98 lines
3.6 KiB
Java
98 lines
3.6 KiB
Java
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/***
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* ASM: a very small and fast Java bytecode manipulation framework
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* Copyright (c) 2000-2011 INRIA, France Telecom
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.objectweb.asm.commons;
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import org.objectweb.asm.ClassVisitor;
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import org.objectweb.asm.MethodVisitor;
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import org.objectweb.asm.Opcodes;
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/**
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* A {@link ClassVisitor} that merges clinit methods into a single one.
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*
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* @author Eric Bruneton
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*/
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public class StaticInitMerger extends ClassVisitor {
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private String name;
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private MethodVisitor clinit;
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private final String prefix;
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private int counter;
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public StaticInitMerger(final String prefix, final ClassVisitor cv) {
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this(Opcodes.ASM5, prefix, cv);
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}
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protected StaticInitMerger(final int api, final String prefix,
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final ClassVisitor cv) {
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super(api, cv);
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this.prefix = prefix;
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}
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@Override
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public void visit(final int version, final int access, final String name,
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final String signature, final String superName,
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final String[] interfaces) {
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cv.visit(version, access, name, signature, superName, interfaces);
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this.name = name;
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}
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@Override
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public MethodVisitor visitMethod(final int access, final String name,
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final String desc, final String signature, final String[] exceptions) {
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MethodVisitor mv;
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if ("<clinit>".equals(name)) {
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int a = Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC;
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String n = prefix + counter++;
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mv = cv.visitMethod(a, n, desc, signature, exceptions);
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if (clinit == null) {
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clinit = cv.visitMethod(a, name, desc, null, null);
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}
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clinit.visitMethodInsn(Opcodes.INVOKESTATIC, this.name, n, desc,
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false);
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} else {
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mv = cv.visitMethod(access, name, desc, signature, exceptions);
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}
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return mv;
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}
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@Override
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public void visitEnd() {
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if (clinit != null) {
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clinit.visitInsn(Opcodes.RETURN);
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clinit.visitMaxs(0, 0);
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}
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cv.visitEnd();
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}
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}
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