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// 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.mvel2.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 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.
*/
public ModuleVisitor(final int api, final ModuleVisitor moduleVisitor) {
if (api != Opcodes.ASM6 && api != Opcodes.ASM7) {
throw new IllegalArgumentException();
}
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();
}
}
}
