plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/ClassVisitor.java - tapestry-5 - Git at Google

 // ASM: a very small and fast Java bytecode manipulation framework
 // Copyright (c) 2000-2011 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.apache.tapestry5.internal.plastic.asm;

 /**
  * A visitor to visit a Java class. The methods of this class must be called in the following order:
  * {@code visit} [ {@code visitSource} ] [ {@code visitModule} ][ {@code visitNestHost} ][ {@code
  * visitPermittedSubtype} ][ {@code visitOuterClass} ] ( {@code visitAnnotation} | {@code
  * visitTypeAnnotation} | {@code visitAttribute} )* ( {@code visitNestMember} | {@code
  * visitInnerClass} | {@code visitField} | {@code visitMethod} )* {@code visitEnd}.
  *
  * @author Eric Bruneton
  */
 public abstract class ClassVisitor {

   /**
    * The ASM API version implemented by this visitor. The value of this field must be one of {@link
    * Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
    */
   protected final int api;

   /** The class visitor to which this visitor must delegate method calls. May be {@literal null}. */
   protected ClassVisitor cv;

   /**
    * Constructs a new {@link ClassVisitor}.
    *
    * @param api the ASM API version implemented by this visitor. Must be one of {@link
    *     Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
    */
   public ClassVisitor(final int api) {
     this(api, null);
   }

   /**
    * Constructs a new {@link ClassVisitor}.
    *
    * @param api the ASM API version implemented by this visitor. Must be one of {@link
    *     Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6}, {@link Opcodes#ASM7} or {@link
    *     Opcodes#ASM8}.
    * @param classVisitor the class visitor to which this visitor must delegate method calls. May be
    *     null.
    */
   public ClassVisitor(final int api, final ClassVisitor classVisitor) {
     if (api != Opcodes.ASM8
         && api != Opcodes.ASM7
         && api != Opcodes.ASM6
         && api != Opcodes.ASM5
         && api != Opcodes.ASM4
         && api != Opcodes.ASM9_EXPERIMENTAL) {
       throw new IllegalArgumentException("Unsupported api " + api);
     }
     if (api == Opcodes.ASM9_EXPERIMENTAL) {
       Constants.checkAsmExperimental(this);
     }
     this.api = api;
     this.cv = classVisitor;
   }

   /**
    * Visits the header of the class.
    *
    * @param version the class version. The minor version is stored in the 16 most significant bits,
    *     and the major version in the 16 least significant bits.
    * @param access the class's access flags (see {@link Opcodes}). This parameter also indicates if
    *     the class is deprecated {@link Opcodes#ACC_DEPRECATED} or a record {@link
    *     Opcodes#ACC_RECORD}.
    * @param name the internal name of the class (see {@link Type#getInternalName()}).
    * @param signature the signature of this class. May be {@literal null} 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()}).
    *     For interfaces, the super class is {@link Object}. May be {@literal null}, but only for the
    *     {@link Object} class.
    * @param interfaces the internal names of the class's interfaces (see {@link
    *     Type#getInternalName()}). May be {@literal null}.
    */
   public void visit(
       final int version,
       final int access,
       final String name,
       final String signature,
       final String superName,
       final String[] interfaces) {
     if (api < Opcodes.ASM8 && (access & Opcodes.ACC_RECORD) != 0) {
       throw new UnsupportedOperationException("Records requires ASM8");
     }
     if (cv != null) {
       cv.visit(version, access, name, signature, superName, interfaces);
     }
   }

   /**
    * Visits the source of the class.
    *
    * @param source the name of the source file from which the class was compiled. May be {@literal
    *     null}.
    * @param debug additional debug information to compute the correspondence between source and
    *     compiled elements of the class. May be {@literal null}.
    */
   public void visitSource(final String source, final String debug) {
     if (cv != null) {
       cv.visitSource(source, debug);
     }
   }

   /**
    * Visit the module corresponding to the class.
    *
    * @param name the fully qualified name (using dots) of the module.
    * @param access the module access flags, among {@code ACC_OPEN}, {@code ACC_SYNTHETIC} and {@code
    *     ACC_MANDATED}.
    * @param version the module version, or {@literal null}.
    * @return a visitor to visit the module values, or {@literal null} if this visitor is not
    *     interested in visiting this module.
    */
   public ModuleVisitor visitModule(final String name, final int access, final String version) {
     if (api < Opcodes.ASM6) {
       throw new UnsupportedOperationException("This feature requires ASM6");
     }
     if (cv != null) {
       return cv.visitModule(name, access, version);
     }
     return null;
   }

   /**
    * Visits the nest host class of the class. A nest is a set of classes of the same package that
    * share access to their private members. One of these classes, called the host, lists the other
    * members of the nest, which in turn should link to the host of their nest. This method must be
    * called only once and only if the visited class is a non-host member of a nest. A class is
    * implicitly its own nest, so it's invalid to call this method with the visited class name as
    * argument.
    *
    * @param nestHost the internal name of the host class of the nest.
    */
   public void visitNestHost(final String nestHost) {
     if (api < Opcodes.ASM7) {
       throw new UnsupportedOperationException("This feature requires ASM7");
     }
     if (cv != null) {
       cv.visitNestHost(nestHost);
     }
   }

   /**
    * 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 {@literal null} if the class is
    *     not enclosed in a method of its enclosing class.
    * @param descriptor the descriptor of the method that contains the class, or {@literal null} if
    *     the class is not enclosed in a method of its enclosing class.
    */
   public void visitOuterClass(final String owner, final String name, final String descriptor) {
     if (cv != null) {
       cv.visitOuterClass(owner, name, descriptor);
     }
   }

   /**
    * Visits an annotation of the class.
    *
    * @param descriptor the class descriptor of the annotation class.
    * @param visible {@literal true} if the annotation is visible at runtime.
    * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
    *     interested in visiting this annotation.
    */
   public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
     if (cv != null) {
       return cv.visitAnnotation(descriptor, visible);
     }
     return null;
   }

   /**
    * Visits an annotation on a type in the class signature.
    *
    * @param typeRef a reference to the annotated type. The sort of this type reference must be
    *     {@link TypeReference#CLASS_TYPE_PARAMETER}, {@link
    *     TypeReference#CLASS_TYPE_PARAMETER_BOUND} or {@link TypeReference#CLASS_EXTENDS}. See
    *     {@link TypeReference}.
    * @param typePath the path to the annotated type argument, wildcard bound, array element type, or
    *     static inner type within 'typeRef'. May be {@literal null} if the annotation targets
    *     'typeRef' as a whole.
    * @param descriptor the class descriptor of the annotation class.
    * @param visible {@literal true} if the annotation is visible at runtime.
    * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
    *     interested in visiting this annotation.
    */
   public AnnotationVisitor visitTypeAnnotation(
       final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
     if (api < Opcodes.ASM5) {
       throw new UnsupportedOperationException("This feature requires ASM5");
     }
     if (cv != null) {
       return cv.visitTypeAnnotation(typeRef, typePath, descriptor, visible);
     }
     return null;
   }

   /**
    * Visits a non standard attribute of the class.
    *
    * @param attribute an attribute.
    */
   public void visitAttribute(final Attribute attribute) {
     if (cv != null) {
       cv.visitAttribute(attribute);
     }
   }

   /**
    * Visits a member of the nest. A nest is a set of classes of the same package that share access
    * to their private members. One of these classes, called the host, lists the other members of the
    * nest, which in turn should link to the host of their nest. This method must be called only if
    * the visited class is the host of a nest. A nest host is implicitly a member of its own nest, so
    * it's invalid to call this method with the visited class name as argument.
    *
    * @param nestMember the internal name of a nest member.
    */
   public void visitNestMember(final String nestMember) {
     if (api < Opcodes.ASM7) {
       throw new UnsupportedOperationException("This feature requires ASM7");
     }
     if (cv != null) {
       cv.visitNestMember(nestMember);
     }
   }

   /**
    * <b>Experimental, use at your own risk. This method will be renamed when it becomes stable, this
    * will break existing code using it</b>. Visits a permitted subtypes. A permitted subtypes is one
    * of the allowed subtypes of the current class.
    *
    * @param permittedSubtype the internal name of a permitted subtype.
    * @deprecated this API is experimental.
    */
   @Deprecated
   public void visitPermittedSubtypeExperimental(final String permittedSubtype) {
     if (api != Opcodes.ASM9_EXPERIMENTAL) {
       throw new UnsupportedOperationException("This feature requires ASM9_EXPERIMENTAL");
     }
     if (cv != null) {
       cv.visitPermittedSubtypeExperimental(permittedSubtype);
     }
   }

   /**
    * 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()}).
    * @param outerName the internal name of the class to which the inner class belongs (see {@link
    *     Type#getInternalName()}). May be {@literal null} for not member classes.
    * @param innerName the (simple) name of the inner class inside its enclosing class. May be
    *     {@literal null} for anonymous inner classes.
    * @param access the access flags of the inner class as originally declared in the enclosing
    *     class.
    */
   public void visitInnerClass(
       final String name, final String outerName, final String innerName, final int access) {
     if (cv != null) {
       cv.visitInnerClass(name, outerName, innerName, access);
     }
   }

   /**
    * Visits a record component of the class.
    *
    * @param name the record component name.
    * @param descriptor the record component descriptor (see {@link Type}).
    * @param signature the record component signature. May be {@literal null} if the record component
    *     type does not use generic types.
    * @return a visitor to visit this record component annotations and attributes, or {@literal null}
    *     if this class visitor is not interested in visiting these annotations and attributes.
    */
   public RecordComponentVisitor visitRecordComponent(
       final String name, final String descriptor, final String signature) {
     if (api < Opcodes.ASM8) {
       throw new UnsupportedOperationException("This feature requires ASM8");
     }
     if (cv != null) {
       return cv.visitRecordComponent(name, descriptor, signature);
     }
     return null;
   }

   /**
    * 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 descriptor the field's descriptor (see {@link Type}).
    * @param signature the field's signature. May be {@literal null} if the field's type does not use
    *     generic types.
    * @param value the field's initial value. This parameter, which may be {@literal null} 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 {@code int}, {@code float}, {@code long}
    *     or {@code String} 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 {@literal null} if this class
    *     visitor is not interested in visiting these annotations and attributes.
    */
   public FieldVisitor visitField(
       final int access,
       final String name,
       final String descriptor,
       final String signature,
       final Object value) {
     if (cv != null) {
       return cv.visitField(access, name, descriptor, signature, value);
     }
     return null;
   }

   /**
    * Visits a method of the class. This method <i>must</i> return a new {@link MethodVisitor}
    * instance (or {@literal null}) 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 descriptor the method's descriptor (see {@link Type}).
    * @param signature the method's signature. May be {@literal null} 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()}). May be {@literal null}.
    * @return an object to visit the byte code of the method, or {@literal null} if this class
    *     visitor is not interested in visiting the code of this method.
    */
   public MethodVisitor visitMethod(
       final int access,
       final String name,
       final String descriptor,
       final String signature,
       final String[] exceptions) {
     if (cv != null) {
       return cv.visitMethod(access, name, descriptor, signature, exceptions);
     }
     return null;
   }

   /**
    * 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.
    */
   public void visitEnd() {
     if (cv != null) {
       cv.visitEnd();
     }
   }
 }
	// ASM: a very small and fast Java bytecode manipulation framework
	// Copyright (c) 2000-2011 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.apache.tapestry5.internal.plastic.asm;

	/**
	* A visitor to visit a Java class. The methods of this class must be called in the following order:
	* {@code visit} [ {@code visitSource} ] [ {@code visitModule} ][ {@code visitNestHost} ][ {@code
	* visitPermittedSubtype} ][ {@code visitOuterClass} ] ( {@code visitAnnotation} \| {@code
	* visitTypeAnnotation} \| {@code visitAttribute} )* ( {@code visitNestMember} \| {@code
	* visitInnerClass} \| {@code visitField} \| {@code visitMethod} )* {@code visitEnd}.
	*
	* @author Eric Bruneton
	*/
	public abstract class ClassVisitor {

	/**
	* The ASM API version implemented by this visitor. The value of this field must be one of {@link
	* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
	*/
	protected final int api;

	/** The class visitor to which this visitor must delegate method calls. May be {@literal null}. */
	protected ClassVisitor cv;

	/**
	* Constructs a new {@link ClassVisitor}.
	*
	* @param api the ASM API version implemented by this visitor. Must be one of {@link
	* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
	*/
	public ClassVisitor(final int api) {
	this(api, null);
	}

	/**
	* Constructs a new {@link ClassVisitor}.
	*
	* @param api the ASM API version implemented by this visitor. Must be one of {@link
	* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6}, {@link Opcodes#ASM7} or {@link
	* Opcodes#ASM8}.
	* @param classVisitor the class visitor to which this visitor must delegate method calls. May be
	* null.
	*/
	public ClassVisitor(final int api, final ClassVisitor classVisitor) {
	if (api != Opcodes.ASM8
	&& api != Opcodes.ASM7
	&& api != Opcodes.ASM6
	&& api != Opcodes.ASM5
	&& api != Opcodes.ASM4
	&& api != Opcodes.ASM9_EXPERIMENTAL) {
	throw new IllegalArgumentException("Unsupported api " + api);
	}
	if (api == Opcodes.ASM9_EXPERIMENTAL) {
	Constants.checkAsmExperimental(this);
	}
	this.api = api;
	this.cv = classVisitor;
	}

	/**
	* Visits the header of the class.
	*
	* @param version the class version. The minor version is stored in the 16 most significant bits,
	* and the major version in the 16 least significant bits.
	* @param access the class's access flags (see {@link Opcodes}). This parameter also indicates if
	* the class is deprecated {@link Opcodes#ACC_DEPRECATED} or a record {@link
	* Opcodes#ACC_RECORD}.
	* @param name the internal name of the class (see {@link Type#getInternalName()}).
	* @param signature the signature of this class. May be {@literal null} 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()}).
	* For interfaces, the super class is {@link Object}. May be {@literal null}, but only for the
	* {@link Object} class.
	* @param interfaces the internal names of the class's interfaces (see {@link
	* Type#getInternalName()}). May be {@literal null}.
	*/
	public void visit(
	final int version,
	final int access,
	final String name,
	final String signature,
	final String superName,
	final String[] interfaces) {
	if (api < Opcodes.ASM8 && (access & Opcodes.ACC_RECORD) != 0) {
	throw new UnsupportedOperationException("Records requires ASM8");
	}
	if (cv != null) {
	cv.visit(version, access, name, signature, superName, interfaces);
	}
	}

	/**
	* Visits the source of the class.
	*
	* @param source the name of the source file from which the class was compiled. May be {@literal
	* null}.
	* @param debug additional debug information to compute the correspondence between source and
	* compiled elements of the class. May be {@literal null}.
	*/
	public void visitSource(final String source, final String debug) {
	if (cv != null) {
	cv.visitSource(source, debug);
	}
	}

	/**
	* Visit the module corresponding to the class.
	*
	* @param name the fully qualified name (using dots) of the module.
	* @param access the module access flags, among {@code ACC_OPEN}, {@code ACC_SYNTHETIC} and {@code
	* ACC_MANDATED}.
	* @param version the module version, or {@literal null}.
	* @return a visitor to visit the module values, or {@literal null} if this visitor is not
	* interested in visiting this module.
	*/
	public ModuleVisitor visitModule(final String name, final int access, final String version) {
	if (api < Opcodes.ASM6) {
	throw new UnsupportedOperationException("This feature requires ASM6");
	}
	if (cv != null) {
	return cv.visitModule(name, access, version);
	}
	return null;
	}

	/**
	* Visits the nest host class of the class. A nest is a set of classes of the same package that
	* share access to their private members. One of these classes, called the host, lists the other
	* members of the nest, which in turn should link to the host of their nest. This method must be
	* called only once and only if the visited class is a non-host member of a nest. A class is
	* implicitly its own nest, so it's invalid to call this method with the visited class name as
	* argument.
	*
	* @param nestHost the internal name of the host class of the nest.
	*/
	public void visitNestHost(final String nestHost) {
	if (api < Opcodes.ASM7) {
	throw new UnsupportedOperationException("This feature requires ASM7");
	}
	if (cv != null) {
	cv.visitNestHost(nestHost);
	}
	}

	/**
	* 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 {@literal null} if the class is
	* not enclosed in a method of its enclosing class.
	* @param descriptor the descriptor of the method that contains the class, or {@literal null} if
	* the class is not enclosed in a method of its enclosing class.
	*/
	public void visitOuterClass(final String owner, final String name, final String descriptor) {
	if (cv != null) {
	cv.visitOuterClass(owner, name, descriptor);
	}
	}

	/**
	* Visits an annotation of the class.
	*
	* @param descriptor the class descriptor of the annotation class.
	* @param visible {@literal true} if the annotation is visible at runtime.
	* @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
	* interested in visiting this annotation.
	*/
	public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
	if (cv != null) {
	return cv.visitAnnotation(descriptor, visible);
	}
	return null;
	}

	/**
	* Visits an annotation on a type in the class signature.
	*
	* @param typeRef a reference to the annotated type. The sort of this type reference must be
	* {@link TypeReference#CLASS_TYPE_PARAMETER}, {@link
	* TypeReference#CLASS_TYPE_PARAMETER_BOUND} or {@link TypeReference#CLASS_EXTENDS}. See
	* {@link TypeReference}.
	* @param typePath the path to the annotated type argument, wildcard bound, array element type, or
	* static inner type within 'typeRef'. May be {@literal null} if the annotation targets
	* 'typeRef' as a whole.
	* @param descriptor the class descriptor of the annotation class.
	* @param visible {@literal true} if the annotation is visible at runtime.
	* @return a visitor to visit the annotation values, or {@literal null} if this visitor is not
	* interested in visiting this annotation.
	*/
	public AnnotationVisitor visitTypeAnnotation(
	final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
	if (api < Opcodes.ASM5) {
	throw new UnsupportedOperationException("This feature requires ASM5");
	}
	if (cv != null) {
	return cv.visitTypeAnnotation(typeRef, typePath, descriptor, visible);
	}
	return null;
	}

	/**
	* Visits a non standard attribute of the class.
	*
	* @param attribute an attribute.
	*/
	public void visitAttribute(final Attribute attribute) {
	if (cv != null) {
	cv.visitAttribute(attribute);
	}
	}

	/**
	* Visits a member of the nest. A nest is a set of classes of the same package that share access
	* to their private members. One of these classes, called the host, lists the other members of the
	* nest, which in turn should link to the host of their nest. This method must be called only if
	* the visited class is the host of a nest. A nest host is implicitly a member of its own nest, so
	* it's invalid to call this method with the visited class name as argument.
	*
	* @param nestMember the internal name of a nest member.
	*/
	public void visitNestMember(final String nestMember) {
	if (api < Opcodes.ASM7) {
	throw new UnsupportedOperationException("This feature requires ASM7");
	}
	if (cv != null) {
	cv.visitNestMember(nestMember);
	}
	}

	/**
	* <b>Experimental, use at your own risk. This method will be renamed when it becomes stable, this
	* will break existing code using it</b>. Visits a permitted subtypes. A permitted subtypes is one
	* of the allowed subtypes of the current class.
	*
	* @param permittedSubtype the internal name of a permitted subtype.
	* @deprecated this API is experimental.
	*/
	@Deprecated
	public void visitPermittedSubtypeExperimental(final String permittedSubtype) {
	if (api != Opcodes.ASM9_EXPERIMENTAL) {
	throw new UnsupportedOperationException("This feature requires ASM9_EXPERIMENTAL");
	}
	if (cv != null) {
	cv.visitPermittedSubtypeExperimental(permittedSubtype);
	}
	}

	/**
	* 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()}).
	* @param outerName the internal name of the class to which the inner class belongs (see {@link
	* Type#getInternalName()}). May be {@literal null} for not member classes.
	* @param innerName the (simple) name of the inner class inside its enclosing class. May be
	* {@literal null} for anonymous inner classes.
	* @param access the access flags of the inner class as originally declared in the enclosing
	* class.
	*/
	public void visitInnerClass(
	final String name, final String outerName, final String innerName, final int access) {
	if (cv != null) {
	cv.visitInnerClass(name, outerName, innerName, access);
	}
	}

	/**
	* Visits a record component of the class.
	*
	* @param name the record component name.
	* @param descriptor the record component descriptor (see {@link Type}).
	* @param signature the record component signature. May be {@literal null} if the record component
	* type does not use generic types.
	* @return a visitor to visit this record component annotations and attributes, or {@literal null}
	* if this class visitor is not interested in visiting these annotations and attributes.
	*/
	public RecordComponentVisitor visitRecordComponent(
	final String name, final String descriptor, final String signature) {
	if (api < Opcodes.ASM8) {
	throw new UnsupportedOperationException("This feature requires ASM8");
	}
	if (cv != null) {
	return cv.visitRecordComponent(name, descriptor, signature);
	}
	return null;
	}

	/**
	* 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 descriptor the field's descriptor (see {@link Type}).
	* @param signature the field's signature. May be {@literal null} if the field's type does not use
	* generic types.
	* @param value the field's initial value. This parameter, which may be {@literal null} 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 {@code int}, {@code float}, {@code long}
	* or {@code String} 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 {@literal null} if this class
	* visitor is not interested in visiting these annotations and attributes.
	*/
	public FieldVisitor visitField(
	final int access,
	final String name,
	final String descriptor,
	final String signature,
	final Object value) {
	if (cv != null) {
	return cv.visitField(access, name, descriptor, signature, value);
	}
	return null;
	}

	/**
	* Visits a method of the class. This method <i>must</i> return a new {@link MethodVisitor}
	* instance (or {@literal null}) 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 descriptor the method's descriptor (see {@link Type}).
	* @param signature the method's signature. May be {@literal null} 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()}). May be {@literal null}.
	* @return an object to visit the byte code of the method, or {@literal null} if this class
	* visitor is not interested in visiting the code of this method.
	*/
	public MethodVisitor visitMethod(
	final int access,
	final String name,
	final String descriptor,
	final String signature,
	final String[] exceptions) {
	if (cv != null) {
	return cv.visitMethod(access, name, descriptor, signature, exceptions);
	}
	return null;
	}

	/**
	* 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.
	*/
	public void visitEnd() {
	if (cv != null) {
	cv.visitEnd();
	}
	}
	}