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With inspiration from other libraries
/***
* 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: visitMainClass | ( visitPackage |
* visitRequire | visitExport | visitOpen |
* visitUse | visitProvide )* visitEnd.
*
* The methods {@link #visitRequire(String, int, String)}, {@link #visitExport(String, int, String...)},
* {@link #visitOpen(String, int, String...)} and {@link #visitPackage(String)}
* take as parameter a package name or a module name. Unlike the other names which are internal names
* (names separated by slash), module and package names are qualified names (names separated by dot).
*
* @author Remi Forax
*/
public abstract class ModuleVisitor {
/**
* The ASM API version implemented by this visitor. The value of this field
* must be {@link Opcodes#ASM6}.
*/
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 {@link Opcodes#ASM6}.
*/
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 {@link Opcodes#ASM6}.
* @param mv
* the module visitor to which this visitor must delegate method
* calls. May be null.
*/
public ModuleVisitor(final int api, final ModuleVisitor mv) {
if (api != Opcodes.ASM6) {
throw new IllegalArgumentException();
}
this.api = api;
this.mv = mv;
}
/**
* Visit the main class of the current module.
*
* @param mainClass the internal name of the main class of the current module.
*/
public void visitMainClass(String mainClass) {
if (mv != null) {
mv.visitMainClass(mainClass);
}
}
/**
* Visit a package of the current module.
*
* @param packaze the qualified name of a package.
*/
public void visitPackage(String packaze) {
if (mv != null) {
mv.visitPackage(packaze);
}
}
/**
* Visits a dependence of the current module.
*
* @param module the qualified name of the dependence.
* @param access the access flag of the dependence among
* ACC_TRANSITIVE, ACC_STATIC_PHASE, ACC_SYNTHETIC
* and ACC_MANDATED.
* @param version the module version at compile time or null.
*/
public void visitRequire(String module, int access, String version) {
if (mv != null) {
mv.visitRequire(module, access, version);
}
}
/**
* Visit an exported package of the current module.
*
* @param packaze the qualified 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 qualified names of the modules that can access to
* the public classes of the exported package or
* null.
*/
public void visitExport(String packaze, int access, String... modules) {
if (mv != null) {
mv.visitExport(packaze, access, modules);
}
}
/**
* Visit an open package of the current module.
*
* @param packaze the qualified 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 qualified names of the modules that can use deep
* reflection to the classes of the open package or
* null.
*/
public void visitOpen(String packaze, int access, 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(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(String service, 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();
}
}
}