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/***
* 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.CodeVisitor;
import oracle.toplink.libraries.asm.Label;
import oracle.toplink.libraries.asm.Attribute;
import java.util.ArrayList;
import java.util.List;
/**
* An abstract code visitor that prints the code it visits. Each
* visitXXX method clears the {@link #buf buf} buffer, calls the
* corresponding printXXX method, and then adds the buffer's
* content to the {@link #text text} list. In order to provide a concrete
* print code visitor, one must implement the printXXX methods
* in a sub class of this class. Each method should print the instructions it
* visits in {@link #buf buf}.
*
* @author Eric Bruneton, Eugene Kuleshov
*/
public abstract class PrintCodeVisitor implements CodeVisitor {
/**
* The text to be printed. See {@link PrintClassVisitor#text text}.
*/
protected final List text;
/**
* A buffer used to convert instructions to strings.
*/
protected final StringBuffer buf;
/**
* The names of the Java Virtual Machine opcodes.
*/
public final static String[] OPCODES = {
"NOP",
"ACONST_NULL",
"ICONST_M1",
"ICONST_0",
"ICONST_1",
"ICONST_2",
"ICONST_3",
"ICONST_4",
"ICONST_5",
"LCONST_0",
"LCONST_1",
"FCONST_0",
"FCONST_1",
"FCONST_2",
"DCONST_0",
"DCONST_1",
"BIPUSH",
"SIPUSH",
"LDC",
null,
null,
"ILOAD",
"LLOAD",
"FLOAD",
"DLOAD",
"ALOAD",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"IALOAD",
"LALOAD",
"FALOAD",
"DALOAD",
"AALOAD",
"BALOAD",
"CALOAD",
"SALOAD",
"ISTORE",
"LSTORE",
"FSTORE",
"DSTORE",
"ASTORE",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"IASTORE",
"LASTORE",
"FASTORE",
"DASTORE",
"AASTORE",
"BASTORE",
"CASTORE",
"SASTORE",
"POP",
"POP2",
"DUP",
"DUP_X1",
"DUP_X2",
"DUP2",
"DUP2_X1",
"DUP2_X2",
"SWAP",
"IADD",
"LADD",
"FADD",
"DADD",
"ISUB",
"LSUB",
"FSUB",
"DSUB",
"IMUL",
"LMUL",
"FMUL",
"DMUL",
"IDIV",
"LDIV",
"FDIV",
"DDIV",
"IREM",
"LREM",
"FREM",
"DREM",
"INEG",
"LNEG",
"FNEG",
"DNEG",
"ISHL",
"LSHL",
"ISHR",
"LSHR",
"IUSHR",
"LUSHR",
"IAND",
"LAND",
"IOR",
"LOR",
"IXOR",
"LXOR",
"IINC",
"I2L",
"I2F",
"I2D",
"L2I",
"L2F",
"L2D",
"F2I",
"F2L",
"F2D",
"D2I",
"D2L",
"D2F",
"I2B",
"I2C",
"I2S",
"LCMP",
"FCMPL",
"FCMPG",
"DCMPL",
"DCMPG",
"IFEQ",
"IFNE",
"IFLT",
"IFGE",
"IFGT",
"IFLE",
"IF_ICMPEQ",
"IF_ICMPNE",
"IF_ICMPLT",
"IF_ICMPGE",
"IF_ICMPGT",
"IF_ICMPLE",
"IF_ACMPEQ",
"IF_ACMPNE",
"GOTO",
"JSR",
"RET",
"TABLESWITCH",
"LOOKUPSWITCH",
"IRETURN",
"LRETURN",
"FRETURN",
"DRETURN",
"ARETURN",
"RETURN",
"GETSTATIC",
"PUTSTATIC",
"GETFIELD",
"PUTFIELD",
"INVOKEVIRTUAL",
"INVOKESPECIAL",
"INVOKESTATIC",
"INVOKEINTERFACE",
null,
"NEW",
"NEWARRAY",
"ANEWARRAY",
"ARRAYLENGTH",
"ATHROW",
"CHECKCAST",
"INSTANCEOF",
"MONITORENTER",
"MONITOREXIT",
null,
"MULTIANEWARRAY",
"IFNULL",
"IFNONNULL",
null,
null
};
/**
* Constructs a new {@link PrintCodeVisitor PrintCodeVisitor} object.
*/
protected PrintCodeVisitor () {
this.buf = new StringBuffer();
this.text = new ArrayList();
}
public void visitInsn (final int opcode) {
buf.setLength(0);
printInsn(opcode);
text.add(buf.toString());
}
public void visitIntInsn (final int opcode, final int operand) {
buf.setLength(0);
printIntInsn(opcode, operand);
text.add(buf.toString());
}
public void visitVarInsn (final int opcode, final int var) {
buf.setLength(0);
printVarInsn(opcode, var);
text.add(buf.toString());
}
public void visitTypeInsn (final int opcode, final String desc) {
buf.setLength(0);
printTypeInsn(opcode, desc);
text.add(buf.toString());
}
public void visitFieldInsn (
final int opcode,
final String owner,
final String name,
final String desc)
{
buf.setLength(0);
printFieldInsn(opcode, owner, name, desc);
text.add(buf.toString());
}
public void visitMethodInsn (
final int opcode,
final String owner,
final String name,
final String desc)
{
buf.setLength(0);
printMethodInsn(opcode, owner, name, desc);
text.add(buf.toString());
}
public void visitJumpInsn (final int opcode, final Label label) {
buf.setLength(0);
printJumpInsn(opcode, label);
text.add(buf.toString());
}
public void visitLabel (final Label label) {
buf.setLength(0);
printLabel(label);
text.add(buf.toString());
}
public void visitLdcInsn (final Object cst) {
buf.setLength(0);
printLdcInsn(cst);
text.add(buf.toString());
}
public void visitIincInsn (final int var, final int increment) {
buf.setLength(0);
printIincInsn(var, increment);
text.add(buf.toString());
}
public void visitTableSwitchInsn (
final int min,
final int max,
final Label dflt,
final Label labels[])
{
buf.setLength(0);
printTableSwitchInsn(min, max, dflt, labels);
text.add(buf.toString());
}
public void visitLookupSwitchInsn (
final Label dflt,
final int keys[],
final Label labels[])
{
buf.setLength(0);
printLookupSwitchInsn(dflt, keys, labels);
text.add(buf.toString());
}
public void visitMultiANewArrayInsn (final String desc, final int dims) {
buf.setLength(0);
printMultiANewArrayInsn(desc, dims);
text.add(buf.toString());
}
public void visitTryCatchBlock (
final Label start,
final Label end,
final Label handler,
final String type)
{
buf.setLength(0);
printTryCatchBlock(start, end, handler, type);
text.add(buf.toString());
}
public void visitMaxs (final int maxStack, final int maxLocals) {
buf.setLength(0);
printMaxs(maxStack, maxLocals);
text.add(buf.toString());
}
public void visitLocalVariable (
final String name,
final String desc,
final Label start,
final Label end,
final int index)
{
buf.setLength(0);
printLocalVariable(name, desc, start, end, index);
text.add(buf.toString());
}
public void visitLineNumber (final int line, final Label start) {
buf.setLength(0);
printLineNumber(line, start);
text.add(buf.toString());
}
public void visitAttribute (final Attribute attr) {
buf.setLength(0);
printAttribute(attr);
text.add(buf.toString());
}
/**
* Returns the code printed by this code visitor.
*
* @return the code printed by this code visitor. See {@link
* PrintClassVisitor#text text}.
*/
public List getText () {
return text;
}
/**
* Prints a zero operand instruction.
*
* @param opcode the opcode of the instruction to be printed. This opcode is
* either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2,
* ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1,
* FCONST_2, DCONST_0, DCONST_1,
*
* IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD,
* IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE,
* SASTORE,
*
* POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP,
*
* IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL,
* DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG,
* FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR,
* LOR, IXOR, LXOR,
*
* I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C,
* I2S,
*
* LCMP, FCMPL, FCMPG, DCMPL, DCMPG,
*
* IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN,
*
* ARRAYLENGTH,
*
* ATHROW,
*
* MONITORENTER, or MONITOREXIT.
*/
public abstract void printInsn (final int opcode);
/**
* Prints an instruction with a single int operand.
*
* @param opcode the opcode of the instruction to be printed. This opcode is
* either BIPUSH, SIPUSH or NEWARRAY.
* @param operand the operand of the instruction to be printed.
*/
public abstract void printIntInsn (final int opcode, final int operand);
/**
* Prints a local variable instruction. A local variable instruction is an
* instruction that loads or stores the value of a local variable.
*
* @param opcode the opcode of the local variable instruction to be printed.
* This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE,
* LSTORE, FSTORE, DSTORE, ASTORE or RET.
* @param var the operand of the instruction to be printed. This operand is
* the index of a local variable.
*/
public abstract void printVarInsn (final int opcode, final int var);
/**
* Prints a type instruction. A type instruction is an instruction that
* takes a type descriptor as parameter.
*
* @param opcode the opcode of the type instruction to be printed. This opcode
* is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
* @param desc the operand of the instruction to be printed. This operand is
* must be a fully qualified class name in internal form, or a the type
* descriptor of an array type (see {@link oracle.toplink.libraries.asm.Type Type}).
*/
public abstract void printTypeInsn (final int opcode, final String desc);
/**
* Prints a field instruction. A field instruction is an instruction that
* loads or stores the value of a field of an object.
*
* @param opcode the opcode of the type instruction to be printed. This opcode
* is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
* @param owner the internal name of the field's owner class (see {@link
* oracle.toplink.libraries.asm.Type#getInternalName() getInternalName}).
* @param name the field's name.
* @param desc the field's descriptor (see {@link oracle.toplink.libraries.asm.Type
* Type}).
*/
public abstract void printFieldInsn (
final int opcode,
final String owner,
final String name,
final String desc);
/**
* Prints a method instruction. A method instruction is an instruction that
* invokes a method.
*
* @param opcode the opcode of the type instruction to be printed. This opcode
* is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or
* INVOKEINTERFACE.
* @param owner the internal name of the method's owner class (see {@link
* oracle.toplink.libraries.asm.Type#getInternalName() getInternalName}).
* @param name the method's name.
* @param desc the method's descriptor (see {@link oracle.toplink.libraries.asm.Type
* Type}).
*/
public abstract void printMethodInsn (
final int opcode,
final String owner,
final String name,
final String desc);
/**
* Prints a jump instruction. A jump instruction is an instruction that may
* jump to another instruction.
*
* @param opcode the opcode of the type instruction to be printed. This opcode
* is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE,
* IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE,
* GOTO, JSR, IFNULL or IFNONNULL.
* @param label the operand of the instruction to be printed. This operand is
* a label that designates the instruction to which the jump instruction
* may jump.
*/
public abstract void printJumpInsn (final int opcode, final Label label);
/**
* Prints a label. A label designates the instruction that will be visited
* just after it.
*
* @param label a {@link Label Label} object.
*/
public abstract void printLabel (final Label label);
/**
* Prints a LDC instruction.
*
* @param cst the constant to be loaded on the stack. This parameter must be
* a non null {@link java.lang.Integer Integer}, a {@link java.lang.Float
* Float}, a {@link java.lang.Long Long}, a {@link java.lang.Double
* Double} or a {@link String String}.
*/
public abstract void printLdcInsn (final Object cst);
/**
* Prints an IINC instruction.
*
* @param var index of the local variable to be incremented.
* @param increment amount to increment the local variable by.
*/
public abstract void printIincInsn (final int var, final int increment);
/**
* Prints a TABLESWITCH instruction.
*
* @param min the minimum key value.
* @param max the maximum key value.
* @param dflt beginning of the default handler block.
* @param labels beginnings of the handler blocks. labels[i] is the
* beginning of the handler block for the min + i key.
*/
public abstract void printTableSwitchInsn (
final int min,
final int max,
final Label dflt,
final Label labels[]);
/**
* Prints a LOOKUPSWITCH instruction.
*
* @param dflt beginning of the default handler block.
* @param keys the values of the keys.
* @param labels beginnings of the handler blocks. labels[i] is the
* beginning of the handler block for the keys[i] key.
*/
public abstract void printLookupSwitchInsn (
final Label dflt,
final int keys[],
final Label labels[]);
/**
* Prints a MULTIANEWARRAY instruction.
*
* @param desc an array type descriptor (see {@link oracle.toplink.libraries.asm.Type
* Type}).
* @param dims number of dimensions of the array to allocate.
*/
public abstract void printMultiANewArrayInsn (
final String desc,
final int dims);
/**
* Prints a try catch block.
*
* @param start beginning of the exception handler's scope (inclusive).
* @param end end of the exception handler's scope (exclusive).
* @param handler beginning of the exception handler's code.
* @param type internal name of the type of exceptions handled by the handler,
* or null to catch any exceptions (for "finally" blocks).
*/
public abstract void printTryCatchBlock (
final Label start,
final Label end,
final Label handler,
final String type);
/**
* Prints the maximum stack size and the maximum number of local variables of
* the method.
*
* @param maxStack maximum stack size of the method.
* @param maxLocals maximum number of local variables for the method.
*/
public abstract void printMaxs (final int maxStack, final int maxLocals);
/**
* Prints a local variable declaration.
*
* @param name the name of a local variable.
* @param desc the type descriptor of this local variable.
* @param start the first instruction corresponding to the scope of this
* local variable (inclusive).
* @param end the last instruction corresponding to the scope of this
* local variable (exclusive).
* @param index the local variable's index.
*/
public abstract void printLocalVariable (
final String name,
final String desc,
final Label start,
final Label end,
final int index);
/**
* Prints a line number declaration.
*
* @param line a line number. This number refers to the source file
* from which the class was compiled.
* @param start the first instruction corresponding to this line number.
*/
public abstract void printLineNumber (final int line, final Label start);
/**
* Prints a non standard code attribute.
*
* @param attr a non standard code attribute.
*/
public abstract void printAttribute (final Attribute attr);
}
