/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000,2002,2003 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 oracle.toplink.libraries.asm.util;
import oracle.toplink.libraries.asm.Label;
import oracle.toplink.libraries.asm.Attribute;
import oracle.toplink.libraries.asm.util.attrs.ASMifiable;
import java.util.HashMap;
/**
* A {@link PrintCodeVisitor} that prints the ASM code that
* generates the code it visits.
*
* @author Eric Bruneton, Eugene Kuleshov
*/
public class ASMifierCodeVisitor extends PrintCodeVisitor {
/**
* The label names. This map associate String values to Label keys.
*/
private final HashMap labelNames;
/**
* Constructs a new {@link ASMifierCodeVisitor} object.
*/
public ASMifierCodeVisitor () {
this.labelNames = new HashMap();
}
public void printInsn (final int opcode) {
buf.append("cv.visitInsn(").
append(OPCODES[opcode]).
append(");\n");
}
public void printIntInsn (final int opcode, final int operand) {
buf.append("cv.visitIntInsn(").
append(OPCODES[opcode]).
append(", ").
append(operand).
append(");\n");
}
public void printVarInsn (final int opcode, final int var) {
buf.append("cv.visitVarInsn(").
append(OPCODES[opcode]).
append(", ").
append(var).
append(");\n");
}
public void printTypeInsn (final int opcode, final String desc) {
buf.append("cv.visitTypeInsn(").
append(OPCODES[opcode]).
append(", ");
ASMifierClassVisitor.appendConstant(buf, desc);
buf.append(");\n");
}
public void printFieldInsn (
final int opcode,
final String owner,
final String name,
final String desc)
{
buf.append("cv.visitFieldInsn(")
.append(OPCODES[opcode])
.append(", ");
ASMifierClassVisitor.appendConstant(buf, owner);
buf.append(", ");
ASMifierClassVisitor.appendConstant(buf, name);
buf.append(", ");
ASMifierClassVisitor.appendConstant(buf, desc);
buf.append(");\n");
}
public void printMethodInsn (
final int opcode,
final String owner,
final String name,
final String desc)
{
buf.append("cv.visitMethodInsn(")
.append(OPCODES[opcode])
.append(", ");
ASMifierClassVisitor.appendConstant(buf, owner);
buf.append(", ");
ASMifierClassVisitor.appendConstant(buf, name);
buf.append(", ");
ASMifierClassVisitor.appendConstant(buf, desc);
buf.append(");\n");
}
public void printJumpInsn (final int opcode, final Label label) {
declareLabel(label);
buf.append("cv.visitJumpInsn(")
.append(OPCODES[opcode])
.append(", ");
appendLabel(label);
buf.append(");\n");
}
public void printLabel (final Label label) {
declareLabel(label);
buf.append("cv.visitLabel(");
appendLabel(label);
buf.append(");\n");
}
public void printLdcInsn (final Object cst) {
buf.append("cv.visitLdcInsn(");
ASMifierClassVisitor.appendConstant(buf, cst);
buf.append(");\n");
}
public void printIincInsn (final int var, final int increment) {
buf.append("cv.visitIincInsn(")
.append(var)
.append(", ")
.append(increment)
.append(");\n");
}
public void printTableSwitchInsn (
final int min,
final int max,
final Label dflt,
final Label labels[])
{
for (int i = 0; i < labels.length; ++i) {
declareLabel(labels[i]);
}
declareLabel(dflt);
buf.append("cv.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");
}
public void printLookupSwitchInsn (
final Label dflt,
final int keys[],
final Label labels[])
{
for (int i = 0; i < labels.length; ++i) {
declareLabel(labels[i]);
}
declareLabel(dflt);
buf.append("cv.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");
}
public void printMultiANewArrayInsn (final String desc, final int dims) {
buf.append("cv.visitMultiANewArrayInsn(");
ASMifierClassVisitor.appendConstant(buf, desc);
buf.append(", ")
.append(dims)
.append(");\n");
}
public void printTryCatchBlock (
final Label start,
final Label end,
final Label handler,
final String type)
{
buf.append("cv.visitTryCatchBlock(");
appendLabel(start);
buf.append(", ");
appendLabel(end);
buf.append(", ");
appendLabel(handler);
buf.append(", ");
ASMifierClassVisitor.appendConstant(buf, type);
buf.append(");\n");
}
public void printMaxs (final int maxStack, final int maxLocals) {
buf.append("cv.visitMaxs(")
.append(maxStack)
.append(", ")
.append(maxLocals)
.append(");\n");
}
public void printLocalVariable (
final String name,
final String desc,
final Label start,
final Label end,
final int index)
{
buf.append("cv.visitLocalVariable(");
ASMifierClassVisitor.appendConstant(buf, name);
buf.append(", ");
ASMifierClassVisitor.appendConstant(buf, desc);
buf.append(", ");
appendLabel(start);
buf.append(", ");
appendLabel(end);
buf.append(", ").append(index).append(");\n");
}
public void printLineNumber (final int line, final Label start) {
buf.append("cv.visitLineNumber(")
.append(line)
.append(", ");
appendLabel(start);
buf.append(");\n");
}
public void printAttribute (final Attribute attr) {
if (attr instanceof ASMifiable) {
buf.append("// CODE ATTRIBUTE\n");
((ASMifiable)attr).asmify(buf, "cv", labelNames);
} else {
buf.append("// WARNING! skipped a non standard code attribute of type \"");
buf.append(attr.type).append("\"\n");
}
}
/**
* 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
* <i>must</i> 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));
}
}
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