org.objectweb.asm.util

Class ASMifierCodeVisitor

Implemented Interfaces:
CodeVisitor

public class ASMifierCodeVisitor
extends PrintCodeVisitor

A PrintCodeVisitor that prints the ASM code that generates the code it visits.
Author:
Eric Bruneton, Eugene Kuleshov

Field Summary

Fields inherited from class org.objectweb.asm.util.PrintCodeVisitor

OPCODES, buf, text

Constructor Summary

ASMifierCodeVisitor()
Constructs a new ASMifierCodeVisitor object.

Method Summary

void
printAttribute(Attribute attr)
Prints a non standard code attribute.
void
printFieldInsn(int opcode, String owner, String name, String desc)
Prints a field instruction.
void
printIincInsn(int var, int increment)
Prints an IINC instruction.
void
printInsn(int opcode)
Prints a zero operand instruction.
void
printIntInsn(int opcode, int operand)
Prints an instruction with a single int operand.
void
printJumpInsn(int opcode, Label label)
Prints a jump instruction.
void
printLabel(Label label)
Prints a label.
void
printLdcInsn(Object cst)
Prints a LDC instruction.
void
printLineNumber(int line, Label start)
Prints a line number declaration.
void
printLocalVariable(String name, String desc, Label start, Label end, int index)
Prints a local variable declaration.
void
printLookupSwitchInsn(Label dflt, keys[] , labels[] )
Prints a LOOKUPSWITCH instruction.
void
printMaxs(int maxStack, int maxLocals)
Prints the maximum stack size and the maximum number of local variables of the method.
void
printMethodInsn(int opcode, String owner, String name, String desc)
Prints a method instruction.
void
printMultiANewArrayInsn(String desc, int dims)
Prints a MULTIANEWARRAY instruction.
void
printTableSwitchInsn(int min, int max, Label dflt, labels[] )
Prints a TABLESWITCH instruction.
void
printTryCatchBlock(Label start, Label end, Label handler, String type)
Prints a try catch block.
void
printTypeInsn(int opcode, String desc)
Prints a type instruction.
void
printVarInsn(int opcode, int var)
Prints a local variable instruction.

Methods inherited from class org.objectweb.asm.util.PrintCodeVisitor

getText, printAttribute, printFieldInsn, printIincInsn, printInsn, printIntInsn, printJumpInsn, printLabel, printLdcInsn, printLineNumber, printLocalVariable, printLookupSwitchInsn, printMaxs, printMethodInsn, printMultiANewArrayInsn, printTableSwitchInsn, printTryCatchBlock, printTypeInsn, printVarInsn, visitAttribute, visitFieldInsn, visitIincInsn, visitInsn, visitIntInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLineNumber, visitLocalVariable, visitLookupSwitchInsn, visitMaxs, visitMethodInsn, visitMultiANewArrayInsn, visitTableSwitchInsn, visitTryCatchBlock, visitTypeInsn, visitVarInsn

Constructor Details

ASMifierCodeVisitor

public ASMifierCodeVisitor()

Method Details

printAttribute

public void printAttribute(Attribute attr)
Prints a non standard code attribute.
Overrides:
printAttribute in interface PrintCodeVisitor
Parameters:
attr - a non standard code attribute.

printFieldInsn

public void printFieldInsn(int opcode,
                           String owner,
                           String name,
                           String desc)
Prints a field instruction. A field instruction is an instruction that loads or stores the value of a field of an object.
Overrides:
printFieldInsn in interface PrintCodeVisitor
Parameters:
opcode - the opcode of the type instruction to be printed. This opcode is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
owner - the internal name of the field's owner class (see getInternalName).
name - the field's name.
desc - the field's descriptor (see Type).

printIincInsn

public void printIincInsn(int var,
                          int increment)
Prints an IINC instruction.
Overrides:
printIincInsn in interface PrintCodeVisitor
Parameters:
var - index of the local variable to be incremented.
increment - amount to increment the local variable by.

printInsn

public void printInsn(int opcode)
Prints a zero operand instruction.
Overrides:
printInsn in interface PrintCodeVisitor
Parameters:
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.

printIntInsn

public void printIntInsn(int opcode,
                         int operand)
Prints an instruction with a single int operand.
Overrides:
printIntInsn in interface PrintCodeVisitor
Parameters:
opcode - the opcode of the instruction to be printed. This opcode is either BIPUSH, SIPUSH or NEWARRAY.
operand - the operand of the instruction to be printed.

printJumpInsn

public void printJumpInsn(int opcode,
                          Label label)
Prints a jump instruction. A jump instruction is an instruction that may jump to another instruction.
Overrides:
printJumpInsn in interface PrintCodeVisitor
Parameters:
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.
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.

printLabel

public void printLabel(Label label)
Prints a label. A label designates the instruction that will be visited just after it.
Overrides:
printLabel in interface PrintCodeVisitor
Parameters:
label - a Label object.

printLdcInsn

public void printLdcInsn(Object cst)
Prints a LDC instruction.
Overrides:
printLdcInsn in interface PrintCodeVisitor
Parameters:
cst - the constant to be loaded on the stack. This parameter must be a non null Integer, a Float, a Long, a Double or a String.

printLineNumber

public void printLineNumber(int line,
                            Label start)
Prints a line number declaration.
Overrides:
printLineNumber in interface PrintCodeVisitor
Parameters:
line - a line number. This number refers to the source file from which the class was compiled.
start - the first instruction corresponding to this line number.

printLocalVariable

public void printLocalVariable(String name,
                               String desc,
                               Label start,
                               Label end,
                               int index)
Prints a local variable declaration.
Overrides:
printLocalVariable in interface PrintCodeVisitor
Parameters:
name - the name of a local variable.
desc - the type descriptor of this local variable.
start - the first instruction corresponding to the scope of this local variable (inclusive).
end - the last instruction corresponding to the scope of this local variable (exclusive).
index - the local variable's index.

printLookupSwitchInsn

public void printLookupSwitchInsn(Label dflt,
                                  keys[] ,
                                  labels[] )
Prints a LOOKUPSWITCH instruction.
Overrides:
printLookupSwitchInsn in interface PrintCodeVisitor
Parameters:
dflt - beginning of the default handler block.

printMaxs

public void printMaxs(int maxStack,
                      int maxLocals)
Prints the maximum stack size and the maximum number of local variables of the method.
Overrides:
printMaxs in interface PrintCodeVisitor
Parameters:
maxStack - maximum stack size of the method.
maxLocals - maximum number of local variables for the method.

printMethodInsn

public void printMethodInsn(int opcode,
                            String owner,
                            String name,
                            String desc)
Prints a method instruction. A method instruction is an instruction that invokes a method.
Overrides:
printMethodInsn in interface PrintCodeVisitor
Parameters:
opcode - the opcode of the type instruction to be printed. This opcode is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
owner - the internal name of the method's owner class (see getInternalName).
name - the method's name.
desc - the method's descriptor (see Type).

printMultiANewArrayInsn

public void printMultiANewArrayInsn(String desc,
                                    int dims)
Prints a MULTIANEWARRAY instruction.
Overrides:
printMultiANewArrayInsn in interface PrintCodeVisitor
Parameters:
desc - an array type descriptor (see Type).
dims - number of dimensions of the array to allocate.

printTableSwitchInsn

public void printTableSwitchInsn(int min,
                                 int max,
                                 Label dflt,
                                 labels[] )
Prints a TABLESWITCH instruction.
Overrides:
printTableSwitchInsn in interface PrintCodeVisitor
Parameters:
min - the minimum key value.
max - the maximum key value.
dflt - beginning of the default handler block.

printTryCatchBlock

public void printTryCatchBlock(Label start,
                               Label end,
                               Label handler,
                               String type)
Prints a try catch block.
Overrides:
printTryCatchBlock in interface PrintCodeVisitor
Parameters:
start - beginning of the exception handler's scope (inclusive).
end - end of the exception handler's scope (exclusive).
handler - beginning of the exception handler's code.
type - internal name of the type of exceptions handled by the handler, or null to catch any exceptions (for "finally" blocks).

printTypeInsn

public void printTypeInsn(int opcode,
                          String desc)
Prints a type instruction. A type instruction is an instruction that takes a type descriptor as parameter.
Overrides:
printTypeInsn in interface PrintCodeVisitor
Parameters:
opcode - the opcode of the type instruction to be printed. This opcode is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
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 Type).

printVarInsn

public void printVarInsn(int opcode,
                         int var)
Prints a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable.
Overrides:
printVarInsn in interface PrintCodeVisitor
Parameters:
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.
var - the operand of the instruction to be printed. This operand is the index of a local variable.