Package org.springframework.cglib.core

Class LocalVariablesSorter

java.lang.Object

org.springframework.asm.MethodVisitor

org.springframework.cglib.core.LocalVariablesSorter

Direct Known Subclasses:

CodeEmitter

public class LocalVariablesSorter
extends MethodVisitor

A MethodVisitor that renumbers local variables in their order of appearance. This adapter allows one to easily add new local variables to a method.

Author:

Chris Nokleberg, Eric Bruneton

Field Summary

Fields

Modifier and Type	Field	Description
protected final int	firstLocal

Fields inherited from class org.springframework.asm.MethodVisitor

api, mv

Constructor Summary

Constructors

Constructor	Description
LocalVariablesSorter(int access, String desc, MethodVisitor mv)
LocalVariablesSorter(LocalVariablesSorter lvs)

Method Summary

Modifier and Type	Method	Description
protected int	newLocal(int size)
void	visitIincInsn(int var, int increment)	Visits an IINC instruction.
void	visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index)	Visits a local variable declaration.
void	visitMaxs(int maxStack, int maxLocals)	Visits the maximum stack size and the maximum number of local variables of the method.
void	visitVarInsn(int opcode, int var)	Visits a local variable instruction.

Methods inherited from class org.springframework.asm.MethodVisitor

getDelegate, visitAnnotableParameterCount, visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitFieldInsn, visitFrame, visitInsn, visitInsnAnnotation, visitIntInsn, visitInvokeDynamicInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLineNumber, visitLocalVariableAnnotation, visitLookupSwitchInsn, visitMethodInsn, visitMethodInsn, visitMultiANewArrayInsn, visitParameter, visitParameterAnnotation, visitTableSwitchInsn, visitTryCatchAnnotation, visitTryCatchBlock, visitTypeAnnotation, visitTypeInsn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

firstLocal

protected final int firstLocal

Constructor Details

LocalVariablesSorter

public LocalVariablesSorter(int access,
 String desc,
 MethodVisitor mv)

LocalVariablesSorter

public LocalVariablesSorter(LocalVariablesSorter lvs)

Method Details

visitVarInsn

public void visitVarInsn(int opcode,
 int var)

Description copied from class: MethodVisitor

Visits a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable.

Overrides:

visitVarInsn in class MethodVisitor

Parameters:

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.

visitIincInsn

public void visitIincInsn(int var,
 int increment)

Description copied from class: MethodVisitor

Visits an IINC instruction.

Overrides:

visitIincInsn in class MethodVisitor

Parameters:

var - index of the local variable to be incremented.

increment - amount to increment the local variable by.

visitMaxs

public void visitMaxs(int maxStack,
 int maxLocals)

Description copied from class: MethodVisitor

Visits the maximum stack size and the maximum number of local variables of the method.

Overrides:

visitMaxs in class MethodVisitor

Parameters:

maxStack - maximum stack size of the method.

maxLocals - maximum number of local variables for the method.

visitLocalVariable

public void visitLocalVariable(String name,
 String desc,
 String signature,
 Label start,
 Label end,
 int index)

Description copied from class: MethodVisitor

Visits a local variable declaration.

Overrides:

visitLocalVariable in class MethodVisitor

Parameters:

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.

newLocal

protected int newLocal(int size)