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/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2007 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.mockito.asm.util;
import org.mockito.asm.AnnotationVisitor;
import org.mockito.asm.Label;
import org.mockito.asm.MethodVisitor;
import org.mockito.asm.Opcodes;
import java.util.HashMap;
/**
* A {@link MethodVisitor} that prints the ASM code that generates the methods
* it visits.
*
* @author Eric Bruneton
* @author Eugene Kuleshov
*/
public class ASMifierMethodVisitor extends ASMifierAbstractVisitor implements
MethodVisitor
{
/**
* Constructs a new {@link ASMifierMethodVisitor} object.
*/
public ASMifierMethodVisitor() {
super("mv");
this.labelNames = new HashMap();
}
public AnnotationVisitor visitAnnotationDefault() {
buf.setLength(0);
buf.append("{\n").append("av0 = mv.visitAnnotationDefault();\n");
text.add(buf.toString());
ASMifierAnnotationVisitor av = new ASMifierAnnotationVisitor(0);
text.add(av.getText());
text.add("}\n");
return av;
}
public AnnotationVisitor visitParameterAnnotation(
final int parameter,
final String desc,
final boolean visible)
{
buf.setLength(0);
buf.append("{\n")
.append("av0 = mv.visitParameterAnnotation(")
.append(parameter)
.append(", ");
appendConstant(desc);
buf.append(", ").append(visible).append(");\n");
text.add(buf.toString());
ASMifierAnnotationVisitor av = new ASMifierAnnotationVisitor(0);
text.add(av.getText());
text.add("}\n");
return av;
}
public void visitCode() {
text.add("mv.visitCode();\n");
}
public void visitFrame(
final int type,
final int nLocal,
final Object[] local,
final int nStack,
final Object[] stack)
{
buf.setLength(0);
switch (type) {
case Opcodes.F_NEW:
case Opcodes.F_FULL:
declareFrameTypes(nLocal, local);
declareFrameTypes(nStack, stack);
if (type == Opcodes.F_NEW) {
buf.append("mv.visitFrame(Opcodes.F_NEW, ");
} else {
buf.append("mv.visitFrame(Opcodes.F_FULL, ");
}
buf.append(nLocal).append(", new Object[] {");
appendFrameTypes(nLocal, local);
buf.append("}, ").append(nStack).append(", new Object[] {");
appendFrameTypes(nStack, stack);
buf.append('}');
break;
case Opcodes.F_APPEND:
declareFrameTypes(nLocal, local);
buf.append("mv.visitFrame(Opcodes.F_APPEND,")
.append(nLocal)
.append(", new Object[] {");
appendFrameTypes(nLocal, local);
buf.append("}, 0, null");
break;
case Opcodes.F_CHOP:
buf.append("mv.visitFrame(Opcodes.F_CHOP,")
.append(nLocal)
.append(", null, 0, null");
break;
case Opcodes.F_SAME:
buf.append("mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null");
break;
case Opcodes.F_SAME1:
declareFrameTypes(1, stack);
buf.append("mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {");
appendFrameTypes(1, stack);
buf.append('}');
break;
}
buf.append(");\n");
text.add(buf.toString());
}
public void visitInsn(final int opcode) {
buf.setLength(0);
buf.append("mv.visitInsn(").append(OPCODES[opcode]).append(");\n");
text.add(buf.toString());
}
public void visitIntInsn(final int opcode, final int operand) {
buf.setLength(0);
buf.append("mv.visitIntInsn(")
.append(OPCODES[opcode])
.append(", ")
.append(opcode == Opcodes.NEWARRAY
? TYPES[operand]
: Integer.toString(operand))
.append(");\n");
text.add(buf.toString());
}
public void visitVarInsn(final int opcode, final int var) {
buf.setLength(0);
buf.append("mv.visitVarInsn(")
.append(OPCODES[opcode])
.append(", ")
.append(var)
.append(");\n");
text.add(buf.toString());
}
public void visitTypeInsn(final int opcode, final String type) {
buf.setLength(0);
buf.append("mv.visitTypeInsn(").append(OPCODES[opcode]).append(", ");
appendConstant(type);
buf.append(");\n");
text.add(buf.toString());
}
public void visitFieldInsn(
final int opcode,
final String owner,
final String name,
final String desc)
{
buf.setLength(0);
buf.append("mv.visitFieldInsn(").append(OPCODES[opcode]).append(", ");
appendConstant(owner);
buf.append(", ");
appendConstant(name);
buf.append(", ");
appendConstant(desc);
buf.append(");\n");
text.add(buf.toString());
}
public void visitMethodInsn(
final int opcode,
final String owner,
final String name,
final String desc)
{
buf.setLength(0);
buf.append("mv.visitMethodInsn(").append(OPCODES[opcode]).append(", ");
appendConstant(owner);
buf.append(", ");
appendConstant(name);
buf.append(", ");
appendConstant(desc);
buf.append(");\n");
text.add(buf.toString());
}
public void visitJumpInsn(final int opcode, final Label label) {
buf.setLength(0);
declareLabel(label);
buf.append("mv.visitJumpInsn(").append(OPCODES[opcode]).append(", ");
appendLabel(label);
buf.append(");\n");
text.add(buf.toString());
}
public void visitLabel(final Label label) {
buf.setLength(0);
declareLabel(label);
buf.append("mv.visitLabel(");
appendLabel(label);
buf.append(");\n");
text.add(buf.toString());
}
public void visitLdcInsn(final Object cst) {
buf.setLength(0);
buf.append("mv.visitLdcInsn(");
appendConstant(cst);
buf.append(");\n");
text.add(buf.toString());
}
public void visitIincInsn(final int var, final int increment) {
buf.setLength(0);
buf.append("mv.visitIincInsn(")
.append(var)
.append(", ")
.append(increment)
.append(");\n");
text.add(buf.toString());
}
public void visitTableSwitchInsn(
final int min,
final int max,
final Label dflt,
final Label[] labels)
{
buf.setLength(0);
for (int i = 0; i < labels.length; ++i) {
declareLabel(labels[i]);
}
declareLabel(dflt);
buf.append("mv.visitTableSwitchInsn(")
.append(min)
.append(", ")
.append(max)
.append(", ");
appendLabel(dflt);
buf.append(", new Label[] {");
for (int i = 0; i < labels.length; ++i) {
buf.append(i == 0 ? " " : ", ");
appendLabel(labels[i]);
}
buf.append(" });\n");
text.add(buf.toString());
}
public void visitLookupSwitchInsn(
final Label dflt,
final int[] keys,
final Label[] labels)
{
buf.setLength(0);
for (int i = 0; i < labels.length; ++i) {
declareLabel(labels[i]);
}
declareLabel(dflt);
buf.append("mv.visitLookupSwitchInsn(");
appendLabel(dflt);
buf.append(", new int[] {");
for (int i = 0; i < keys.length; ++i) {
buf.append(i == 0 ? " " : ", ").append(keys[i]);
}
buf.append(" }, new Label[] {");
for (int i = 0; i < labels.length; ++i) {
buf.append(i == 0 ? " " : ", ");
appendLabel(labels[i]);
}
buf.append(" });\n");
text.add(buf.toString());
}
public void visitMultiANewArrayInsn(final String desc, final int dims) {
buf.setLength(0);
buf.append("mv.visitMultiANewArrayInsn(");
appendConstant(desc);
buf.append(", ").append(dims).append(");\n");
text.add(buf.toString());
}
public void visitTryCatchBlock(
final Label start,
final Label end,
final Label handler,
final String type)
{
buf.setLength(0);
declareLabel(start);
declareLabel(end);
declareLabel(handler);
buf.append("mv.visitTryCatchBlock(");
appendLabel(start);
buf.append(", ");
appendLabel(end);
buf.append(", ");
appendLabel(handler);
buf.append(", ");
appendConstant(type);
buf.append(");\n");
text.add(buf.toString());
}
public void visitLocalVariable(
final String name,
final String desc,
final String signature,
final Label start,
final Label end,
final int index)
{
buf.setLength(0);
buf.append("mv.visitLocalVariable(");
appendConstant(name);
buf.append(", ");
appendConstant(desc);
buf.append(", ");
appendConstant(signature);
buf.append(", ");
appendLabel(start);
buf.append(", ");
appendLabel(end);
buf.append(", ").append(index).append(");\n");
text.add(buf.toString());
}
public void visitLineNumber(final int line, final Label start) {
buf.setLength(0);
buf.append("mv.visitLineNumber(").append(line).append(", ");
appendLabel(start);
buf.append(");\n");
text.add(buf.toString());
}
public void visitMaxs(final int maxStack, final int maxLocals) {
buf.setLength(0);
buf.append("mv.visitMaxs(")
.append(maxStack)
.append(", ")
.append(maxLocals)
.append(");\n");
text.add(buf.toString());
}
private void declareFrameTypes(final int n, final Object[] o) {
for (int i = 0; i < n; ++i) {
if (o[i] instanceof Label) {
declareLabel((Label) o[i]);
}
}
}
private void appendFrameTypes(final int n, final Object[] o) {
for (int i = 0; i < n; ++i) {
if (i > 0) {
buf.append(", ");
}
if (o[i] instanceof String) {
appendConstant(o[i]);
} else if (o[i] instanceof Integer) {
switch (((Integer) o[i]).intValue()) {
case 0:
buf.append("Opcodes.TOP");
break;
case 1:
buf.append("Opcodes.INTEGER");
break;
case 2:
buf.append("Opcodes.FLOAT");
break;
case 3:
buf.append("Opcodes.DOUBLE");
break;
case 4:
buf.append("Opcodes.LONG");
break;
case 5:
buf.append("Opcodes.NULL");
break;
case 6:
buf.append("Opcodes.UNINITIALIZED_THIS");
break;
}
} else {
appendLabel((Label) o[i]);
}
}
}
/**
* Appends a declaration of the given label to {@link #buf buf}. This
* declaration is of the form "Label lXXX = new Label();". Does nothing if
* the given label has already been declared.
*
* @param l a label.
*/
private void declareLabel(final Label l) {
String name = (String) labelNames.get(l);
if (name == null) {
name = "l" + labelNames.size();
labelNames.put(l, name);
buf.append("Label ").append(name).append(" = new Label();\n");
}
}
/**
* Appends the name of the given label to {@link #buf buf}. The given label
* must already have a name. One way to ensure this is to always
* call {@link #declareLabel declared} before calling this method.
*
* @param l a label.
*/
private void appendLabel(final Label l) {
buf.append((String) labelNames.get(l));
}
}
