/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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/*
 * 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
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 */
package jdk.internal.org.objectweb.asm.util;

import java.util.HashSet;

import jdk.internal.org.objectweb.asm.ModuleVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;

Author:Remi Forax
/** * @author Remi Forax */
public final class CheckModuleAdapter extends ModuleVisitor { private boolean end; private final boolean isOpen; private final HashSet<String> requireNames = new HashSet<String>(); private final HashSet<String> exportNames = new HashSet<String>(); private final HashSet<String> openNames = new HashSet<String>(); private final HashSet<String> useNames = new HashSet<String>(); private final HashSet<String> provideNames = new HashSet<String>(); public CheckModuleAdapter(final ModuleVisitor mv, final boolean isOpen) { super(Opcodes.ASM6, mv); this.isOpen = isOpen; } @Override public void visitRequire(String module, int access, String version) { checkEnd(); if (module == null) { throw new IllegalArgumentException("require cannot be null"); } checkDeclared("requires", requireNames, module); CheckClassAdapter.checkAccess(access, Opcodes.ACC_STATIC_PHASE + Opcodes.ACC_TRANSITIVE + Opcodes.ACC_SYNTHETIC + Opcodes.ACC_MANDATED); super.visitRequire(module, access, version); } @Override public void visitExport(String packaze, int access, String... modules) { checkEnd(); if (packaze == null) { throw new IllegalArgumentException("packaze cannot be null"); } CheckMethodAdapter.checkInternalName(packaze, "package name"); checkDeclared("exports", exportNames, packaze); CheckClassAdapter.checkAccess(access, Opcodes.ACC_SYNTHETIC + Opcodes.ACC_MANDATED); if (modules != null) { for (int i = 0; i < modules.length; i++) { if (modules[i] == null) { throw new IllegalArgumentException("module at index " + i + " cannot be null"); } } } super.visitExport(packaze, access, modules); } @Override public void visitOpen(String packaze, int access, String... modules) { checkEnd(); if (isOpen) { throw new IllegalArgumentException("an open module can not use open directive"); } if (packaze == null) { throw new IllegalArgumentException("packaze cannot be null"); } CheckMethodAdapter.checkInternalName(packaze, "package name"); checkDeclared("opens", openNames, packaze); CheckClassAdapter.checkAccess(access, Opcodes.ACC_SYNTHETIC + Opcodes.ACC_MANDATED); if (modules != null) { for (int i = 0; i < modules.length; i++) { if (modules[i] == null) { throw new IllegalArgumentException("module at index " + i + " cannot be null"); } } } super.visitOpen(packaze, access, modules); } @Override public void visitUse(String service) { checkEnd(); CheckMethodAdapter.checkInternalName(service, "service"); checkDeclared("uses", useNames, service); super.visitUse(service); } @Override public void visitProvide(String service, String... providers) { checkEnd(); CheckMethodAdapter.checkInternalName(service, "service"); checkDeclared("provides", provideNames, service); if (providers == null || providers.length == 0) { throw new IllegalArgumentException("providers cannot be null or empty"); } for (int i = 0; i < providers.length; i++) { CheckMethodAdapter.checkInternalName(providers[i], "provider"); } super.visitProvide(service, providers); } @Override public void visitEnd() { checkEnd(); end = true; super.visitEnd(); } private void checkEnd() { if (end) { throw new IllegalStateException( "Cannot call a visit method after visitEnd has been called"); } } private static void checkDeclared(String directive, HashSet<String> names, String name) { if (!names.add(name)) { throw new IllegalArgumentException(directive + " " + name + " already declared"); } } }