public interface MethodVisitor
限定符和类型 | 方法和说明 |
---|---|
void |
visitAttribute(Attribute attr)
Visits a non standard attribute of this method.
|
void |
visitCode()
Starts the visit of the method's code, if any (i.e. non abstract method).
|
void |
visitEnd()
Visits the end of the method.
|
void |
visitFieldInsn(int opcode,
java.lang.String owner,
java.lang.String name,
java.lang.String desc)
Visits a field instruction.
|
void |
visitInsn(int opcode)
Visits a zero operand instruction.
|
void |
visitIntInsn(int opcode,
int operand)
Visits an instruction with a single int operand.
|
void |
visitJumpInsn(int opcode,
Label label)
Visits a jump instruction.
|
void |
visitLabel(Label label)
Visits a label.
|
void |
visitLineNumber(int line,
Label start)
Visits a line number declaration.
|
void |
visitLookupSwitchInsn(Label dflt,
int[] keys,
Label[] labels)
Visits a LOOKUPSWITCH instruction.
|
void |
visitMaxs(int maxStack,
int maxLocals)
Visits the maximum stack size and the maximum number of local variables
of the method.
|
void |
visitMethodInsn(int opcode,
java.lang.String owner,
java.lang.String name,
java.lang.String desc)
Visits a method instruction.
|
void |
visitTryCatchBlock(Label start,
Label end,
Label handler,
java.lang.String type)
Visits a try catch block.
|
void |
visitTypeInsn(int opcode,
java.lang.String type)
Visits a type instruction.
|
void |
visitVarInsn(int opcode,
int var)
Visits a local variable instruction.
|
void visitAttribute(Attribute attr)
attr
- an attribute.void visitCode()
void visitInsn(int opcode)
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.void visitIntInsn(int opcode, 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.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
.void visitVarInsn(int opcode, int var)
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.void visitTypeInsn(int opcode, java.lang.String type)
opcode
- the opcode of the type instruction to be visited. This
opcode is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.type
- the operand of the instruction to be visited. This operand
must be the internal name of an object or array class (see getInternalName
).void visitFieldInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc)
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
).void visitMethodInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc)
opcode
- the opcode of the type instruction to be visited. This
opcode is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC,
INVOKEINTERFACE or INVOKEDYNAMIC.owner
- the internal name of the method's owner class (see getInternalName
)
or Opcodes.INVOKEDYNAMIC_OWNER
.name
- the method's name.desc
- the method's descriptor (see Type
).void visitJumpInsn(int opcode, Label label)
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.void visitLabel(Label label)
label
- a Label
object.void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels)
dflt
- beginning of the default handler block.keys
- the values of the keys.labels
- beginnings of the handler blocks. labels[i] is
the beginning of the handler block for the keys[i] key.void visitTryCatchBlock(Label start, Label end, Label handler, java.lang.String type)
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).java.lang.IllegalArgumentException
- if one of the labels has already been
visited by this visitor (by the visitLabel
method).void visitLineNumber(int line, Label start)
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.java.lang.IllegalArgumentException
- if start has not already been
visited by this visitor (by the visitLabel
method).void visitMaxs(int maxStack, int maxLocals)
maxStack
- maximum stack size of the method.maxLocals
- maximum number of local variables for the method.void visitEnd()