org.snapscript.asm.util.ASMifier Maven / Gradle / Ivy
/***
* 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 org.snapscript.asm.util;
import java.io.FileInputStream;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
import org.snapscript.asm.Attribute;
import org.snapscript.asm.ClassReader;
import org.snapscript.asm.Handle;
import org.snapscript.asm.Label;
import org.snapscript.asm.Opcodes;
import org.snapscript.asm.Type;
import org.snapscript.asm.TypePath;
/**
* A {@link Printer} that prints the ASM code to generate the classes if visits.
*
* @author Eric Bruneton
*/
public class ASMifier extends Printer {
/**
* The name of the visitor variable in the produced code.
*/
protected final String name;
/**
* Identifier of the annotation visitor variable in the produced code.
*/
protected final int id;
/**
* The label names. This map associates String values to Label keys. It is
* used only in ASMifierMethodVisitor.
*/
protected Map labelNames;
/**
* Pseudo access flag used to distinguish class access flags.
*/
private static final int ACCESS_CLASS = 262144;
/**
* Pseudo access flag used to distinguish field access flags.
*/
private static final int ACCESS_FIELD = 524288;
/**
* Pseudo access flag used to distinguish inner class flags.
*/
private static final int ACCESS_INNER = 1048576;
/**
* Constructs a new {@link ASMifier}. Subclasses must not use this
* constructor. Instead, they must use the
* {@link #ASMifier(int, String, int)} version.
*
* @throws IllegalStateException
* If a subclass calls this constructor.
*/
public ASMifier() {
this(Opcodes.ASM5, "cw", 0);
if (getClass() != ASMifier.class) {
throw new IllegalStateException();
}
}
/**
* Constructs a new {@link ASMifier}.
*
* @param api
* the ASM API version implemented by this class. Must be one of
* {@link Opcodes#ASM4} or {@link Opcodes#ASM5}.
* @param name
* the name of the visitor variable in the produced code.
* @param id
* identifier of the annotation visitor variable in the produced
* code.
*/
protected ASMifier(final int api, final String name, final int id) {
super(api);
this.name = name;
this.id = id;
}
/**
* Prints the ASM source code to generate the given class to the standard
* output.
*
* Usage: ASMifier [-debug] <binary class name or class file name>
*
* @param args
* the command line arguments.
*
* @throws Exception
* if the class cannot be found, or if an IO exception occurs.
*/
public static void main(final String[] args) throws Exception {
int i = 0;
int flags = ClassReader.SKIP_DEBUG;
boolean ok = true;
if (args.length < 1 || args.length > 2) {
ok = false;
}
if (ok && "-debug".equals(args[0])) {
i = 1;
flags = 0;
if (args.length != 2) {
ok = false;
}
}
if (!ok) {
System.err
.println("Prints the ASM code to generate the given class.");
System.err.println("Usage: ASMifier [-debug] "
+ "");
return;
}
ClassReader cr;
if (args[i].endsWith(".class") || args[i].indexOf('\\') > -1
|| args[i].indexOf('/') > -1) {
cr = new ClassReader(new FileInputStream(args[i]));
} else {
cr = new ClassReader(args[i]);
}
cr.accept(new TraceClassVisitor(null, new ASMifier(), new PrintWriter(
System.out)), flags);
}
// ------------------------------------------------------------------------
// Classes
// ------------------------------------------------------------------------
@Override
public void visit(final int version, final int access, final String name,
final String signature, final String superName,
final String[] interfaces) {
String simpleName;
int n = name.lastIndexOf('/');
if (n == -1) {
simpleName = name;
} else {
text.add("package asm." + name.substring(0, n).replace('/', '.')
+ ";\n");
simpleName = name.substring(n + 1);
}
text.add("import java.util.*;\n");
text.add("import org.objectweb.asm.*;\n");
text.add("public class " + simpleName + "Dump implements Opcodes {\n\n");
text.add("public static byte[] dump () throws Exception {\n\n");
text.add("ClassWriter cw = new ClassWriter(0);\n");
text.add("FieldVisitor fv;\n");
text.add("MethodVisitor mv;\n");
text.add("AnnotationVisitor av0;\n\n");
buf.setLength(0);
buf.append("cw.visit(");
switch (version) {
case Opcodes.V1_1:
buf.append("V1_1");
break;
case Opcodes.V1_2:
buf.append("V1_2");
break;
case Opcodes.V1_3:
buf.append("V1_3");
break;
case Opcodes.V1_4:
buf.append("V1_4");
break;
case Opcodes.V1_5:
buf.append("V1_5");
break;
case Opcodes.V1_6:
buf.append("V1_6");
break;
case Opcodes.V1_7:
buf.append("V1_7");
break;
default:
buf.append(version);
break;
}
buf.append(", ");
appendAccess(access | ACCESS_CLASS);
buf.append(", ");
appendConstant(name);
buf.append(", ");
appendConstant(signature);
buf.append(", ");
appendConstant(superName);
buf.append(", ");
if (interfaces != null && interfaces.length > 0) {
buf.append("new String[] {");
for (int i = 0; i < interfaces.length; ++i) {
buf.append(i == 0 ? " " : ", ");
appendConstant(interfaces[i]);
}
buf.append(" }");
} else {
buf.append("null");
}
buf.append(");\n\n");
text.add(buf.toString());
}
@Override
public void visitSource(final String file, final String debug) {
buf.setLength(0);
buf.append("cw.visitSource(");
appendConstant(file);
buf.append(", ");
appendConstant(debug);
buf.append(");\n\n");
text.add(buf.toString());
}
@Override
public void visitOuterClass(final String owner, final String name,
final String desc) {
buf.setLength(0);
buf.append("cw.visitOuterClass(");
appendConstant(owner);
buf.append(", ");
appendConstant(name);
buf.append(", ");
appendConstant(desc);
buf.append(");\n\n");
text.add(buf.toString());
}
@Override
public ASMifier visitClassAnnotation(final String desc,
final boolean visible) {
return visitAnnotation(desc, visible);
}
@Override
public ASMifier visitClassTypeAnnotation(final int typeRef,
final TypePath typePath, final String desc, final boolean visible) {
return visitTypeAnnotation(typeRef, typePath, desc, visible);
}
@Override
public void visitClassAttribute(final Attribute attr) {
visitAttribute(attr);
}
@Override
public void visitInnerClass(final String name, final String outerName,
final String innerName, final int access) {
buf.setLength(0);
buf.append("cw.visitInnerClass(");
appendConstant(name);
buf.append(", ");
appendConstant(outerName);
buf.append(", ");
appendConstant(innerName);
buf.append(", ");
appendAccess(access | ACCESS_INNER);
buf.append(");\n\n");
text.add(buf.toString());
}
@Override
public ASMifier visitField(final int access, final String name,
final String desc, final String signature, final Object value) {
buf.setLength(0);
buf.append("{\n");
buf.append("fv = cw.visitField(");
appendAccess(access | ACCESS_FIELD);
buf.append(", ");
appendConstant(name);
buf.append(", ");
appendConstant(desc);
buf.append(", ");
appendConstant(signature);
buf.append(", ");
appendConstant(value);
buf.append(");\n");
text.add(buf.toString());
ASMifier a = createASMifier("fv", 0);
text.add(a.getText());
text.add("}\n");
return a;
}
@Override
public ASMifier visitMethod(final int access, final String name,
final String desc, final String signature, final String[] exceptions) {
buf.setLength(0);
buf.append("{\n");
buf.append("mv = cw.visitMethod(");
appendAccess(access);
buf.append(", ");
appendConstant(name);
buf.append(", ");
appendConstant(desc);
buf.append(", ");
appendConstant(signature);
buf.append(", ");
if (exceptions != null && exceptions.length > 0) {
buf.append("new String[] {");
for (int i = 0; i < exceptions.length; ++i) {
buf.append(i == 0 ? " " : ", ");
appendConstant(exceptions[i]);
}
buf.append(" }");
} else {
buf.append("null");
}
buf.append(");\n");
text.add(buf.toString());
ASMifier a = createASMifier("mv", 0);
text.add(a.getText());
text.add("}\n");
return a;
}
@Override
public void visitClassEnd() {
text.add("cw.visitEnd();\n\n");
text.add("return cw.toByteArray();\n");
text.add("}\n");
text.add("}\n");
}
// ------------------------------------------------------------------------
// Annotations
// ------------------------------------------------------------------------
@Override
public void visit(final String name, final Object value) {
buf.setLength(0);
buf.append("av").append(id).append(".visit(");
appendConstant(buf, name);
buf.append(", ");
appendConstant(buf, value);
buf.append(");\n");
text.add(buf.toString());
}
@Override
public void visitEnum(final String name, final String desc,
final String value) {
buf.setLength(0);
buf.append("av").append(id).append(".visitEnum(");
appendConstant(buf, name);
buf.append(", ");
appendConstant(buf, desc);
buf.append(", ");
appendConstant(buf, value);
buf.append(");\n");
text.add(buf.toString());
}
@Override
public ASMifier visitAnnotation(final String name, final String desc) {
buf.setLength(0);
buf.append("{\n");
buf.append("AnnotationVisitor av").append(id + 1).append(" = av");
buf.append(id).append(".visitAnnotation(");
appendConstant(buf, name);
buf.append(", ");
appendConstant(buf, desc);
buf.append(");\n");
text.add(buf.toString());
ASMifier a = createASMifier("av", id + 1);
text.add(a.getText());
text.add("}\n");
return a;
}
@Override
public ASMifier visitArray(final String name) {
buf.setLength(0);
buf.append("{\n");
buf.append("AnnotationVisitor av").append(id + 1).append(" = av");
buf.append(id).append(".visitArray(");
appendConstant(buf, name);
buf.append(");\n");
text.add(buf.toString());
ASMifier a = createASMifier("av", id + 1);
text.add(a.getText());
text.add("}\n");
return a;
}
@Override
public void visitAnnotationEnd() {
buf.setLength(0);
buf.append("av").append(id).append(".visitEnd();\n");
text.add(buf.toString());
}
// ------------------------------------------------------------------------
// Fields
// ------------------------------------------------------------------------
@Override
public ASMifier visitFieldAnnotation(final String desc,
final boolean visible) {
return visitAnnotation(desc, visible);
}
@Override
public ASMifier visitFieldTypeAnnotation(final int typeRef,
final TypePath typePath, final String desc, final boolean visible) {
return visitTypeAnnotation(typeRef, typePath, desc, visible);
}
@Override
public void visitFieldAttribute(final Attribute attr) {
visitAttribute(attr);
}
@Override
public void visitFieldEnd() {
buf.setLength(0);
buf.append(name).append(".visitEnd();\n");
text.add(buf.toString());
}
// ------------------------------------------------------------------------
// Methods
// ------------------------------------------------------------------------
@Override
public void visitParameter(String parameterName, int access) {
buf.setLength(0);
buf.append(name).append(".visitParameter(");
appendString(buf, parameterName);
buf.append(", ");
appendAccess(access);
text.add(buf.append(");\n").toString());
}
@Override
public ASMifier visitAnnotationDefault() {
buf.setLength(0);
buf.append("{\n").append("av0 = ").append(name)
.append(".visitAnnotationDefault();\n");
text.add(buf.toString());
ASMifier a = createASMifier("av", 0);
text.add(a.getText());
text.add("}\n");
return a;
}
@Override
public ASMifier visitMethodAnnotation(final String desc,
final boolean visible) {
return visitAnnotation(desc, visible);
}
@Override
public ASMifier visitMethodTypeAnnotation(final int typeRef,
final TypePath typePath, final String desc, final boolean visible) {
return visitTypeAnnotation(typeRef, typePath, desc, visible);
}
@Override
public ASMifier visitParameterAnnotation(final int parameter,
final String desc, final boolean visible) {
buf.setLength(0);
buf.append("{\n").append("av0 = ").append(name)
.append(".visitParameterAnnotation(").append(parameter)
.append(", ");
appendConstant(desc);
buf.append(", ").append(visible).append(");\n");
text.add(buf.toString());
ASMifier a = createASMifier("av", 0);
text.add(a.getText());
text.add("}\n");
return a;
}
@Override
public void visitMethodAttribute(final Attribute attr) {
visitAttribute(attr);
}
@Override
public void visitCode() {
text.add(name + ".visitCode();\n");
}
@Override
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(name).append(".visitFrame(Opcodes.F_NEW, ");
} else {
buf.append(name).append(".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(name).append(".visitFrame(Opcodes.F_APPEND,")
.append(nLocal).append(", new Object[] {");
appendFrameTypes(nLocal, local);
buf.append("}, 0, null");
break;
case Opcodes.F_CHOP:
buf.append(name).append(".visitFrame(Opcodes.F_CHOP,")
.append(nLocal).append(", null, 0, null");
break;
case Opcodes.F_SAME:
buf.append(name).append(
".visitFrame(Opcodes.F_SAME, 0, null, 0, null");
break;
case Opcodes.F_SAME1:
declareFrameTypes(1, stack);
buf.append(name).append(
".visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {");
appendFrameTypes(1, stack);
buf.append('}');
break;
}
buf.append(");\n");
text.add(buf.toString());
}
@Override
public void visitInsn(final int opcode) {
buf.setLength(0);
buf.append(name).append(".visitInsn(").append(OPCODES[opcode])
.append(");\n");
text.add(buf.toString());
}
@Override
public void visitIntInsn(final int opcode, final int operand) {
buf.setLength(0);
buf.append(name)
.append(".visitIntInsn(")
.append(OPCODES[opcode])
.append(", ")
.append(opcode == Opcodes.NEWARRAY ? TYPES[operand] : Integer
.toString(operand)).append(");\n");
text.add(buf.toString());
}
@Override
public void visitVarInsn(final int opcode, final int var) {
buf.setLength(0);
buf.append(name).append(".visitVarInsn(").append(OPCODES[opcode])
.append(", ").append(var).append(");\n");
text.add(buf.toString());
}
@Override
public void visitTypeInsn(final int opcode, final String type) {
buf.setLength(0);
buf.append(name).append(".visitTypeInsn(").append(OPCODES[opcode])
.append(", ");
appendConstant(type);
buf.append(");\n");
text.add(buf.toString());
}
@Override
public void visitFieldInsn(final int opcode, final String owner,
final String name, final String desc) {
buf.setLength(0);
buf.append(this.name).append(".visitFieldInsn(")
.append(OPCODES[opcode]).append(", ");
appendConstant(owner);
buf.append(", ");
appendConstant(name);
buf.append(", ");
appendConstant(desc);
buf.append(");\n");
text.add(buf.toString());
}
@Deprecated
@Override
public void visitMethodInsn(final int opcode, final String owner,
final String name, final String desc) {
if (api >= Opcodes.ASM5) {
super.visitMethodInsn(opcode, owner, name, desc);
return;
}
doVisitMethodInsn(opcode, owner, name, desc,
opcode == Opcodes.INVOKEINTERFACE);
}
@Override
public void visitMethodInsn(final int opcode, final String owner,
final String name, final String desc, final boolean itf) {
if (api < Opcodes.ASM5) {
super.visitMethodInsn(opcode, owner, name, desc, itf);
return;
}
doVisitMethodInsn(opcode, owner, name, desc, itf);
}
private void doVisitMethodInsn(final int opcode, final String owner,
final String name, final String desc, final boolean itf) {
buf.setLength(0);
buf.append(this.name).append(".visitMethodInsn(")
.append(OPCODES[opcode]).append(", ");
appendConstant(owner);
buf.append(", ");
appendConstant(name);
buf.append(", ");
appendConstant(desc);
buf.append(", ");
buf.append(itf ? "true" : "false");
buf.append(");\n");
text.add(buf.toString());
}
@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
Object... bsmArgs) {
buf.setLength(0);
buf.append(this.name).append(".visitInvokeDynamicInsn(");
appendConstant(name);
buf.append(", ");
appendConstant(desc);
buf.append(", ");
appendConstant(bsm);
buf.append(", new Object[]{");
for (int i = 0; i < bsmArgs.length; ++i) {
appendConstant(bsmArgs[i]);
if (i != bsmArgs.length - 1) {
buf.append(", ");
}
}
buf.append("});\n");
text.add(buf.toString());
}
@Override
public void visitJumpInsn(final int opcode, final Label label) {
buf.setLength(0);
declareLabel(label);
buf.append(name).append(".visitJumpInsn(").append(OPCODES[opcode])
.append(", ");
appendLabel(label);
buf.append(");\n");
text.add(buf.toString());
}
@Override
public void visitLabel(final Label label) {
buf.setLength(0);
declareLabel(label);
buf.append(name).append(".visitLabel(");
appendLabel(label);
buf.append(");\n");
text.add(buf.toString());
}
@Override
public void visitLdcInsn(final Object cst) {
buf.setLength(0);
buf.append(name).append(".visitLdcInsn(");
appendConstant(cst);
buf.append(");\n");
text.add(buf.toString());
}
@Override
public void visitIincInsn(final int var, final int increment) {
buf.setLength(0);
buf.append(name).append(".visitIincInsn(").append(var).append(", ")
.append(increment).append(");\n");
text.add(buf.toString());
}
@Override
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(name).append(".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());
}
@Override
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(name).append(".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());
}
@Override
public void visitMultiANewArrayInsn(final String desc, final int dims) {
buf.setLength(0);
buf.append(name).append(".visitMultiANewArrayInsn(");
appendConstant(desc);
buf.append(", ").append(dims).append(");\n");
text.add(buf.toString());
}
@Override
public ASMifier visitInsnAnnotation(final int typeRef,
final TypePath typePath, final String desc, final boolean visible) {
return visitTypeAnnotation("visitInsnAnnotation", typeRef, typePath,
desc, visible);
}
@Override
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(name).append(".visitTryCatchBlock(");
appendLabel(start);
buf.append(", ");
appendLabel(end);
buf.append(", ");
appendLabel(handler);
buf.append(", ");
appendConstant(type);
buf.append(");\n");
text.add(buf.toString());
}
@Override
public ASMifier visitTryCatchAnnotation(final int typeRef,
final TypePath typePath, final String desc, final boolean visible) {
return visitTypeAnnotation("visitTryCatchAnnotation", typeRef,
typePath, desc, visible);
}
@Override
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(this.name).append(".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());
}
@Override
public Printer visitLocalVariableAnnotation(int typeRef, TypePath typePath,
Label[] start, Label[] end, int[] index, String desc,
boolean visible) {
buf.setLength(0);
buf.append("{\n").append("av0 = ").append(name)
.append(".visitLocalVariableAnnotation(");
buf.append(typeRef);
if (typePath == null) {
buf.append(", null, ");
} else {
buf.append(", TypePath.fromString(\"").append(typePath).append("\"), ");
}
buf.append("new Label[] {");
for (int i = 0; i < start.length; ++i) {
buf.append(i == 0 ? " " : ", ");
appendLabel(start[i]);
}
buf.append(" }, new Label[] {");
for (int i = 0; i < end.length; ++i) {
buf.append(i == 0 ? " " : ", ");
appendLabel(end[i]);
}
buf.append(" }, new int[] {");
for (int i = 0; i < index.length; ++i) {
buf.append(i == 0 ? " " : ", ").append(index[i]);
}
buf.append(" }, ");
appendConstant(desc);
buf.append(", ").append(visible).append(");\n");
text.add(buf.toString());
ASMifier a = createASMifier("av", 0);
text.add(a.getText());
text.add("}\n");
return a;
}
@Override
public void visitLineNumber(final int line, final Label start) {
buf.setLength(0);
buf.append(name).append(".visitLineNumber(").append(line).append(", ");
appendLabel(start);
buf.append(");\n");
text.add(buf.toString());
}
@Override
public void visitMaxs(final int maxStack, final int maxLocals) {
buf.setLength(0);
buf.append(name).append(".visitMaxs(").append(maxStack).append(", ")
.append(maxLocals).append(");\n");
text.add(buf.toString());
}
@Override
public void visitMethodEnd() {
buf.setLength(0);
buf.append(name).append(".visitEnd();\n");
text.add(buf.toString());
}
// ------------------------------------------------------------------------
// Common methods
// ------------------------------------------------------------------------
public ASMifier visitAnnotation(final String desc, final boolean visible) {
buf.setLength(0);
buf.append("{\n").append("av0 = ").append(name)
.append(".visitAnnotation(");
appendConstant(desc);
buf.append(", ").append(visible).append(");\n");
text.add(buf.toString());
ASMifier a = createASMifier("av", 0);
text.add(a.getText());
text.add("}\n");
return a;
}
public ASMifier visitTypeAnnotation(final int typeRef,
final TypePath typePath, final String desc, final boolean visible) {
return visitTypeAnnotation("visitTypeAnnotation", typeRef, typePath,
desc, visible);
}
public ASMifier visitTypeAnnotation(final String method, final int typeRef,
final TypePath typePath, final String desc, final boolean visible) {
buf.setLength(0);
buf.append("{\n").append("av0 = ").append(name).append(".")
.append(method).append("(");
buf.append(typeRef);
if (typePath == null) {
buf.append(", null, ");
} else {
buf.append(", TypePath.fromString(\"").append(typePath).append("\"), ");
}
appendConstant(desc);
buf.append(", ").append(visible).append(");\n");
text.add(buf.toString());
ASMifier a = createASMifier("av", 0);
text.add(a.getText());
text.add("}\n");
return a;
}
public void visitAttribute(final Attribute attr) {
buf.setLength(0);
buf.append("// ATTRIBUTE ").append(attr.type).append('\n');
if (attr instanceof ASMifiable) {
if (labelNames == null) {
labelNames = new HashMap();
}
buf.append("{\n");
((ASMifiable) attr).asmify(buf, "attr", labelNames);
buf.append(name).append(".visitAttribute(attr);\n");
buf.append("}\n");
}
text.add(buf.toString());
}
// ------------------------------------------------------------------------
// Utility methods
// ------------------------------------------------------------------------
protected ASMifier createASMifier(final String name, final int id) {
return new ASMifier(Opcodes.ASM5, name, id);
}
/**
* Appends a string representation of the given access modifiers to
* {@link #buf buf}.
*
* @param access
* some access modifiers.
*/
void appendAccess(final int access) {
boolean first = true;
if ((access & Opcodes.ACC_PUBLIC) != 0) {
buf.append("ACC_PUBLIC");
first = false;
}
if ((access & Opcodes.ACC_PRIVATE) != 0) {
buf.append("ACC_PRIVATE");
first = false;
}
if ((access & Opcodes.ACC_PROTECTED) != 0) {
buf.append("ACC_PROTECTED");
first = false;
}
if ((access & Opcodes.ACC_FINAL) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_FINAL");
first = false;
}
if ((access & Opcodes.ACC_STATIC) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_STATIC");
first = false;
}
if ((access & Opcodes.ACC_SYNCHRONIZED) != 0) {
if (!first) {
buf.append(" + ");
}
if ((access & ACCESS_CLASS) == 0) {
buf.append("ACC_SYNCHRONIZED");
} else {
buf.append("ACC_SUPER");
}
first = false;
}
if ((access & Opcodes.ACC_VOLATILE) != 0
&& (access & ACCESS_FIELD) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_VOLATILE");
first = false;
}
if ((access & Opcodes.ACC_BRIDGE) != 0 && (access & ACCESS_CLASS) == 0
&& (access & ACCESS_FIELD) == 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_BRIDGE");
first = false;
}
if ((access & Opcodes.ACC_VARARGS) != 0 && (access & ACCESS_CLASS) == 0
&& (access & ACCESS_FIELD) == 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_VARARGS");
first = false;
}
if ((access & Opcodes.ACC_TRANSIENT) != 0
&& (access & ACCESS_FIELD) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_TRANSIENT");
first = false;
}
if ((access & Opcodes.ACC_NATIVE) != 0 && (access & ACCESS_CLASS) == 0
&& (access & ACCESS_FIELD) == 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_NATIVE");
first = false;
}
if ((access & Opcodes.ACC_ENUM) != 0
&& ((access & ACCESS_CLASS) != 0
|| (access & ACCESS_FIELD) != 0 || (access & ACCESS_INNER) != 0)) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_ENUM");
first = false;
}
if ((access & Opcodes.ACC_ANNOTATION) != 0
&& ((access & ACCESS_CLASS) != 0 || (access & ACCESS_INNER) != 0)) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_ANNOTATION");
first = false;
}
if ((access & Opcodes.ACC_ABSTRACT) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_ABSTRACT");
first = false;
}
if ((access & Opcodes.ACC_INTERFACE) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_INTERFACE");
first = false;
}
if ((access & Opcodes.ACC_STRICT) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_STRICT");
first = false;
}
if ((access & Opcodes.ACC_SYNTHETIC) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_SYNTHETIC");
first = false;
}
if ((access & Opcodes.ACC_DEPRECATED) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_DEPRECATED");
first = false;
}
if ((access & Opcodes.ACC_MANDATED) != 0) {
if (!first) {
buf.append(" + ");
}
buf.append("ACC_MANDATED");
first = false;
}
if (first) {
buf.append('0');
}
}
/**
* Appends a string representation of the given constant to the given
* buffer.
*
* @param cst
* an {@link Integer}, {@link Float}, {@link Long},
* {@link Double} or {@link String} object. May be null.
*/
protected void appendConstant(final Object cst) {
appendConstant(buf, cst);
}
/**
* Appends a string representation of the given constant to the given
* buffer.
*
* @param buf
* a string buffer.
* @param cst
* an {@link Integer}, {@link Float}, {@link Long},
* {@link Double} or {@link String} object. May be null.
*/
static void appendConstant(final StringBuffer buf, final Object cst) {
if (cst == null) {
buf.append("null");
} else if (cst instanceof String) {
appendString(buf, (String) cst);
} else if (cst instanceof Type) {
buf.append("Type.getType(\"");
buf.append(((Type) cst).getDescriptor());
buf.append("\")");
} else if (cst instanceof Handle) {
buf.append("new Handle(");
Handle h = (Handle) cst;
buf.append("Opcodes.").append(HANDLE_TAG[h.getTag()])
.append(", \"");
buf.append(h.getOwner()).append("\", \"");
buf.append(h.getName()).append("\", \"");
buf.append(h.getDesc()).append("\")");
} else if (cst instanceof Byte) {
buf.append("new Byte((byte)").append(cst).append(')');
} else if (cst instanceof Boolean) {
buf.append(((Boolean) cst).booleanValue() ? "Boolean.TRUE"
: "Boolean.FALSE");
} else if (cst instanceof Short) {
buf.append("new Short((short)").append(cst).append(')');
} else if (cst instanceof Character) {
int c = ((Character) cst).charValue();
buf.append("new Character((char)").append(c).append(')');
} else if (cst instanceof Integer) {
buf.append("new Integer(").append(cst).append(')');
} else if (cst instanceof Float) {
buf.append("new Float(\"").append(cst).append("\")");
} else if (cst instanceof Long) {
buf.append("new Long(").append(cst).append("L)");
} else if (cst instanceof Double) {
buf.append("new Double(\"").append(cst).append("\")");
} else if (cst instanceof byte[]) {
byte[] v = (byte[]) cst;
buf.append("new byte[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]);
}
buf.append('}');
} else if (cst instanceof boolean[]) {
boolean[] v = (boolean[]) cst;
buf.append("new boolean[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]);
}
buf.append('}');
} else if (cst instanceof short[]) {
short[] v = (short[]) cst;
buf.append("new short[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append("(short)").append(v[i]);
}
buf.append('}');
} else if (cst instanceof char[]) {
char[] v = (char[]) cst;
buf.append("new char[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append("(char)")
.append((int) v[i]);
}
buf.append('}');
} else if (cst instanceof int[]) {
int[] v = (int[]) cst;
buf.append("new int[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]);
}
buf.append('}');
} else if (cst instanceof long[]) {
long[] v = (long[]) cst;
buf.append("new long[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]).append('L');
}
buf.append('}');
} else if (cst instanceof float[]) {
float[] v = (float[]) cst;
buf.append("new float[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]).append('f');
}
buf.append('}');
} else if (cst instanceof double[]) {
double[] v = (double[]) cst;
buf.append("new double[] {");
for (int i = 0; i < v.length; i++) {
buf.append(i == 0 ? "" : ",").append(v[i]).append('d');
}
buf.append('}');
}
}
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.
*/
protected void declareLabel(final Label l) {
if (labelNames == null) {
labelNames = new HashMap();
}
String name = 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.
*/
protected void appendLabel(final Label l) {
buf.append(labelNames.get(l));
}
}