2);
    mv.visitEnd();
}