org.apache.flex.abc.visitors

Class DelegatingMethodBodyVisitor

java.lang.Object

org.apache.flex.abc.visitors.DelegatingMethodBodyVisitor

All Implemented Interfaces:

IMethodBodyVisitor, IVisitor

Direct Known Subclasses:

DeadCodeFilter, PeepholeOptimizerMethodBodyVisitor

public class DelegatingMethodBodyVisitor
extends Object
implements IMethodBodyVisitor

Base class for various method body visitors that wish to modify the method body this class just passes all calls through to the delegate

Constructor Summary

Constructors

Constructor and Description
DelegatingMethodBodyVisitor(IMethodBodyVisitor delegate)

Method Summary

Methods

Modifier and Type	Method and Description
void	labelCurrent(Label l) Bind a Label object (not to be confused with the AVM OP_label instruction) to the last-visited ABC instruction in this method.
void	labelNext(Label l) Bind a Label object (not to be confused with the AVM OP_label instruction) to the next ABC instruction that gets visited in this method
void	visit() Begin processing a method body.
void	visitEnd() Indicates that no further method calls will be made on this visitor instance.
int	visitException(Label from, Label to, Label target, Name exception_type, Name catch_var) Visit an exception handler.
void	visitInstruction(Instruction instruction) Vist an instruction
void	visitInstruction(int opcode) Visit an instruction with no operands.
void	visitInstruction(int opcode, int immediate_operand) Visit an instruction with an immediate operand.
void	visitInstruction(int opcode, Object single_operand) Visit an instruction with a single operand (convenience method).
void	visitInstruction(int opcode, Object[] operands) Visit an instruction.
void	visitInstructionList(InstructionList new_list) Reset the method body's instruction list en bloc.
ITraitsVisitor	visitTraits() Visit the method body's traits (local variables).

Methods inherited from class java.lang.Object

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

Constructor Detail

DelegatingMethodBodyVisitor

public DelegatingMethodBodyVisitor(IMethodBodyVisitor delegate)

Method Detail

visit

public void visit()

Description copied from interface: IMethodBodyVisitor

Begin processing a method body.

Specified by:

visit in interface IMethodBodyVisitor

visitEnd

public void visitEnd()

Description copied from interface: IVisitor

Indicates that no further method calls will be made on this visitor instance. Interfaces that derive from this interface add more specific meaning to this method.

Specified by:

visitEnd in interface IVisitor

visitTraits

public ITraitsVisitor visitTraits()

Description copied from interface: IMethodBodyVisitor

Visit the method body's traits (local variables).

Specified by:

visitTraits in interface IMethodBodyVisitor

Returns:

a traits visitor, or null if the traits aren't of interest.

visitInstructionList

public void visitInstructionList(InstructionList new_list)

Description copied from interface: IMethodBodyVisitor

Reset the method body's instruction list en bloc.

Specified by:

visitInstructionList in interface IMethodBodyVisitor

visitInstruction

public void visitInstruction(int opcode)

Description copied from interface: IMethodBodyVisitor

Visit an instruction with no operands.

Specified by:

visitInstruction in interface IMethodBodyVisitor

Parameters:

opcode - - the instruction's opcode.

visitInstruction

public void visitInstruction(int opcode,
                    int immediate_operand)

Description copied from interface: IMethodBodyVisitor

Visit an instruction with an immediate operand.

Specified by:

visitInstruction in interface IMethodBodyVisitor

Parameters:

opcode - - the instruction's opcode.

immediate_operand - - the operand.

visitInstruction

public void visitInstruction(int opcode,
                    Object[] operands)

Description copied from interface: IMethodBodyVisitor

Visit an instruction.

Specified by:

visitInstruction in interface IMethodBodyVisitor

Parameters:

opcode - - the instruction's opcode.

operands - - the instruction's operands.

visitInstruction

public void visitInstruction(int opcode,
                    Object single_operand)

Description copied from interface: IMethodBodyVisitor

Visit an instruction with a single operand (convenience method).

Specified by:

visitInstruction in interface IMethodBodyVisitor

Parameters:

opcode - - the instruction's opcode.

single_operand - - the instruction's operand.

visitInstruction

public void visitInstruction(Instruction instruction)

Description copied from interface: IMethodBodyVisitor

Vist an instruction

Specified by:

visitInstruction in interface IMethodBodyVisitor

Parameters:

instruction - the Instruction to visit

visitException

public int visitException(Label from,
                 Label to,
                 Label target,
                 Name exception_type,
                 Name catch_var)

Description copied from interface: IMethodBodyVisitor

Visit an exception handler.

Specified by:

visitException in interface IMethodBodyVisitor

Parameters:

from - - the label that starts the "try" region.

to - - the label that ends the "try" region.

target - - the "catch" target.

exception_type - - the type of exception to be handled. "*" is valid and handles any exception.

catch_var - - the name of the exception variable. May be null if no exception variable is desired.

Returns:

the exception's exception number.

labelCurrent

public void labelCurrent(Label l)

Description copied from interface: IMethodBodyVisitor

Bind a Label object (not to be confused with the AVM OP_label instruction) to the last-visited ABC instruction in this method.

Specified by:

labelCurrent in interface IMethodBodyVisitor

labelNext

public void labelNext(Label l)

Description copied from interface: IMethodBodyVisitor

Bind a Label object (not to be confused with the AVM OP_label instruction) to the next ABC instruction that gets visited in this method

Specified by:

labelNext in interface IMethodBodyVisitor