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LocalVariablesSorter (Drools 4.0.0.11754MR2 API) - JBoss RULES 4.0.0.11754MR2 API 英文版文档

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org.drools.asm.commons
Class LocalVariablesSorter

java.lang.Object
  org.drools.asm.MethodAdapter
      org.drools.asm.commons.LocalVariablesSorter

All Implemented Interfaces:

MethodVisitor

Direct Known Subclasses:

GeneratorAdapter

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public class LocalVariablesSorter
extends MethodAdapter

A MethodAdapter 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

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Field Summary
protected  int	firstLocal

 

Fields inherited from class org.drools.asm.MethodAdapter
mv

 

Constructor Summary
LocalVariablesSorter(int access, String desc, MethodVisitor mv)

 

Method Summary
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.drools.asm.MethodAdapter
visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitFieldInsn, visitInsn, visitIntInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLineNumber, visitLookupSwitchInsn, visitMethodInsn, visitMultiANewArrayInsn, visitParameterAnnotation, visitTableSwitchInsn, visitTryCatchBlock, visitTypeInsn

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

firstLocal

protected final int firstLocal

Constructor Detail

LocalVariablesSorter

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

Method Detail

visitVarInsn

public void visitVarInsn(int opcode,
                         int var)

Description copied from interface: MethodVisitor

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

Specified by:

visitVarInsn in interface MethodVisitor

Overrides:

visitVarInsn in class MethodAdapter

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.

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visitIincInsn

public void visitIincInsn(int var,
                          int increment)

Description copied from interface: MethodVisitor

Visits an IINC instruction.

Specified by:

visitIincInsn in interface MethodVisitor

Overrides:

visitIincInsn in class MethodAdapter

Parameters:

var - index of the local variable to be incremented.

increment - amount to increment the local variable by.

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visitMaxs

public void visitMaxs(int maxStack,
                      int maxLocals)

Description copied from interface: MethodVisitor

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

Specified by:

visitMaxs in interface MethodVisitor

Overrides:

visitMaxs in class MethodAdapter

Parameters:

maxStack - maximum stack size of the method.

maxLocals - maximum number of local variables for the method.

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visitLocalVariable

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

Description copied from interface: MethodVisitor

Visits a local variable declaration.

Specified by:

visitLocalVariable in interface MethodVisitor

Overrides:

visitLocalVariable in class MethodAdapter

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.

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newLocal

protected int newLocal(int size)

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