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/***

 * ASM: a very small and fast Java bytecode manipulation framework

 * Copyright (c) 2000-2005 INRIA, France Telecom

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the copyright holders nor the names of its

 *    contributors may be used to endorse or promote products derived from

 *    this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

package org.objectweb.asm;

/**

 * A visitor to visit a Java class. The methods of this interface must be called

 * in the following order: <tt>visit</tt> [ <tt>visitSource</tt> ] [

 * <tt>visitOuterClass</tt> ] ( <tt>visitAnnotation</tt> |

 * <tt>visitAttribute</tt> )* (<tt>visitInnerClass</tt> |

 * <tt>visitField</tt> | <tt>visitMethod</tt> )* <tt>visitEnd</tt>.

 *

 * @author Eric Bruneton

 */

public interface ClassVisitor {

    /**

     * Visits the header of the class.

     *

     * @param version the class version.

     * @param access the class's access flags (see {@link Opcodes}). This

     *        parameter also indicates if the class is deprecated.

     * @param name the internal name of the class (see

     *        {@link Type#getInternalName() getInternalName}).

     * @param signature the signature of this class. May be <tt>null</tt> if

     *        the class is not a generic one, and does not extend or implement

     *        generic classes or interfaces.

     * @param superName the internal of name of the super class (see

     *        {@link Type#getInternalName() getInternalName}). For interfaces,

     *        the super class is {@link Object}. May be <tt>null</tt>, but

     *        only for the {@link Object} class.

     * @param interfaces the internal names of the class's interfaces (see

     *        {@link Type#getInternalName() getInternalName}). May be

     *        <tt>null</tt>.

     */

    void visit(

        int version,

        int access,

        String name,

        String signature,

        String superName,

        String[] interfaces);

    /**

     * Visits the source of the class.

     *

     * @param source the name of the source file from which the class was

     *        compiled. May be <tt>null</tt>.

     * @param debug additional debug information to compute the correspondance

     *        between source and compiled elements of the class. May be

     *        <tt>null</tt>.

     */

    void visitSource(String source, String debug);

    /**

     * Visits the enclosing class of the class. This method must be called only

     * if the class has an enclosing class.

     *

     * @param owner internal name of the enclosing class of the class.

     * @param name the name of the method that contains the class, or

     *        <tt>null</tt> if the class is not enclosed in a method of its

     *        enclosing class.

     * @param desc the descriptor of the method that contains the class, or

     *        <tt>null</tt> if the class is not enclosed in a method of its

     *        enclosing class.

     */

    void visitOuterClass(String owner, String name, String desc);

    /**

     * Visits an annotation of the class.

     *

     * @param desc the class descriptor of the annotation class.

     * @param visible <tt>true</tt> if the annotation is visible at runtime.

     * @return a non null visitor to visit the annotation values.

     */

    AnnotationVisitor visitAnnotation(String desc, boolean visible);

    /**

     * Visits a non standard attribute of the class.

     *

     * @param attr an attribute.

     */

    void visitAttribute(Attribute attr);

    /**

     * Visits information about an inner class. This inner class is not

     * necessarily a member of the class being visited.

     *

     * @param name the internal name of an inner class (see

     *        {@link Type#getInternalName() getInternalName}).

     * @param outerName the internal name of the class to which the inner class

     *        belongs (see {@link Type#getInternalName() getInternalName}). May

     *        be <tt>null</tt>.

     * @param innerName the (simple) name of the inner class inside its

     *        enclosing class. May be <tt>null</tt> for anonymous inner

     *        classes.

     * @param access the access flags of the inner class as originally declared

     *        in the enclosing class.

     */

    void visitInnerClass(

        String name,

        String outerName,

        String innerName,

        int access);

    /**

     * Visits a field of the class.

     *

     * @param access the field's access flags (see {@link Opcodes}). This

     *        parameter also indicates if the field is synthetic and/or

     *        deprecated.

     * @param name the field's name.

     * @param desc the field's descriptor (see {@link Type Type}).

     * @param signature the field's signature. May be <tt>null</tt> if the

     *        field's type does not use generic types.

     * @param value the field's initial value. This parameter, which may be

     *        <tt>null</tt> if the field does not have an initial value, must

     *        be an {@link Integer}, a {@link Float}, a {@link Long}, a

     *        {@link Double} or a {@link String} (for <tt>int</tt>,

     *        <tt>float</tt>, <tt>long</tt> or <tt>String</tt> fields

     *        respectively). <i>This parameter is only used for static fields</i>.

     *        Its value is ignored for non static fields, which must be

     *        initialized through bytecode instructions in constructors or

     *        methods.

     * @return a visitor to visit field annotations and attributes, or

     *         <tt>null</tt> if this class visitor is not interested in

     *         visiting these annotations and attributes.

     */

    FieldVisitor visitField(

        int access,

        String name,

        String desc,

        String signature,

        Object value);

    /**

     * Visits a method of the class. This method <i>must</i> return a new

     * {@link MethodVisitor} instance (or <tt>null</tt>) each time it is

     * called, i.e., it should not return a previously returned visitor.

     *

     * @param access the method's access flags (see {@link Opcodes}). This

     *        parameter also indicates if the method is synthetic and/or

     *        deprecated.

     * @param name the method's name.

     * @param desc the method's descriptor (see {@link Type Type}).

     * @param signature the method's signature. May be <tt>null</tt> if the

     *        method parameters, return type and exceptions do not use generic

     *        types.

     * @param exceptions the internal names of the method's exception classes

     *        (see {@link Type#getInternalName() getInternalName}). May be

     *        <tt>null</tt>.

     * @return an object to visit the byte code of the method, or <tt>null</tt>

     *         if this class visitor is not interested in visiting the code of

     *         this method.

     */

    MethodVisitor visitMethod(

        int access,

        String name,

        String desc,

        String signature,

        String[] exceptions);

    /**

     * Visits the end of the class. This method, which is the last one to be

     * called, is used to inform the visitor that all the fields and methods of

     * the class have been visited.

     */

    void visitEnd();

}