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	/*
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/*
	* This file is available under and governed by the GNU General Public
	* License version 2 only, as published by the Free Software Foundation.
	* However, the following notice accompanied the original version of this
	* file:
	*
	* 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 jdk.internal.org.objectweb.asm;

	/**
	* A visitor to visit a Java module. The methods of this class must be called in the following
	* order: ( {@code visitMainClass} \| ( {@code visitPackage} \| {@code visitRequire} \| {@code
	* visitExport} \| {@code visitOpen} \| {@code visitUse} \| {@code visitProvide} )* ) {@code visitEnd}.
	*
	* @author Remi Forax
	* @author Eric Bruneton
	*/
	public abstract class ModuleVisitor {
	/**
	* The ASM API version implemented by this visitor. The value of this field must be one of {@link
	* Opcodes#ASM6} or {@link Opcodes#ASM7}.
	*/
	protected final int api;

	/**
	* The module visitor to which this visitor must delegate method calls. May be {@literal null}.
	*/
	protected ModuleVisitor mv;

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

	/**
	* Constructs a new {@link ModuleVisitor}.
	*
	* @param api the ASM API version implemented by this visitor. Must be one of {@link Opcodes#ASM6}
	* or {@link Opcodes#ASM7}.
	* @param moduleVisitor the module visitor to which this visitor must delegate method calls. May
	* be null.
	*/
	@SuppressWarnings("deprecation")
	public ModuleVisitor(final int api, final ModuleVisitor moduleVisitor) {
	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.mv = moduleVisitor;
	}

	/**
	* Visit the main class of the current module.
	*
	* @param mainClass the internal name of the main class of the current module.
	*/
	public void visitMainClass(final String mainClass) {
	if (mv != null) {
	mv.visitMainClass(mainClass);
	}
	}

	/**
	* Visit a package of the current module.
	*
	* @param packaze the internal name of a package.
	*/
	public void visitPackage(final String packaze) {
	if (mv != null) {
	mv.visitPackage(packaze);
	}
	}

	/**
	* Visits a dependence of the current module.
	*
	* @param module the fully qualified name (using dots) of the dependence.
	* @param access the access flag of the dependence among {@code ACC_TRANSITIVE}, {@code
	* ACC_STATIC_PHASE}, {@code ACC_SYNTHETIC} and {@code ACC_MANDATED}.
	* @param version the module version at compile time, or {@literal null}.
	*/
	public void visitRequire(final String module, final int access, final String version) {
	if (mv != null) {
	mv.visitRequire(module, access, version);
	}
	}

	/**
	* Visit an exported package of the current module.
	*
	* @param packaze the internal name of the exported package.
	* @param access the access flag of the exported package, valid values are among {@code
	* ACC_SYNTHETIC} and {@code ACC_MANDATED}.
	* @param modules the fully qualified names (using dots) of the modules that can access the public
	* classes of the exported package, or {@literal null}.
	*/
	public void visitExport(final String packaze, final int access, final String... modules) {
	if (mv != null) {
	mv.visitExport(packaze, access, modules);
	}
	}

	/**
	* Visit an open package of the current module.
	*
	* @param packaze the internal name of the opened package.
	* @param access the access flag of the opened package, valid values are among {@code
	* ACC_SYNTHETIC} and {@code ACC_MANDATED}.
	* @param modules the fully qualified names (using dots) of the modules that can use deep
	* reflection to the classes of the open package, or {@literal null}.
	*/
	public void visitOpen(final String packaze, final int access, final String... modules) {
	if (mv != null) {
	mv.visitOpen(packaze, access, modules);
	}
	}

	/**
	* Visit a service used by the current module. The name must be the internal name of an interface
	* or a class.
	*
	* @param service the internal name of the service.
	*/
	public void visitUse(final String service) {
	if (mv != null) {
	mv.visitUse(service);
	}
	}

	/**
	* Visit an implementation of a service.
	*
	* @param service the internal name of the service.
	* @param providers the internal names of the implementations of the service (there is at least
	* one provider).
	*/
	public void visitProvide(final String service, final String... providers) {
	if (mv != null) {
	mv.visitProvide(service, providers);
	}
	}

	/**
	* Visits the end of the module. This method, which is the last one to be called, is used to
	* inform the visitor that everything have been visited.
	*/
	public void visitEnd() {
	if (mv != null) {
	mv.visitEnd();
	}
	}
	}

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