Example usage for org.objectweb.asm MethodVisitor visitLabel

Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitLabel.

Prototype

public void visitLabel(final Label label) 

Source Link

Document

Visits a label.

Usage

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate a method of the generated class
 * /*from  w  ww  . j ava2  s . co m*/
 * @param p_ClassWriter
 *            The {@link ClassWriter} of the generated class
 * @param p_ClassName
 *            The name of the class
 * @param p_Method
 *            the method to generate
 * @param p_MethodDescriptor
 *            The method descriptor
 */
private void generateMethodEquals(ClassWriter p_ClassWriter, String p_ClassName, Method p_Method,
        String p_MethodDescriptor) {
    MethodVisitor mv = p_ClassWriter.visitMethod(ACC_PUBLIC, "equals", "(Ljava/lang/Object;)Z", null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(INSTANCEOF, "ldapbeans/bean/LdapBean");
    Label l0 = new Label();
    mv.visitJumpInsn(IFEQ, l0);
    mv.visitVarInsn(ALOAD, 1);
    Label l1 = new Label();
    mv.visitJumpInsn(IFNULL, l1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEINTERFACE, "ldapbeans/bean/LdapBean", "getDN", "()Ljava/lang/String;");
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(CHECKCAST, "ldapbeans/bean/LdapBean");
    mv.visitMethodInsn(INVOKEINTERFACE, "ldapbeans/bean/LdapBean", "getDN", "()Ljava/lang/String;");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z");
    mv.visitJumpInsn(IFEQ, l1);
    mv.visitInsn(ICONST_1);
    mv.visitInsn(IRETURN);
    mv.visitLabel(l1);
    mv.visitInsn(ICONST_0);
    mv.visitInsn(IRETURN);
    mv.visitLabel(l0);
    mv.visitInsn(ICONST_0);
    mv.visitInsn(IRETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

---

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate a method of the generated class
 * /*ww w.java 2s.  c o m*/
 * @param p_MethodVisitor
 *            The {@link MethodVisitor} of the generated method
 * @param p_ClassName
 *            The name of the class
 * @param p_Method
 *            the generated method
 * @param p_StartIndex
 *            First index of the stack after parameters
 * @param p_LdapAttribute
 *            The LdapAttribute that will be used for generating the method
 */
private void generateMethodSetterInitializeAttribute(MethodVisitor p_MethodVisitor, String p_ClassName,
        Method p_Method, int p_StartIndex, LdapAttribute p_LdapAttribute) {
    MethodVisitor mv = p_MethodVisitor;
    String attributeName = p_LdapAttribute.value();
    // Attributes attributes = m_LdapObject.getAttributes();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, INTERNAL_PACKAGE_NAME + '/' + p_ClassName, "m_LdapObject",
            "Lldapbeans/bean/LdapObject;");
    mv.visitMethodInsn(INVOKEVIRTUAL, "ldapbeans/bean/LdapObject", "getAttributes",
            "()Ljavax/naming/directory/Attributes;");
    mv.visitVarInsn(ASTORE, p_StartIndex + 2);
    // Attribute attribute = attributes.get("attributeName");
    mv.visitVarInsn(ALOAD, p_StartIndex + 2);
    mv.visitLdcInsn(attributeName);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/directory/Attributes", "get",
            "(Ljava/lang/String;)Ljavax/naming/directory/Attribute;");
    mv.visitVarInsn(ASTORE, p_StartIndex + 3);
    // if (attribute == null) {
    mv.visitVarInsn(ALOAD, p_StartIndex + 3);
    Label l0 = new Label();
    mv.visitJumpInsn(IFNONNULL, l0);
    // attribute = new BasicAttribute("attributeName");
    mv.visitTypeInsn(NEW, "javax/naming/directory/BasicAttribute");
    mv.visitInsn(DUP);
    mv.visitLdcInsn(attributeName);
    mv.visitMethodInsn(INVOKESPECIAL, "javax/naming/directory/BasicAttribute", "<init>",
            "(Ljava/lang/String;)V");
    mv.visitVarInsn(ASTORE, p_StartIndex + 3);
    // attributes.put(attribute);
    mv.visitVarInsn(ALOAD, p_StartIndex + 2);
    mv.visitVarInsn(ALOAD, p_StartIndex + 3);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/directory/Attributes", "put",
            "(Ljavax/naming/directory/Attribute;)" + "Ljavax/naming/directory/Attribute;");
    mv.visitInsn(POP);
    if (!p_Method.getName().startsWith("add")) {
        /*
         * If method is not an adder (but a simple setter), attribute has to
         * be cleared
         */
        // } else {
        Label l1 = new Label();
        mv.visitJumpInsn(GOTO, l1);
        mv.visitLabel(l0);
        // attribute.clear();
        mv.visitVarInsn(ALOAD, p_StartIndex + 3);
        mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/directory/Attribute", "clear", "()V");
        // }
        mv.visitLabel(l1);
    } else {
        // }
        mv.visitLabel(l0);
    }
}

---

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate a portion of a method of the generated class
 * /*  w  ww . j  a  v  a 2 s .  c o  m*/
 * @param p_MethodVisitor
 *            The {@link MethodVisitor} of the generated method
 * @param p_ClassName
 *            The name of the class
 * @param p_Method
 *            the generated method
 * @param p_ParamIndex
 *            index of the parameter to convert
 * @param p_StartIndex
 *            first index of the stack after parameters
 * @param p_LdapAttribute
 *            The LdapAttribute that will be used for generating the method
 * @param p_ParameterType
 *            The type of the parameter
 */
private void generateMethodSetterAssignValue(MethodVisitor p_MethodVisitor, String p_ClassName, Method p_Method,
        int p_ParamIndex, int p_StartIndex, LdapAttribute p_LdapAttribute, Class<?> p_ParameterType) {
    MethodVisitor mv = p_MethodVisitor;
    int paramStackIndex = getStackIndexOfParameter(p_Method, p_ParamIndex);
    ConvertAttribute annotation = getConvertAttributeAnnotation(p_Method)[p_ParamIndex];

    if (Collection.class.isAssignableFrom(p_ParameterType)) {
        /*
         * The parameter is a collection, each element of the collection
         * will be added
         */
        // Iterator it = p_AttributeValue.iterator();
        mv.visitVarInsn(ALOAD, paramStackIndex);
        mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Collection", "iterator", "()Ljava/util/Iterator;");
        mv.visitVarInsn(ASTORE, p_StartIndex + 5);
        // while(it.hasNext()) {
        Label l2 = new Label();
        mv.visitLabel(l2);
        mv.visitVarInsn(ALOAD, p_StartIndex + 5);
        mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z");
        Label l3 = new Label();
        mv.visitJumpInsn(IFEQ, l3);

        // Object value = it.next();
        mv.visitVarInsn(ALOAD, p_StartIndex + 5);
        mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;");
        mv.visitVarInsn(ASTORE, p_StartIndex + 4);
        // convert value to String
        // TODO : Find another way to convert object
        generateMethodSetterAssignValueConvert(mv, p_ClassName, p_Method, p_StartIndex + 4, p_StartIndex,
                p_LdapAttribute, annotation, Object.class);
        generateMethodSetterAssignValueToTempArray(mv, p_ClassName, p_Method, p_StartIndex + 4, p_StartIndex);
        // }
        mv.visitJumpInsn(GOTO, l2);
        mv.visitLabel(l3);
    } else if (p_ParameterType.isArray()) {
        // TODO
        // int i=0;
        mv.visitInsn(ICONST_0);
        mv.visitVarInsn(ISTORE, p_StartIndex + 5);
        // while(i<values.length) {
        Label l0 = new Label();
        Label l1 = new Label();
        mv.visitLabel(l0);
        mv.visitVarInsn(ILOAD, p_StartIndex + 5);
        mv.visitVarInsn(ALOAD, paramStackIndex);
        mv.visitInsn(ARRAYLENGTH);
        mv.visitJumpInsn(IF_ICMPGE, l1);
        // value = values[i];
        mv.visitVarInsn(ALOAD, paramStackIndex);
        mv.visitVarInsn(ILOAD, p_StartIndex + 1);
        mv.visitInsn(AALOAD);
        mv.visitVarInsn(ASTORE, p_StartIndex + 4);
        // convert value to String
        generateMethodSetterAssignValueConvert(mv, p_ClassName, p_Method, p_StartIndex + 4, p_StartIndex,
                p_LdapAttribute, annotation, p_ParameterType.getComponentType());
        generateMethodSetterAssignValueToTempArray(mv, p_ClassName, p_Method, p_StartIndex + 4, p_StartIndex);
        // i++;
        mv.visitIincInsn(p_StartIndex + 5, 1);
        // }
        mv.visitJumpInsn(GOTO, l0);
        mv.visitLabel(l1);
    } else {
        generateMethodSetterAssignValueConvert(mv, p_ClassName, p_Method, paramStackIndex, p_StartIndex,
                p_LdapAttribute, annotation, p_ParameterType);
        generateMethodSetterAssignValueToTempArray(mv, p_ClassName, p_Method, p_StartIndex + 4, p_StartIndex);
    }
}

---

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate a method of the generated class
 * /*ww w .  j  a v a  2 s  . c  o m*/
 * @param p_MethodVisitor
 *            The {@link MethodVisitor} of the generated method
 * @param p_ClassName
 *            The name of the class
 * @param p_Method
 *            the generated method
 * @param p_StartIndex
 *            First index of the stack after parameters
 * @param p_LdapAttribute
 *            LdapAttribute of the generated method
 */
private void generateMethodSetterAssignResult(MethodVisitor p_MethodVisitor, String p_ClassName,
        Method p_Method, int p_StartIndex, LdapAttribute p_LdapAttribute) {
    MethodVisitor mv = p_MethodVisitor;
    if (p_LdapAttribute.pattern().length() == 0) {
        // int i=0;
        mv.visitInsn(ICONST_0);
        mv.visitVarInsn(ISTORE, p_StartIndex + 1);
        // {
        Label l0 = new Label();
        mv.visitJumpInsn(GOTO, l0);
        Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitVarInsn(ALOAD, p_StartIndex + 3);
        // value = tempValues[i];
        mv.visitVarInsn(ALOAD, p_StartIndex);
        mv.visitVarInsn(ILOAD, p_StartIndex + 1);
        mv.visitInsn(AALOAD);
        // attribute.add(value);
        mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/directory/Attribute", "add", "(Ljava/lang/Object;)Z");
        mv.visitInsn(POP);
        // i++
        mv.visitIincInsn(p_StartIndex + 1, 1);
        // }
        mv.visitLabel(l0);
        // i < tempValues.length
        mv.visitVarInsn(ILOAD, p_StartIndex + 1);
        mv.visitVarInsn(ALOAD, p_StartIndex);
        mv.visitInsn(ARRAYLENGTH);
        mv.visitJumpInsn(IF_ICMPLT, l1);
    } else {
        mv.visitVarInsn(ALOAD, p_StartIndex + 3);
        mv.visitLdcInsn(p_LdapAttribute.pattern());
        mv.visitVarInsn(ALOAD, p_StartIndex);
        mv.visitMethodInsn(INVOKESTATIC, "ldapbeans/util/StringUtil", "format",
                "(Ljava/lang/String;[Ljava/lang/Object;)" + "Ljava/lang/String;");
        // attribute.add(value);
        mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/directory/Attribute", "add", "(Ljava/lang/Object;)Z");
        mv.visitInsn(POP);
    }

}

---

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate a portion of a method of the generated class
 * /*from w  w w . ja v  a2s. c o  m*/
 * @param p_MethodVisitor
 *            The {@link MethodVisitor} of the generated method
 * @param p_ObjectStackIndex
 *            index of the object to convert in the stack
 * @param p_StartIndex
 *            first index of the stack after parameters
 * @param p_LdapAttribute
 *            The LdapAttribute that will be used for generating the method
 * @param p_OriginalType
 *            The type before conversion
 */
private void generateMethodSetterAssignValueConvertBoolean(MethodVisitor p_MethodVisitor,
        int p_ObjectStackIndex, int p_StartIndex, LdapAttribute p_LdapAttribute, Class<?> p_OriginalType) {
    MethodVisitor mv = p_MethodVisitor;
    if (Boolean.class.equals(p_OriginalType)) {
        mv.visitVarInsn(ALOAD, p_ObjectStackIndex);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z");
    } else {
        mv.visitVarInsn(ILOAD, p_ObjectStackIndex);
    }
    Label l2 = new Label();
    mv.visitJumpInsn(IFEQ, l2);
    mv.visitLdcInsn(p_LdapAttribute.trueValue()[0]);
    Label l3 = new Label();
    mv.visitJumpInsn(GOTO, l3);
    mv.visitLabel(l2);
    mv.visitLdcInsn(p_LdapAttribute.falseValue()[0]);
    mv.visitLabel(l3);
    mv.visitVarInsn(ASTORE, p_StartIndex + 4);
}

---

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate a method of the generated class
 * /*from w  w w  .  ja va 2s  .co  m*/
 * @param p_MethodVisitor
 *            The {@link MethodVisitor} of the generated method
 * @param p_ClassName
 *            The name of the class
 * @param p_LdapAttribute
 *            The LdapAttribute that will be used for generating the method
 * @param p_ReturnType
 *            The type of the result
 */
private void generateMethodGetterLdapValue(MethodVisitor p_MethodVisitor, String p_ClassName,
        LdapAttribute p_LdapAttribute, Class<?> p_ReturnType) {
    MethodVisitor mv = p_MethodVisitor;
    String attributeName = p_LdapAttribute.value();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "javax/naming/NamingException");
    // Attributes attributes = m_LdapObject.getAttributes();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, INTERNAL_PACKAGE_NAME + '/' + p_ClassName, "m_LdapObject",
            "Lldapbeans/bean/LdapObject;");
    mv.visitMethodInsn(INVOKEVIRTUAL, "ldapbeans/bean/LdapObject", "getAttributes",
            "()Ljavax/naming/directory/Attributes;");
    mv.visitVarInsn(ASTORE, 3);
    // Attribute attribute = attributes.get("attributeName");
    mv.visitVarInsn(ALOAD, 3);
    mv.visitLdcInsn(attributeName);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/directory/Attributes", "get",
            "(Ljava/lang/String;)Ljavax/naming/directory/Attribute;");
    mv.visitVarInsn(ASTORE, 4);
    // try {
    mv.visitLabel(l0);
    // if (attribute != null) {
    Label l3 = new Label();
    mv.visitVarInsn(ALOAD, 4);
    mv.visitJumpInsn(IFNULL, l3);
    generateMethodGetterAssignResult(mv, p_ClassName, p_LdapAttribute, p_ReturnType);
    // }
    mv.visitLabel(l1);
    mv.visitJumpInsn(GOTO, l3);
    // } catch(NamingException e) {
    mv.visitLabel(l2);
    mv.visitVarInsn(ASTORE, 5);
    // throw new IllegalArgumentException()
    // TODO: change the message
    generateThrowingIllegalArgumentException(p_MethodVisitor, "Error when trying to get value");
    // }
    mv.visitLabel(l3);
}

---

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate a portion of a method of the generated class
 * //  w  w  w .ja  v  a 2 s. c om
 * @param p_MethodVisitor
 *            The {@link MethodVisitor} of the generated method
 * @param p_ClassName
 *            Name of the generated class
 * @param p_LdapAttribute
 *            The LdapAttribute that will be used for generating the method
 * @param p_ReturnType
 *            The type of the result
 */
private void generateMethodGetterAssignResultCollection(MethodVisitor p_MethodVisitor, String p_ClassName,
        LdapAttribute p_LdapAttribute, Class<?> p_ReturnType) {
    MethodVisitor mv = p_MethodVisitor;
    // NamingEnumeration<?> enumeration = attribute.getAll();
    mv.visitVarInsn(ALOAD, 4);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/directory/Attribute", "getAll",
            "()Ljavax/naming/NamingEnumeration;");
    mv.visitVarInsn(ASTORE, 5);
    // result = new [Collection](attribute.size());
    generateMethodGetterInitializeResult(p_MethodVisitor, p_ReturnType);
    // while (enumeration.hasMoreElements()) {
    Label l4 = new Label();
    mv.visitLabel(l4);
    mv.visitVarInsn(ALOAD, 5);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/NamingEnumeration", "hasMoreElements", "()Z");
    Label l5 = new Label();
    mv.visitJumpInsn(IFEQ, l5);
    // result.add(enumeration.nextElement());
    mv.visitVarInsn(ALOAD, 5);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/NamingEnumeration", "nextElement",
            "()Ljava/lang/Object;");
    mv.visitVarInsn(ASTORE, 6);
    generateConvert(p_MethodVisitor, p_ClassName, p_LdapAttribute, p_LdapAttribute.componentType(), 6, 7);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 7);
    mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Collection", "add", "(Ljava/lang/Object;)Z");
    mv.visitInsn(POP);
    // }
    mv.visitJumpInsn(GOTO, l4);
    mv.visitLabel(l5);
    // enumeration.close();
    mv.visitVarInsn(ALOAD, 5);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/NamingEnumeration", "close", "()V");
}

---

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate a portion of a method of the generated class
 * //from   www . j  a  v a 2  s.  c  o m
 * @param p_MethodVisitor
 *            The {@link MethodVisitor} of the generated method
 * @param p_ClassName
 *            Name of the generated class
 * @param p_LdapAttribute
 *            The LdapAttribute that will be used for generating the method
 * @param p_ReturnType
 *            The type of the result
 */
private void generateMethodGetterAssignResultArray(MethodVisitor p_MethodVisitor, String p_ClassName,
        LdapAttribute p_LdapAttribute, Class<?> p_ReturnType) {
    MethodVisitor mv = p_MethodVisitor;
    // NamingEnumeration<?> enumeration = attribute.getAll();
    mv.visitVarInsn(ALOAD, 4);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/directory/Attribute", "getAll",
            "()Ljavax/naming/NamingEnumeration;");
    mv.visitVarInsn(ASTORE, 5);
    // result = new Object[attribute.size()];
    generateMethodGetterInitializeResult(p_MethodVisitor, p_ReturnType);
    // int i = 0;
    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ISTORE, 6);
    // while (enumeration.hasMoreElements()) {
    Label l4 = new Label();
    mv.visitLabel(l4);
    mv.visitVarInsn(ALOAD, 5);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/NamingEnumeration", "hasMoreElements", "()Z");
    Label l5 = new Label();
    mv.visitJumpInsn(IFEQ, l5);
    // tmp = enumeration.nextElement();
    mv.visitVarInsn(ALOAD, 5);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/NamingEnumeration", "nextElement",
            "()Ljava/lang/Object;");
    mv.visitVarInsn(ASTORE, 7);
    generateConvert(p_MethodVisitor, p_ClassName, p_LdapAttribute, p_ReturnType.getComponentType(), 7, 8);
    // result[i++] = tmp;
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ILOAD, 6);
    mv.visitIincInsn(6, 1);
    mv.visitVarInsn(ALOAD, 8);
    mv.visitInsn(AASTORE);
    // }
    mv.visitJumpInsn(GOTO, l4);
    mv.visitLabel(l5);
    // enumeration.close();
    mv.visitVarInsn(ALOAD, 5);
    mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/NamingEnumeration", "close", "()V");
}

---

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate code to convert ldapAttribute witch is on the to of the stack to
 * the type of the result/*from  w  w  w. ja  va2 s . c om*/
 * 
 * @param p_MethodVisitor
 *            The {@link MethodVisitor} of the generated method
 * @param p_ClassName
 *            Name of the generated class
 * @param p_LdapAttribute
 *            The LdapAttribute that will be used for generating the method
 * @param p_ReturnType
 *            The type of the result
 * @param p_Object
 *            Index of the object to convert on the stack
 * @param p_Result
 *            Index of the converted object on the stack
 */
private void generateConvert(MethodVisitor p_MethodVisitor, String p_ClassName, LdapAttribute p_LdapAttribute,
        Class<?> p_ReturnType, int p_Object, int p_Result) {
    MethodVisitor mv = p_MethodVisitor;
    Label l0 = new Label();
    Label l1 = new Label();
    if (p_ReturnType != null) {
        // if(value != null) {
        mv.visitVarInsn(ALOAD, p_Object);
        mv.visitJumpInsn(IFNULL, l0);
        if (String.class.isAssignableFrom(p_ReturnType)) {
            generateConvertToString(p_MethodVisitor, p_ClassName, p_ReturnType, p_Object, p_Result);
        } else if (LdapBean.class.isAssignableFrom(p_ReturnType)) {
            generateConvertToLdapBean(p_MethodVisitor, p_ClassName, p_LdapAttribute, p_ReturnType, p_Object,
                    p_Result);
        } else if (boolean.class.isAssignableFrom(p_ReturnType)
                || Boolean.class.isAssignableFrom(p_ReturnType)) {
            generateConvertToBoolean(p_MethodVisitor, p_ClassName, p_LdapAttribute, p_ReturnType, p_Object,
                    p_Result);
        } else if (Number.class.isAssignableFrom(p_ReturnType)) {
            generateConvertToNumber(p_MethodVisitor, p_ClassName, p_LdapAttribute, p_ReturnType, p_Object,
                    p_Result);
        } else if (p_ReturnType.isPrimitive()) {
            generateConvertToPrimitive(p_MethodVisitor, p_ClassName, p_LdapAttribute, p_ReturnType, p_Object,
                    p_Result);
        } else if (Character.class.isAssignableFrom(p_ReturnType)) {
            // result = Character.valueOf(object.toString().charAt(0));
            mv.visitVarInsn(ALOAD, p_Object);
            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
            mv.visitInsn(ICONST_0);
            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "charAt", "(I)C");
            mv.visitMethodInsn(INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;");
            mv.visitVarInsn(ASTORE, p_Result);
        } else {
            mv.visitVarInsn(ALOAD, p_Object);
            mv.visitVarInsn(ASTORE, p_Result);
        }
        // } else {
        mv.visitJumpInsn(GOTO, l1);
        mv.visitLabel(l0);
        // result = null;
        generateDefaultValue(p_MethodVisitor, p_ReturnType, p_Result);
        // }
        mv.visitLabel(l1);
    } else {
        generateConvertToLdapBean(p_MethodVisitor, p_ClassName, p_LdapAttribute, null, p_Object, p_Result);
    }
}

---

From source file:ldapbeans.bean.LdapBeanClassManager.java

License:LGPL

/**
 * Generate code to convert ldapAttribute witch is on the top of the stack
 * to LdapBean/*from w w  w  .j a va 2 s.c  o  m*/
 * 
 * @param p_MethodVisitor
 *            The {@link MethodVisitor} of the generated method
 * @param p_ClassName
 *            Name of the generated class
 * @param p_LdapAttribute
 *            The LdapAttribute that will be used for generating the method
 * @param p_ReturnType
 *            The type of the result
 * @param p_Object
 *            Index of the object to convert on the stack
 * @param p_Result
 *            Index of the converted object on the stack
 */
private void generateConvertToLdapBean(MethodVisitor p_MethodVisitor, String p_ClassName,
        LdapAttribute p_LdapAttribute, Class<?> p_ReturnType, int p_Object, int p_Result) {
    MethodVisitor mv = p_MethodVisitor;
    Label l1 = new Label();
    Label l0 = new Label();
    // if(object == null) {
    mv.visitVarInsn(ALOAD, p_Object);
    mv.visitJumpInsn(IFNULL, l0);
    // result = m_LdapBeanManager.searchFirst(p_ReturnType,
    // "search_filter");
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, INTERNAL_PACKAGE_NAME + '/' + p_ClassName, "m_LdapBeanManager",
            "Lldapbeans/bean/LdapBeanManager;");
    if (p_ReturnType != null) {
        mv.visitLdcInsn(Type.getType(p_ReturnType));
    } else {
        mv.visitInsn(ACONST_NULL);
    }
    if (p_LdapAttribute.search().length() == 0) {
        mv.visitVarInsn(ALOAD, p_Object);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
        mv.visitMethodInsn(INVOKEVIRTUAL, "ldapbeans/bean/LdapBeanManager", "findByDn",
                "(Ljava/lang/Class;Ljava/lang/String;)" + "Lldapbeans/bean/LdapBean;");
    } else {
        mv.visitLdcInsn(p_LdapAttribute.search());
        if (p_LdapAttribute.pattern().length() != 0) {
            // regExpGroup = StringUtil.getRegexpGroup(object.toString(),
            // pattern)
            mv.visitVarInsn(ALOAD, p_Object);
            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
            mv.visitLdcInsn(p_LdapAttribute.pattern());
            mv.visitMethodInsn(INVOKESTATIC, "ldapbeans/util/StringUtil", "getRegexpGroup",
                    "(Ljava/lang/String;Ljava/lang/String;)" + "[Ljava/lang/String;");
        } else {
            // regExpGroup = new Object[] { object }
            mv.visitInsn(ICONST_1);
            mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
            mv.visitInsn(DUP);
            mv.visitInsn(ICONST_0);
            mv.visitVarInsn(ALOAD, p_Object);
            mv.visitInsn(AASTORE);
        }
        // searchFilter = StringUtil.format("search_filter", regExpGroup);
        mv.visitMethodInsn(INVOKESTATIC, "ldapbeans/util/StringUtil", "format",
                "(Ljava/lang/String;[Ljava/lang/Object;)" + "Ljava/lang/String;");
        // result = m_LdapBeanManager.searchFirst(foo.class, searchFilter);
        mv.visitMethodInsn(INVOKEVIRTUAL, "ldapbeans/bean/LdapBeanManager", "searchFirst",
                "(Ljava/lang/Class;Ljava/lang/String;)" + "Lldapbeans/bean/LdapBean;");
    }
    mv.visitVarInsn(ASTORE, p_Result);
    // } else {
    mv.visitJumpInsn(GOTO, l1);
    mv.visitLabel(l0);
    // result = null;
    mv.visitInsn(ACONST_NULL);
    mv.visitVarInsn(ASTORE, p_Result);
    // }
    mv.visitLabel(l1);
}

---

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