Subversion Repositories openrisc

/***

 * ASM: a very small and fast Java bytecode manipulation framework

 * Copyright (c) 2000-2005 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.objectweb.asm.optimizer;

import org.objectweb.asm.AnnotationVisitor;

import org.objectweb.asm.Attribute;

import org.objectweb.asm.ClassAdapter;

import org.objectweb.asm.ClassVisitor;

import org.objectweb.asm.FieldVisitor;

import org.objectweb.asm.MethodVisitor;

import org.objectweb.asm.Opcodes;

/**

 * A {@link ClassAdapter} that renames fields and methods, and removes debug

 * info.

 *

 * @author Eric Bruneton

 */

public class ClassOptimizer extends ClassAdapter {

    private NameMapping mapping;

    private String className;

    private String pkgName;

    public ClassOptimizer(final ClassVisitor cv, final NameMapping mapping) {

        super(cv);

        this.mapping = mapping;

    }

    public String getClassName() {

        return className;

    }

    // ------------------------------------------------------------------------

    // Overriden methods

    // ------------------------------------------------------------------------

    public void visit(

        final int version,

        final int access,

        final String name,

        final String signature,

        final String superName,

        final String[] interfaces)

    {

        className = name;

        pkgName = name.substring(0, name.lastIndexOf('/'));

        cv.visit(version,

                access,

                mapping.map(name),

                null,

                mapping.map(superName),

                interfaces);

    }

    public void visitSource(final String source, final String debug) {

        // remove debug info

    }

    public void visitOuterClass(

        final String owner,

        final String name,

        final String desc)

    {

        // remove debug info

    }

    public AnnotationVisitor visitAnnotation(

        final String desc,

        final boolean visible)

    {

        throw new UnsupportedOperationException();

    }

    public void visitAttribute(final Attribute attr) {

        // remove non standard attribute

    }

    public void visitInnerClass(

        final String name,

        final String outerName,

        final String innerName,

        final int access)

    {

        // remove debug info

    }

    public FieldVisitor visitField(

        final int access,

        final String name,

        final String desc,

        final String signature,

        final Object value)

    {

        String s = className + "." + name;

        if ((access & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED)) == 0) {

            if ((access & Opcodes.ACC_FINAL) != 0

                    && (access & Opcodes.ACC_STATIC) != 0 && desc.equals("I"))

            {

                return null;

            }

            if (pkgName.equals("org/objectweb/asm")

                    && mapping.map(s).equals(name))

            {

                System.out.println("INFO: " + s + " could be renamed");

            }

            cv.visitField(access,

                    mapping.map(s),

                    mapping.fix(desc),

                    null,

                    value);

        } else {

            if (!mapping.map(s).equals(name)) {

                throw new RuntimeException("The public or protected field " + s

                        + " must not be renamed.");

            }

            cv.visitField(access, name, desc, null, value);

        }

        return null; // remove debug info

    }

    public MethodVisitor visitMethod(

        final int access,

        final String name,

        final String desc,

        final String signature,

        final String[] exceptions)

    {

        String s = className + "." + name + desc;

        if ((access & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED)) == 0) {

            if (pkgName.equals("org/objectweb/asm") && !name.startsWith("<")

                    && mapping.map(s).equals(name))

            {

                System.out.println("INFO: " + s + " could be renamed");

            }

            return new MethodOptimizer(cv.visitMethod(access,

                    mapping.map(s),

                    mapping.fix(desc),

                    null,

                    exceptions), mapping);

        } else {

            if (!mapping.map(s).equals(name)) {

                throw new RuntimeException("The public or protected method "

                        + s + " must not be renamed.");

            }

            return new MethodOptimizer(cv.visitMethod(access,

                    name,

                    desc,

                    null,

                    exceptions), mapping);

        }

    }

}