/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
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 * by Oracle in the LICENSE file that accompanied this code.
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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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
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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 * 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.commons;

import jdk.internal.org.objectweb.asm.ClassVisitor;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;

A ClassVisitor that merges clinit methods into a single one.
Author:Eric Bruneton
/** * A {@link ClassVisitor} that merges clinit methods into a single one. * * @author Eric Bruneton */
public class StaticInitMerger extends ClassVisitor { private String name; private MethodVisitor clinit; private final String prefix; private int counter; public StaticInitMerger(final String prefix, final ClassVisitor cv) { this(Opcodes.ASM6, prefix, cv); } protected StaticInitMerger(final int api, final String prefix, final ClassVisitor cv) { super(api, cv); this.prefix = prefix; } @Override public void visit(final int version, final int access, final String name, final String signature, final String superName, final String[] interfaces) { cv.visit(version, access, name, signature, superName, interfaces); this.name = name; } @Override public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) { MethodVisitor mv; if ("<clinit>".equals(name)) { int a = Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC; String n = prefix + counter++; mv = cv.visitMethod(a, n, desc, signature, exceptions); if (clinit == null) { clinit = cv.visitMethod(a, name, desc, null, null); } clinit.visitMethodInsn(Opcodes.INVOKESTATIC, this.name, n, desc, false); } else { mv = cv.visitMethod(access, name, desc, signature, exceptions); } return mv; } @Override public void visitEnd() { if (clinit != null) { clinit.visitInsn(Opcodes.RETURN); clinit.visitMaxs(0, 0); } cv.visitEnd(); } }