A visitor to visit a Java method. The methods of this interface must be
called in the following order: [ visitAnnotationDefault ] (
visitAnnotation | visitParameterAnnotation |
visitAttribute )* [ visitCode ( visitXInsn |
visitLabel | visitTryCatchBlock | visitLocalVariable |
visitLineNumber)* visitMaxs ] visitEnd. In
addition, the visitXInsn and visitLabel
methods must be called in the sequential order of the bytecode instructions
of the visited code, and the visitLocalVariable and visitLineNumber
methods must be called after the labels passed as arguments have been
visited.
visitAnnotation
public AnnotationVisitor visitAnnotation(String desc,
boolean visible)
Visits an annotation of this method.
desc
- the class descriptor of the annotation class.visible
- true if the annotation is visible at runtime.
- a non null visitor to visit the annotation values.
visitAnnotationDefault
public AnnotationVisitor visitAnnotationDefault()
Visits the default value of this annotation interface method.
- a non null visitor to the visit the actual default value of this
annotation interface method. The 'name' parameters passed to the
methods of this annotation visitor are ignored. Moreover, exacly
one visit method must be called on this annotation visitor,
followed by visitEnd.
visitAttribute
public void visitAttribute(Attribute attr)
Visits a non standard attribute of this method.
visitCode
public void visitCode()
Starts the visit of the method's code, if any (i.e. non abstract method).
visitEnd
public void visitEnd()
Visits the end of the method. This method, which is the last one to be
called, is used to inform the visitor that all the annotations and
attributes of the method have been visited.
visitFieldInsn
public void visitFieldInsn(int opcode,
String owner,
String name,
String desc)
Visits 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 visited. 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
).
visitIincInsn
public void visitIincInsn(int var,
int increment)
Visits an IINC instruction.
var
- index of the local variable to be incremented.increment
- amount to increment the local variable by.
visitInsn
public void visitInsn(int opcode)
Visits a zero operand instruction.
opcode
- the opcode of the instruction to be visited. 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.
visitIntInsn
public void visitIntInsn(int opcode,
int operand)
Visits an instruction with a single int operand.
opcode
- the opcode of the instruction to be visited. This opcode is
either BIPUSH, SIPUSH or NEWARRAY.operand
- the operand of the instruction to be visited.
When opcode is BIPUSH, operand value should be between
Byte.MIN_VALUE and Byte.MAX_VALUE.
When opcode is SIPUSH, operand value should be between
Short.MIN_VALUE and Short.MAX_VALUE.
When opcode is NEWARRAY, operand value should be one of
Opcodes.T_BOOLEAN
, Opcodes.T_CHAR
,
Opcodes.T_FLOAT
, Opcodes.T_DOUBLE
,
Opcodes.T_BYTE
, Opcodes.T_SHORT
,
Opcodes.T_INT
or Opcodes.T_LONG
.
visitJumpInsn
public void visitJumpInsn(int opcode,
Label label)
Visits a jump instruction. A jump instruction is an instruction that may
jump to another instruction.
opcode
- the opcode of the type instruction to be visited. 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 visited. This operand
is a label that designates the instruction to which the jump
instruction may jump.
visitLabel
public void visitLabel(Label label)
Visits a label. A label designates the instruction that will be visited
just after it.
visitLdcInsn
public void visitLdcInsn(Object cst)
Visits 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
a String
(or a Type
for
.class constants, for classes whose version is 49.0 or
more).
visitLineNumber
public void visitLineNumber(int line,
Label start)
Visits 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.
visitLocalVariable
public void visitLocalVariable(String name,
String desc,
String signature,
Label start,
Label end,
int index)
Visits a local variable declaration.
name
- the name of a local variable.desc
- the type descriptor of this local variable.signature
- the type signature of this local variable. May be
null if the local variable type does not use generic
types.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.
visitLookupSwitchInsn
public void visitLookupSwitchInsn(Label dflt,
keys[] ,
labels[] )
Visits a LOOKUPSWITCH instruction.
dflt
- beginning of the default handler block.
visitMaxs
public void visitMaxs(int maxStack,
int maxLocals)
Visits 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.
visitMethodInsn
public void visitMethodInsn(int opcode,
String owner,
String name,
String desc)
Visits a method instruction. A method instruction is an instruction that
invokes a method.
opcode
- the opcode of the type instruction to be visited. 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
).
visitMultiANewArrayInsn
public void visitMultiANewArrayInsn(String desc,
int dims)
Visits a MULTIANEWARRAY instruction.
desc
- an array type descriptor (see Type
).dims
- number of dimensions of the array to allocate.
visitParameterAnnotation
public AnnotationVisitor visitParameterAnnotation(int parameter,
String desc,
boolean visible)
Visits an annotation of a parameter this method.
parameter
- the parameter index.desc
- the class descriptor of the annotation class.visible
- true if the annotation is visible at runtime.
- a non null visitor to visit the annotation values.
visitTableSwitchInsn
public void visitTableSwitchInsn(int min,
int max,
Label dflt,
labels[] )
Visits a TABLESWITCH instruction.
min
- the minimum key value.max
- the maximum key value.dflt
- beginning of the default handler block.
visitTryCatchBlock
public void visitTryCatchBlock(Label start,
Label end,
Label handler,
String type)
Visits 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).
visitTypeInsn
public void visitTypeInsn(int opcode,
String desc)
Visits 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 visited. This
opcode is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.desc
- the operand of the instruction to be visited. This operand is
must be a fully qualified class name in internal form, or the type
descriptor of an array type (see Type
).
visitVarInsn
public void visitVarInsn(int opcode,
int var)
Visits 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 visited.
This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE,
LSTORE, FSTORE, DSTORE, ASTORE or RET.var
- the operand of the instruction to be visited. This operand is
the index of a local variable.