Scala example source code file (TraceMethodVisitor.java)

This example Scala source code file (TraceMethodVisitor.java) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

annotationvisitor, asm, attribute, label, methodvisitor, object, override, printer, string, traceannotationvisitor, tracemethodvisitor

The TraceMethodVisitor.java Scala example source code

/***
 * 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 scala.tools.asm.util;

import scala.tools.asm.AnnotationVisitor;
import scala.tools.asm.Attribute;
import scala.tools.asm.Handle;
import scala.tools.asm.Label;
import scala.tools.asm.MethodVisitor;
import scala.tools.asm.Opcodes;

/**
 * A {@link MethodVisitor} that prints the methods it visits with a
 * {@link Printer}.
 *
 * @author Eric Bruneton
 */
public final class TraceMethodVisitor extends MethodVisitor {

    public final Printer p;

    public TraceMethodVisitor(final Printer p) {
        this(null, p);
    }

    public TraceMethodVisitor(final MethodVisitor mv, final Printer p) {
        super(Opcodes.ASM4, mv);
        this.p = p;
    }

    @Override
    public AnnotationVisitor visitAnnotation(final String desc,
            final boolean visible) {
        Printer p = this.p.visitMethodAnnotation(desc, visible);
        AnnotationVisitor av = mv == null ? null : mv.visitAnnotation(desc,
                visible);
        return new TraceAnnotationVisitor(av, p);
    }

    @Override
    public void visitAttribute(final Attribute attr) {
        p.visitMethodAttribute(attr);
        super.visitAttribute(attr);
    }

    @Override
    public AnnotationVisitor visitAnnotationDefault() {
        Printer p = this.p.visitAnnotationDefault();
        AnnotationVisitor av = mv == null ? null : mv.visitAnnotationDefault();
        return new TraceAnnotationVisitor(av, p);
    }

    @Override
    public AnnotationVisitor visitParameterAnnotation(final int parameter,
            final String desc, final boolean visible) {
        Printer p = this.p.visitParameterAnnotation(parameter, desc, visible);
        AnnotationVisitor av = mv == null ? null : mv.visitParameterAnnotation(
                parameter, desc, visible);
        return new TraceAnnotationVisitor(av, p);
    }

    @Override
    public void visitCode() {
        p.visitCode();
        super.visitCode();
    }

    @Override
    public void visitFrame(final int type, final int nLocal,
            final Object[] local, final int nStack, final Object[] stack) {
        p.visitFrame(type, nLocal, local, nStack, stack);
        super.visitFrame(type, nLocal, local, nStack, stack);
    }

    @Override
    public void visitInsn(final int opcode) {
        p.visitInsn(opcode);
        super.visitInsn(opcode);
    }

    @Override
    public void visitIntInsn(final int opcode, final int operand) {
        p.visitIntInsn(opcode, operand);
        super.visitIntInsn(opcode, operand);
    }

    @Override
    public void visitVarInsn(final int opcode, final int var) {
        p.visitVarInsn(opcode, var);
        super.visitVarInsn(opcode, var);
    }

    @Override
    public void visitTypeInsn(final int opcode, final String type) {
        p.visitTypeInsn(opcode, type);
        super.visitTypeInsn(opcode, type);
    }

    @Override
    public void visitFieldInsn(final int opcode, final String owner,
            final String name, final String desc) {
        p.visitFieldInsn(opcode, owner, name, desc);
        super.visitFieldInsn(opcode, owner, name, desc);
    }

    @Override
    public void visitMethodInsn(final int opcode, final String owner,
            final String name, final String desc) {
        p.visitMethodInsn(opcode, owner, name, desc);
        super.visitMethodInsn(opcode, owner, name, desc);
    }

    @Override
    public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
            Object... bsmArgs) {
        p.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
        super.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
    }

    @Override
    public void visitJumpInsn(final int opcode, final Label label) {
        p.visitJumpInsn(opcode, label);
        super.visitJumpInsn(opcode, label);
    }

    @Override
    public void visitLabel(final Label label) {
        p.visitLabel(label);
        super.visitLabel(label);
    }

    @Override
    public void visitLdcInsn(final Object cst) {
        p.visitLdcInsn(cst);
        super.visitLdcInsn(cst);
    }

    @Override
    public void visitIincInsn(final int var, final int increment) {
        p.visitIincInsn(var, increment);
        super.visitIincInsn(var, increment);
    }

    @Override
    public void visitTableSwitchInsn(final int min, final int max,
            final Label dflt, final Label... labels) {
        p.visitTableSwitchInsn(min, max, dflt, labels);
        super.visitTableSwitchInsn(min, max, dflt, labels);
    }

    @Override
    public void visitLookupSwitchInsn(final Label dflt, final int[] keys,
            final Label[] labels) {
        p.visitLookupSwitchInsn(dflt, keys, labels);
        super.visitLookupSwitchInsn(dflt, keys, labels);
    }

    @Override
    public void visitMultiANewArrayInsn(final String desc, final int dims) {
        p.visitMultiANewArrayInsn(desc, dims);
        super.visitMultiANewArrayInsn(desc, dims);
    }

    @Override
    public void visitTryCatchBlock(final Label start, final Label end,
            final Label handler, final String type) {
        p.visitTryCatchBlock(start, end, handler, type);
        super.visitTryCatchBlock(start, end, handler, type);
    }

    @Override
    public void visitLocalVariable(final String name, final String desc,
            final String signature, final Label start, final Label end,
            final int index) {
        p.visitLocalVariable(name, desc, signature, start, end, index);
        super.visitLocalVariable(name, desc, signature, start, end, index);
    }

    @Override
    public void visitLineNumber(final int line, final Label start) {
        p.visitLineNumber(line, start);
        super.visitLineNumber(line, start);
    }

    @Override
    public void visitMaxs(final int maxStack, final int maxLocals) {
        p.visitMaxs(maxStack, maxLocals);
        super.visitMaxs(maxStack, maxLocals);
    }

    @Override
    public void visitEnd() {
        p.visitMethodEnd();
        super.visitEnd();
    }
}