An abstract code visitor that prints the code it visits. Each
visitXXX method clears the
buf
buffer, calls the
corresponding
printXXX method, and then adds the buffer's
content to the
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
buf
.
getText
public List getText()
Returns the code printed by this code visitor.
- the code printed by this code visitor. See
text
.
printAttribute
public abstract void printAttribute(Attribute attr)
Prints a non standard code attribute.
attr
- a non standard code attribute.
printFieldInsn
public abstract 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.
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 abstract void printIincInsn(int var,
int increment)
Prints an IINC instruction.
var
- index of the local variable to be incremented.increment
- amount to increment the local variable by.
printInsn
public abstract void printInsn(int opcode)
Prints a zero operand instruction.
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 abstract void printIntInsn(int opcode,
int operand)
Prints an instruction with a single int operand.
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 abstract void printJumpInsn(int opcode,
Label label)
Prints a jump instruction. A jump instruction is an instruction that may
jump to another instruction.
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 abstract void printLabel(Label label)
Prints a label. A label designates the instruction that will be visited
just after it.
printLdcInsn
public abstract void printLdcInsn(Object cst)
Prints a LDC instruction.
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 abstract void printLineNumber(int line,
Label start)
Prints a line number declaration.
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 abstract void printLocalVariable(String name,
String desc,
Label start,
Label end,
int index)
Prints a local variable declaration.
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 abstract void printLookupSwitchInsn(Label dflt,
keys[] ,
labels[] )
Prints a LOOKUPSWITCH instruction.
dflt
- beginning of the default handler block.
printMaxs
public abstract void printMaxs(int maxStack,
int maxLocals)
Prints the maximum stack size and the maximum number of local variables of
the method.
maxStack
- maximum stack size of the method.maxLocals
- maximum number of local variables for the method.
printMethodInsn
public abstract void printMethodInsn(int opcode,
String owner,
String name,
String desc)
Prints a method instruction. A method instruction is an instruction that
invokes a method.
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 abstract void printMultiANewArrayInsn(String desc,
int dims)
Prints a MULTIANEWARRAY instruction.
desc
- an array type descriptor (see Type
).dims
- number of dimensions of the array to allocate.
printTableSwitchInsn
public abstract void printTableSwitchInsn(int min,
int max,
Label dflt,
labels[] )
Prints a TABLESWITCH instruction.
min
- the minimum key value.max
- the maximum key value.dflt
- beginning of the default handler block.
printTryCatchBlock
public abstract void printTryCatchBlock(Label start,
Label end,
Label handler,
String type)
Prints a try catch block.
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 abstract void printTypeInsn(int opcode,
String desc)
Prints a type instruction. A type instruction is an instruction that
takes a type descriptor as parameter.
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 abstract 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.
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.
visitFieldInsn
public void visitFieldInsn(int opcode,
String owner,
String name,
String desc)
- visitFieldInsn in interface CodeVisitor
visitMethodInsn
public void visitMethodInsn(int opcode,
String owner,
String name,
String desc)
- visitMethodInsn in interface CodeVisitor