com.videobug.agent.weaver.method

Class MethodParameters

java.lang.Object

com.videobug.agent.weaver.method.MethodParameters

public class MethodParameters
extends Object

An instance of this class parses a method patameter descriptor. The object also records type and opcode information for loading/storing a parameter.

Constructor Summary

Constructors

Constructor and Description
MethodParameters(String desc) Create an instance

Method Summary

Modifier and Type	Method and Description
int	getLoadInstruction(int parameterIndex)
int	getLocalVar(int parameterIndex)
com.insidious.common.weaver.Descriptor	getRecordDesc(int parameterIndex)
int	getRecordWords(int parameterIndex)
int	getStoreInstruction(int parameterIndex)
org.objectweb.asm.Type	getType(int parameterIndex)
int	getTypeId(int parameterIndex)
int	getWords(int parameterIndex)
void	setLocalVar(int parameterIndex, int variableIndex) Record a local variable index for saving a parameter.
int	size()

Methods inherited from class java.lang.Object

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

Constructor Detail

MethodParameters

public MethodParameters(String desc)

Create an instance

Parameters:

desc - specifies a method descriptor, e.g. "(I)V".

Method Detail

setLocalVar

public void setLocalVar(int parameterIndex,
                        int variableIndex)

Record a local variable index for saving a parameter.

Parameters:

parameterIndex - index of the parameter in the local variable instruction

variableIndex - index of the variable used in the instruction

getLocalVar

public int getLocalVar(int parameterIndex)

Parameters:

parameterIndex - index of the parameter for which the associated variable index is look upon

Returns:

a local variable index for a parameter.

getWords

public int getWords(int parameterIndex)

Parameters:

parameterIndex - index of the parameter

Returns:

the number of words (1 or 2) for a parameter.

getRecordWords

public int getRecordWords(int parameterIndex)

Parameters:

parameterIndex - index of the parameter

Returns:

the size of words required for the parameter

getLoadInstruction

public int getLoadInstruction(int parameterIndex)

Parameters:

parameterIndex - index of the parameter

Returns:

the opcode to load a given parameter.

getStoreInstruction

public int getStoreInstruction(int parameterIndex)

Parameters:

parameterIndex - index of the parameter

Returns:

the opcode to store a given parameter.

getType

public org.objectweb.asm.Type getType(int parameterIndex)

Parameters:

parameterIndex - index of the parameter

Returns:

type of the parameter.

getTypeId

public int getTypeId(int parameterIndex)

Parameters:

parameterIndex - index of the parameter

Returns:

the type ID of a parameter.

getRecordDesc

public com.insidious.common.weaver.Descriptor getRecordDesc(int parameterIndex)

Parameters:

parameterIndex - index of the parameter

Returns:

the descriptor of a parameter type.

size

public int size()

Returns:

the number of parameters