Example usage for org.objectweb.asm Opcodes ARETURN

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes ARETURN.

Prototype

int ARETURN

To view the source code for org.objectweb.asm Opcodes ARETURN.

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Usage

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Generates code://www  .  j a  v a  2 s . c  o m
 * 
 * public Class<?>[] _asActionInterceptors(String name) {
 *    return _asInterceptors.get(name);
 * }
 */
public void createActionInterceptorsMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asActionInterceptors",
            "(Ljava/lang/String;)[Ljava/lang/Class;", null, null);

    Label l0 = new Label();
    Label l1 = new Label();
    mv.visitLabel(l0);
    mv.visitFieldInsn(Opcodes.GETSTATIC, reflector.getClazzInternalName(), "_asInterceptors",
            "Ljava/util/Map;");
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/Map", "get",
            "(Ljava/lang/Object;)Ljava/lang/Object;", true);
    mv.visitTypeInsn(Opcodes.CHECKCAST, "[Ljava/lang/Class;");
    mv.visitInsn(Opcodes.ARETURN);

    mv.visitLabel(l1);
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, l0, l1, 0);
    mv.visitLocalVariable("name", "Ljava/lang/String;", null, l0, l1, 1);
    mv.visitMaxs(2, 2);

    mv.visitEnd();
}

---

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Generates the code://w w w. ja v  a  2 s .c o  m
 * public Map<String, Class<?>> _asParameters() {
 *    return _asParameters;
 * }
 */
private void createParametersMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asParameters", "()Ljava/util/Map;",
            "()Ljava/util/Map<Ljava/lang/String;Ljava/lang/Class<*>;>;", null);
    mv.visitCode();
    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitFieldInsn(Opcodes.GETSTATIC, reflector.getClazzInternalName(), "_asParameters", "Ljava/util/Map;");
    mv.visitInsn(Opcodes.ARETURN);
    Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, l0, l1, 0);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

---

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Generates the _asParameter() getter as
 * //  w w w.  j a v  a2s . c  o m
 * public Object _asParameter(String name) {
 *    if(name.equals("name"))
 *       return getName();
 *    if(name.equals("date"))
 *       return getDate();
 *    ...
 *    return null;
 * }
 */
private void createParametersGetterMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asParameter",
            "(Ljava/lang/String;)Ljava/lang/Object;", null, null);

    Label start = new Label();
    Label next = new Label();
    Label variable = new Label();
    boolean first = true;

    for (String name : reflector.getParameters().keySet()) {
        Label l0 = null;
        Label l1 = new Label();

        if (first) {
            l0 = new Label();
            first = false;
        } else {
            l0 = next;
            next = new Label();
        }

        mv.visitLabel(l0);
        if (!first)
            mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitLdcInsn(name);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
        mv.visitJumpInsn(Opcodes.IFEQ, next);

        String methodGetterName = reflector.getGetters().get(name).getName();
        String methodGetterDesc = "()" + Type.getDescriptor(reflector.getParameters().get(name));

        mv.visitLabel(l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), methodGetterName,
                methodGetterDesc, false);
        mv.visitInsn(Opcodes.ARETURN);
    }

    mv.visitLabel(next);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitInsn(Opcodes.ACONST_NULL);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitLabel(variable);
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, start, variable, 0);
    mv.visitLocalVariable("name", "Ljava/lang/String;", null, start, variable, 1);
    mv.visitMaxs(2, 2);
    mv.visitEnd();
}

---

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * public Class<?> _asParameterConverter(String name) {
 *    return _asConverters.get(name);/*from w  w  w .ja v a  2  s .c o m*/
 * }
 */
public void createParameterConverterMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asParameterConverter",
            "(Ljava/lang/String;)Ljava/lang/Class;", null, null);
    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitFieldInsn(Opcodes.GETSTATIC, reflector.getClazzInternalName(), "_asConverters", "Ljava/util/Map;");
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/Map", "get",
            "(Ljava/lang/Object;)Ljava/lang/Object;", true);
    mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Class");
    mv.visitInsn(Opcodes.ARETURN);

    Label l1 = new Label();
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, l0, l1, 0);
    mv.visitLocalVariable("name", "Ljava/lang/String;", null, l0, l1, 1);
    mv.visitMaxs(2, 2);
    mv.visitEnd();
}

---

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Generates the _asUrl() method with using a constant string
 * public String _asUrl() { return "/*"; }
 *///from   ww  w .jav a  2  s.c o m
public void createUrlMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asUrl", "()Ljava/lang/String;", null, null);
    mv.visitCode();
    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitLdcInsn(reflector.getUrl());
    mv.visitInsn(Opcodes.ARETURN);
    Label l1 = new Label();
    mv.visitLocalVariable("this", Type.getDescriptor(reflector.getClazz()), null, l0, l1, 0);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

---

From source file:io.syncframework.optimizer.OInterceptorClassVisitor.java

License:Apache License

/**
 * Generates the code:/*from  w  w w  . j a  va2 s  . c o  m*/
 * 
 * public Result _asAfter() {
 *    return after();
 * }
 */
public void createAfterMethod() {
    String signature = "()" + Type.getDescriptor(Result.class);
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asAfter", signature, null, null);
    Label l0 = new Label();

    if (reflector.getAfter() != null) {
        mv.visitLabel(l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), "after", signature, false);
        mv.visitInsn(Opcodes.ARETURN);
    } else {
        mv.visitLabel(l0);
        mv.visitInsn(Opcodes.ACONST_NULL);
        mv.visitInsn(Opcodes.ARETURN);
    }

    Label l1 = new Label();
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, l0, l1, 0);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

---

From source file:io.syncframework.optimizer.OInterceptorClassVisitor.java

License:Apache License

/**
 * Generates the code:/* w  w  w.  j a  v  a  2  s . com*/
 * 
 * public Result _asBefore() {
 *    return before();
 * }
 */
public void createBeforeMethod() {
    String signature = "()" + Type.getDescriptor(Result.class);
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asBefore", signature, null, null);
    Label l0 = new Label();

    if (reflector.getAfter() != null) {
        mv.visitLabel(l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), "before", signature, false);
        mv.visitInsn(Opcodes.ARETURN);
    } else {
        mv.visitLabel(l0);
        mv.visitInsn(Opcodes.ACONST_NULL);
        mv.visitInsn(Opcodes.ARETURN);
    }

    Label l1 = new Label();
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, l0, l1, 0);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

---

From source file:jasy.lang.ASMCompiler.java

private static boolean isReturn(int opcode) {
    switch (opcode) {
    case Opcodes.ARETURN:
    case Opcodes.DRETURN:
    case Opcodes.FRETURN:
    case Opcodes.IRETURN:
    case Opcodes.RET:
    case Opcodes.RETURN:
        return true;
    }//  ww  w  . jav  a 2s.c  o  m

    return false;
}

---

From source file:jasy.lang.ASMCompiler.java

private static int getReturn(Class<?> type) {
    String typeDescriptor = Type.getDescriptor(type);
    switch (typeDescriptor) {
    case "V":
        return Opcodes.RETURN;
    case "J":
        return Opcodes.LRETURN;
    case "D":
        return Opcodes.DRETURN;
    case "F":
        return Opcodes.FRETURN;
    case "I":
    case "Z":
    case "B":
    case "C":
    case "S":
        return Opcodes.IRETURN;
    default://from   w  w  w .  j ava  2 s.  co  m
        return Opcodes.ARETURN;
    }
}

---

From source file:jerl.bcm.inj.InjectionMethodAdapter.java

License:Apache License

@Override
public void visitInsn(int opcode) {
    incByteCodeCounter();//w  w  w.  j  ava2 s . co  m
    if (opcode == Opcodes.IRETURN || opcode == Opcodes.LRETURN || opcode == Opcodes.FRETURN
            || opcode == Opcodes.DRETURN || opcode == Opcodes.ARETURN || opcode == Opcodes.RETURN) {
        for (int i = 0; i < exitInjections.size(); i++) {
            InjectionMethodExit ime = (InjectionMethodExit) exitInjections.elementAt(i);
            ime.inject(mv);
            if (isDebugMode) {
                System.out.println("\t**Inject: " + ime);
            }
        }
    }
    mv.visitInsn(opcode);
}

---

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